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What are the problems that we should pay attention to in the process of putting the pneumatic control valve into operation?


Release time:

2022-03-19

Wuxi Xinming automatic control valve industry to introduce our equipment into operationPneumatic control valveWhat problems should be paid attention to in the process.

What are the problems that we should pay attention to in the process of putting the pneumatic control valve into operation?

Wuxi Xinming automatic control valve industry to introduce our equipment into operationPneumatic control valveWhat problems should be paid attention to in the process.
Pneumatic control valve equipment before the purchase inspection, pneumatic control valve purchase inspection is a very important link to confirm whether the pneumatic control valve arrival condition is satisfied with the planning requirements. Each skill requirement of the pneumatic control valve should reach the planning requirements, but the following items should be focused on during the purchase inspection. The content of valve body/valve trim specification mainly includes: valve type, valve type, nominal diameter, valve seat scale, valve core mode, flow characteristics, leakage grade, valve body raw material, valve core raw material, valve seat raw material, CV value, flange specification grade scale and sealing surface mode, etc. Only if the same content is found to be inconsistent with the planning, the planning shall be determined and approved. In the actuator section, the actuator type, type, effect mode, spring scale and gas supply pressure shall be checked.
       Pneumatic control valveWater pressure test, the water pressure test of the valve body includes the pressure test of the valve body and the leakage test when the valve core is fully closed. Under normal conditions, when the planned pressure exceeds 10MPa pneumatic control valve, the valve body should be subjected to pressure test to check the pressure resistance of the valve body itself and the upper valve cover. Pneumatic control valve pressure test should pay attention to the problem of pneumatic control valve body pressure test selection of manual pressure test pump hydraulic test, prohibit the use of electric pressure test pump. The experimental medium was clean water. Under normal conditions, the valve core of the pneumatic control valve is allowed to have a certain amount of leakage. According to the different leakage levels of the pneumatic control valve, it is generally only required to carry out leakage experiments on the pneumatic control valve with high differential pressure (V and VI leakage). Leakage experiment should pay attention to the problem. The pressure test of the valve body of the pneumatic control valve shall be carried out by manual pressure test pump, and the selection of electric pressure test pump is prohibited (the valve with grade VI leakage shall be carried out by air pressure test). The experimental medium is clean water (clean air is selected for Class VI leakage valves).

 

The monomer adjustment of the pneumatic control valve shall be carried out before the pneumatic control valve of the new equipment. The performance index to be reached in the adjustment: fundamental error: 1.5 return error: 1.5 insensitive area: 0.6 At present, there are many manufacturers of valve and electric valve positioner with different functions. The electric valve positioner tends to be intelligent, and the detailed adjustment methods are different, so I will not repeat them here. In the process of industrial automation equipment appearance, pneumatic control valve equipment and put into operation is very messy, very difficult and very simple problem. In the whole process, the appearance specialty and the pipeline specialty should be harmonious with each other, support each other and cooperate closely with each other. Problems should be reflected and solved in time. They should be operated in strict accordance with the requirements and procedures. Only in this way can the equipment quality and commissioning quality of the pneumatic control valve be ensured smoothly to ensure the smooth progress of the whole equipment project and the smooth commissioning of the whole industrial equipment.

The above is Wuxi Xinming automatic control valve industry to introduce the relevant content.

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