Check the use of the regulating valve
1. Equipment for regulating valves
1.1 Basic principles of equipment
The equipment of the regulating valve shall comply with the relevant national standards and be strictly implemented in accordance with the planning drawings and planning documents. For example, construction equipment engineering quality inspection and appraisal standards, industrial automation appearance construction and inspection standards, electrical equipment and equipment engineering construction and inspection standards, etc.; equipment, auxiliary equipment and primary materials required for equipment should comply with the relevant provisions of the current national standards.
1.2 Inspection before equipment
The regulating valves and accessories produced by Shanghai Guanhuan Valve Manufacturing Co., Ltd. are subjected to random vibrations caused by transportation tools during transportation and various shocks during loading and unloading, as well as during transportation and storage. Changes in the temperature, humidity, etc. of the environment may change the function of the regulating valve and accessories. Therefore, it is necessary to perform a partial function check in front of the device.
The inspection before the regulating valve equipment mainly includes the following contents: appearance, static characteristics, leakage, no-load full stroke time, pressure resistance, insulation function, air tightness and sealing, etc. The first five items are required items. Of course, there are also certain requirements for the place to be inspected. For example: the ambient temperature is required to be 10 to 35 ° C; the relative humidity of the air is not more than 75%; the field has enough space, and the light is sufficient or there are lighting conditions; there is no strong vibration source and strong magnetic field disturbance around; the power source and the gas source are in accordance with Request and so on.
1.3 Equipment attention matters
For the valve control equipment, it is necessary to ensure safety, ensure the use of functions, easy operation and maintenance, and save equipment costs. Let's talk about the specific issues that need attention when we look at the equipment.
1.3.1 Ensure security
1) Avoid leaking
The equipment process does not allow the regulator valve to leak. In the course of application, if gaps or micropores are formed in the filler culvert, flange gasket, etc., leakage may occur. If the operating conditions of the fluid medium are severe, such as high temperature, high pressure, and corrosive fluid, the damage will be aggravated and the risk of leakage will be greater. There are many ways to avoid leakage. In the process of equipment, the choice of packing, the choice of sealing method, and the selection of a regulating valve with good sealing function are all necessary elements for thinking.
2) Equipment discharge valve
Any pipeline planning and equipment will inevitably accumulate high-pressure fluid during interception. If the potential energy of the accumulated fluid is very large, the equipment should be drained on both sides of the regulating valve, so that after the system is blocked, the regulating valve is in the middle. The energy of the residual high-pressure fluid can be released, the maintenance personnel are safe, and it is beneficial to the repair of the regulating valve. It is also possible to consider the use of a discharge valve that can restrict the flow.
3) Safe pipeline
Before the equipment regulating valve , all the equipment fittings and pipelines should be cleaned, because the sand, scale and iron filings in the pipeline will damage the inside and outside of the regulating valve, especially the strict sealing surface. When the system pressure is severe, it is recommended to buffer the equipment on the pipeline. If the discharged fluid is a harmful gas or liquid, the pipeline for discharging the fluid must be connected to a safe address or be connected to a safe specific container, so that the maintenance personnel can be protected from damage and will not pollute the environment together. .
    With the advancement of science and technology, the regulating valves used to control the flow of fluids in the automation of the production process have been widely used in various occupations. Regarding the thermal and chemical control systems, as the control valve for controlling the quality and safety production indicators of the process medium, it plays an insignificant effect in terms of stable production, optimized operation, maintenance and maintenance cost control. In the operation of the regulating valve, calculation and selection are conditions, equipment and debugging are the key, and application and maintenance are intentions. If the adjustment valve is not properly installed, or the debugging is not good, it will not be able to adjust the effect, and even become a burden on the system.
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