Side Mounting Liquid Level Controls

Side Mounting
Liquid Level Controls
Installation and Operating Manual
Liquid
Level
Control
Read this Manual Before Installing
This manual provides information on Side Mounting
Liquid Level Controls. It is important that all instructions
are read carefully and followed in sequence. Detailed
instructions are included in the Installation section of
this manual.
Conventions Used in this Manual
Certain conventions are used in this manual to convey
specific types of information. General technical material,
support data, and safety information are presented in
narrative form. The following styles are used for notes,
cautions, and warnings.
NOTES
Notes contain information that augments or clarifies
an operating step. Notes do not normally contain
actions. They follow the procedural steps to which
they refer.
Cautions
Cautions alert the technician to special conditions that
could injure personnel, damage equipment, or reduce
a component’s mechanical integrity. Cautions are also
used to alert the technician to unsafe practices or the
need for special protective equipment or specific
materials. In this manual, a caution box indicates a
potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
WARNINGS
Warnings identify potentially dangerous situations or
serious hazards. In this manual, a warning indicates an
imminently hazardous situation which, if not avoided,
could result in serious injury or death.
Safety Messages
Follow all standard industry procedures for servicing electrical equipment when working with or around high
voltage. Always shut off the power supply before touching any components.
Low Voltage Directive
For use in Installation Category II, Pollution Degree 2. If
equipment is used in a manner not specified by the
manufacturer, protection provided by the equipment
may be impaired.
Notice of Trademark, Copyright, and Limitations
Magnetrol® & MAGNETROL logotype are registered
trademarks of MAGNETROL International.
Copyright © 2015 MAGNETROL International,
Incorporated. All rights reserved.
Performance specifications are effective with date of issue
and are subject to change without notice.
MAGNETROL reserves the right to make changes to the
product described in this manual at any time without
notice. MAGNETROL makes no warranty with respect
to the accuracy of the information in this manual.
Warranty
All MAGNETROL mechanical level and flow controls
are warranted free of defects in materials or workmanship
for five full years from the date of original factory shipment. Repair parts are warranted free of defects in materials and workmanship for one year from the date of shipment. Materials, specifications, and contents are subject
to change without prior written notice.
If returned within the warranty period; and, upon factory
inspection of the control, the cause of the claim is
determined to be covered under the warranty; then,
MAGNETROL will repair or replace the control at no
cost to the purchaser (or owner) other than transportation.
MAGNETROL shall not be liable for misapplication,
labor claims, direct or consequential damage or expense
arising from the installation or use of equipment.
There are no other warranties expressed or implied,
except special written warranties covering some
MAGNETROL products.
Quality Assurance
The quality assurance system in place at MAGNETROL
guarantees the highest level of quality throughout
the company. MAGNETROL is committed to providing
full customer satisfaction both in quality products and
quality service.
MAGNETROL’s quality assurance system is registered to ISO 9001 affirming
its commitment to known international
quality standards providing the
strongest assurance of product/service
quality available.
Side Mounting
Liquid Level Controls
Table of Contents
1.0 Introduction
1.1 Principle of Operation .............................................4
1.2 Operating Cycle.......................................................4
2.0 Installation .....................................................................4
2.1 Unpacking ...............................................................4
2.2 Mounting ................................................................5
2.3 Wiring .....................................................................6
2.4 Differential Adjustment ...........................................8
2.4.1 Level Differential vs. Mounting Nozzle
Length.........................................................10
3.0 Reference Information
3.1 Preventive Maintenance .........................................11
3.1.1 What To Do ...............................................11
3.1.2 What To Avoid...........................................12
3.2 Troubleshooting ....................................................13
3.2.1 Check Switch Mechanism...........................13
3.2.2 Check Sensing Unit ....................................14
3.2.3 Check Complete Unit.................................14
3.3 Agency Approvals ..................................................15
3.4 Specifications .........................................................16
3.4.1 Dimensional Specifications .........................16
3.4.2 Actuation Levels..........................................18
3.5 Replacement Parts .................................................19
3.5.1 Replacement Assemblies Parts
Identification ..............................................19
3.5.2 Models T52 and T63..................................20
3.5.3 Models T62 Threaded, T62 Flanged,
T67 Threaded and T67 Flanged .................21
3.6 Model Numbers ....................................................22
3.6.1 T52, T62, T63, T64 and T67 Models .......22
1.0
Side mounting controls mount horizontally to any tank
or vessel through a threaded or flanged pipe connection.
Standard models are equipped with a single switch
mechanism for high or low level alarm or control applications. Tandem models, with two switch mechanisms, are
available for two level stage applications—providing the
operating functions of two separate instruments, such as
high and low level alarm.
Pivot
Return
Spring
3
Introduction
2
1
Pivot
Float
1.1
Side mounting units employ permanent magnetic force as
the only link between the float and the switching element.
As the pivoted float follows liquid level changes, it moves
a magnetic sleeve (1) into or out of the field of a switch
actuating magnet (2) causing switch operation. A nonmagnetic barrier tube (3) effectively isolates the switch
mechanism from the controlled liquid.
Figure 1
Pivot
Return
spring
Swing out
position
Principle of Operation
1.2
Operating Cycle
As the liquid level falls in the vessel, refer to Figure 1, the
float moves the magnetic attraction sleeve up within the
enclosing tube and into the field of the switch mechanism
magnet. As a result, the magnet is drawn in tightly to the
enclosing tube causing the switch to trip, making or breaking an electrical circuit. As the liquid level rises, the float
moves the attraction sleeve out of the magnetic field,
releasing the switch at a predetermined level. Refer to
Figure 2. The tension spring ensures the return of the
switch in a snap action.
Figure 2
2.0
Installation
Caution: If equipment is used in a manner not specified by the
manufacturer, protection provided by the equipment may
be impaired.
2.1
Unpacking
Unpack the instrument carefully, making sure all components have been removed from the packing material.
Inspect all components for damage, and report any
concealed damage to the carrier within 24 hours.
4
44-602 Side Mounting Liquid Level Controls
Check the contents of the carton, making sure it agrees
with the packing slip and the purchase order. Verify that
the model number imprinted on the nameplate matches
the number on the packing slip and the purchase order.
Report any discrepancies to the factory. Check and record
the serial number for future reference when ordering parts.
2.2
Mounting
Caution: This instrument is intended for use in Installation Category
II, Pollution Degree 2.
