` DP Double Bellows Differential Pressure Switch - Alpha Controls & Instrumentation Inc.


DP Double Bellows Differential Pressure Switch

Two opposing bellows combine maximum sensitivity and vibration resistance at a moderate cost

Starting At
$1,854.00 CAD
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 Two opposing bellows combine maximum sensitivity and vibration resistance at a moderate cost in the Series DP Differential Pressure Switches. Both set and reset points are easily adjustable through non-interactive, externally accessible controls. Visible setpoint indicators simplify changes. SPDT snap action switch, 316 stainless steel or brass bellows, flanged steel housing. Rated pressures to 600 psig.

A wide variety of switches and circuit styles enables exactly the specific type of control function needed for any system. Mercury switches are a good choice for humid areas while snap switches are better able to resist vibration. Various operations possible include single adjustment - fixed deadband, double adjustment - adjustable deadband, manual reset (increasing or decreasing pressure) and two stage with each SPST or SPDT switch independently adjustable. Standard enclosure is NEMA-1 style. Optional weatherproof construction is for outdoor use and explosion-proof enclosure meets requirements for Class I, Groups C & D; Class II, Groups E, F & G.

• Bellows switch design provides sensitivity to pressure changes but resists vibration preventing out of range switching
• External access to set and rest controls makes for easy adjustments
• Visible set point indicators simplify changes

Wetted Materials: Brass on ranges 61, 62, 63 or 316SS on ranges 62E, 64E 65E.
Temperature Limits: -10 to 180F (-23 to 82C).
Pressure Limit: Maximum pressure of the operating range.
Enclosure Rating: General purpose, weatherproof or explosion-proof.
Switch Type: Mercury or snap switch, see Ordering Page.
Electrical Rating: See Ordering Page.
Electrical Connection: Screw terminal.
Conduit Connection: General purpose: 1/2" hole for conduit hub. Weatherproof: 1/2" conduit hub. Explosion-proof: 3/4" NPT female.
Process Connection: General purpose and weatherproof: 1/8" NPT female. Explosion-proof: 1/4" NPT male.
Mounting Orientation: Vertical.
Set Point Adjustment: Thumbscrew.
Weight: General purpose: 5 lb (2.3 kg). Weatherproof: 7 lb (3 kg). Explosion-proof: 25 lb (11 kg).
Agency Approvals: cULus.

 • Accurate switch triggers in high pressure applications