Bellows 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. It adopts waveform tube as sealing element, which can effectively solve the problem of leakage and stuck in the traditional gate valve under high temperature, high pressure and strong corrosive medium.

• 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 Bellows flat gate valve meet your needs and do better.
• Check raw materials before production at Bellows flat gate valve.
• Spot checks are carried out during the processing of Bellows flat gate valve.
• 100% inspection of Bellows flat gate valve before shipment.
• Provide a one-year service for the products provided by Bellows 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 advantages of bellows soft seal flat gate valves compared to traditional hard seal gate valves?

A: 1. Good sealing performance: The use of bellows as a sealing element can adapt to the temperature, pressure and corrosion of different media to ensure the sealing performance of the valve.

2. Low operating force: Due to the use of bellows as a sealing element, it can greatly reduce the operating force, reduce the difficulty of operation, and improve work efficiency.

3. Strong corrosion resistance: The selection of corrugated pipe material can be adjusted according to the corrosion of the medium, so that the valve has good corrosion resistance.

4. Long service life: the bellows seal structure can effectively reduce the probability of leakage, extend the service life, and reduce maintenance costs.

5. High reliability: Due to the use of corrugated pipe as a sealing element, to avoid the traditional hard seal gate valve easy to jam, easy to leak and other problems. Therefore, the bellows soft seal flat gate valve has higher reliability and stability.

Q: What is the general method of non-destructive testing of valve housing?

A: The method of non-destructive testing can effectively find the internal defects of the shell. For thin shells, magnetic particle detection is used. For thicker shells, X-ray detection is used; For the shell whose wall thickness is more than 60 mm, Co60 ray is used to detect the flaw. The welding interface adopts color flaw detection; Forgings can be ultrasonic flaw detection; Non-ferromagnetic materials (such as austenitic stainless steel, duplex stainless steel) should be X-ray detection.

Q: What are the ways to prevent the nut from loosening?

A: Nuts, spring washers, stop washers, cotter pins and other connectors are commonly used on the valve to prevent the nut from loosening. The connection structure between the valve stem and the closing part is often prevented by the clamping method of the stop washer and the clamping method of the fin washer, and the effect is better. In addition, the method used to prevent the valve from loosening is the mounting screw (riding screw) fixing method and the point riveting method, both of which are used in the occasion that is not often disassembled. Point riveting method is to rivet two points or more than two points at the thread where the nut and bolt engage, so that the thread is squeezed and deformed to achieve the purpose of anti-loosening. If the nut is loose and the above methods are difficult to solve, the adhesive method can be used.

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