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Stainless steel gate valve: Stainless steel gate valve specifications

Release Time:

2021-06-11 10:30

Stainless steel gate valve is a pipeline accessory used to open and close the pipeline, control the flow direction, regulate and control the parameters of the conveyed medium (temperature, pressure and flow). It is a control component in the pipeline fluid transfer system, used to change the channel cross-section and media flow direction, with functions such as inflow, cut-off, throttling, check, diversion or overflow pressure relief. The working principle of stainless steel gate valve is not exactly the same, for example, the working principle of ball valve is by rotating the stainless steel gate valve to make the valve open or close. Plug valve working principle: plug valve body rotates around the center line of the valve body to open and close. Its role is to cut off, divide the field, change the direction of media flow. The working principle of check valve: it is a stainless steel gate valve that relies on the force of the fluid itself to open and close automatically, and its function is to prevent the backflow of the medium. In short, the valve can be used to control the flow of various types of fluids, such as air, water, steam, various corrosive media, slurry, oil, liquid metal and radioactive media. Stainless steel gate valves are also classified as cast iron valves, cast steel valves, stainless steel gate valves, devices that flow or stop and control their flow. The valve can be controlled by various modes of transmission, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, solenoid, hydraulic, electro-hydraulic, gas-hydraulic, spur gear and bevel gear drive. In response to pressure, temperature or other forms of sensing signals, the stainless steel gate valve can act as intended, or simply open or close, independent of the sensing signal. The valve relies on a drive or automatic mechanism to move the opening and closing member up and down, slide, swing or rotate, thus changing the size of its flow path area to achieve its control function.


The working principle of stainless steel gate valve The opening and closing part of the gate valve is the gate, and the direction of movement of the gate is perpendicular to the direction of the fluid. Stainless steel gate valve can only be completely open and closed, but can not regulate or throttle. The gate has two sealing surfaces, and the more commonly used mode gate valve has two sealing surfaces of wedge shape. The wedge angle varies with the stainless steel gate valve parameters, generally 5, and 252' when the medium temperature is not high. The gate of the wedge-shaped gate valve can be made into a whole, called a rigid gate; it can also be made into a gate that can produce slight deformation to improve its craftsmanship and compensate for the deviation of the sealing surface angle during processing. This kind of gate is called resilient gate. When the gate valve is closed, the sealing surface can only be sealed by medium pressure, that is, the sealing surface of the gate valve is pressed on the other side of the seat by medium pressure to ensure the sealing surface, which is self-sealing. Most gate valves are forced to seal, that is, when the stainless steel gate valve is closed, the gate is forced to press against the seat by external force to ensure the sealing of the sealing surface. When the gate valve's gate plate moves in a straight line with the valve stem, it is called a lift stem gate valve, also known as an open stem gate valve. Usually, there are trapezoidal threads on the lift rod, and through the nut on the top of the stainless steel gate valve and the guide groove on the valve body, the rotary motion is changed into a linear motion, i.e., the operating torque is changed into an operating thrust. When the stainless steel gate valve is opened, the fluid passage is completely open when the lift height of the gate is equal to 1: 1 times the size of the stainless steel gate valve, but the position cannot be monitored during operation. In practice, the apex of the valve stem serves as a marker, i.e., the immovable position as its fully open position. In order to consider the locking phenomenon caused by temperature changes, the stainless steel gate valve is usually turned back 1/21 turn in the top position as the stainless steel gate valve fully open position. Therefore, the fully open position of the stainless steel gate valve is determined by the position of the gate, i.e., the stroke. In some gate valves, the stem nut is mounted on the gate and the handwheel rotation drives the stem to rotate, thus lifting the gate. This kind of stainless steel gate valve is called rotary stem gate valve or concealed stem gate valve.

Ltd. is mainly engaged in the following products: open stem soft seal gate valve, flange butterfly valve, electric butterfly valve, pneumatic butterfly valve, stainless steel gate valve, stainless steel ball valve and so on. It is a seismic bracket manufacturer with modernized, scientific and diversified production, R&D and sales enterprises of valves, seismic brackets and water treatment equipment. Seismic bracket brand and other supporting complete, from a single product, talent shortage of valve company, step by step steady, relying on the meticulous attitude to quality gradually growing excellent quality, technology first, innovation and pragmatic, integrity management, is our company's business philosophy. We will cooperate with you sincerely with good products, perfect service and reasonable price, and create a brilliant tomorrow of China's valve industry together.

Stainless steel gate valve, gate valve

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Talking about localization of control valves

Nationalization is a trend, and there are some localization requirements in some projects. What are your experiences or views on control valve localization?   There are actually more localization requirements involved in our work. We require designers to treat imported products and domestic products equally, unless for some special control valve products can not be manufactured in the country recommended the use of foreign brands, generally or domestic brand control valves.   For special control valve products, generally in the engineering design, in order to produce a smooth start and operation of the device, the design will generally follow the views of the patent holder to choose a similar device in the use of performance, and in similar devices on the application of good valve products.   About localization, now many direct users of the plant, taking into account the convenience of imported valve repair and maintenance, as well as cost factors, will choose some domestic manufacturers to provide inspection and maintenance services for imported valves, but also when the device used in the import control valve problems, in order not to affect production, in the rework waiting process, the use of domestic brand products as an emergency, once the product can cope with this working condition, the use of good Thus also test the reliability of the product, for the future in the same working conditions of the national brand valve application has laid the foundation. Now there are many enterprises that used to do valve maintenance, have accumulated experience in the practical application, the development of the valve production enterprises, to make a contribution to the localization of valves.   For domestic valve manufacturers, how to win the trust of the owners is crucial. We now have many projects, are private entrepreneurs to invest in the construction of its cost control requirements are relatively high, the use of localized products in the project also accounts for most.   Now many large state-owned enterprises construction projects, have the requirement of localization rate, which also creates a good environment for domestic products to replace imported brands, therefore, domestic enterprises as long as the strengthening of product quality standards requirements, strengthen the internal management of enterprises, continuous technological innovation, to provide good pre-sales and after-sales service, will be able to obtain the trust of the owners, so that the good development of enterprises.