Description

Series SA1100 Diaphragm Operated Pressure Switches, Visible Setpoint, Adjustable

Deadband, Hermetically Sealed Snap Switch, Weatherproof and Explosion-proof

 

The DWYER 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). DWYER Series SA1100 Diaphragm Operated Pressure Switches rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full-scale.

Product Applications

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

 

Features

• 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

 

Specifications

• Wetted Materials: See pressure chamber and diaphragm material in model chart.
• Temperature Limits: -30 to 180°F (-35 to 82°C) standard. ATEX compliant at Ambient Temperature -4 to 167°F (-20 to 75°C); Process Temperature -4 to 167°F (-20 to 75°C).
• 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 2813 II 2 G Ex d IIC T6 Gb Process Temperature 75°C. Weatherproof UL Rated Type 4. Meets NEMA 4X (IP66). EC-Type Certificate KEMA 04ATEX2186 X ATEX Standards: EN 60079-0:2009; EN 60079-1:2007 IECEx Certified for Ex d IIC T6 Gb IEC Standards: IEC 60079-0:2007; IEC 60079-1:2007 IECEx Certificate of Conformity: IECEx DEK 11.0095X
• Switch Type: SPDT or DPDT snap switch.
• Electrical Rating: See model chart.
• Electrical Connections: Screw terminal.
• Conduit Connection: 3/4″ female NPT.
• Process Connection: 1/2″ female NPT.
• Mounting Orientation: Within 20° of vertical.
• Set Point Adjustment: Internal 7/16″ hex nuts.
• Weight: 3.5 lb (1.6 kg).
• Deadband: See deadband chart.
• Agency Approvals: ATEX, CE, CSA, UL.
• *Options that do not have ATEX.

 

Models & Ordering

Aluminum

Model	Description
SA1111E-A4-K1	Diaphragm operated pressure switch, 1/4″ NPT(F) Process Connection, Buna-N Diaphragm and O-ring.

 

316 SS

Model	Description
SA1111E-S5-K2	Diaphragm operated pressure switch, 1/2″ NPT(F) Process Connection, Fluorocarbon Diaphragm and 0-ring.