Dark Rod Flat Gate Valve

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1. It has the advantages of simple and compact structure, reasonable design, reliable sealing, light and flexible operation, small size, smooth channel, low resistance, easy installation and easy disassembly.

2. When the valve is fully opened, the flow resistance coefficient is very small, and the valve will eliminate the function of the valve disc and the dirt on the sealing surface every time the valve is opened and closed.

3. The packing is made of flexible graphite ring and graphite packing, reliable sealing, light and flexible operation.

4. It is widely used in oil and water steam pipelines such as petrochemical industry and thermal power plants to connect or cut off the intermediate quality of pipelines. The sealing surface of the opening and closing device has compact structure and reasonable design.

• Our service tenet is customer first, service first. We will provide more accurate and efficient manufacturing and service according to customer requirements.
• We have a professional QC team to ensure that the products in Dark rod flat gate valve meet your needs and do better.
• Check raw materials before production at Dark rod flat gate valve.
• Spot checks are carried out during the processing of Dark rod flat gate valve.
• 100% inspection of Dark rod flat gate valve before shipment.
• Provide a one-year service for the products provided by Dark rod flat gate valve to create value for customers.

• We have complete production technology and management.
• As a manufacturer our price is also good.

To be packed in suitable wooden cases as per client's

Q: Gate valve switching sequence?

A: The valve is generally closed clockwise and opened counterclockwise, that is, close the valve in the direction of the arrow pointing to S, and open the valve in the direction pointing to O. Where s stands for shut= closed and o stands for open= open.

Q: How do gate valves open and close?

A: (1) Gate valve with hand wheel or handle, hand wheel or handle clockwise rotation is closed, counterclockwise rotation is open, other types of actuator gate valve switch operation according to the instructions.

(2) The switch should be stable, the force should be uniform, and the impact force can not be used to switch the gate valve.

(3) Under high pressure, the gate valve switch is easy to stab the gate plate, therefore, the flow can not be adjusted by the gate valve, only in the full open or full close, the handwheel should be turned 1-2 times after the gate valve is closed.

(4) The operator body can not be directly to the valve stem, can not use the booster bar to force the switch.

If there is a hand wheel, turn to the right thumb direction is on, vice versa is off.

Q: What is stuffing?

A: Packing is a dynamic sealing material used to fill the space of the valve packing box to prevent media leakage through the valve stem and packing box space.

Fillers are divided into soft fillers and hard fillers.

① Soft filler. By plant substances, namely hemp, flax, cotton, jute; Or by minerals, namely asbestos fibers; Or by asbestos-free fiber interwoven wire and coated with graphite powder, etc., also used rubber molding filler.

② Plant material filler is cheaper, often used for low pressure valves below 100℃; Mineral fillers can be used for valves below 450 ° C. The packing on the high temperature and high pressure valve is also made of asbestos free velvet and flake graphite powder pressed together.

③ Hard packing. That is, the filler composed of metal or metal mixed with asbestos-free and graphite is formed by the forming filler of polytetrafluoroethylene pressing and sintering. Metal fillers are used less.

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