Adjustable 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.

5. The impact of the medium on the gate plate and the regulating seat is reduced, and the service life of the flat gate valve with adjustable flow rate is extended.

6. Changed the traditional gate can only be fully open or trap, can not be adjusted and throttling, need to install another valve for adjustment and throttling, can not meet the needs of the use of pipelines.

• 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 Adjustable flat gate valve meet your needs and do better.
• Check raw materials before production at Adjustable flat gate valve.
• Spot checks are carried out during the processing of Adjustable flat gate valve.
• 100% inspection of Adjustable flat gate valve before shipment.
• Provide a one-year service for the products provided by Adjustable 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 is the difference with the existing gate valve?

A: Compared with the prior art, the flat gate valve provided by the utility model with adjustable flow rate can adjust the direct area of the diversion hole on the gate plate and the adjustment hole on the adjusting seat through the valve stem, adjust the medium flow through the flat gate valve, and improve the structural strength of the gate plate and the adjustment accuracy of the gate valve. Avoid the pressure sudden impact of the medium on the gate at the diversion hole and the regulating hole, which will cause the damage of the gate, and extend the service life of the gate; There is an Angle between the center line on the longitudinal section of the adjustment hole and the center line on the longitudinal section of the adjustment seat, so that the flow direction of the fluid medium at the diversion hole and the adjustment hole is changed, so as to avoid the impact of the fluid medium on the gate plate and the adjustment seat, and further extend the service life of the flat gate valve with adjustable flow.

Q: How certain is the flow range?

A: We will provide the appropriate product according to the working condition data you provide, and determine the final product structure according to the pressure difference, flow and other data.

Q: How is the internal leakage of the valve usually caused?

A: The internal leakage of the valve is usually caused by the failure of the valve seal pair.

As we all know, the partition of the medium in the tube is achieved by the surface sealing of the spool and the seat. However, due to the flatness of the two sealing surfaces caused by adhesive wear resulting in increased tolerances, erosion of hard particles under load, cavitation caused by the change of liquid pressure at the bubble point, cavitation caused by the damage of the protective film of corrosion-resistant materials, corrosion of bare metal in the corrosive environment, etc., may lead to the valve core and seat sealing fire effect, resulting in internal leakage of the valve.

Q: How is valve leakage usually caused?

A: Aside from the factor of valve body defect, the external leakage of the valve is mostly caused by the damage of the middle flange or the valve stem packing box seal. The sealing of the middle flange mainly depends on tightening the uniform bolt, such as the pre-tightening force of the bolt is too small, can not reach the initial sealing pressure required by the flange and the gasket, or the pre-tightening force of the bolt is too large, so that the gasket has excessive deformation, the gasket is not enough to spring back when working, and the sealing pair will leak. After determining the temperature and pressure level of the valve, the selection of bolts and gaskets materials becomes the key to the sealing of the middle flange.

The leakage at the valve stem is achieved by the stuffing box. The use conditions of the valve, the stem material, the performance and size of the packing, and the pre-loading force of the packing box all affect the sealing of the packing box. The erosion and abrasion of foreign matter, the loss of elasticity and loose packing are the main reasons for the failure of packing box seal.

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