LD-Series NEMA 4 Watertight Differential Pressure Switch
The Ashcroft® LD differential pressure switch is designed for applications requiring high reliability, safety and accuracy. Its straight forward design facilitates easy field installation and calibration, making it most suitable for differential pressure control, safety shutdown or alarm operations where 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
- FM, UL, CSA and CE approved
- RoHS Compliant
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
Specifications
Certifications & Approvals
Data Sheets & Instruction Manuals
Drawings & Product/Technical Information
Setpoint
Independent setpoint, 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 4X / IP66
Enclosure Material
Epoxy coated aluminum
Pressure Connection
1/4 NPT Female
1/2 NPT Female
1/4 NPT Female and 1/2 NPT Male Combination
Electrical Termination
¾ NPT Female (STD.)
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)
Contact Ashcroft
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.