Adjustment method of regulating valve
Release time:
2024-10-22 16:19
The standard products produced by the regulating valve generally adjust the spring within the range of the standard assembly, that is, the starting pressure Pi of the spring, and the deformation of the spring in the full stroke range Pr, and if the regulator is used to control the full stroke, there is no output force. Therefore, the regulating valve should be adjusted in the equipment to satisfy the process requirements. Some use factory, because of the lack of adjustment of common sense, improper adjustment, so that the valve can not be closed, can not open, so introduce the adjustment method.
The unbalance force formula F = π/4(dg2 △P dsP?) of the pneumatic diaphragm adjustment cut-off valve from the pneumatic control valve it can be seen that when the pressure difference △P at both ends of the regulating valve is large, its unbalanced force F↑ also increases. When the output force of the actuator is less than the unbalanced force, it cannot control the due stroke in the full stroke range. Therefore, when the output force of the actuator is fixed, it should be limited to work under a certain pressure difference. This pressure difference limit is called allowable pressure difference (△P).
If the actual pressure difference exceeds the allowable pressure difference of the regulating valve assembled according to the standard, and its exceeding value is within a certain range, the preload of the compression spring can be changed to achieve the purpose of further improving the allowable pressure difference. This adjustment can be carried out according to the process conditions before the equipment. According to the effect of the accounting, the range of the spring can be adjusted by changing the preload of the spring through the adjusting member, and then the equipment can be adjusted to the process position number. This not only saves the time of adjusting the equipment, but also ensures the process requirements.
2022-12-19
Wuhan Weituo Fluid Control Equipment Co., Ltd
Address: 1706, Building D, Wuhan Living Room, No.8 Hongtu Avenue, Dongxihu District, Wuhan City
Telephone:0086-18942929031 0086-18571829295
Landline:0086-027-83612831
Fax: 0086-027-83612830
E-mail:watosong@watovalve.com
Website:www.watovalve.com
