PISTON TYPE FS-150 Series - Straight Flow Path with Low Pressure Drop Flow Rate Settings: Liquids: 0.5 GPM to 5 GPM Port Size: 1/2 NPT Primary Construction Material: Polypropylene Setting Type: Fixed These slim, inline switches reduce pressure drop to a minimum. They incorporate a unique, dual-diameter, internal bore and piston configuration to minimize flow constriction. Liquids are able to smoothly pass around the piston and flow through the switch with little pressure loss to the down stream line. Specifications Polypropylene, Hydrolytically Stable, Glass Reinforced Piston Ryton(R) -R4, 316 Stainless Steel O-Ring Viton(R) Spring 316 Stainless Steel Dimensions Operating Pressure, Maximum 200 PSIG (13.8 bar) @+70F to +150F (+21.1C to 65.5C) 150 PSIG (10.3 bar) @+150F to +212F (+65.5C to +100C) Operating Temperature 0F to 212F (-17.8C to +100C) Set Point Accuracy 15% 1-1/16" (26.9 mm) HEX 1/2" NPT 1/4" (6.3 mm) QUICK CONNECT TERMINALS Set Point Differential 20% Maximum Switch* SPST, 20 VA Inlet/Outlet Ports 1/2 NPT Male Electrical Termination 1/4 Male Quick Connect Terminals (2) 7/8" (22.2 mm) DIA. REF. 5-29/32" (139.7 mm) REF. *See "Electrical Data" on Page X-5 for more information. How To Order - Standard Models 1/2" NPT Specify Part Number based on flow setting and switch operation. 2-5/32" (54.8 mm) REF. Part Numbers Flow Settings GPM Normally Open @ No Flow Normally Closed @ No Flow 0.5 129660 129666 1.0 129661 129667 2.0 129662 129668 3.0 129663 129669 4.0 129664 129670 5.0 129665 129671 1-13/64" (30.5 mm) REF. 1-5/16" (33.3 mm) HEX Note: Cable output available. Please consult factory. Pressure Drop - Typical 5 PRESSURE DROP (PSID) Notes: 1. Flow settings are calibrated using water @ +70F on increasing flow, with units in a horizontal position (terminals up). 2. Care should be taken by specifiers to ensure fluid compatibility with the above listed wetted materials. 3. Use of 150 micron filtration is recommended. - Stock Items. 1-3/8" (34.9 mm) REF. FLOW SWITCHES Wetted Materials Housing Patent # 4.996.396 U.L. RECOGNIZED -- FILE NO. E31926 CSA Listed -- File No. LR30200 4 Part No. 129663 3 Part No. 129664 2 Part No. 129665 Part No. 129660 Part No. 129661 Part No. 129662 1 0 3 4 5 6 7 FLOW RATE - GPM Tests conducted with units in a horizontal position with water at +70F (21C). Data will vary slightly for vertically mounted units. 0 Visit www.GemsSensors.com for most current information. 1 2 G-5