Proportional valve failure causes and solutions
(1) Proportional electromagnet failure (1) The proportional electromagnet can not work (can not pass current) due to aging of plug socket [base], poor contact and desoldering of electromagnet. Meter testing can be used at this time, found infinite resistance, you can re-weld the wire, repair the socket and plug the socket. ② line 圑 component failure coil aging, burning wire,, the coil inside the coil and the coil temperature rise is too large and so on. Coil temperature rise caused by the...
The difference between safety valve, pressure regulator valve, pressure reducing valve and pressure relief valve
Safety valves, pressure reducing valves, pressure regulating valves, and pressure relief valves are all pressure valves, which are mainly functional differences. The safety valve is used to prevent the damage of the boiler, pressure vessel and other equipment or pipelines due to overpressure. When the pressure is slightly higher than the normal working pressure, the safety valve is automatically opened to lower the pressure. When the pressure is slightly lower than the normal working pressure,...
XCMG's first full-variable electro-hydraulic proportional loader opens new smart manufacturing journey
Recently, the first LW600KVM type III large-capacity variable-capacity electro-hydraulic proportional loader of the Xugong Scraper Machinery Division successfully went offline. This marks the creative breakthrough of the XCMG loader in the field of intelligent control and opens a new journey for the XCMG intelligent loader. XCMG's first full-variable electro-hydraulic proportional loader opens new smart manufacturing journey The XCMG LW600KVM III loader is equipped with a new full-variable...
Manual proportional multi-way valve profile
Manual proportional multi-way valve manual proportional valve, the maximum flow 800L / min maximum pressure 430bar, suitable for engineering machinery, mining, metallurgy, shipbuilding, pharmaceutical and other industries, is a pressure-sensitive load-sensing ratio of multi-way Valve, the maximum working pressure 420bar, single-chip maximum flow of 380l / min. It uses a unified, modular design as a whole, providing a reliable system solution for the manufacturer of construction vehicles. Users...
Valve introduced solenoid valve, solenoid valve type, maintenance, maintenance, repair
First, the fluid in the applicability pipeline must be consistent with the media in the selected solenoid valve series model. Control Valve, Flow Control Valve, Hydraulic Control Valve, Proportional Directional Control Valve The temperature of the fluid must be less than the calibrated temperature of the selected solenoid valve. Solenoid valves allow the viscosity of liquids to be generally below 20CST, and should be indicated when more than 20CST. Working pressure difference, the maximum...
Application of proportional control valve in metal smelting
At present, the development of metal smelting in China is constantly improving. The application of valves in the process is indispensable. The proportional control valve is a kind of valve, but this valve does play a very important role in the process of metal smelting. The proportional adjustment control valve is realized by controlling the flow rate in the valve body. The prebaked anode paste used in the metal smelting is produced by the raw anode workshop. In the production of the carbon...
Proportional pressure reducing valve features introduced
Proportional pressure reducing valve, beautiful appearance, reliable quality, accurate, steady work, both under pressure and anti-static pressure. The valve utilizes the pressure difference generated by the different carrying area of the piston inside the valve body to change the pressure after the valve to achieve the purpose of reducing pressure. Decompression ratio proportional valve is: 2: 1, 3: 1, 4: 1, 3: 2, 5: 2, etc., can also be designed according to the requirements of a special...
hydraulic butterfly valve and pneumatic ball valve | Pneumatic butterfly valve ball valve_Shanghai Zhongding Valve
Hydraulic butterfly valve is a kind of valve that uses disc-type opening and closing parts to reciprocate to rotate about 90 ° to open, close and adjust the fluid channel. The pneumatic ball valve uses the ball to rotate 90 ° around the axis of the valve stem to achieve the purpose of opening and closing. feature: Control Valve, Flow Control Valve, Hydraulic Control Valve, Proportional Directional Control Valve 1. Hydraulic ball valves are mainly used to cut off, distribute and change the...
China valve research and development of low temperature valve pilot valve new era
China Valve Holdings Limited announced today that the production of supercritical valves for thermal power plants has been approved and that cryogenic valves have been successfully developed. The company is in the forefront of high-end metal valve manufacturing, with subsidiaries such as Henan Kaifeng High Pressure Valve Co., Ltd. and Henan Zhengzhou Butterfly Valve Co., Ltd. In addition, China Valve Holdings Co., Ltd. has appointed Wang Zhiming as the head of the R&D department. Wang...
High-end light trucks equipped with load sensing valves or will be the mainstream models in the light truck market
In recent years, with the development of society and economy and the increase in standards for car use by enterprises, high-end light trucks have gradually become the focus of competition among major light truck companies, and the market has grown rapidly. At present, no less than six companies have set foot in or are planning to enter high-end light trucks. At present, China's light trucks have completed the requirements for the emission of State III, and they are now advancing toward the...
What is a proportional valve?
What is a proportional valve? The so-called proportional valve is a kind of according to the input signal continuously and proportionally control the hydraulic system pressure and flow valve. Control valves commonly used in hydraulic systems are often of a switch-controlled nature. Their function is to allow a hydraulic element to be connected to or disconnected from the hydraulic system, or to perform simple oil circuit switching, etc., without continuous control. Servo valves must be used if...
Introduction of load sensing shuttle valve
The load-sensing shuttle valve loads the load pressure of each working valve plate to the pressure compensated bypass relief valve of the inlet valve block. Two-way pressure compensation set differential pressure relief valve: When more than one working piece valve work, the load pressure to the spring side of the valve. At this point, the negative feedback through the valve heart, to automatically adjust the throttle port pressure across the mouth, so that it remains basically unchanged. Under...
