Rising stem elastic seated gate valve

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Payment Type:	T/T
Incoterm:	FOB
Transportation:	Ocean,Land
Port:	chongqing,,

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Product Description

Product Attributes

Product Name: Valve

Specification And Model: complete specifications

Applicable Industry: wide application range

Applicable Medium: water

Valve Function: adjustment

Parts And Accessories: valve body

Temperature Environment: optional

Drive Mode: manual

Processing Customization: Yes

Sealing Material: consult customer service

Packaging & Delivery

Selling Units	:	Piece/Pieces
Package Type	:	container
Picture Example	:

Product Description

The Gate Valve is a gate that opens and closes. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be used as a Control Valve or a Throttle Valve. The gate valve is sealed through the contact between the valve seat and the gate plate. Usually the sealing surface is surfacing with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. Gates include rigid gates and elastic gates. According to the different gates, gate valves are divided into rigid gate valves and elastic gate valves.

Z41x Rising Stem Elastic Seated Gate Valve

The opening and closing part of the 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. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used model gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 5°, and 2°52' when the medium temperature is not high. The gate plate of the wedge 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 the processing. This kind of gate The plate is called an elastic gate. When the 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 surface sealing, which 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 gate valve moves linearly with the Valve Stem, which is called a lifting stem gate valve or 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 rotating 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 1:1 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 1/2-1 turn as the fully open valve position. Therefore, the fully open position of the valve is determined by the position of the gate, that is, the stroke. In some gate valves, the valve stem nut is set on the gate plate, and the rotation of the handwheel drives the valve stem to rotate, thereby lifting the gate plate. This kind of valve is called a rotating rod gate valve, or a concealed rod gate valve.

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