ISO Slab Gate Valve

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Technical Specification
Product name	ISO slab gate valve
Design reference	ISO
Design standard	ISO 6002
Structural length	ISO 5208
Flanged ends	ISO 5752
Butt-welding ends	ISO 6002、ASME B16.34
Test & inspection	ISO 6002
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
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 ISO slab gate valve meet your needs and do better.
• Check raw materials before production at ISO slab gate valve.
• Spot checks are carried out during the processing of ISO slab gate valve.
• 100% inspection of ISO slab gate valve before shipment.
• Provide a one-year service for the products provided by ISO slab 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.

 

Q: Is it in stock?

A: Please contact us and we will let you know if it is in stock.

 

Q: What is the effect of the sealing surface width on the sealing performance of the valve?

A: The width of the sealing surface determines the length of the capillary hole, and when the width increases, the movement of the fluid along the capillary hole is lengthened, so the movement resistance is increased. Increasing the width of sealing surface can reduce the etch wear in high-pressure valves. When the width of the sealing surface is increased, the length of the leakage stroke will be proportional to the increase, so the leakage can be reduced proportionally. However, the width of the sealing surface increases, and under the same sealing force, the sealing ratio is smaller than the reduction, which will increase the possibility of leakage. Therefore, the width of the sealing surface cannot be increased indefinitely.

 

Q: What is the effect of sealing surface material and its treatment status on sealing performance?

A: The sealing surface material and its processing state have a great impact on the amount of leakage. Because the size of the remaining gap between the sealing surface depends on the microscopic roughness of the sealing surface, if the sealing ring of steel material is used to cause the same degree of sealing, there must be a larger specific pressure, and its value must exceed the specific pressure value of the sealing ring made of brass.

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