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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.
Unit of Measure

Specifications

Brands

 N/A Ashcroft®

Setpoint

 N/A Single Setpoint - Factory Set or Field Adjustable

Enclosure Material

 N/A Epoxy Coated Aluminum

Electrical Termination

 N/A 3/4 in. National Pipe Thread (NPT) Female (Standard) 3/4 x 1/2 in. National Pipe Thread (NPT) Female Reducing Bushing (Optional)

Setpoint Repeatability (Accuracy)

 N/A ± 1% of Span Additional Setpoint Shift of ± 1% of Range per 50 ºF from Initial Setpoint set at 70 ºF Typical

Diaphragm/Actuator Material

 N/A Buna-N® Polytetrafluoroethylene (PTFE) Fluorocarbon (FKM) 316L Stainless Steel Monel®
Ambient Temperature Range1 N/A -20 to 150 ºF-28 to 65 ºC

Enclosure Ratings

 N/A National Electrical Manufacturers Association (NEMA) 4X Ingress Protection (IP66)

Deadband

 N/A Fixed Limited Adjustable

Pressure Ranges

Pressure Ranges

 N/A Vacuum to 3,000 psi

Gauge Function

 N/A Vacuum Pressure

Process Temperature

Process Temperature (Buna-N® or Polytetrafluoroethylene (PTFE) Diaphragm)

 N/A 0 to 150 ºF

Process Temperature (Stainless Steel or Monel® Diaphragm)

 N/A 0 to 300 ºF

Process Temperature (Fluorocarbon (FKM) Diaphragm)

 N/A 20 to 300 ºF

Pressure Connection

Pressure Connection (National Pipe Thread (NPT) Female)

 N/A 1/4 in1/2 in

Pressure Connection (National Pipe Thread (NPT) Male Combination (Optional))

 N/A 1/2 in

Key Features

Key Features

 N/A
  • Special designs for UL fuel and steam limit control
  • Adjustable setpoints from 15% - 100% of range
  • Fixed or limited adjustable deadband
  • Wide selection of switch elements
  • Stainless Steel, Buna-N®, Fluorocarbon (FKM), Polytetrafluoroethylene (PTFE) and Monel® diaphragms available for compatibility
  • Internal setpoint locking screw
  • SIL3 Capable
  • FM, UL, CE, CRN and 3A approved
  • RoHS Compliant

Applications

Applications

 N/A 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
  • 1 All units calibrated at 70 ºF