Why Choose Us
Powerful R&D Team
With an autonomous R&D team and a professional technical staff, our company strictly adheres to quality requirements in production and R&D processes for ensuring stable product quality.
OEM Serve
We also offer OEM services and customize products according to the specific needs of our clients, fully meeting all clients‘ requirements.
Professional Solutions
We provide our clients with fast and efficient hose, pipe fitting and valve manufacturing services and comprehensive solutions for piping systems through professional approaches.
Quality Control
Products produced under strict quality control require the inspection department to conduct quality inspection of the goods in the workshop.
What is Gate Valve
Gate valve is an opening and closing member of the gate, the movement direction of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully open and fully closed, can not be used for regulation and throttling. Gate valve through the valve seat and gate contact for sealing, usually the sealing surface will be surfacing metal materials to increase wear resistance, such as surfacing 1Cr13, STL6, stainless steel and so on. There are rigid gate and elastic gate, according to the different gate, gate valve is divided into rigid gate and elastic gate.
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Magnetic Locking Metal Seal Brass Gate Valve
Power：Manual. Structure: Gate. Customized support: OEM, ODM, OBM. Temperature of Media：Medium
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Manual Handle Wheel Brass Gate Valve
Temperature of Media: High Temperature, Low Temperature, Medium Temperature. Media: Water. Product
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Stainless Steel Manual Valve Flange Gate Valve
Product Name: Gate Valve. Power: Manual. Structure: Gate. Customized support: OEM,ODM. Port Size: 2
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Multifunctional 304 Stainless Steel Gate Valve
Media: Water,gas,oil. Product name: Stainless Steel Gate Valve. Color: Red. Body material:
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Main features of gate valves
Simple structure
Gate valve is a kind of straight-through valve, which consists of valve body, gate, stem, sealing washer and so on. Its structure is simple, so the cost is low. The gate can be disassembled for easy cleaning and maintenance.
Good Sealing
The sealing of the gate type globe valve is realized by the friction resistance between the gate and the sealing washer. The sealing effect is achieved by pressing the sealing washer after the gate plate is lowered. Therefore, the sealing performance of the gate valve is good, especially suitable for some occasions with harsh working conditions.
The flow resistance is small
The resistance coefficient of the gate valve is small, the flow characteristics are straight, the opening range is large, and the adjustment performance is good. This makes the gate valve in a variety of working conditions can have good performance.
Long service life
Gate type globe valve internal cavity is smooth, no flange seat, no dead space, not easy to produce lagging phenomenon. In addition, there is no complex parts inside the gate type globe valve, so long service life.
The role of the gate valve
cut-off role
An important role of the valve is the cut-off role. Is to cut off the fluid in the pipeline, not to make it circulate.
01
the role of regulation
The valve according to the needs of the conditions or the use of requirements, regulating the pipeline cut-off flow, temperature, pressure, level and other parameters, and the control of this flow, by the valve opening regulation.
02
the role of the check
Some pipeline requirements of the media flow in one direction, do not allow reverse flow or backward, which should be used to stop the check valve. He is relying on the flow of the medium itself and automatically open and close the valve, used to prevent the medium backflow valve, belongs to a kind of automatic valve, his main role is to prevent the medium backflow.
03
the role of safety
To prevent the high pressure container fluid pressure is too high when exceeding the container's tolerance limit and explosion, are installed on the container can be in a certain pressure when the valve automatically unloading pressure, become a safety valve.
04
Advantages of gate valve
Small flow resistance. Medium channel inside the valve body is straight through, the medium into a straight line flow, flow resistance is small.
When opening and closing more labor-saving. Is compared with the cut-off valve, because whether open or closed, the gate movement direction is perpendicular to the direction of media flow.
Height, opening and closing time is long. The opening and closing stroke of the gate is larger, and the lifting is carried out by the screw.
Water hammer phenomenon is not easy to produce. The reason is that the closing time is long.
The medium can flow in any direction to both sides, easy to install. Gate valve channel is symmetrical on both sides.
The structure length (the distance between the two connecting ends of the shell) is small.
Simple form, short structural length, good manufacturing process, wide range of applications.
Compact structure, good rigidity of the valve, smooth channel flow, flow resistance is small, the sealing surface of stainless steel and hard alloy, long service life, the use of PTFE packing, sealing and reliable, light and flexible operation.
Disadvantages of gate valve
General gate valve has two sealing surfaces, processing and manufacturing more complex than the globe valve
Relative friction between the sealing surface, wear and tear, sealing surface wear repair is not convenient
Valve cavity structure size, resulting in a long structural length, large external dimensions, large installation space, large-diameter gate valve is particularly heavy and bulky
Valve opening and closing time is long
It can form a closed valve cavity, so when needed, should be set to prevent abnormal pressure in the cavity pressure relief structures
Application range of gate valve
Pipeline cutoff and control
Gate valve can be used to cut off the fluid in the pipeline for maintenance and replacement of equipment. In the petroleum, natural gas transportation, chemical, pharmaceutical, light industry and other industries, gate valve is widely used in pipeline cutoff and control.
Flow adjustment
Gate valve can control the flow in the pipeline by adjusting the height of the gate. At this time, the role of the gate valve is similar to a throttle valve. In metallurgy, water treatment, electric power, gas and other industries, gate valves are widely used in flow regulation.
Liquid level control
Gate valves are also used in large reservoirs and sluices. When the water level rises, the gate will move downward to release excess liquid. When the water level falls, the gate will move upward to prevent water shortage.
Precautions for gate valve
The handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
Double gate valve should be installed vertically (i.e., the valve stem is in a vertical position, the handwheel at the top).
With a bypass valve gate valve should be opened before opening the bypass valve (to balance the pressure difference between the import and export and reduce the opening force).
Gate valve with transmission mechanism, installed according to the provisions of the product manual.
If the valve is often used on and off, at least once a month lubrication.
The gate valve only for full open, full closed all kinds of pipeline or equipment for the operation of the media, not allowed for throttling.
With a handwheel or handle of the gate valve, operation shall not be added to the auxiliary bar (if the seal is not tight, then the sealing surface should be checked and repaired or other parts). Handwheel, handle clockwise rotation is closed, and vice versa is open. Gate valve with transmission mechanism should be used in accordance with the provisions of the product instruction manual.
Our Company
Xi'an Changxin Hardware Co.,Ltd. was established in 2010, who is a leading supplier and manufacturer of flexible hoses, faucets, bathroom accessories,valves,pipe fittings and sanitary valves & fittings in China. It is well known in local market and overseas because of exporting their products to more than 80 countries with high quality products and thoughtful services.The company pays attention to every detail of the product from sample drawings to finished products, and carefully incubates every innovative idea. Our products are produced under strict quality control. The inspection department is required to conduct quality inspection of the goods in the workshop. Water testing, gas testing, and pressure testing are our common tests to ensure high-quality products and ensure that customers can cooperate with us without any worries.