Before assembling control to tank or vessel, check threaded
or flanged mounting nozzle for the following:
• Nozzle length and inside diameter must be sized correctly
to allow for switch actuation at design levels within the
maximum differential available. Refer to the chart on
page 10.
• Nozzle should be checked for horizontal alignment.
Finished mounting must allow control switch housing to
be within 3° of vertical for proper operation. A three
degree slant is noticeable by eye, but installation should
be checked with a spirit level on top and/or sides of
float body.
Caution: Operation of all buoyancy type level devices should be
done in such a way as to minimize the action of dynamic
forces on the float or displacer sensing element. Good
Lock Nut
practice for reducing the likelihood of damage to the conFloat Stem
trol is to equalize pressure across the device very slowly.
• Before installation, assemble float and stem to sensing
unit. See Figure 3.
Fulcrum Pin
1. Remove screw from end of fulcrum bar and replace with
float stem.
Fulcrum Bar
Figure 3
Float Stem Assembly
2. Make sure end of float stem sets completely in groove of
fulcrum pin as shown in Figure 3.
3 Tighten lock nut with wrench. If float stem is properly
located, fulcrum pin can not be pushed out.
44-602 Side Mounting Liquid Level Controls
5
2.3
Wiring
Caution: Level controls are shipped from the factory with the
enclosing tube tightened and the middle set screw, on the
housing base, locked to the enclosing tube. Failure to
loosen the set screw prior to repositioning the conduit
connection may cause the enclosing tube to loosen,
resulting in the possible leakage of the process liquid
or vapor.
Screw
Set
Screw
Screw
Figure 4
NEMA 4X, NEMA 4X/7/9
NEMA 4X/7/9 Group B
Side mounting controls are shipped with the conduit entry
of the switch housing placed 180° opposite to the tank
connections to simplify installation in most cases. If this
configuration is appropriate to the installation, proceed to
Step 4 to begin wiring the unit. If another configuration is
desired, the switch housing can be easily rotated by first
following Steps 1, 2, and 3.
NOTE: A switch or circuit breaker shall be installed in close proximity
to equipment and within easy reach of operator. It shall be
marked as the disconnecting device for the equipment.
1. Loosen set screw(s) at base of switch housing. Refer to
Figure 4.
2. Switch housing may be rotated 360° to allow correct
positioning of conduit outlet.
3. Tighten set screw(s) at base of switch housing.
4. Unscrew and remove switch housing cover. The threads
have been lubricated to facilitate removal.
5. The switch terminals are located next to the conduit outlet
to facilitate wiring. Bring supply wires through conduit
outlet. Route extra wire around enclosing tube under the
baffle plate, and connect them to the proper terminals.
Refer to the wiring diagram in your switch bulletin for
this information. Switch instruction manual numbers are
as indicated in chart on page 7.
6
44-602 Side Mounting Liquid Level Controls
Switch Series
Letter
Description
Bulletin
No.
B, C, D
Dry Contact Switch
42-683
G, H, I
Vibration Resistant Dry Contact
Switch, Dual Magnets
42-684
HS
Hermetically Sealed Snap Switch
42-694
J
Bleed Type Pneumatic Switch
42-685
K
Non-Bleed Type Pneumatic Switch
42-686
F, R, 8, 9
High Temperature Dry Contact Switch
42-799
NOTE: For supply connections, use wire with a minimum rating of
+167° F (+75° C) as required by the process conditions. Use
a minimum of 14 AWG wire for power and ground field wires.
NOTE: Housing must be grounded via protective ground screw in
base of housing.
Internal Circuit
(Left) Switch
Close on low level
4
1
5
2
6
3
Internal Circuit
(Right) Switch
Load
Load
Common
Common
Close on high level
Close on high level
Line
Close on low level
Load
Load
Figure 5
Wiring diagram for
side-mounted float switch
(except HS)
Line
6. Dress wiring to ensure no interference or contact
with the switch, or replacement of switch housing
cover.
OBSERVE ALL APPLICABLE ELECTRICAL
CODES AND PROPER WIRING
PROCEDURES.
Prevent moisture seepage into the enclosure by
installing approved seal-drain fittings in the
conduit run leading into the unit.
Caution: In hazardous areas, do not power the unit until
the conduit is sealed and the enclosure is
screwed down securely.
7. Replace housing cover.
8. If control has been furnished with an explosion
proof or moisture proof (gasketed) switch housing, it must be sealed at the conduit outlet with
a suitable compound or non-hardening sealant to
prevent entrance of air.
9. Test switch action by varying liquid level in float chamber.
NOTE: If switch mechanism fails to function properly, check vertical
alignment of control housing and consult installation bulletin
on switch mechanism furnished.
10. Check cover to base fit to be certain gasketed joint is tight.
A positive seal is necessary to prevent infiltration of moisture laden air or corrosive gasses into switch housings.
44-602 Side Mounting Liquid Level Controls
7
2.4
Guide
washer
The level differential of single switch models may be
adjusted by repositioning the jam nuts on the magnetic
sleeve stem as shown in Figure 6.
Upper jam nuts
A
B
Lower
jam nuts
Magnetic
sleeve
Pivot
Magnetic
sleeve stem
High level
CL of control
Figure 6
Refer to the chart below for the minimum and maximum
levels obtainable.
Inches (millimeters)
Differential
Pivot
Float stem length
minus approx. 3/4"
Differential Adjustment
Low level
Float
Differentials Obtainable ➁ ➃
Approx. Jam
Float
Stem
Length
Nut
Setting ➂
Model ➀
8.00 12.00 18.00 26.00
A
B
(230) (305)
(457) (660)
Min.
T52
Max.
Min.
T63
Max.
T62
(Threaded)
T62
(Flanged)
Min.
Max.
Min.
Max.
1.25
(32)
4.75
(121)
1.75
(44)
7.00
(178)
2.50
(64)
10.25
(260)
3.50
(89)
14.50
(368)
0.81
(21)
1.31
(33)
0.03
(0.8)
1.06
(27)
1.00
(25)
2.62
(67)
1.75
(44)
5.00
(127)
2.50
(64)
7.38
(187)
3.50
(89)
10.50
(267)
0.81
(21)
1.31
(33)
0.03
(0.8)
1.06
(27)
1.25
(32)
5.81
(148)
2.00
(51)
8.12
(206)
2.88
(73)
11.56
(294)
4.00
(102)
16.12
(409)
0.81
(21)
1.31
(33)
0.03
(0.8)
1.06
(27)
1.25
(32)
3.50
(89)
1.62
(41)
5.12
(130)
2.62
(67)
7.50
(191)
3.75
(95)
10.75
(273)
0.62
(16)
1.12
(28)
0.03
(0.8)
0.69
(18)
NOTES:
➀ All models are factory set at minimum differential unless otherwise
specified.
