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Bronze relief valve with test lever, 3/4 NPT connections

Dayton

Dayton 4KHA1 Relief Valve 25 GPM 3/4 NPT

SKU CH-1H3M-26PME MPN 4KHA1

A bronze relief valve rated for 25 GPM flow and 300 psi factory-set pressure protects positive-displacement pumps with a 304 stainless-steel seat and spring, plus an included test lever

  • TypeDrain Components
  • Factory-set 300 psi protects positive-displacement pumps from over-pressure damage
  • 25 GPM flow capacity handles high-volume discharge requirements
  • Bronze body with 304 stainless steel seat and spring resists corrosion
  • Built-in test lever allows quick functional verification
  • 3/4 NPT inlet and outlet fit standard piping connections

Pressure-relief valve for pump protection

The Dayton 4KHA1 is a bronze-bodied relief valve rated at 25 GPM with 3/4 NPT inlet and outlet connections. It opens at a factory-set pressure of 300 psi to prevent damage to positive-displacement pumps. A 304 stainless-steel seat and spring provide corrosion resistance, and a test lever is included for manual verification.

Suitable for hydraulic systems needing

This valve suits installers protecting positive-displacement pumps in industrial or commercial hydraulic circuits where a 25 GPM flow capacity matches the system design. It is not intended for applications requiring an adjustable pressure setting, a higher flow rate than 25 GPM, or a different thread standard than 3/4 NPT.

Factory-set 300 psi opening pressure

The single specification that determines fit is the non-adjustable 300 psi set pressure; the valve will begin to relieve only at this value. Confirm that the system design calls for exactly 300 psi relief before selecting this model.

Highlights

  • Factory-set 300 psi protects positive-displacement pumps from over-pressure damage
  • 25 GPM flow capacity handles high-volume discharge requirements
  • Bronze body with 304 stainless steel seat and spring resists corrosion
  • Built-in test lever allows quick functional verification
  • 3/4 NPT inlet and outlet fit standard piping connections

Specifications

TypeDrain Components
BrandDayton
Model4KHA1

Questions about this item

Should I choose this 25 GPM relief valve or a different capacity for my pump?

Select the 25 GPM model when your positive displacement pump delivers up to 25 gallons per minute; a higher capacity valve would not open at the correct flow, while a lower one could restrict output.

What does the 300 psi factory set pressure mean once the valve is installed?

The valve will begin to open at 300 psi, protecting the pump from over-pressure by discharging excess fluid until system pressure drops below that level.

How does the 3/4 NPT connection affect installation and flow?

The 3/4 NPT inlet and outlet mate with standard 3/4 inch NPT pipe threads, allowing direct installation without adapters and supporting the rated 25 GPM flow capacity.

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