Non-Adjustable Flow Switches M-61-T Series Fixed setting flow switch with right angle flow and flare fittings Features • For corrosive and non-corrosive liquids or gases • Senses increasing or decreasing flow • Very accurate custom flow settings • Hermetically sealed • All-PTFE switch with flare fittings • Universal mounting available (using PTFE coated spring) Applications The operating principle is based on a free floating magnetic piston which responds only to the motion of fluids within the line, not to static or system pressures. In the presence of fluid flow, controlled movement of the piston actuates an external hermetically sealed reed switch. This switch can be used to actuate audible or visual alarms, as well as relays, or other controls. Custom V ersions A vailable Versions Available Malema welcomes the opportunity to apply its flow sensor experience to work for its customers. Please contact the factory for any special requirements; such as ports, extreme temperature and pressure capabilities, etc. Sample flow monitoring Alarm actuation Purge flows Loss of flow protection Semiconductor etch tools Laser cooling equipment Calibration Range * Air: 300 - 55,000 scc/min Water: 20 - 1600 cc/min * For lower and higher trip points contact factory. Maximum flows through switch are higher. Specifications Set Point Accuracy: Repeatability: Hysteresis: More Product Information To receive additional information about the M-61-T nonadjustable flow switch, please call Malema at 1-800-637-6418. Detailed information can also be downloaded from the company’s web site at http://www.malema.com. ±10% maximum ±2% 15% (lower hysteresis on request) Material Versions * • PTFE * Other materials available on request. Port Sizes • 1/4” Flare • 3/8” Flare Tope Co., Ltd. Tel: (02) 8228-0658 Fax: (02) 8228-0659 http://www.sensor.com.tw 1 Non-Adjustable Flow Switches Operation • • • • • • M-61-T Series Electrical Fixed Flow Setting Information This model is a FIXED flow switch. The flow set point is fixed at the factory and is NOT field adjustable. Proper calibration of the set point requires the following information. When purchasing a flow switch, use the “Set Point Calibration” form on page i-vi or provide this information on the purchase order. • Calibration set point, • Increasing or decreasing flow, • Fluid type (i.e. liquid or gas), • Density or specific gravity, • Viscosity, • System pressure and temperature, • Flow direction (i.e. upward or downward), and • Mounting orientation (i.e. horizontal or vertical). SPST: DC Resistive: 10 Watts, AC Resistive: 10 VA. Switching Current: 0.5A. Carrying Current: 1.2A. DC Resistive: 3 Watts, AC Resistive: 3 VA. Switching Current: 0.25A. Carrying Current: 0.5A. SPDT: Cv at typical set points M -61-T W ater A ir cc/m scc/m Cv 850 30,000 0.43 1595 55,000 0.54 Installation The standard switch MUST be mounted vertically in the position shown. Fluid flow is in the bottom out the top. Switch is available in a universal mounting version (with PTFE coated spring.) Standard Specifications Material Max. Pressure (psi) Max. Temperature (C/0F) PTFE 200 104/220 Wetted Parts Certifications UL and Canadian UL (File E138467) UL and Canadian UL Recognized for use in ordinary locations. CE Compliance Meets the intent of Directive 89/336/EEC for Immunity and Low Voltage Directive 73/23/EEC for Product Safety. PTFE Ordering Information Non-Adjustable Flow Switches Standard Part Numbering Options M - Model - Material Port Switch - Mounting Piston M - 61 - T 2 1 - 0 1 61 PTFE 2 - 1/4" flare 3 - 3/8" flare 1 - SPST N.O. 2 - SPST N.C 3 - SPDT 4 - DS1 (Two SPST) 5 - DS2 (Two SPDT) 0 - Standard (vertical) 1 - Universal mounting (with PTFE coated spring) 1 - PTFE encapsulated - XXX Unique Numbering from 001 to 999 to identify setting and other custom requirement. * The standard piston on the PTFE version is PTFE encapsulated. 2 Malema Flow Sensors • 1060 South Rogers Circle • Boca Raton, Florida 33487 • 1-800-637-6418 561-995-0595 • Fax (561) 995-0622 • http://www.malema.com • © Copyright 1998 • M-60 v 1.0 Non-Adjustable Flow Switches Cut Cut Away Diagrams Non-Adjustable Flow Switches 1/4” flare fitting 3/8” flare fitting malema flow sensors 3 Electrical Dimensional Drawing Illustrated is the M-61 Model with 1/4” flare fitting. Non-Adjustable Flow Switches Illustrated is the M-61 Model with 3/8” flare fitting. 4 Malema Flow Sensors • 1060 South Rogers Circle • Boca Raton, Florida 33487 • 1-800-637-6418 561-995-0595 • Fax (561) 995-0622 • http://www.malema.com • © Copyright 1998 •