➁ To maintain maximum differential, nozzle length "L" (Fig. 3) must
not exceed: 2.38" (60 mm) model T52; 1.19" (30 mm) model T63;
2.50" (64 mm) model T62 threaded; or 3.50" (89 mm) model T62
flanged.
➂ Dimensions given are approximate and will vary slightly with each
unit.
➃ Consult factory for differentials of models not shown.
Caution: Before attempting any work on the control, be certain to
pull disconnect switch or otherwise assure that electrical
circuit(s) through control is deactivated. Close operating
medium supply valve on controls equipped with pneumatic switch mechanisms.
8
44-602 Side Mounting Liquid Level Controls
1. Disconnect wiring from supply side of switch mechanism
and electrical conduit or operating medium line connections to switch housing.
2. Perform system shutdown as required to relieve pressure
from tank or vessel and drain off liquid head above
control mounting position. Allow unit to cool.
3. Remove switch housing assembly by loosening hex nut
located immediately below the housing base.
With switch housing removed, jam nuts and magnetic
sleeve are now accessible. Refer to Figure 6. Raising the
lower jam nuts will reduce the differential. Jam nut
adjustments in opposite directions will increase the differential. As the first step in any adjustment procedure, the
position of the lower jam nuts (Dimension A) should
be established.
4. Loosen and remove upper jam nuts, guide washer and
magnetic sleeve. Dimension A, as measured from the top
of the stem to the top of the lower jam nuts, may now be
increased or decreased as required.
Tandem model controls should not be adjusted in the
field. If differential adjustment is required, consult factory.
NOTE: Be certain to tighten jam nuts securely after adjustment.
5. Replace magnetic sleeve on stem and position upper jam
nuts to desired B dimension by measuring from top of
sleeve to bottom of upper jam nuts to guide washer.
6. Reassemble control.
7. Test switch actuation by varying liquid level in tank or
vessel.
Caution: After increasing differential adjustment, be certain to
check carefully for proper operation of switch mechanism. Magnet must “snap” cleanly, with additional float
movement available after magnet snaps.
44-602 Side Mounting Liquid Level Controls
9
2.4
Differential Adjustment (cont.)
2.4.1 Level Differential vs. Mounting Nozzle Length
Minimum nozzle opening
Switch mechanism
actuates on rising level
CL of control
Level
differential
The table below may be used to determine the
maximum level travel (differential) available
between “Switch on” and “Switch off” actuations
with mounting nozzles of different lengths. The
differentials given occur with the minimum tank
opening diameter listed for each model and are
applicable to standard controls.
Switch mechanism
actuates on falling level
L➀
Figure 7
Inches (millimeters)
Maximum Level Differential Available with Several Nozzle Lengths ➄
Nozzle
Length ➀
In. (mm)
Model T52 with
3.12" (79 mm)
Diameter Minimum Tank
Nozzle Opening ➁
Model T63 with
2.31" (59 mm)
Diameter Minimum Tank
Nozzle Opening ➁
Model T62 Threaded
with 3.06" (78 mm)
Diameter Minimum Tank
Nozzle Opening ➂
Model T62 Flanged
with 2.88" (73 mm)
Diameter Minimum Tank
Nozzle Opening ➃
Float Stem Length
Float Stem Length
Float Stem Length
Float Stem Length
2.00
(51)
8.00
(203)
4.75
(121)
12.00
(305)
7.00
(178)
18.00
(457)
10.25
(260)
26.00
(660)
14.50
(368)
8.00
(203)
2.62
(67)
12.00
(305)
5.00
(127)
18.00
(457)
7.38
(187)
26.00
(660)
10.50
(267)
8.00
(203)
5.81
(148)
12.00
(305)
8.12
(206)
18.00
(457)
11.56
(294)
26.00
(660)
16.12
(409)
8.00
(203)
3.50
(89)
12.00
(305)
5.12
(130)
18.00
(457)
7.50
(191)
26.00
(660)
10.75
(273)
4.00
(102)
4.00
(102)
5.62
(143)
8.12
(206)
11.62
(295)
1.88
(48)
3.50
(89)
5.25
(133)
7.50
(191)
4.38
(111)
6.12
(155)
8.69
(221)
12.19
(310)
3.25
(83)
4.75
(121)
7.00
(178)
10.00
(254)
6.00
(152)
—
4.25
(108)
6.25
(159)
8.88
(226)
—
2.75
(70)
4.12
(105)
5.88
(149)
1.50
(38)
4.69
(119)
6.69
(170)
9.31
(236)
—
3.75
(95)
5.38
(137)
7.75
(197)
8.00
(203)
—
3.50
(89)
5.12
(130)
7.25
(184)
—
2.38
(60)
3.38
(86)
4.88
(124)
—
3.81
(97)
5.44
(138)
7.56
(192)
—
3.00
(76)
4.50
(114)
6.25
(159)
10.00
(254)
—
2.88
(73)
4.25
(108)
6.00
(152)
—
2.00
(51)
2.88
(73)
4.12
(105)
—
3.19
(81)
4.56
(116)
6.38
(162)
—
2.50
(64)
3.75
(95)
5.38
(137)
12.00
(305)
—
—
3.62
(92)
5.12
(130)
—
—
2.50
(64)
3.50
(89)
—
—
3.94
(100)
5.44
(138)
—
—
3.25
(83)
4.62
(117)
NOTES:
➀ Nozzle length is dimension L from end of standard control body to opening in tank having minimum diameter
listed for each model.
➁ Minimum diameter given is I.D. of float switch body.
➂ Minimum diameter given is I.D. of 3" schedule 40 pipe.
➃ Minimum diameter given is I.D. of 3" schedule 80 pipe.
➄ Consult factory for maximum differential available for models T64 and T67.
10
44-602 Side Mounting Liquid Level Controls
3.0
Reference Information
3.1
Preventive Maintenance
Periodic inspections are a necessary means to keep your
level control in good working order. This control is a
safety device to protect the valuable equipment it serves.
