Depending on the type of gas used and individual customer requirements, various sealing materials and elastomers are available to ensure the safety of your systems under even the most difficult conditions.

Pressure valve

1st Choice Hot Water have very dedicated and highly trained technicians ready to repair, service and install any water heater system. Each technician has received training from the manufacturer and are fully licenced. With a response time second to none, and a large selection of spare parts on board, 1st Choice Hot Water will get your hot water running to its full capacity very quickly. We also have very competitive hot water system prices.

Rupture disc

Smart Safety Relief Valve, Stainless Steel, for venting excess pressure, 0.5 to 45 bar, display of status „open“ or „closed“

1. Partially drain the water heater (refer to “Draining the Water Heater” on page 29). 2. Remove the drain line from the T&PR valve. 3. Unscrew the T&PR valve and remove. 4. Confirm the replacement T&PR valve is the correct rating and refit using thread tape. 5. Refit the drain line.

6. Close the hot tap and restore water supply. 7. Check T&PR valve thread for leaks. 8. Operate the T&PR valve lever to reset relief drain. 9. Purge air from the system through hot taps. 10.Restore the power supply to the water heater.

Checkvalve

WITT is a manufacturer of safety relief valves or pressure relief valves. Safety relief valves respectively pressure relief valves or pressure safety valves are designed to protect against overpressure by discharging pressurised gases and vapours from pipelines, pressure vessels and plant components. Safety relief valves are often the last line of defence against explosion – and such an explosion could be fatal. Other common names for safety relief valves are pressure relief valve, safety valve, or blow-off valve.

Safety Relief Valve, stainless steel, for venting excess pressure from receivers, pipelines and other equipment, 5 up to 500 mbar

Solenoidvalve

Safety Relief Valve for venting excess pressure from receivers, pipelines and other equipment, 5 up to 500 mbar, G 1/2 or 1/2" NPT threads

For maximum safety, WITT undertakes 100 % testing of each safety relief valve before it is delivered. In addition, WITT offers individual testing of each safety valve by the TÜV, with their certificate as proof of the correct set pressure.

WITT is a manufacturer of safety relief valves or pressure relief valves. Safety relief valves respectively pressure relief valves or pressure safety valves are designed to protect against overpressure by discharging pressurised gases (e.g. acetylene, ammonia, argon, CO2, helium, carbon monoxide, methane, propane, oxygen, nitrogen, hydrogen and compressed air) and vapours from pipelines, pressure vessels and plant components. Safety relief valves are often the last line of defence against explosion – and such an explosion could be fatal. Other common names for safety relief valves are pressure relief valve, safety valve, or blow-off valve.

pressure reliefvalve中文

Safety Relief Valve, stainless steel, for venting excess pressure from receivers, pipelines and other equipment, 5 up to 500 mbar

Safety Relief Valve for venting excess pressure from receivers, pipelines and other equipment, 5 up to 500 mbar, G 1/8 or 1/8" NPT threads

Pressureregulator

Safety Relief Valve, aluminium, for venting excess pressure from receivers, pipelines and other equipment, 5 up to 500 mbar

Safety Relief Valve for venting excess pressure from receivers, pipelines and other equipment, 5 up to 500 mbar, G 1/8 or 1/8" NPT threads

Never fit a T&PR valve with a rating higher than that indicated on the water heater rating plate. Do not use reconditioned T&PR valves.

PRVvalve

WITT safety relief valves are available with different connections. In addition to the standard versions with the usual internal or external threads, special versions with KF or CF flanges, VCR or UNF threads can also be ordered. Special adapters for connecting the safety valve to a blow-off line are also available.

Safety relief valves are used in numerous industries and industrial applications where, for example, gases pass through pipelines or where special process vessels have to be filled with gas at a certain pressure.

Safety valves

Pressure and Temperature Relief Valves are designed to relieve excess pressure caused by water expansion, which may develop during the normal heating cycle.

WITT safety relief valves are direct-acting, spring-loaded valves. When the preset opening pressure is reached, a spring-loaded element in the valve gives way and opens, and the pressure is relieved. One the pressures are equalised, the valve closes automatically and can be reactivated any time the pressure rises again. Depending on the application and the nature of the gas, the safety relief valves can either discharge to atmosphere, or via a connected blow-off line. The opening pressure of the safety valves is preset by WITT at the factory according to the customer’s requirements.

For most industrial applications using technical gases, brass is usually the standard material of construction of the safety relief valve body/housing. For the use of safety relief valves with aggressive and corrosive gases, the housings are made of high-quality stainless steel (1.4541/AISI 321, 1.4404/AISI 316L, 1.4305/AISI 303 or 1.4571/AISI 316Ti). The use of aluminium as a housing material is also possible.

Safety Relief Valve for venting excess pressure from receivers, pipelines and other equipment, 5 up to 500 mbar, G 1/2 or 1/2" NPT threads

Safety Relief Valve, stainless steel, for venting excess pressure from receivers, pipelines and other equipment, 0.5 to 45 bar

WITT safety valves are very precise. They are individually preset to open at a predetermined pressure within the range 5 mbar to 45 bar. Their small size and orientation-independent installation allow a wide range of connection options. WITT safety valves also stand out due to their high blow-off flow rates of up to 970m³/h. They can be used within a temperature range of -60° C to +270°C.