High Temperature 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 High temperature flat gate valve meet your needs and do better.
• Check raw materials before production at High temperature flat gate valve.
• Spot checks are carried out during the processing of High temperature flat gate valve.
• 100% inspection of High temperature flat gate valve before shipment.
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• 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: High temperature valve definition and classification?

A: In the general information, the valve operating temperature t > 450℃ valve is called high temperature valve. There is no unified standard for the classification of high temperature valves. According to decades of experience in the production of high temperature valves, the high temperature grade is divided into five levels.

Operating temperature t> 425 ~ 550℃ is PI grade,

Operating temperature t> 550 ~ 650℃ is PII level,

Operating temperature t > 650 ~ 730℃ is PIII grade,

Operating temperature t > 730 ~ 816℃ is PIV grade,

Operating temperature t > 816 ° C is the PV level. Among them, PI ~ PIV valves mainly rely on the selection of appropriate materials to ensure its performance, PV valves in addition to material selection is more important to use special design means, such as lining insulation lining or taking cooling measures.

Q: What are the design points of high temperature valves?

A: When designing high temperature valves, special attention should be paid to the influence of thermal expansion, thermal alternations and mechanical properties of materials. Due to the difference in the coefficient of thermal expansion of the material, the thermal load of the parts, etc., even the expansion amount of the valve seat and the valve core heated almost at the same time are different at high temperature. In order to effectively reduce the jam or abrasion caused by temperature between the parts, the working gap between the valve parts should be appropriately increased, and the increase in the gap should be determined according to the thermal expansion coefficient of the material, the stress and the actual use temperature. High temperature thermal alternations will lead to the loosening of the connection between the seat and the guide sleeve, aggravate the fatigue and aging of the valve parts, etc., in the design, appropriate measures should be taken according to the specific situation, such as the elastic seat in the sealing structure. High temperature will significantly affect the mechanical properties of the material, the strength of the material at different temperatures, hardness, plasticity, elastic modulus and bossan ratio will also be different, in the design to fully consider the impact of these factors on the performance of the valve.

Q: What are the requirements for sealing surface materials?

A: When selecting sealing surface materials, the following requirements should usually be met.

① It has good sealing performance, that is, the sealing surface has a good ability to prevent the leakage of the medium.

② Has a certain strength, that is, the sealing surface does not produce plastic deformation under larger specific pressure conditions.

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