A systematic program of preventive maintenance must be
implemented when the control is placed into service. If the
following is observed, your control will provide reliable
protection of your capital equipment for many years.
3.1.1 What To Do
1. Keep control clean.
Be sure the switch housing cover is always in place on the
control. This cover is designed to keep dust and dirt from
interfering with switch mechanism operation. In addition,
it protects against damaging moisture and acts as a safety
feature by keeping bare wires and terminals from being
exposed. Should the housing cover or any seals become
damaged or misplaced, obtain a replacement immediately.
2. Inspect switch mechanisms, terminals, and connections
monthly.
a. Dry contact switches should be inspected for excessive
wear on actuating lever or misalignment of adjustment
screw at point of contact between screw and lever. Such
wear can cause false switch actuating levels. Adjust
switch mechanism to compensate (if possible) or
replace switch.
b. DO NOT operate your control with defective or maladjusted switch mechanisms (refer to bulletin on switch
mechanisms furnished for service instructions.)
c. Side mounting controls may sometimes be exposed to
excessive heat or moisture. Under such conditions,
insulation on electrical wiring may become brittle,
eventually breaking or pealing away. The resulting
“bare” wires can cause short circuits.
Check wiring carefully and replace at the first sign of brittle insulation.
d. Vibration may sometimes cause terminal screws to
work loose. Check all terminal connections to be certain that screws are tight.
44-602 Side Mounting Liquid Level Controls
11
e. On units with pneumatic switches, air (or gas) operating medium lines subjected to vibration, may eventually crack or become loose at connections causing leakage. Check lines and connections carefully and repair
or replace, if necessary.
NOTE: As a matter of good practice, spare switches should be kept
on hand at all times.
3. Inspect entire unit periodically.
Isolate control from vessel. Raise and lower liquid level to
check for switch contact and reset.
3.1.2 What To Avoid
1. NEVER leave switch housing cover off the control longer
than necessary to make routine inspections.
2. NEVER place a jumper wire across terminals to cut-out
the control. If a jumper is necessary for test purposes, be
certain it is removed before placing control into service.
3. NEVER attempt to make adjustments or replace switches
without reading instructions carefully. Certain adjustments
provided for in side mounting controls should not be
attempted in the field. When in doubt, consult the factory
or your local representative.
4. NEVER use lubricants on pivots of switch mechanisms. A
sufficient amount of lubricant has been applied at the factory to ensure a lifetime of service. Further oiling is unnecessary and will only tend to attract dust and dirt which can
interfere with mechanism operation.
12
44-602 Side Mounting Liquid Level Controls
3.2
Troubleshooting
Usually the first indication of improper operation is failure
of the controlled equipment to function, i.e.: pump will
not start (or stop), signal lamps fail to light, etc. When
these symptoms occur, whether at time of installation or
during routine service thereafter, check the following
potential external causes first.
—Fuses may be blown.
—Reset button(s) may need resetting.
—Power switch may be open.
—Controlled equipment may be faulty.
—Wiring leading to control may be defective.
If a thorough inspection of these possible conditions fails
to locate the trouble, proceed next to a check of the control's switch mechanism.
3.2.1 Check Switch Mechanism
1. Pull disconnect switch or otherwise disconnect power to
the control.
2. Remove switch housing cover.
3. Disconnect power wiring from switch assembly.
4. Swing magnet assembly in and out by hand to check carefully for any sign of binding. Assembly should require
minimal force to move it through its full swing.
5. If binding exists, magnet may be rubbing enclosing tube.
If magnet is rubbing, loosen magnet clamp screw and shift
magnet position. Retighten magnet clamp screw.
6. If switch magnet assembly swings freely and mechanism
still fails to actuate, check installation of control to be certain it is within the specified 3° of vertical. Use spirit level
on side of enclosing tube in two places, 90° apart.
7. Examine the switch closely as previously described in
Preventive Maintenance section. Check continuity of
switch with ohmmeter. If switch does not function
properly, replace it immediately.
8. If switch mechanism is operating satisfactorily, proceed to
check sensing unit.
44-602 Side Mounting Liquid Level Controls
13
3.2.2 Check Sensing Unit
1. Check to be certain liquid is entering float chamber. A
valve may be closed or piping plugged.
2. Proceed to check level sensing action by removing switch
housing assembly, as described in Steps 4 through 7 of the
Switch Differential Adjustment section on pages 8 and 9.
Caution: Unit must be normalized to atmospheric pressure before
removing switch housing assembly.
3. Inspect attraction sleeve(s) and inside of enclosing tube for
excessive corrosion or solids build-up which could restrict
movement, preventing sleeve(s) from reaching field of
magnet(s).
4. If the differential has been changed in the field, check
tightness and position of the jam nuts.
NOTE: Differential adjustment causes a change in the amount of level
travel between switch-on and switch-off actuations. Refer to
pages 8 and 9.
5. Vary liquid level in vessel. Check float to be certain it is
buoyant in the liquid (vessel must have adequate liquid
level). If float is determined to be filled with liquid or
collapsed, float must be replaced. Do not attempt to
repair a float.
3.2.3 Check Complete Unit
Caution: With electrical power on, care should be taken to avoid
contact with switch leads and connections at terminal
block.
Reassemble unit. Reconnect power supply and carefully
actuate switch mechanism manually (using a non-conductive tool) to determine whether controlled equipment will
operate.
If all components in the control are in operating condition, the trouble must be (and should be) located external
to the control. Repeat inspection of external conditions
previously described.
NOTE: If difficulties are encountered which cannot be identified, consult the factory or your local representative for assistance. A
complete description of the trouble should be provided along
with information concerning your piping and mounting
arrangement, plus a description of your operating sequence.
Sketches or photographs showing the installation are also
beneficial.
When communicating about your control, be certain always to
specify the complete Model and Serial numbers.
