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Brass continuous-run unloader valve with half-inch NPT ports

Cdi Control Devices

Cdi Control Devices LGM30-0404AAF Continuous Run Unloader Valve 1/2 in NPT 30 scfm

SKU CH-HWDQ-EF4DC

Continuous-run unloader valve with 1/2 in NPT inlet, 30 scfm flow, adjustable 60–250 psi range, forged brass body

  • Continuous-run design keeps compressor ready for demand
  • 30 scfm maximum airflow supports steady tool operation
  • Adjustable pressure range from 60 to 250 psi fits varied tasks
  • Forged brass body resists corrosion for long service life
  • 1/2 inch NPT inlet and outlet simplify installation

Continuous Run Unloader Valve 1/2 NPT

This continuous run unloader valve fits air compressor systems that require automatic pressure regulation. It handles a maximum air flow of 30 scfm through a 1/2 inch NPT inlet and outlet. The forged brass body suits industrial and automotive workshop environments. Adjustable pressure settings allow tuning between 60 psi and 250 psi operating limits.

Installation Notes 1/2 NPT Connections

Thread the valve directly into the compressor discharge port using the 1/2 inch NPT male inlet. The female outlet accepts standard 1/2 inch NPT fittings for downstream piping. A 3/8 inch exhaust port vents excess air when the unloader activates. Apply thread sealant rated for compressed air to prevent leaks at all connections.

Sustained Operation Forged Brass Body

The forged brass construction resists corrosion during continuous duty cycles up to 250 psi. Minimum preset pressure of 60 psi ensures the compressor unloads reliably without short cycling. Adjustable pressure lets operators match the valve to specific system requirements. The valve maintains consistent performance across the full 30 scfm flow range.

Highlights

  • Continuous-run design keeps compressor ready for demand
  • 30 scfm maximum airflow supports steady tool operation
  • Adjustable pressure range from 60 to 250 psi fits varied tasks
  • Forged brass body resists corrosion for long service life
  • 1/2 inch NPT inlet and outlet simplify installation

Specifications

BrandCONTROL DEVICES

Questions about this item

How can I confirm the valve is operating correctly once installed?

The valve should open at the 60 psi minimum preset pressure and close when pressure reaches the 250 psi maximum, allowing up to 30 scfm flow through the 1/2 in NPT ports.

What components are included and what must I source separately?

The package contains the forged brass continuous run unloader valve with 1/2 in NPT inlet, 1/2 in NPT female outlet and 3/8 in exhaust; fittings, tubing and thread sealant are not supplied.

Which version suits a system needing adjustable pressure up to 250 psi and 30 scfm capacity?

This LGM30-0404AAF model provides adjustable pressure between 60 and 250 psi with a 30 scfm maximum air flow, matching those requirements.

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