ISPE

Compact piston-sensing pressure regulation for air, hydrogen, and light gas applications

The Welker ISPE Instrument Regulator is a cost-effective piston-sensing pressure regulator designed to reduce air, hydrogen, and light gas pressure to a safe outlet pressure for downstream pneumatic instruments and equipment. Suitable as a standalone pressure control device or part of an instrumentation conditioning system, the ISPE supports air compressors, generators, instrumentation panels, hydrogen research, hydrogen production, transportation, storage, and utilization applications. With a compact lightweight design, multiple flow coefficients, multiple pressure control ranges, flexible port configurations, and simple maintenance, the ISPE helps protect sensitive equipment from costly pressure-related damage and interruptions.

Where to Use

Pneumatic Instrument Pressure Control

Upstream of sensitive pneumatic instruments as a standalone regulator or part of a conditioning system.

Air Compressors, Generators, and Instrumentation Panels

Pressure reduction for air and light gas applications where stable outlet pressure helps protect downstream equipment.

Hydrogen Pressure Regulation

Hydrogen production, transportation, storage, utilization, research institute, and laboratory applications requiring safe pressure reduction.

Resources

ISPE IOM ISPE Data Sheet

Piston-Sensing Design

Regulates higher inlet pressures with minimal flow droop for dependable outlet pressure control.

Compact, Lightweight Construction

Fits small enclosures, portable systems, and on-vehicle applications where space and weight matter.

Multiple Flow Coefficients and Pressure Control Ranges

Adapts to different downstream equipment requirements and application conditions.

Flexible Port Configuration

Allows operators to select the accessory arrangement best suited for the installation.

Simple Maintenance

Requires no special tools and helps reduce downtime during service.

	ISPE
Materials of Construction	316/316L Stainless Steel, Aluminum, Nickel-Plated Aluminum, FKM, PCTFE, Plastic
Materials of Construction	Others Available
Maximum Allowable Inlet Pressure	Nickel-Plated Aluminum Body: 2160 psig (148 barg)
Maximum Allowable Inlet Pressure	Plastic Body: 500 psig (34 barg)
Temperature Range*	32 °F to 392 °F (0 °C to 200 °C)
Temperature Range*	Others Available
Ports	¼" FNPT or SAE Inlet, Outlet, Relief, and Gauge
Pressure Control Ranges	0–25 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)
Flow Coefficient (C_v)	0.02
	0.06
	0.10
Weight	Approx. 0.5 lb (0.2 kg)
Features	Aluminum and/or Plastic Body and Trim (Plastic Standard)
Features	Compact Design
Options	(2) Port Configurations
	Nickel-Plated Aluminum Body
	Low, Medium, and High Capacity Options
	Low, Medium, and High Stabilizer Options

ISPE

Where to Use

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