14
44-602 Side Mounting Liquid Level Controls
3.3
Agency Approvals
AGENCy
APPrOvED MODEL
APPrOvAL CLASSES
FM
All with an electric switch mechanism and a housing
listed as Type 4X/7/9
Class I, Div 1, Groups C & D
Class II, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
listed as Type 4X/7/9 Class I, Div 1, Group B
Class I, Div 1, Groups B, C & D
Class II, Div 1, Groups E, F & G
All with a Series HS, F, 8 or 9 electric switch mechanism
and a housing listed as CSA Type 4X
Class I, Div 2, Groups A, B, C & D
All with an electric switch mechanism and a housing
listed as Type 4X/7/9
Class I, Div 1, Groups C & D
Class II, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
listed as Type 4X/7/9 Class I, Div 1, Group B
Class I, Div 1, Groups B, C & D
Class II, Div 1, Groups E, F & G
All with an electric switch mechanism and an
ATEX housing ➀
ATEX II 2 G EEx d IIC T6
94/9/EC
IEC Ex Ex d IIC T6
IP 66
Low Voltage Directives 2006/95/EC
Per Harmonized Standard:
EN 61010-1/1993 & Amendment No. 1
Installation Category II
Pollution Degree 2
CSA
ATEX / IEC Ex ➁
CE
➀ Dual stage units with ‘HS’ switches are not ATEX approved.
➁ IEC Installation Instructions:
The cable entry and closing devices shall be Ex d certified suitable for the conditions of use
and correctly installed.
For ambient temperatures above +55° C or for process temperatures above +150° C, suitable
heat resistant cables shall be used.
Heat extensions (between process connection and housing) shall never be insulated.
Special conditions for safe use:
When the equipment is installed in process temperatures higher than +85° C the temperature
classification must be reduced according to the following table as per IEC60079-0.
Maximum Process
Temperature
Temperature
Classification
< 85° C
T6
< 100° C
T5
< 135° C
T4
< 200° C
T3
< 300° C
T2
< 450° C
T1
These units are in conformity with IECEx KEM 05.0020X
Classification Ex d IIC T6
Tambient -40° C to +70° C
44-602 Side Mounting Liquid Level Controls
15
3.4
Specifications
3.4.1 Dimensional Specifications
Inches (mm)
3.12 (79)
Dia. Hole
Single switch models
B
A
This dimension equals
stem length plus
float length minus
2.50 (64).
4.50 (114)
45°
45°
C
plugged
D
Four 1/2" studs extending
1.25 (32) from tank on
4.62 (117) bolt circle.
Min. nozzle
opening
3.12 (79) dia.
Switch actuates
rising level
2.25
(57)
W
2
W
CL of control
Switch actuates
falling level
L
4.50 (114)
Square flange
This dimension equals
stem length plus
float length minus
2.25 (67).
2.50 (64) dia. float (std)
B
Model T52 with flanged body
A
Figure 8
4.50 (114)
plugged
C
D
Min. nozzle opening
3.06 (78) diameter
Switch actuates
rising level
W
2
This dimension equals
float stem length minus
3.38 (86).
Rotation clearance
5.25 (133)
A
B
1.75
(44)
3.00 (76)
Male pipe
thread
L
W
Switch actuates
falling level
Model T62 with threaded body
.93
(23)
Min. nozzle
opening
2.31 (59)
C
D
Figure 9
Thread
Plugged
Switch actuates
rising level
W
2
CLof control
W
1.94 (49)
2 1/2" NPT
L
Switch actuates
falling level
Model T63 with threaded body
Figure 10
16
44-602 Side Mounting Liquid Level Controls
3.4
Specifications
3.4.1 Dimensional Specifications (cont.)
Inches (mm)
Tandem switch models
This dimension equals
stem length plus
float length minus
2.54 (65).
B
4.50 (114)
A
Min. Nozzle
Opening
2.31 (59)
C
D
"A" mechanism
actuates on rising level
plugged
Y
W
"A" on falling level
"B" on rising level
X
Z
"B" mechanism
actuates on falling level
3.00 Male
pipe threads
2.25 Maximum nozzle
(57) length (L) to inside of tank
This dimension equals
stem length plus
float length minus
2.92 (74).
B
Model T67 with threaded body
A
Figure 11
4.75 (121)
C
plugged
"A" mechanism
actuates on rising level
D
Y W
"A" on falling level
"B" on rising level
X
Z
"B" mechanism
actuates on falling level
Flange bolt holes
straddle vertical C
L
3.50
(89)
Maximum nozzle length (L)
to inside of tank
Model T67 with flanged body
Figure 12
Outline Dimensions
T52/T62
Housing
NEMA 4X
NEMA 4X/7/9
GROUP B
NEMA 1
PNEUMATIC
T63
T67
A
B
C
3.87
(98)
5.93
(151)
10.69
(272)
10.69
(272)
12.88
(327)
Electrical Switches
NEMA 4X/7/9: 1" NPT
Group B:
1" NPT
5.00
(127)
4.69
(119)
9.00
(229)
9.12
(323
—
Pneumatic Switches
1/4" NPT
NEMA 1:
44-602 Side Mounting Liquid Level Controls
Conduit Connections D
NOTE:
Allow 8.00 (203) overhead
clearance for cover removal.