Load Sensing Pressure Compensation Multi-Way Valve Technical Introduction
The invention of load sensing pressure compensation multi-way valve is a product of the development of modern hydraulic technology. The invention is a stackable modern multi-channel control element with load sensing pressure compensation. By comparing the sensing slippery (compensating slippery) pressure difference between the upper and lower cavity ΔP keep constant principle, stepless adjustment of work flow. In changing load conditions, choose any point of travel, have achieved a constant...
Detailed relationship between proportional band and proportional control (P) output
Proportional control TITLE: Proportional control action Proportional control (P) is one of the simplest ways to control. The output of its controller is proportional to the input error signal. Depending on the equipment, the proportional band is generally 2 to 10% (temperature control). However, only the P control will produce the off set (steady state error) mentioned below, so the integral control (I) is generally added to eliminate the steady state error. The relationship between the...
Hardness analysis of load-sensing pure pressure fluid commutation program
The stiffness analysis of the system influences the presence of the interference force F on the output y. The output displacement caused by the unit load disturbance is called the positional flexibility, the reciprocal of the positional flexibility is called the positional stiffness, and the positional stiffness is further divided into the dynamic positional stiffness and Static position stiffness. The dynamic position stiffness is the stiffness in the dynamic process, which is related to the...
Load sensing pressure compensation multi - way valve application
one. Summary Multi-way directional control valve is the central control element of traveling mechanical hydraulic system. Is the system actuator pressure flow control and load pressure control of the central control element. With the new situation of China's accession to the WTO, the need of market competition and technological progress, people's demands for humanized operation performance of traveling machinery are enhanced. The traditional multi-way valve of processing channel not only wastes...
Sauer-Danfoss launches low-flow, load-sensing hydraulic valves
Sauer-Danfoss has developed the first load-sensing valve for low flow range. The new PVG16 valve facilitates the integration of load sensor system design and electro-hydraulic actuator technology. Developed from Sauer Danfoss' existing PVG technology and components, the PVG16 is rated for up to 17.2 gallons / minute and working port pressures up to 5800 psi. Sauer-Danfoss said the hydraulic valves are mainly used in municipal vehicles, agricultural equipment, small cranes and construction...
Load sensing shuttle valve introduction
The load-sensing shuttle valve loads the load pressure of each working valve plate to the pressure compensated bypass relief valve of the inlet valve block. Two-way pressure compensation set differential pressure relief valve: When more than one working piece valve work, the load pressure to the spring side of the valve. At this point, the negative feedback through the valve heart, to automatically adjust the throttle port pressure across the mouth, so that it remains basically unchanged. Under...
Sealing Technology Analysis of Hydraulic Support Hydraulic Valve
Abstract: Hydraulic support hydraulic valve in the life of a very low solution to foreign ways and means to improve the filtration system and improve the quality of emulsion, but with little effect. This article analyzes the development process of the seal pair of the holder valve, discusses the relationship between the material of the seal pair and the sealing performance. It is pointed out that the sealing technology is the key to improve the service life of hydraulic valve in hydraulic...
Industrial water supply and drainage: proportional valve principle and classification
The proportional control valve is mainly used for openloop control. The output of the proportional control valve is proportional to the input signal, and the magnetic force generated by the solenoid in the proportional control valve is proportional to the current. In the traditional type of hydraulic control valve, only the hydraulic pressure setting control, for example: the pressure valve at a set pressure, the flow valve to maintain the set flow, the directional valve for the flow direction...
Stage mining method, mining method mining column mining
First, the actual and program When using the stage mining method and the mining method, the ratio of the reserves of the ore column varies greatly with the thickness of the ore body. The reserves of thin and extremely thin and steeply inclined veins are generally not more than 5.10%, and can reach 30% to 60% in thick and extremely thick ore bodies. In the latter case, pillar recovery should be the focus of research. Shrinkage Method by mining the thin and steeply inclined thin veins, mostly the...
Wuhan Shipbuilding successfully developed the
China Shipbuilding Heavy Industry News, a few days ago, Wuhan Marine Machinery Co., Ltd. developed the Chinese Polar Center "Snow Dragon" scientific research ship 2 sets of 25 tons-22 meters warehouse double-armed cranes have passed the ship inspection and inspection. The two double cranes simulate the actual working conditions and successfully complete the standard actions such as lifting, variable amplitude, rotation, load and overload. The test results prove that the performance indexes of...
What is a small concrete pump truck? What are the characteristics of small concrete pump truck structure
Small concrete pump truck, also known as concrete pump truck, is the use of pressure concrete along the pipeline for continuous delivery of machinery. Small concrete pump truck is mainly composed of pump body and delivery pipe, pump body mounted on the chassis of the car, and then equipped with retractable or inflatable fabric rod to form a pump truck. By structure, small concrete pump truck can be divided into piston type, squeeze type, hydraulic diaphragm type. What are the characteristics of...
crane touches the high voltage line and employees are electrocuted
Recently, the Shanghai Songjiang District Court heard a case caused by a safety accident. As the crane operated, the boom touched the high-voltage line, causing Xiao Li, an employee of the crane, to be electrocuted. The owner of the owner Wang paid compensation to the insurance company after paying RMB 260,000 compensation to Xiao Li’s family members. However, the owner of the car claimed compensation, and Wang Boshun appealed the insurance company to the court. Recently, the owner of the...
