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Combined Pressure & Temperature Safety Relief Valves

Pressure and temperature relief  valves protects unvented hot water systems against both excess pressure and excess temperature. 

Free pressure setting, testing and certification.

All safety relief valves supplied by Johnson Valves are set to your pressure requirements and issued with a certificate to the relevant standards at no extra cost.

716T – Bailey Birkett Pressure & Temperature Safety Relief Valve

The 716T protects unvented hot water systems, against both excess pressure and excess temperature. Increasing pressure is sensed by the spring, which automatically opens the relief valve at the pre-set pressure and the integral probe independently monitors increases in temperature, safely opening the relief valve. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.

Type
Pressure & Temperature Relief • Side Discharge • Easing Lever
Size & Connections
20mm (3/4″) to 50mm (2″) BSP
Duty
Hot Water
Materials
Bronze Body • DZR Brass Internals • Silicone Trim
Set Pressure Range
2.4 to 10.3 bar
Lift Temperature
Approx. 90°C to 95°C (preset, not adjustable)
Compliance & Approvals
EN14890 • BS6283 • WRAS
Buy 716T – Bailey Birkett Pressure & Temperature Safety Relief Valve716T – Bailey Birkett Pressure & Temperature Safety Relief Valve - PDF DatasheetWRAS Approved Product (EPDM Trim only)Bailey Birkett part of Emerson

716T – Bailey Birkett Pressure & Temperature Safety Relief Valve

500T – Nabic Temperature & Pressure Safety Relief Valve

The 500T pressure & temperature relief valve has been designed for use on unvented hot water supply systems, where protection against excess temperature is required in addition to pressure protection. Pressure and temperature elements of the valve operate independently, thereby providing dual safety protection in the one valve. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.

Type
Pressure & Temperature Relief • Side Discharge • Easing Lever
Size & Connections
DN15 (3/4″ BSP) to DN50 (2 1/2″ BSP)
Duty
Hot Water
Materials
Bronze Body • PTFE Seat Seal (Viton option)
Set Pressure Range
0.4 to 12.5 bar (dependent on size)
Lift Temperature
Approx. 90°C to 95°C (preset, not adjustable)
Compliance & Approvals
BS6283 • BSEN ISO 4126 • WRAS (1 bar and above)
Buy 500T – Temperature & Pressure Safety Relief Valve500T – Temperature & Pressure Safety Relief Valve - PDF DatasheetWRAS Approved Product (EPDM Trim only)Nabic Valves

500T – Temperature & Pressure Safety Relief Valve