Hydraulic Valves Factory introduces that the hydraulic valve is an automatic component operated by pressure oil during use. The entire product will be controlled by the pressure oil of the pressure distribution valve. In the process of use, it is usually combined with an electromagnetic pressure distribution valve. When used in combination, it can be used to remotely control the on-off of oil, gas, and water pipeline systems in hydropower stations. Commonly used in clamping, control, lubrication, and other oil circuits. There are direct-acting and pilot-operated types, and the pilot-operated type is mostly used.
The hydraulic valve is mainly used to control the flow direction of the oil in the hydraulic system or to adjust its pressure and flow, so it can be effectively divided into pressure valves, flow valves, and directional valves. When used, a valve with the same shape can be Because of the different mechanisms of action, they have different functions.
The flow valve and pressure valve of the hydraulic valve use the throttling effect of the flow section to control the pressure and flow of the system, and the directional valve uses the replacement of the flow channel to control the flow direction of the oil. That is to say, although there are various types of hydraulic valves, they still maintain some basic commonalities.
The surface roughness of the valve and flange installed on the hydraulic valve block should reach Ra0.4, and the surface roughness of the sealing surface of the end pipe joint should reach Ra3.2. In addition, the verticality tolerance between the screw hole where the pipe joint is installed and its outer mating surface should be at least grade 8.
All the voids on the valve block of the hydraulic valve should have machining accuracy requirements. Generally, 7H will be selected during use. The machining accuracy of the mounting hole of the threaded cartridge valve should meet the requirements of the product sample. The mounting hole of the cartridge valve The roughness is Ra0.8. In addition, there are also requirements for dimensional tolerance and shape tolerance. The surface roughness of the O-ring groove is Ra3.2, and the surface roughness of the general flow channel is Ra12.5.