The Ashcroft® P-series NEMA 7/9 differential pressure switch was designed for use in hazardous applications where uncompromising protection is required. This switch combines field-proven technology, stability and long cycle life. Its rugged explosion proof housing makes it ideal for satisfying differential pressure control, shutdown or alarm operations in hazardous locations. When two independent setpoints or adjustable deadbands are required.
Process Market:
Refineries
Chemical and Petrochemical Plants
Water and Sewage Treatment Facilities
Steel Mills
Industrial Market:
Pumps, Compressors and Turbines
Boilers and Burners
Reverse Osmosis Systems
Setpoint
Dual independent setpoints, fixed deadband
Single setpoint, adjustable deadband
Single setpoint, fixed deadband
Setpoint Repeatability (Accuracy)
±1% of span (Additional setpoint shift of ±1% of range per 50°F from initial setpoint set at 70°F typical)
Deadband
Fixed or adjustable
Enclosure Ratings
NEMA 7/9, IP66
Enclosure Material
Epoxy coated aluminum
Pressure Connection
1/4 NPT Female and 1/2 NPT Male Combination
1/4 NPT Female, 1/2 NPT Female,
Electrical Termination
¾ NPT Female (STD.)
3/4 x 1/2 NPT Female reducing bushing (OTP.)
Diaphragm/Actuator Material
Buna-N®, Teflon®, Viton®, 316L stainless steel, or Monel®
Pressure Ranges
30 in H2O differential thru 400 psid
Ambient Temperature Range
-20°F to 150°F (-29°C to 65°C)
Process Temperature
0°F to 150°F (Buna N or Teflon diaphragm)
0°F to 300°F (Stainless steel or Monel diaphragm)
20°F to 300°F (Viton diaphragm)
