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

Apollo

Apollo 13211B10 Safety Relief Valve 3/4 in 10 psi Bronze

SKU CH-5APY-PCY8Y

Bronze safety relief valve with a 10 psi factory setting, 5 to 15 psi range, EPDM disc and seat, stainless-steel spring and 383 lb/hr steam capacity

  • Factory-set 10 psi protects low-pressure steam systems
  • Bronze body and EPDM seat resist corrosion up to 250 °F
  • 3/4 in MNPT inlet and FNPT outlet fit standard piping
  • Stainless-steel spring ensures consistent relief across 5 to 15 psi range
  • CRN-listed with test lever for code-compliant installation

Valve for low-pressure steam boilers

This Apollo safety relief valve is designed for low-pressure steam heating and supply boilers. It protects equipment by opening at a factory-set pressure of 10 psi. The pressure range spans 5 to 15 psi. It suits installers and maintenance teams needing reliable overpressure protection.

Bronze body with EPDM disc and seat

The cast bronze body resists corrosion in steam service. Both the disc and seat use EPDM material rated for temperatures up to 250 degrees F. A stainless steel spring provides consistent actuation. An included test lever allows manual verification of valve operation without tools.

3/4 inch NPT connections and CRN compliance

The valve features a 3/4 inch male NPT inlet and a 3/4 inch female NPT outlet. Overall height measures 3 11/16 inches and length is 2 13/16 inches for tight piping layouts. Steam capacity is rated at 383 lb/hr. The CRN marking confirms compliance with Canadian registration requirements. Not for buyers needing higher pressure settings or larger pipe diameters.

Highlights

  • Factory-set 10 psi protects low-pressure steam systems
  • Bronze body and EPDM seat resist corrosion up to 250 °F
  • 3/4 in MNPT inlet and FNPT outlet fit standard piping
  • Stainless-steel spring ensures consistent relief across 5 to 15 psi range
  • CRN-listed with test lever for code-compliant installation

Specifications

BrandAPOLLO VALVES

Questions about this item

How often should the EPDM disc and seat be inspected or replaced on this 10 psi safety relief valve?

The EPDM disc and seat are rated for service up to 250 °F; in low-pressure steam heating boilers they typically require inspection each heating season and replacement if cracking, hardening or leakage appears.

What is the maximum steam capacity this 3/4 in valve can relieve continuously at its 10 psi factory setting?

The valve is rated for a steam capacity of 383 lb/hr at the 10 psi set pressure, which is the limiting flow it can sustain during prolonged over-pressure events.

Does the bronze body and stainless steel spring run hot or add noticeable noise when the valve vents steam all day?

During venting the valve discharges steam at 383 lb/hr, producing audible flow noise and heating the bronze body to near steam temperature; the stainless spring remains within its design range.

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