Carbon Steel Flat Gate Valve

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Technical Specification
Product name	Carbon steel flat gate valve
Design reference	API	ASME
Design standard	API 6D	ASME B16.34
Structural length	API 6D	ASME B16.10
Flanged ends	ASME B16.5、ASME B16.47	ASME B16.5、ASME B16.47
Butt-welding ends	ASME B 16.25	ASME B 16.25
Test & inspection	API 6D	API598
Packing:	To be packed in suitable wooden cases as per client's option or customized
Shipping & Delivery:	20-25 days lead time; deliver by ship from Ningbo port or Shanghai port
Carbon steel	Carbon steel
Notes: Serial valve connecting flange and butt-welding terminal size can be designed at customers'request. The material of the main parts and sealing surface of the valve can be designed and selected according to the actual working conditions or the special requirements of users.

 

 

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 Carbon steel flat gate valve meet your needs and do better.
• Check raw materials before production at Carbon steel flat gate valve.
• Spot checks are carried out during the processing of Carbon steel flat gate valve.
• 100% inspection of Carbon steel flat gate valve before shipment.
• Provide a one-year service for the products provided by Carbon steel 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: Does the force applied to the handwheel need to be large?

A: No, the force applied to the handwheel will be ≤360N.

 

Q: The disadvantage of gate valve?

1. It is easy to cause erosion and abrasion between the sealing surface, and maintenance is more difficult.

2. The overall size is large, the opening needs a certain space, and the opening and closing time is long.

 

Q: How to deal with valve connection leaks?

A: 1. Check that the valve connection bolt has been tightened, if not tightened, its ring flange seal and sealing groove surface, if the connection is not sufficient, often lead to leakage. Check the bolts and nuts and tighten each bolt until the seal ring is compressed.

2. Check the size and accuracy of the surface sealing flange and ring sealing groove, the size of the sealing contact surface is wrong or too rough, so as to repair or update. Also check the surface contact ring and sealing groove of the sealing flange for corrosion, sand holes, pores, sand holes, impurities or other defects, and should be welded, repaired or cleaned accordingly.

 

Q: What happens when it gets stuck or blocked?

A: 1. The throttle clearance of gate valve is small, and there is no small slag in the medium. In case of blockage, install a filter on the pipe in front of the valve to ensure smooth completion of the medium. Therefore, when working with the locator, it is necessary to deal with the air source, and the general method is to install the air purification gate valve on the air source pipeline before the locator.

2. As far as the leakage of the seat valve plate is concerned, it is a more common situation during the installation or maintenance of the gate valve. Usually can be divided into sealing surface and sealing ring root leakage. On the one hand, it is necessary to check the accuracy of the valve seat and the valve plate contact sealing surface and grind it. If the surface accuracy is found to be rough, it needs to be removed and re-ground. On the other hand, it is necessary to check the sealing surface for cracks, etch, sand holes and other related defects, if so, it is necessary to replace the gate or seat.

 

Q: Under what conditions should the valve stem be checked for stability?

A: When the valve is closed, the slender valve stem under axial pressure needs to be checked for the stability of the linear shape balance. Valve stem stability is usually only checked according to normal temperature conditions.

 

Q: What kinds of stresses should be calculated for valve stem nuts?

A: When working, because the valve stem nut bears the axial force of the valve stem, the valve stem nut should calculate the extrusion stress on the surface of the thread, the shear stress at the root of the thread, and the bending stress at the root of the thread.

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