How to adjust the pressure relief valve to open
2015-11-14 by bridge
① before the gas stove safety valve factory, should one by one to adjust the opening pressure setting value of user requirements. If the user made spring working pressure level, press in general should adjust the pressure level of the lower limit of the factory.
② user before the gas cooker safety valve is installed on the protected equipment or before the installation, you must re-adjustment 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 springs can be adjusted to opening pressure.
④ Before the rotation adjustment screw, the valve inlet pressure should be reduced to 90% below the opening pressure, 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 and 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 operating temperature increases, the opening pressure is generally decreased. It is at room temperature adjustment for high temperatures, the set pressure value at room temperature should be slightly higher than the required opening pressure value. 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 after adjusting the opening pressure test (in this case the back pressure is atmospheric pressure), the setting value should be opening pressure required minus additional backpressure value.