Hydraulic control valve design and selection

Hydraulic control valve is pressure control valve gate, it consists of a main valve and attached catheter, guide valve, needle valve, ball valve and pressure gauge door, etc. Choose in the process of the hydraulic control valve, pay attention to the following: ( 1) Engineering application of the hydraulic control valve is a factory inspection, all kinds of logo is complete, the product technical information to meet the requirements. ( 2) Hydraulic control valves according to the functional requirements, select the type gate valve, then according to the pipeline medium, temperature, building standards and the owner to ask and so on, determining the valve gate valve body and the material of sealing parts. Commonly used valve body materials have cast iron, copper, iron, copper, plastic, etc. Commonly used seal face and lining material have copper alloy, plastic, steel, cemented carbide, rubber, etc. The valve body material should match the piping material. ( 3) The valve door the nominal pressure of 0. 6 and 1. 0 and 1. 6, 2. 5 and 4. Different level, such as 0 mpa pipeline medium, its working pressure should be less than nominal pressure value of the valve gate. ( 4) Engineering of the hydraulic control valve set should have enough space, so that the management, operation, installation and maintenance, and should accord with the requirement of pipe the valve gate. ( 5) Line with the flange connection, the flange connection should be adopted for the hydraulic control valve; Line using the groove connection, the groove connection of the hydraulic control valve should be adopted. ( 6) Hydraulic control valve should be set on the road at the pipe of unidirectional flow medium. ( 7) Hydraulic control valve is the main direction of the arrow on the valve body must be consistent with the piping system flow. ( 8) By hydraulic control valves, gas section should not have air blocking resistance phenomenon. In the aeration pipe network highest position such as deposit should be set up automatic exhaust valve. ( 9) When mounted horizontally, the valve gate valve cover, valve rod should be facing up. Vertical installation, the valve cover, valve rod should be outward. ( 10) The valve door strength and leak test should be obtained before installation. ( 11) The strength of the valve gate and leak test shall meet the following requirements.