Z641H-16C Flanged Type Pneumatic Gate Valve WCB Stainless Steel Body with Actuator PTFE Flexible Graphite Manufacturers

Purpose and Functions:

• Pneumatic gate valve is a valve driven by compressed air. 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. This It's 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.

• Flexible and reliable pneumatic-manual conversion mechanism. The pneumatic-manual conversion mechanism is installed on the upper part of the cylinder head. At any position during the opening and closing process of the gate valve, the operating handle can be easily turned to directly switch from pneumatic to manual or vice versa. To convert to pneumatic operation mode, the conversion operating handle adopts a positioning pin self-locking design. After the handle is positioned, it is reliable and stable. When a failure occurs in the solenoid valve and its control circuit or the air supply system, it can be quickly converted to manual operation without the need for other auxiliary tools to ensure normal operation of the line and avoid accidents. Before the self-control system of the new project is completed, this series of gate valves can be reliably used as a manual gate valve, with flexible and light movements.

• The valve closing time is adjustable. By adjusting the buffer mechanism installed on the partition, the gate closing time can also be adjusted within a certain range.

Applicable Standards:

• Design and manufacturing: API600 ASME B16.34

• Structure length: ASME B16.10

• Flange connection size: ASME B16.5, ASME B16.47, ASME B16.25

• Inspection: ISO 5208,API 598

Structural Features:

• The gate has two sealing surfaces. The most commonly used one is that the two sealing surfaces of the gate form a wedge shape. The wedge angle varies with the valve parameters, usually 5°.

• The sealing principle of the wedge gate valve is achieved by the tight combination of the two sealing surfaces on the wedge gate plate and the two sealing surfaces on the valve body when they are wedged together.

• Wedge gate valves can be divided into rising stem gate valves (lifting stem gate valves) and concealed stem gate valves (rotating stem gate valves) according to the different ways in which the valve stem drives the gate plate to open and close.

• Wedge gate valves can be divided into elastic gate valves and rigid gate valves according to the different gate structure forms.

• The valve body is cast, the valve body and the valve cover are connected by bolts, and the middle flange is sealed by a wound gasket. Metal rings can also be used when customers have special requirements.

• The channel is smooth and the flow coefficient is small. The sealing surface is less susceptible to erosion and erosion by the medium.

• The sealing surface is made of alloy steel or carbide, which has good wear resistance and scratch resistance.

• Using flexible graphite filler, the sealing is reliable and the operation is light and flexible.

• The flow direction of the medium is not restricted, and it does not disturb the flow or reduce the pressure.

• Simple shape, short structural length, good manufacturing process, and wide application range.

Specification 

Body Type

Standards and Norms

Standards and Norms

Performance Parameter

Materials of Main parts

 

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