Tuffy Liquid Level Controls with Pneumatic Switch D E S C R I P T I O N The Pneumatic Tuffy Liquid Level Switch is designed for horizontal mounting in a tank or vessel through threaded or flanged pipe connections. The single pneumatic switch mechanism is used for high or low level alarm or control applications. F E A T U R E S • All 316 SS wetted components • Cage pressures to 2200 psig (151 bar) • NACE and/or ASME B31.3 construction • Specific gravity as low as 0.40 • 2" NPT mounting O P T I O N S • Process temperatures from -40° to +300° F (-40° to +149° C) • Commercially constructed external cage with two 1" NPT top and bottom connections • ANSI flanges T Y P I C A L I N S T A L L A T I O N • NACE or ASME B31.3 external cage with two 1" NPT top and bottom connections available. Consult factory Shut–off Valve 1/4" NPT Air Line Connections Safety Check Valve Pressure Vessel A P P L I C A T I O N S • Sour service (NACE) CL CL Shut–off Valve CL Switch Actuation Level • High/low alarm • Day storage tanks • Clean liquids • Process vessels Drain Valve P R I N C I P L E O F O P E R A T I O N Figures 1 and 2 illustrate the simple Magnetrol operating principle. Switching action is obtained through the use of a magnet which is attached to a float and a switching mechanism. These two basic component assemblies are separated by a non-magnetic, pressure tight barrier Tuffy body (Non-magnetic) Magnet pivot Port B Magnet Pivot Port B Tuffy body (Non-magnetic) Magnet pivot Rising level Float Port A Port A Magnets Spring Spring Valve plunger Valve plunger Pivot Float Falling level Port C Valve body Port C Valve body Pivot arm Figure 1 Low Level Figure 2 High Level 3-way 2-way Port N.O. N.C. Diverter Selector N.O. N.C. A Inlet Exhaust Outlet Inlet Inlet Plug B Exhaust Inlet Outlet Inlet Plug Inlet C Outlet Outlet Inlet Outlet Outlet Outlet D I M E N S I O N A L P N E U M A T I C Pivot arm Note: Orientation of ports may vary from unit to unit. S P E C I F I C A T I O N S S W I T C H M O D E L S 12.00 (304) or 12.94 (329) 8.91 (226) [Sp. Gr. 0.4 Min.] Float Size = 2.00 (51) Dia. x 5.12 (130) Long 7.96 (202) [Sp. Gr. 0.6 Min] Float Size = 2.00 (51) Dia. x 4.57 (116) Long Port B 1/4" NPT 3.00 (76) Max. Nozzle Length Port A 1/4" NPT Switch Actuates Rising Level 3.75 (95) Float .75 Minimum (19) Clearance Falling Level Switch Actuates C L 2.50 (64) Dia. Port C 1/4" NPT 2" NPT Optional accessories (2) 1" NPT 0.56 (14) Dia. Holes [4] on 3.62 (92) B.C. 2" NPT 1.31 (33) 4.50 (114) Dia. 2" NPT 6.40 (163) 1.31 (33) 11.25 ± .12 (286 ± 3) Cage 2 2" NPT 3.50 (89) 3.50 (89) Square Flange Flange Part No. 04-6804-001 Flange Rating: 250 psig @ +400° F (17 bar @ +204° C) ASME Flange (Consult factory when ordering) M O D E L N U M B E R BASIC MODEL NUMBER 039 Tuffy Float Switch SWITCH ACTION 6 Pneumatic HOUSING 316 Stainless steel with 1⁄4" NPT airline connections 0 SPECIFIC GRAVITY AND PRESSURE RATINGS 0 3 9 6 0 0 0 1 0 0.60 minimum S.G., 1500 psi maximum pressure 4 0.40 minimum S.G., 500 psi maximum pressure 0 C H A M B E R P A R T N U M B E R PRESSURE RATING 0 1 2200 psig @ +300° F, 1400 psig @ 750° F 1200 psig @ +300° F, 780 psig @ 750° F MATERIALS OF CONSTRUCTION 1 2 0 3 3 M E C H A N I C A L Pressure: 4 7 4 0 Carbon Steel 316 Stainless Steel 0 S P E C I F I C A T I O N S 0.6 SG 1500 psig at +300° F (103 bar at +149° C) 0.4 SG 500 psig at +300° F (34 bar at +149° C) Process Temperature: -40° to +300° F (-40° to 149° C) Ambient Temperature: Max. 100° F (38° C) with maximum process temperature Pneumatic Switch Supply Pressure: Vacuum to 200 psig (13.8 bar) maximum Maximum Leakage Rate: 0.5 SCFH (0.015 SCMH @ 100 psig (6.9 bar)) Maximum Air Flow: 12.0 SCFH (0.34 SCMH @ 100 psig (6.9 bar)) Specific Gravity: 0.6 minimum or 0.4 minimum Materials of Construction: 316/316L SS wetted components including NACE and ASME B31.3 Housing: 316 stainless steel Cage (optional) Carbon steel or stainless steel * Cage Rating Schedule 80 2200 psig at +300° F (151 bar at +149° C) Schedule 40 1200 psig at +300° F (83 bar at +149° C) * NACE or ASME B31.3 external cage available. Consult factory. 3 D E S C R I P T I O N 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. The Magnetrol 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. D E S C R I P T I O N All Magnetrol electronic level and flow at no cost to the purchaser (or owner) controls are warranted free of defects in materials or workmanship for five full years from the date of original factory shipment. other than transportation. 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 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. Magnetrol shall not be liable for misapplication, labor claims, direct or consequential 5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com 145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306 Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93 Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317 Copyright © 2011 Magnetrol International, Incorporated. All rights reserved. Printed in the USA. Performance specifications are effective with date of issue and are subject to change without notice. Magnetrol & Magnetrol logotype are registered trademarks of Magnetrol International. BULLETIN: 44-109.3 EFFECTIVE: May 2007 SUPERSEDES: June 2003