Micro opening external thread safety valve

【The function of micro opening external thread safety valve】
The safety valve plays a protective role in the system. When the system pressure exceeds the specified value, the safety valve opens and releases a portion of the gas/fluid in the system into the atmosphere/pipeline, ensuring that the system pressure does not exceed the allowable value and preventing accidents due to excessive pressure.
【Outline drawing and connection dimensions of micro opening external thread safety valve】

【Adjustment of opening pressure of micro opening external thread safety valve】
① Before the safety valve leaves the factory, its opening pressure should be adjusted one by one to the set value required by the user. If the user requests the working pressure level of the springThen adjust the factory according to the lower limit value of the pressure level as usual.
② Before installing the safety valve onto the protected equipment or before installation, the user must readjust it at the installation site to ensure the set pressure of the safety valveThe value meets the requirements.
③ Within the working pressure range indicated on the nameplate, the opening pressure can be adjusted by rotating the adjusting screw to change the compression of the spring.
④ Before rotating the adjusting screw, the inlet pressure of the valve should be reduced to below 90% of the opening pressure to prevent the valve disc from being driven to rotate when rotating the adjusting screw, which may damage the sealing surface.
⑤ To ensure accurate opening pressure values, the medium conditions during adjustment, such as medium type, temperature, etc., should be as close as possible to the actual operating conditions. When the type of medium changes, especially when the accumulated state of the medium is different (such as from liquid phase to gas phase), the opening pressure often changes. When the working temperature increases, the opening pressure generally decreases. Therefore, when adjusted at room temperature and used for high temperatures, the set pressure value at room temperature should be slightly higher than the required opening pressure value. The degree to which it is related to the valve structure and material selection should be based on Shanghai Zhenggang Valve FactoryThe explanation is based on.
⑥ The conventional safety valve is used to fix the additional back pressure. When the opening pressure is adjusted after inspection (the back pressure is atmospheric pressure at this time）The setting value should be the required opening pressure value minus the additional back pressure value.
【Precautions for installation of micro opening external thread safety valve】
1. All types of safety valves should be installed vertically.
2. The outlet of the safety valve should be unobstructed to avoid pressure.
3. Before installation, safety valves should be specifically tested and their sealing properties checked.
4. Regular inspections should be conducted on safety valves in use

Ordering Notice:

1、 ① Product name and model of micro opening external thread safety valve ② Diameter of micro opening external thread safety valve ③ Does the micro opening external thread safety valve come with accessories for us to correctly select for you.

2、 If the design unit has already selected the model of the positive steel valve micro opening external thread safety valve, please order directly from our sales department according to the micro opening external thread safety valve model.

3、 When the usage situation is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our steel valve experts will review and control them for you.