281.491.2331 13839 West Bellfort Street Sugar Land, TX
281.491.2331 13839 West Bellfort Street Sugar Land, TX
Certified
ISO 9001:2015
U.S. Patents
80 + U.S. Patents
Experts
Since 1954
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ISPE

Where to Use

  • Upstream of sensitive pneumatic instruments as a standalone pressure control device or part of a conditioning system on air compressors, generators, and instrumentation panels

  • Upstream of sensitive pneumatic instruments as a standalone pressure control device used in the production, transportation, storage, and utilization of hydrogen (e.g., research institutes and laboratories)

  • Onboard light and heavy-duty industrial and commercial hydrogen fuel cell electric vehicles (FCEVs), such as buses and trucks

Regulate
ISPE

H2IGHS AND LOWS

The ISPE model in Welker’s I-Series Instrument Regulators is a cost-effective, standalone piston-sensing instrument regulator suitable for regulating air and light gases, such as hydrogen.

With global and industrial decarbonization goals, the development and deployment of hydrogen and fuel cell technologies are growing in importance. Welker’s ISPE Instrument Regulator can be used across the hydrogen value chain to reduce the pressure of the hydrogen gas to a lower outlet pressure safe for the downstream equipment in your application, helping prevent costly damage and interruptions to operation.

Data SheetISPE
Piston-Sensing Pressure Control

Sense & Sensibility

Multiple flow coefficients and pressure control ranges let you adapt the ISPE to your instrument and application. The ISPE Instrument Regulators are piston-sensing, allowing for a quicker response to pressure adjustments.

Pressure Control
Adjustable Pressure
Adjustable Outlet Pressure

Set It And Forget It

A square head adjustment screw allows you to quickly and easily set the outlet pressure. With a locknut to prevent the spring setting from changing due to vibration, you can set the ISPE once and be sure the outlet pressure will remain constant.

Compact, Lightweight Construction

On the Weigh Down

The ISPE’s small size, lightweight construction, and flexible port configuration allow it to easily fit into small enclosures and in portable and on-vehicle applications.

Port Configuration

Specifications

ISPE Instrument Regulator
   
Materials of ConstructionBody: Nickel-Plated Aluminum
Piston: Aluminum
Seat: PCTFE
Seals: Viton®
Others Available
Body: Plastic
Piston: Aluminum
Seat: PCTFE
Seals: Viton®
Others Available
Maximum Allowable Inlet Pressure2160 psig (148 barg)500 psig (34 barg)
Temperature Range*32 °F to 392 °F (0 °C to 200 °C)
Others Available
Ports¼" FNPT or SAE Inlet, Outlet, Relief, and Gauge
Flow Coefficient (CV)0.02
0.06
0.10
Pressure Control Ranges0–25 psig (0–1.7 barg)
0–50 psig (0–3.4 barg)
0–100 psig (0–6.8 barg)
0–200 psig (0–13.7 barg)
Weight0.5 lb (0.2 kg)
*Operating at Temperatures Below 32 °F is Not Recommended and Could Result in Major Flow Reduction
*May Vary Based on Seal Material

Note: An upstream filter and downstream relief are required.