Enterprise Information
What are the important factors that cause valve damage
Release time:
2017/08/14 21:52
In valve applications, corrosion is the destruction and deterioration of materials under the action of various environments. Because corrosion is one of the important factors leading to valve damage, so Wuhan Xiete Valve Technology Co., Ltd. in the valve manufacturing process, anti-corrosion measures are the primary consideration. Valve corrosion is divided into the following several forms of metal valve corrosion has two forms: uniform corrosion and local corrosion. The rate of uniform corrosion can be evaluated by the annual average corrosion rate. Different parts of the valve are made of different grades of materials, and some parts can be made of less corrosive materials. 1, uniform corrosion uniform corrosion is in the metal
Whether the flow resistance of the stop valve is higher than that of other valves
Release time:
2017/08/10 22:16
Valve stem axis perpendicular to the valve seat sealing surface, stem opening and closing stroke is relatively short, and has a very reliable cut-off action, so this kind of valve is very suitable for cutting off the medium or adjust and throttle use. Valve once in the open state, it is no longer between the valve seat and valve sealing surface contact, so its sealing surface mechanical wear is small, because most of the valve seat and valve is relatively easy to repair or replace the sealing element without the entire valve removed from the pipeline, which for the valve and pipeline welded into one occasion is very applicable. The direction of flow of the medium through such valves has been changed.
The difference between relief valve and relief valve
Release time:
2017/08/09 21:52
Pressure reducing valve is to ensure that the system is not overloaded under the premise of reducing system pressure, pressure reducing valve is generally set in the outlet pressure; relief valve is to prevent system overload, to ensure safety, relief valve is generally only used as low pressure and safety valve. The difference between pressure reducing valve and overflow valve (I) that the pressure reducing valve works actively, while the overflow valve works passively: 1. The pressure reducing valve keeps the pressure at the outlet unchanged, while the overflow valve keeps the pressure at the inlet unchanged; 2. When not working, the inlet and outlet of the pressure reducing valve communicate with each other, while the inlet and outlet of the overflow valve are blocked. 3. When not working, the valve port of the pressure reducing valve is open, while the overflow valve is normally closed, mainly to control the system pressure, can also play the role of unloading. (II) pressure reducing valve is a valve outlet pressure is lower than the inlet pressure of the pressure regulating valve: 1, the pressure reducing valve is mainly used to reduce the pressure of a branch of the hydraulic system, the branch pressure is lower than the main oil pressure and stable, in the set pressure range, the pressure reducing valve is also like the relief valve is closed. However, as the system pressure rises, when the pressure set by the pressure reducing valve is reached, the pressure reducing valve opens and some oil will return to the oil tank through it. The oil pressure of this branch will not rise. It plays the role of decompression and stabilization of this branch! Relief valve is different, it is installed at the outlet of the pump will ensure that the overall pressure of the system is stable and not overpressure. So he has safety, voltage regulation, voltage stabilization and other functions! 2. The pressure reducing valve is generally connected in series on a certain road to reduce pressure and maintain the function of this branch. The overflow valve is generally connected in parallel in the branch of the system to adjust pressure, stabilize pressure and reduce pressure. (III) pressure reducing valve is normally open, through the narrow channel decompression; relief valve is normally closed, only when the system overpressure action. The pressure reducing valve is to reduce the pressure, and the pressure of a certain part of the hydraulic system is reduced. The function of the relief valve is to stabilize the pressure, overflow and overload protection. Use is not the same. So it cannot be replaced. (IV) pressure reducing valve control outlet pressure, relief valve control inlet pressure.
Pneumatic Reversing Valve Fault Explanation and Solutions
Release time:
2017/08/07 21:52
1. reversing insensitive fault 1. Eccentricity in assembly is due to errors in the flatness of the joint surface of the pneumatic reversing valve, which causes the assembly personnel to exert too much force when installing the fastening screws, resulting in deformation of the valve body, thus causing eccentricity of the valve core; 2. Insufficient machining accuracy. The manufacturing accuracy of the valve core and valve hole of the pneumatic reversing valve is relatively high. If the machining accuracy is not enough, the friction will increase, the valve core will make the valve core move unagile and even the valve core stuck; 3, pollutants wedged or bonded in the gap between the valve core and the valve hole, the main pollutants are solid particles, colloidal sludge, rust, etc., these pollutants increased between the valve core and the valve hole
Failure Analysis and Elimination of Flow Control Valve
Release time:
2017/08/04 21:52
1. adjust the throttle valve handle without flow change 1. The pressure compensation valve does not operate. The pressure compensation valve core is stuck in the closed position, the geometric accuracy of the valve core and the valve sleeve is poor, the gap is too small, the spring is bent and deformed laterally, and the valve core is stuck, and the spring is too weak. Elimination method: check the accuracy, repair the gap to meet the requirements, move flexible, replace the spring. 2. Throttle valve failure The oil is too dirty to block the throttle port, the assembly position of the handle and the throttle valve core is inappropriate, the connection on the throttle valve core is lost or the key is not installed, the throttle valve core is stuck due to too small matching clearance or deformation, and the thread of the adjusting rod is blocked by dirt, causing poor adjustment. Elimination method: check the oil quality
Pressure Test Methods and Pressure Test Management Regulations for Three Types of Valves
Release time:
2017/08/02 21:52
Pressure test method of 1. pressure reducing valve ① The strength test of pressure reducing valve can usually be assembled after single piece test or after assembly test. After the bellows is welded with the component, the maximum pressure after the application of the pressure reducing valve is 1.5 times, and the strength test is carried out with air. The sealing test should be carried out according to the actual medium. When testing with air or water, the test shall be carried out at 1.1 times of the nominal pressure; when testing with steam, the maximum working pressure allowed at the working temperature shall be carried out. The difference between inlet pressure and outlet pressure shall not be less than 0.2MPa. The test method is as follows: after the inlet pressure is set, gradually adjust the adjusting screw of the valve in turn to make the outlet pressure
Contact Information
+86 27-8970 8339
Address: No.5, Zhengjie, Shuangliu Street, Xinzhou District, Wuhan City, Hubei Province