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HT503 (HT577) Pressure & Temperature Relief Valve 15mm - 700 kPa

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HT503 (HT577) Pressure & Temperature Relief Valve 15mm - 700 kPa
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The RMC HT503 or HT577 15mm Pressure and Temperature Relief Valve has a pressure setting of 700kPa. It is designed to guard against over-temperature and over pressure hazards occuring in unvented storage tanks.


The RMC HT503 or HT577 Pressure and Temperature Relief valve ensures that the temperature of the water in a pressurised unvented water heater cannot exceed 99°c in the event that the normal thermostatic controls fail.
Maximum temperature (all models)  99 degrees C

Rated Capacity (AS1357.1): DN15mm - 10 kW
Pressure Setting 700kPa

Model           Width (W)      Height (H)      Outlet (O)
HT55            68mm           98mm             DN15

Body - Cast gunmetal/Brass
Internal Parts - Brass and stainless steel
Seat Disc - Silicon
Pressure Spring - Stainless steel
Piston - Acetal/Brass