17
3.4
Specifications
3.4.2 Actuation Levels
Inches (mm)
Model T52
Length
of
Float
Stem
8.00
12.00
18.00
26.00
(203)
(305)
(457)
(660)
Differential Levels
Obtainable
W
Minimum Maximum
1.25 (32)
4.75 (121)
1.75 (44)
7.00 (178)
2.50 (64) 10.25 (260)
3.50 (89) 14.50 (368)
Maximum Differential (W) with
Nozzle Lengths (L) of
2.00 (51)
4.00
7.00
10.25
14.50
(102)
(178)
(260)
(368)
4.00 (102)
6.00 (152)
8.00 (203)
10.00 (254)
–
5.62 (143)
8.12 (206)
11.62 (295)
–
4.25 (108)
6.25 (159)
8.88 (226)
–
3.50 (89)
5.12 (130)
7.25 (184)
–
2.88 (73)
4.25 (108)
6.00 (152)
Maximum Nozzle
Length (L) to
Maintain Maximum
12.00 (305)
Differential
–
–
3.62 (92)
5.12 (130)
2.38 (60)
Model T62 with threaded body
Length
of
Float
Stem
8.00
12.00
18.00
26.00
(203)
(305)
(457)
(660)
Differential Levels
Obtainable
W
Minimum Maximum
1.25 (32) 5.81 (148)
2.00 (51) 8.12 (206)
2.88 (73) 11.56 (294)
4.00 (102) 16.16 (410)
Maximum Differential (W) with
Nozzle Lengths (L) of
2.00 (51)
5.81
8.12
11.56
16.16
(148)
(206)
(294)
(410)
4.00 (102)
6.00 (152)
8.00 (203)
10.00 (254)
4.38
6.12
8.69
12.19
1.50
4.69
6.69
9.31
–
3.81 (97)
5.44 (138)
7.56 (192)
–
3.19 (81)
4.56 (116)
6.38 (162)
(111)
(155)
(221)
(310)
(38)
(119)
(170)
(236)
Maximum Nozzle
Length (L) to
Maintain Maximum
12.00 (305)
Differential
–
–
3.94 (100)
5.44 (138)
2.50 (64)
Model T63
Length
of
Float
Stem
8.00 (203)
12.00 (305)
18.00 (457)
26.00 (660)
Differential Levels
Obtainable
W
Minimum Maximum
1.00 (25)
2.62 (67)
1.75 (44)
5.00 (127)
2.50 (64)
7.38 (187)
3.50 (89) 10.50 (267)
Maximum Differential (W) with
Nozzle Lengths (L) of
2.00 (51)
2.62
5.00
7.38
10.50
(67)
(127)
(187)
(267)
4.00 (102)
6.00 (152)
1.88
3.50
5.25
7.50
–
–
–
–
2.75 (70)
4.12 (105)
5.88 (149)
2.38 (61)
3.38 (86)
4.88 (124)
2.00 (51)
2.88 (73)
4.12 (105)
–
2.50 (64)
3.50 (89)
(48)
(89)
(133)
(190)
8.00 (203)
10.00 (254)
Maximum Nozzle
Length (L) to
Maintain Maximum
12.00 (305)
Differential
1.19 (30)
Model T67
Length of
Float Stem
8.00
12.00
18.00
26.00
(203)
(305)
(457)
(660)
Switch Actuation Levels Obtainable
With Standard Length Float Stems ➀
W&X➁
y&Z➂
Minimum
Maximum
Minimum
Maximum
2.50 (64)
2.50 (64)
1.00 (25)
2.50 (64)
3.75 (95)
3.75 (95)
1.50 (38)
3.75 (95)
5.50 (140)
5.50 (140)
2.12 (54)
5.50 (140)
7.75 (197)
7.75 (197)
3.00 (76)
7.75 (197)
➀ Differential adjustment on tandem units must be done at the factory.
Advise required differentials at time of order placement.
➁ Dimensions W and X set for maximum unless otherwise specified.
➂ Dimensions Y and Z set for maximum unless otherwise specified.
18
44-602 Side Mounting Liquid Level Controls
3.5
Replacement Parts
3.5.1 replacements Assemblies Parts Identification
Spacer Bracket for
Tandem Switch Mechanisms
1
20
7
4
5
8
3
6
2
Serial No. Tag
(Ref.)
14
9
21
19
16
10
18
(T63)
18
(T52 and T57)
12
11
13
15
16
17
Figure 13
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Description
Switch housing cover
Switch housing base
Switch mechanism
Spacer bracket
Rd head screws
Attraction sleeve(s)
Jam nuts
Guide washer
Sleeve stem
Connecting pin
Fulcrum
Fulcrum pin
Pivot bracket
Rd head screws
Float stem
Stem lock nuts
Float
Body
E-tube gasket
Enclosing tube
Flange gasket
20
1
3
7
8
2
Serial No. Tag
(Ref.)
18 (T62 and T67)
Flanged
6
16
19
9
10
18
(T62 and T67)
Threaded
11
12
21
15
17
Figure 14
44-602 Side Mounting Liquid Level Controls
19
3.5
Replacement Parts
3.5.2 Models T52 and T63
Switch hsg cover
Switch hsg base
Switch mechanism
Spacer bracket
Rd head screws
Standard sleeve assy ➀
(includes items 6 through 16)
Sheathed sleeve assy ➀
(includes items 6 through 16)
Float
2.50
2.50 x 4.00
3.00
Body
E-tube gasket
Enclosing tube
Flange gasket
T52
T63
Refer to Bulletin 42-680/42-780 for switch housing cover and base assembly
Refer to Bulletin 42-680/42-780 for switch housing cover and base assembly
Refer to bulletin on switch mechanism furnished (refer to chart on page 7)
Not required
Not required
089-5508-001
089-5516-001
089-5517-001
Z07-1102-001
Z07-1202-001
Z07-1202-004
Z07-1102-004
Consult Factory
012-1301-002
Z32-6325-001 ➁
012-1301-003
Not Required
NOTES:
All replacement assemblies listed are for standard base models which use Series B, C, D, F, 8, 9 and J switch
mechanisms only. Consult your local representative for ordering assistance on all special model replacement parts
not listed above.
➀ Sleeve kits contain 8.00 inch (203 mm) stem lengths. Consult factory for longer stem lengths. Standard sleeve
is type 400 series stainless steel. Sheathed attraction sleeves are used on models specified for corrosive
service. Sheathed sleeve kits are used on models with material of construction codes 2 through 9.
➁ This e-tube is for models with material of construction code 1 only. Consult factory for e-tubes used with
other material of construction codes.
20
44-602 Side Mounting Liquid Level Controls
3.5
Replacement Parts
3.5.3 Models T62 Threaded, T62 Flanged, T67 Threaded and T67 Flanged
T62 Threaded
T62 Flanged
T67 Threaded
T67 Flanged
Switch hsg cover
Refer to Bulletin 42-680/42-780 for switch housing cover and base assembly
Switch hsg base
Refer to Bulletin 42-680/42-780 for switch housing cover and base assembly
Switch mechanism
Refer to bulletin on switch mechanism furnished (refer to chart on page 7)
Spacer bracket
Not required
005-7542-121
Rd head screws
Not required
010-1409-006
Standard sleeve assy➀
(includes items 6 through 16)
089-5510-001
089-5511-001
Sheathed sleeve assy ➀
(includes items 6 through 16)
089-5514-001
N/A
N/A
Float
2.50
089-5546-001
2.50 x 4.00
089-5553-001
3.00
089-5551-001
3.50
089-5552-001
3.00 x 5.00
089-5554-001
3.00 x 6.00
089-5555-001
Body
Consult Factory
E-tube gasket
012-1301-002
Z32-6325-007
Enclosing tube
Z32-6325-001 ➁
Flange gasket
Not Required
Not Available ➂
Not Required
Not Available ➂
NOTES:
All replacement assemblies listed are for standard base models which use Series B, C, D, F, 8, 9 and J switch
mechanisms only. Consult your local representative for ordering assistance on all special model replacement parts
not listed above.
