GD-Series NEMA 4 Differential Pressure Switch
The AshcroftĀ® GD differential pressure switch is designed for use on tough applications requiring a 316L stainless steel enclosure. The straight forward design allows for easy field installation and access to the microswitches for wiring. Proven technology provides a stable and reliable switch ideal for pressure control, shutdown or alarm operations when two independent set points or adjustable deadbands are required.
Key Features:
- Designed for easy field installation and wiring of microswitches
- Ranges from 30 in. H2O to 400 psid
- Wide selection of switch elements
- Stainless steel, Buna, Viton, Teflon and Monel diaphragms available for compatibility
- Adjustable setpoints from 15%-100% of range
- Fixed or adjustable deadbands
Applications:
Process Market:
Refineries
Chemical and Petrochemical Plants
Pulp and Paper Mills
Power Plants
Steel Mills
Water and Sewage Treatment Facilities
Industrial Market:
Pumps, Compressors and Turbines
Dairies and Breweries
Boilers and Burners
Reverse Osmosis Systems
Filters and Presses
Paint Spraying Equipment
Specialized OEM Equipment
Medical and Life Sciences Market:
Pharmaceutical Plants
Product Information
Specifications
- Setpoint Repeatability (Accuracy)
- ±1% of span (Additional setpoint shift of ±1% of range per 50°F from initial setpoint set at 70°F typical)
- Setpoint
- Independent setpoint, fixed deadband
- Single setpoint, adjustable deadband
- Single setpoint, fixed deadband
- Deadband
- Fixed or adjustable
- Enclosure Ratings
- NEMA 4X / IP66
- Enclosure Material
- Cast aluminum
- Pressure Connection
- ¼ NPT Female (STD.)
- Electrical Termination
- ¾ NPT Female (STD.)
- Diaphragm/Actuator Material
- Buna N, Viton or Teflon
- Pressure Ranges
- 0 - 6 in. H2O to 0 - 150 in. H2O
- Ambient Temperature Range
- -20°F to 180°F (-29°C to 82°C)
Data Sheets:
Instruction Manuals:
Drawings:
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Resources & Tools
Materials Selector
Use the selector to review compatible wetted materials and requirements of your application.
Unit Converter
Need to convert measurement units? Check out our quick and easy tool to convert pressure, temperature and flow units of measure.
Product Information
To learn more about the technical details for options available, review our product information (PI) pages.
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Ashcroft is a trusted source for pressure, temperature, and test instruments around the world. Learn more about how we can help you protect your people, processes, and profits.

