OEM Class150～900/PN1.0～16.0MPa Manual Cast Carbon Self Sealing Flat Gate Valve for Water Oil Steam System Factory

Purpose and Functions:

• Slab gate valves are used in petroleum, natural gas, water, oil products and other fields. Their function is to cut off or connect the media in pipelines.

Structural Features：

• The valve seat adopts an O-ring seal and a floating valve seat structure that applies preload force, so that the inlet and outlet of the flat gate valve are sealed in both directions; and the opening and closing torque of this structure is only 1/2 of that of ordinary valves, making it easy to open and close. Close the valve. This type of valve should generally be installed horizontally in the pipeline.

• When fully open, the channel is smooth and straight, the flow resistance coefficient is extremely small, and there is no pressure loss. The pipeline can be cleaned through the hair ball.

• It adopts a packing structure with self-sealing ability, which does not require frequent adjustment. It is extremely light to open and close, and the sealing performance is reliable. The stuffing box is equipped with an auxiliary sealing grease injection structure, and the sealing performance is absolutely reliable, truly achieving zero leakage; solving the universal problem. The most common disadvantage of valve packing is leakage

• When the flat gate valve is closed, it can automatically remove the high pressure in the inner cavity to ensure safe use.

• Fully enclosed structure, good protective performance, adaptable to all-weather requirements

Precautions When Using:

• When the internal pressure of the valve is equal, the gate is in a closed state, and the PTFE sealing ring on the surface of the valve seat forms an initial seal. Each time the valve is opened or closed, the valve seat ring can clean both sides of the gate.

• When applying pressure to the valve, the pressure acts on the gate, forcing it close to the PTFE ring on the outlet valve seat, compressing it until the gate stops on the steel valve seat. In this way, a double seal is formed. First, the PTFE ring There is a metal-to-metal seal, and then a metal-to-metal seal, and the valve seat is also firmly picked up into the groove, at which point the O-ring blocks any rear media flow.

• After the valve body pressure is released, an inlet seal is formed. The pipeline pressure acts on the inlet valve seat, causing it to move toward the gate. At this time, a PTFE seal is formed against the metal. At the same time, the O-ring and the valve seat groove form a tight seal. seal

• The valve automatically releases excess pressure. When the valve body pressure is greater than the pipeline pressure, the inlet valve seat is pushed into the groove due to thermal expansion, and the excess pressure in the valve body is released into the pipeline between the valve seat and the gate plate.

 Design and Manufacturing Standards

• Design and manufacturing according to GB/T 12234-89

• The structural length is in accordance with GB/T 12221-89

• Flange connection dimensions: JB/T 79-94

• Valve inspection and testing are in accordance with GB/T 13927-92

Specification 

Body Type

Standards and Norms

Standards and Norms

Performance Parameter

Materials of Main parts

 

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About Application