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The Ashcroft® D4 differential pressure switch is designed for use on most applications requiring reliability and long-cycle life where monitoring of differential pressure is required. Ideal for satisfying requirements for differential pressure control, shutdown or alarm operations.
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-29 to 65 ºC

Deadband

 N/A Fixed Limited Adjustable

Enclosure Ratings

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

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 Size

 N/A 1/4 in. National Pipe Thread (NPT) Female and 1/2 National Pipe Thread (NPT) Male Combination

Pressure Connection (National Pipe Thread (NPT) Female)

 N/A 1/4 in1/2 in

Pressure Ranges

Pressure Ranges

 N/A 30 inH2O differential thru 600 psid

Key Features

Key Features

 N/A
  • 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
  • Specials designs for NACE applications
  • Internal setpoint lock 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/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