Dwyer

SA1100 Diaphragm Operated Pressure Switches

Weatherproof and explosion-proof, burst pressure protection to 3000 PSI, visible set-point and deadband adjustments

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$558.00 CAD
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The Series SA1100 Diaphragm Operated Pressure Switches are weatherproof and explosion-proof in one economical enclosure. Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 PSI (206 Bar). The rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full-scale. Since many applications require higher deadbands, the SA1100 includes a separate adjustment of this when necessary. A pump being used to control liquid level in a tank would be a typical situation where this feature would be important. Both setpoint and deadband adjustments are protected, yet clearly visible behind a clear polycarbonate window and are fully isolated from the electrical components for additional safety. A 7/16 in open-end wrench is the only tool required to change settings. Terminal blocks are provided for switch wiring connections and both internal and external ground screws are included. Standard housing is weatherproof to NEMA standards 1 through 4X and 13; explosion-proof to NEMA 7, Class I, Groups B, C & D; NEMA 9, Class II, Groups E, F & G. Optional construction adds drain to meet NEMA 3R IP54.

• Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation
• Burst pressure protection prevents device failure where high-pressure surges may damage device costing down-time and repair/replacement
• Adjustable deadband reduces equipment cycling and potential failure
• Visible set-point and deadband adjustments provide an easy and fast check without having to open device causing dangerous conditions to operators
 

Wetted Materials See pressure chamber and diaphragm material in model chart
Temperature Limits -30F - 180F (-35C - 82C) standard.
ATEX compliant at Ambient Temperature -4F - 167F (-20C - 75C);
Process Temperature: -4F - 167F (-20C - 75C)
Pressure Limit 1200 PSIG (82.6 Bar)
Enclosure Rating Weatherproof and Explosion-proof. Listed with UL and CSA for Class I, Groups B, C and D; Class II Groups E, F and G. ATEX Compliant CE 0344 Ex II 2 G EEx d IIC T6 Process Temperature 75C. Weatherproof UL Rated Type 4. Meets NEMA 4X (IP66)
Switch Type SPDT or DPDT snap switch
Electrical Rating See model chart
Electrical Connections Screw terminal
Conduit Connection 3/4 in female NPT
Process Connection 1/2 in female NPT
Mounting Orientation Within 20 of vertical
Set Point Adjustment Internal 7/16 in hex nuts
Weight 3.5 lb (1.6 kg)
Deadband See deadband chart
Agency Approvals ATEX, CE, CSA, UL

• Chemical, petroleum, food and drug processing industries
• Used indoor, outdoor or in explosion-proof area
• Pump control