Supply RVSX signal elastic seat seal gate valve

The opening and closing part of the signal gate valve is the gate plate. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed and cannot be adjusted or throttled. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. The gate has two sealing surfaces. The most commonly used mode is that the two sealing surfaces of the gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually when the medium temperature is not high. The gate of the wedge gate valve can be made into a whole, which is 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 the processing. This kind of gate is called an elastic gate. plate. Signal gate valves are generally installed horizontally.
Classification
The types of signal gate valves can be divided into wedge gate valves and parallel gate gate valves according to the sealing surface configuration. Wedge gate valves can also be divided into single gate type, double gate type and elastic gate valve. Gate type parallel gate gate valves can be divided into single gate type and double gate type. According to the thread position of the valve stem, it can be divided into two types: rising stem gate valve and concealed stem gate valve.
When the signal gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, the medium pressure is used to press the sealing surface of the gate plate to the valve seat on the other side to ensure the sealing of the sealing surface. This is self-sealing. Most gate valves adopt forced sealing, that is, when the valve is closed, external force must be relied on to force the gate plate to the valve seat to ensure the sealing performance of the sealing surface.
The gate plate of the signal gate valve moves linearly with the valve stem, which is called a lifting stem gate valve (also called a rising stem gate valve). Usually there is a trapezoidal thread on the lift rod. Through the nut on the top of the valve and the guide groove on the valve body, the rotational motion is changed into linear motion, that is, the operating torque is changed into the operating thrust.
When the valve is opened, when the lift height of the gate plate is equal to times of the valve diameter, the fluid channel is completely unobstructed, but during operation, this position cannot be monitored. In actual use, the top of the valve stem is used as a mark, that is, the position that does not open, as its fully open position. In order to consider the locking phenomenon due to temperature changes, the valve is usually opened to the top position and then retracted/turn as the fully open valve position. Therefore, the fully open position of the valve is determined by the position of the gate plate (i.e. stroke).
Some gate valve stem nuts are set on the gate plate, and the rotation of the handwheel drives the valve stem to rotate and the gate plate is lifted. It is called a rotary stem gate valve or
hidden stem gate valve.
Working principle
Turn the handwheel and advance or retreat through the thread of the handwheel and the valve stem to lift or lower the valve connected to the valve stem. Plate to achieve the function of opening and closing
Advantages and Disadvantages
Advantages
The fluid resistance is small and the sealing surface is less eroded and eroded by the medium.
Opening and closing is less labor-intensive.
The flow direction of the medium is not restricted, does not disturb the flow, and does not reduce the pressure.
The shape is simple, the structure is short, the manufacturing process is good, and the scope of application is wide.
The light weight body is made of high-grade ductile iron, and the weight is more traditional The weight of the gate valve is reduced by about ~~, and it is easy to install and maintain.
Traditional gate valves with flat bottom gates often have foreign objects such as stones, wood blocks, cement, iron filings, debris, etc. deposited in the concave bottom of the valve after the pipe is washed with water. In the tank, it is easy to cause water leakage due to inability to close tightly. The bottom of the elastic seat seal gate valve adopts the same flat bottom design as the water pipe machine, which is not easy to cause debris accumulation and allows the fluid to flow unimpeded.
Disadvantages
Sealing surface It is easy to cause erosion and scratches, making maintenance more difficult.
The overall size is large, it requires a certain space to open, and the opening and closing time is long.
The structure is complex.
Installation and maintenance and attention Matters
Handwheels, handles and transmission mechanisms are not allowed to be used for lifting, and collisions are strictly prohibited.
Double-gate gate valves should be installed vertically (that is, the valve stem is in a vertical position and the handwheel is at the top).
Gate valves with a bypass valve should open the bypass valve before opening (to balance the pressure difference between the inlet and outlet and reduce the opening force).
Gate valves with transmission mechanisms should be installed according to the product instruction manual.
If the valve is frequently used on and off, lubricate it at least once a month.
Market demand
For a long time, the general gate valves used on the market have commonly suffered from water leakage or rust. Our company introduces European high-tech rubber and The elastically seated gate valve produced by the valve manufacturing technology overcomes the defects of general gate valves such as poor sealing and rust. The elastically seated gate valve uses the compensation effect of the elastic gate to produce trace elastic deformation to achieve a good sealing effect. The valve has the characteristics of light switch, It has significant advantages such as reliable sealing, good elastic memory and service life. It can be widely used in pipelines such as tap water, sewage, construction, petroleum, chemical industry, food, medicine, textiles, electric power, ships, metallurgy, energy systems, etc. as a regulator and interceptor. Device use.
Features
The overall rubber-coated gate uses high-quality rubber for the overall inner and outer rubber. Europe's first-class rubber vulcanization technology enables the vulcanized gate to ensure precise geometric dimensions, and the rubber It is firmly connected to the ductile cast gate, not easy to fall off and has good elastic memory. Water
Precision cast valve body The valve body is precision cast, and the precise geometric dimensions ensure the sealing of the valve without any finishing work inside the valve body.
Technical requirements Requirements for valve body