National Standard 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 National standard flat gate valve meet your needs and do better.
• Check raw materials before production at National standard flat gate valve.
• Spot checks are carried out during the processing of National standard flat gate valve.
• 100% inspection of National standard flat gate valve before shipment.
• Provide a one-year service for the products provided by National standard 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: What are the three main factors to consider when selecting an implementing agency?

A: The output of the actuator should be greater than the load of the valve and reasonably matched. When checking the standard combination, it is necessary to consider whether the allowable pressure difference specified in the valve type meets the process requirements. When the pressure difference is large, the unbalance force of the valve core should be calculated. It is necessary to consider whether the response speed of the actuator meets the process operation requirements, especially the electric actuator.

Q: Compared with the pneumatic actuator, what are the characteristics of the electric actuator and what are the output forms?

A: The electric drive source is simple and convenient, with large thrust, torque and stiffness. But the structure is complicated and the reliability is poor. It is more expensive than pneumatic in small and medium size. It is often used in occasions where there is no air source or strict explosion-proof and flameproof. The electric actuator has three output forms of angular stroke, straight stroke, and multi-rotation.

Q: Why are gate valves not suitable for flow regulation?

A: 1. The motion range of the ram is limited. The motion range of the gate plate in the gate valve is very small, and the flow can only be adjusted at about 10% of the opening degree. Therefore, the adjustment range of the gate valve is narrow, and it is not suitable for large-scale flow regulation.

2. The structure of the ram limits the flow of fluid. When the ram is moving, it will produce a certain resistance and pressure drop on the medium, and the flow direction of the fluid will also change, which will affect the adjustment accuracy of the flow rate.

3. The sealing surface of the gate is not suitable for flow regulation. The sealing surface of the gate is usually straight or inclined, and it does not have the function of flow regulation. The sealing surface of the regulating valve is usually a spherical or conical surface, which has better flow regulation performance.

Therefore, when performing flow regulation, it is necessary to select valves specifically for flow regulation, such as regulating valves, ball valves, butterfly valves, etc., to meet the adjustment needs of different media flow.

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