➀ Sleeve kits contain 8.00 inch (203 mm) stem lengths. Consult factory for longer stem lengths. Standard sleeve
is type 400 series stainless steel. Sheathed attraction sleeves are used on models specified for corrosive
service. Sheathed sleeve kits are used on models with material of construction codes 2 through 9.
➁ This e-tube is for models with material of construction code 1 only. Consult factory for e-tubes used with other
material of construction codes.
➂ Flange gaskets used on models T62 and T67 are standard ANSI type, readily available at local supply houses.
44-602 Side Mounting Liquid Level Controls
21
3.6
Model Numbers
3.6.1 T52, T62, T63, T64 and T67 Models
MODEL NUMBEr, MATErIAL OF CONSTrUCTION AND TANK CONNECTION
Model
T52
T62
T63
T64
Set
Points Code
1
1
Description
2
psig @ °F
Code
Description
E3
4" Cast Iron Square
Flange
F2
3" NPT
1
2
Cast Iron body,
316 SS trim and sleeve
1
Carbon Steel body, 300 series
SS trim, 400 Series SS sleeve
2
3
Carbon Steel body,
316 SS trim and sleeve
304 SS body,
300 Series SS trim and sleeve
4
316 SS body, trim and sleeve
G3
G4
G5
H3
H4
H5
1
Cast Iron body, 300 Series SS
trim, 400 Series SS sleeve
E2
21⁄2" NPT
4
316 SS body, trim and sleeve
H3
4" 150 lb. RF Flange
1
Carbon Steel body,
300 Series SS trim,
400 Series SS sleeve
H4
4" 300 lb. RF Flange
H5
4" 600 lb. RF Flange
3"
3"
3"
4"
4"
4"
150
300
600
150
300
600
F2
T67
Pressure rating➀
Tank Connection
Cast Iron body, 300 Series SS
trim, 400 Series SS sleeve
1
1
Material of Construction
1
Carbon Steel body,
300 Series SS trim,
400 Series SS sleeve
lb.
lb.
lb.
lb.
lb.
lb.
RF
RF
RF
RF
RF
RF
3"
3"
3"
4"
150
300
600
150
lb.
lb.
lb.
lb.
RF
RF
RF
RF
100 450 750 900 1000 38
232 399 482 538
250 150
17
10
—
—
—
34
—
26
24
23
—
—
—
26
24
23
500
—
—
—
—
377 353 144
Flange
Flange
Flange
Flange
Flange
Flange
ANSI RF Flange Ratings
250 150
3" NPT
G3
G4
G5
H3
bar @ °C
—
—
—
17
10
ANSI RF Flange Ratings
500
—
377 353 144
Flange
Flange
Flange
Flange
34
—
ANSI RF Flange Ratings
FLOAT AND FLOAT STEM LENGTH
Float Size
All Models
Excluding T64
Inches
mm
2.50
64
2.50 ¥ 4.00
64 ¥ 102
3.00 ➂
76 ➂
3.50 ➁➃
89 ➁➃
3.00 ¥ 5.00 ➂➃ 76 ¥ 127 ➂➃
Model T64 Only
3.50
89
Float Stem Length and Specific Gravity rating
Inches mm Inches mm Inches mm Inches mm
8.00
203
12.00
305
18.00
457
26.00
660
Pressure/Temperature
ratings
PSIG @ ° F
Bar @ ° C
S.G. Code S.G. Code S.G. Code S.G. Code 100 750 900 1000 38 399 482
0.80
0.80
0.90
0.90
350 282 271 268 24 19 19
A
B
C
D
0.52
0.55
0.60
0.66
100 81 78 77 7
6
5
E
F
G
H
0.55
0.55
0.60
0.60
J
K
L
M 250 201 194 191 17 14 13
0.50
0.50
0.55
0.55
400 322 310 306 28 22 21
N
P
Q
r
0.65
0.65
0.70
0.70
S
T
v
W 500 377 353 335 34 26 24
0.40
N
—
—
—
—
—
—
1200 936 876 794 83
65
60
538
18
5
13
21
23
58
➀ Compare with float rating and use lower value for selection.
➁ Float cannot pass through 3" NPT opening.
➂ To pass float, tank nozzle internal bore diameter must not be less than
3.06 (78).
➃ 3.50 (89) diameter and 3.00 x 5.00 (76 x 127) floats not available in
models T52 and T63.
➄ Process temperature based on +100° F (+38° C) ambient.
≈ Dual switches available only with tandem model T67.
∆ CSA approval does not apply to Series HE switches.
« On condensing applications, temperature down-rated to +400° F.
» Pneumatic switches not available on models T64 or T67.
(Select from Next Page)
