Safety valve opening pressure adjustment:

① before the safety gas aluminum valves factory, should one by one to adjust the opening pressure setting value of user requirements. If the user make spring working pressure level, the general should be adjusted lower limit of the pressure level of the factory.
② user before the safety valve is installed on the protected equipment or before installation, you must re-adjusted at the installation site, in order to ensure that the setting pressure relief valve to meet the requirements.
③ spring working pressure level within the range of nameplate by the rotation adjustment screw to change the amount of compression spring can be adjusted to opening pressure.
④ Before the rotation adjustment screw, the Water Heater Gas Valves inlet pressure should be reduced to 90% of the opening pressure of the following, in order to prevent the valve is rotated when the rotation adjustment screw, which damage the sealing surface.
⑤ To ensure accurate opening pressure value, should make adjustments in the medium conditions, such as media type, temperature as close to the actual operating conditions. Media types to change, especially when the media is not the same accumulation of state (for example, from liquid into vapor), the opening pressure changes often. When the temperature increases, the opening pressure is generally decreased. It is adjusted at room temperature and used at high temperatures, the set pressure value at room temperature should be slightly higher than the required opening pressure. To what extent the valve structure and material selection have a relationship should be based according to the manufacturer's instructions.
⑥ conventional back pressure valve for holding additional occasions, when adjusting the opening pressure after the test (in this case the back pressure is atmospheric pressure), the setting value should be opening pressure required minus additional back pressure values.