The Ashcroft® B4 pressure switch is designed for use in virtually all industrial and OEM applications. Providing reliability and long-cycle life, it is ideal for satisfying requirements for pressure control, shutdown or alarm operations. Special designs are available to meet boiler/burner, NACE and fire-safe applications.
Process Market:
Offshore Oil Rigs
Chemical and Petrochemical Plants
Pulp and Paper Mills
Power Plants
Steel Mills
Water and Sewage Treatment Facilities
Industrial Market:
Pumps, Compressors and Turbines
Boilers and Burners
Degreasers and Evaporators
Recovery Systems
Reverse Osmosis Systems and Filters
Food Processing
Ground Support Equipment
Hydraulic and Lubrication Systems
Heating and Air Conditioning
Marine Equipment
Specialized OEM Equipment
Setpoint
Single setpoint - Factory set or field adjustable
Setpoint Repeatability (Accuracy)
±1% of span (Additional setpoint shift of ±1% of range per 50°F from initial setpoint set at 70°F typical)
Enclosure Ratings
NEMA 4X / IP66
Enclosure Material
Epoxy coated aluminum
Diaphragm/Actuator Material
Buna-N®, Teflon®, Viton®, 316L stainless steel, or Monel®
Pressure Connection
¼ NPT Female (STD.)
½ NPT Female, ¼ NPT Female & ½ NPT Male combo (OPT.)
Electrical Termination
¾ NPT Female (STD.)
3/4 x 1/2 NPT Female reducing bushing (OTP.)
Ambient Temperature Range
–20°F to 150°F (–28°C to 65°C) All units calibrated at 70 °F
Deadband
Fixed or limited adjustable
Pressure Ranges
Vacuum to 3,000 psi
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)