22
44-602 Side Mounting Liquid Level Controls
3.6
Model Numbers
3.6.1 T52, T62, T63, T64 and T67 Models (cont.)
ELECTrIC SWITCH MECHANISM AND ENCLOSUrE
Switch
Description
All models with Material of All models with Material of
Construction Code 1,
Construction Codes 2, 3 &
Model T64 only
Process ➄
except model T64
4, except model T64
Temperature
Set ≈
Contacts
TyPE 4X/7/9 Aluminum Enclosure
range
Points
I,
Div
I,
Div
Class
Class
ATEX
Class I, Div Class I, Div
ATEX
Class I, Div Class I, Div
ATEX
°F (°C)
Series B
Snap Switch
-40 to +250
(-40 to +121)
Series C
Snap Switch
-40 to +450
(-40 to +232)
DPDT
SPDT
DPDT
Series D DC Current -40 to +250
Snap Switch
(-40 to +121)
SPDT
DPDT
Series F
-50 to +750
Hermetically Sealed
(-46 to +399)
Snap Switch
SPDT
Series HS
Hermetically Sealed
5-amp Snap Switch
with Wiring Leads
Series HS
Hermetically Sealed
5-amp Snap Switch
with Terminal Block
Series R
High Temperature
Snap Switch
1
2
1
2
1
2
1
2
1
1
1
2
1
2
SPDT
DPDT
SPDT
-50 to +550«
(-46 to +288)
1
Groups C&D
1
Group B
BKP
BLA
BNP
BOA
CKP
CLA
CNP
COA
BKT
BLJ
BNT
BOJ
CKT
CLJ
CNT
COJ
Ex II 2 G EEx
1
d IIC T6 Groups C&D
BAC
BDC
BBC
BGC
CAC
CDC
CBC
CGC
—
FKP
FLA
FNP
FOA
FKT
FLJ
FNT
FOJ
FAC
FDC
FBC
FGC
1
BKQ
BNQ
CKQ
CNQ
DKQ
DNB
FKQ
FNQ
HMC
1
Group B
BKS
N/A
BNS
—
CKS
—
CNS
—
DKS
DNK
FKS
—
FNS
—
-50 to +550«
(-46 to +288)
1
SPDT
1
BA9
BKA
BB9
BNA
CA9
CKA
CB9
CNA
DA9
DF9
FA9
DKB
DNB
FKA
FB9
FNA
HEK∆
—
DPDT
Ex II 2 G EEx
1
d IIC T6 Groups C&D
1
Group B
Ex II 2 G EEx
d IIC T6
BKJ
N/A
BNJ
—
CKJ
—
CNJ
—
DKK
DNK
FKJ
—
FNJ
—
BCC
HMJ
HMK
HMS
HMT
—
BFC
CCC
CFC
DC9
DF9
FCC
FFC
—
HMF
HET∆
HM3
HM4
HA9
HM3
HM4
HA9
HM7
HM8
HB9
HM7
HM8
HB9
RKB
RKK
RC9
RKB
RKK
RC9
RNB
RNK
RF9
RNB
RNK
RF9
8KQ
8KS
—
8NS
—
9KS
—
9NS
—
8A9
8KA
8CC
8B9
8NA
9A9
9KA
9B9
9NA
8KJ
—
8NJ
—
9KJ
—
9NJ
—
—
-40 to +750
(-40 to +399)
DPDT
1
SPDT
1
—
DPDT
1
1
2
1
2
1
2
1
2
SPDT
Series 8
-50 to +750
Hermetically Sealed
(-46 to +399)
Snap Switch
DPDT
Series 9
High Temperature -50 to +750
Hermetically Sealed (-46 to +399)
Snap Switch
SPDT
DPDT
8KP
8LA
8NP
8OA
9KP
9LA
9NP
9OA
8KT
8LJ
8NT
8OJ
9KT
9LJ
9NT
9OJ
8AC
8DC
8BC
8GC
9AC
9DC
9BC
9GC
8NQ
9KQ
9NQ
8FC
9CC
9FC
CS/
CS/
CS/
Process ➄
Cast Iron
Cast Iron
Cast Iron
Aluminum
Aluminum
Temperature Contacts Set ≈ Aluminum
range
Points
Class I, Div 1 Class I, Div 1
Class I, Div 1 Class I, Div 1
Class I, Div 1 Class I, Div 1
NEMA 4X
NEMA 4X
NEMA 4X
°F (°C)
Groups C&D Group B
Groups C&D Group B
Groups C&D Group B
1
R1M
RKM
RKW
R1M
RKM
RKW
SPDT
Series R
2
—
—
-40 to +1000
—
High Temperature
(-40 to +538)
1
RDM
RNM
RNW
RDM
RNM
RNW
Snap Switch
DPDT
2
—
—
1
9AR
9KR
PKV
9AY
9KY
9KW
9AD
9KD
9KV
Series 9
SPDT
2
9BD
9LD
9LV
—
—
High Temperature -50 to +1000
Hermetically Sealed (-46 to +538)
1
9DR
9NR
9NV
9DY
9NY
9NW
9DD
9ND
9NV
DPDT
Snap Switch
2
9ED
9OD
9OV
—
—
Switch
Description
PNEUMATIC SWITCH MECHANISM AND ENCLOSUrE »
Switch
Description
Series J
Bleed Type
Series K
Non-Bleed Type
Maximum
Supply Pressure
Maximum
Process Temperature
Bleed Orifice
Diameter
All Models with Material
of Construction Code 1
All Models w/Material of
Construction Codes 2, 3 or 4
PSIG
Bar
°F
°C
Inches
mm
NEMA 1
NEMA 1
100
60
100
40
7
4
7
3
400
400
400
400
204
204
204
204
0.63
0.94
—
—
1.6
2.3
—
—
JDE
JEE
—
KOG
JDE
JEE
KOE
—
44-602 Side Mounting Liquid Level Controls
23
ASSUrED QUALITy & SErvICE COST LESS
Service Policy
Return Material Procedure
Owners of MAGNETROL controls may request the
return of a control or any part of a control for complete
rebuilding or replacement. They will be rebuilt or
replaced promptly. Controls returned under our service
policy must be returned by Prepaid transportation.
MAGNETROL will repair or replace the control at no
cost to the purchaser (or owner) other than transportation
if:
So that we may efficiently process any materials that are
returned, it is essential that a “Return Material
Authorization” (RMA) number be obtained from the
factory, prior to the material's return. This is available
through MAGNETROL’s local representative or by contacting the factory. Please supply the following information:
1. Returned within the warranty period; and
2. The factory inspection finds the cause of the claim
to be covered under the warranty.
If the trouble is the result of conditions beyond our control; or, is NOT covered by the warranty, there will be
charges for labor and the parts required to rebuild or
replace the equipment.
In some cases it may be expedient to ship replacement
parts; or, in extreme cases a complete new control, to
replace the original equipment before it is returned. If
this is desired, notify the factory of both the model and
serial numbers of the control to be replaced. In such
cases, credit for the materials returned will be determined
on the basis of the applicability of our warranty.
1.
2.
3.
4.
5.
Company Name
Description of Material
Serial Number
Reason for Return
Application
Any unit that was used in a process must be properly
cleaned in accordance with OSHA standards, before it is
returned to the factory.
A Material Safety Data Sheet (MSDS) must accompany
material that was used in any media.
All shipments returned to the factory must be by prepaid
transportation.
All replacements will be shipped F.O.B. factory.
No claims for misapplication, labor, direct or consequential damage will be allowed.
705 Enterprise Street • Aurora, Illinois 60504-8149 • 630-969-4000 • Fax 630-969-9489
[email protected] • www.magnetrol.com
Copyright © 2015 Magnetrol International, Incorporated. All rights reserved. Printed in the USA.
BULLETIN: 44-602.21
EFFECTIvE: January 2015
SUPErSEDES: MAy 2010