Ashcroft DDS Pressure Switch

Rugged pressure switch designed to sense low differential pressures between high pressure sources.

Features

  • Differential pressure ranges: 6 to 150 inH2O
  • ±1.00% fs accuracy
  • Available pressure units: inH2O, mmH2O, kPa, mBar
  • High static pressure capability up to 1500 psi
  • Field-adjustable setpoint; fixed deadband
  • Rugged NEMA 4X aluminum enclosure
  • Watertight or explosion proof versions
  • Class 1, Div 1, Groups C & D, SPDT or DPDT setpoints
  • 1/4 NPT Female pressure connection

The Ascroft DDS Series differential pressure switch is designed to sense low differential pressures between high pressure sources. The high pressure seals are opposed stainless steel bellows assemblies, while the differential pressure is sensed by a diaphragm clamped between these bellows assemblies. The diaphragm has a large area to accurately sense low differential pressure, and during an over-pressure the diaphragm is fully supported. This DDS is ideally suited for pressure level sensing, filter monitoring, and pressure control.

The DDS design is symmetric so that both the high or low pressure sides of the element can withstand the maximum pressure with the opposite side at atmospheric pressure. The rugged cast aluminum housing incorporates a "frictionless" switching mechanism, and can be specified as watertight or explosion proof. The housing is large enough to accommodate up to one full size SPDT or one DPDT electric switches.

The standard differential pressure sensing element is constructed of a strong aluminum alloy using a Buna N elastomer diaphragm. Other diaphragm and wetted area materials are available.

Ashcroft 80 Wafer Isolation Rings
Ashcroft 80 Wafer Isolation Rings

360 degree sensing flexible inner-liner, no process deadleg, 2 to 20in nominal pipe size.

Starting at $429.32
Ashcroft V01 Gauge Valve
Ashcroft V01 Gauge Valve

Isolates process from instrument assembly, 316L stainless steel construction, 6,000 psi max pressure.

Starting at $118.34
Ashcroft V01 Block and Bleed 2-Valve Manifold
Ashcroft V01 Block and Bleed 2-Valve Manifold

Isolates and bleeds the process from instrument assembly, 316L stainless steel construction.

Some Models in Stock
Starting at $155.72
Ashcroft V02 Block and Bleed 2-Valve Manifold
Ashcroft V02 Block and Bleed 2-Valve Manifold

Isolates and bleeds the process from instrument assembly, 316L stainless steel construction.

Starting at $247.91
Ashcroft V01 3 Valve Manifold
Ashcroft V01 3 Valve Manifold

Isolates each port and equalize pressure for instrument maintenance, 316L stainless steel construction.

Starting at $218.01
Ashcroft 81 Bolt Thru Isolation Ring
Ashcroft 81 Bolt Thru Isolation Ring

Low-maintenance protection for gauges, switches and transducers from contact with process media, for 1 to 10-inch pipe sizes.

Starting at $767.54
Ashcroft V01 5 Valve Manifold
Ashcroft V01 5 Valve Manifold

Isolate and bleed the process for each port as well as equalize pressure for instrument maintenance.

Starting at $311.45
Ashcroft V02 Direct & Remote Mount Three-Valve Manifolds
Ashcroft V02 Direct & Remote Mount Three-Valve Manifolds

Isolates each port and equalizes pressure for instrument maintenance, 316L stainless steel construction.

Starting at $323.91
Ashcroft V03 3 Valve Manifold
Ashcroft V03 3 Valve Manifold

3-valve manifolds isolate each port and equalize pressure for instrument maintenance.

Starting at $225.17
Ashcroft 82 Threaded Isolation Ring
Ashcroft 82 Threaded Isolation Ring

Barrel-style isolation device used on threaded piping systems to protect measuring instruments from contact with process media.

Starting at $408.27
Ashcroft V02 Direct & Remote Mount 5 Valve Manifold
Ashcroft V02 Direct & Remote Mount 5 Valve Manifold

5-valve manifolds isolate and bleed the process for each port as well as equalize pressure for instrument maintenance.

Starting at $604.14
Ashcroft V02 Low Pressure Ball Valve
Ashcroft V02 Low Pressure Ball Valve

Floating ball design provides bi-directional isolation, anti-blowout stem design, 1000 psi max pressure rating.

Starting at $56.05
Ashcroft V02 High Pressure Ball Valve
Ashcroft V02 High Pressure Ball Valve

Floating ball design provides bi-directional isolation, anti-blowout stem design, 6092 psi max pressure.

Starting at $386.19