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Stainless steel safety valve with test lever, three-quarter by one inch NPT threads

Apollo

Apollo 541DDBKMAA0150 POP Safety Valve 3/4 x 1 In 150 psi SS accessory

SKU CH-8DWT-QC6X7

Stainless-steel pop safety valve with 3/4 in MNPT inlet, 1 in FNPT outlet and 150 psig factory setting

  • Stainless-steel body resists corrosion in harsh environments
  • Factory-set 150 psig provides immediate over-pressure protection
  • Adjustable 15 to 1200 psi range suits varied system demands
  • 316 stainless disc and spring ensure reliable sealing at temperature extremes
  • CF8M, CRN and NSF listings confirm code compliance

Apollo POP Safety Valve 150 psi

The Apollo 541DDBKMAA0150 is a stainless-steel POP safety relief valve with a 3/4-inch MNPT inlet and a 1-inch FNPT outlet. It is factory set at 150 psig and built to CF8M (1.4408) standards with CRN and NSF listings for pressure-system protection.

Suited for over-pressure relief on steam.

Installers needing a corrosion-resistant valve with a wide 15 to 1200 psi adjustable range and a test lever for manual verification will find this model appropriate. It is not intended for systems that require a smaller outlet connection or a lower factory pressure setting.

Handles temperatures from -320 to 800 degrees F

The 316 stainless-steel disc and metal seat provide reliable seating across the full temperature span, while the stainless-steel spring maintains consistent force. Capacity diminishes when inlet piping restricts flow below the valve's rated discharge area or when back-pressure exceeds design limits.

Highlights

  • Stainless-steel body resists corrosion in harsh environments
  • Factory-set 150 psig provides immediate over-pressure protection
  • Adjustable 15 to 1200 psi range suits varied system demands
  • 316 stainless disc and spring ensure reliable sealing at temperature extremes
  • CF8M, CRN and NSF listings confirm code compliance

Specifications

BrandAPOLLO VALVES

Questions about this item

What size male NPT inlet and female NPT outlet must my piping already provide for the 541DDBKMAA0150 valve?

The valve requires a 3/4 in MNPT inlet and a 1 in FNPT outlet on the existing pipework.

Will the stainless steel body and 316 disc withstand the same temperature extremes as my older bronze relief valves?

Yes, the CF8M stainless body and 316 disc are rated from -320 °F to 800 °F, covering a wider range than typical bronze valves.

How can I verify the valve opens at the factory-set 150 psig after installation?

Lift the included test lever; the valve should discharge at 150 psig and reseat when the lever is released.

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