Ⅰ.Overview of American standard flat gate valve

American standard flat gate valve is a pipeline valve designed according to American standard API6D, mainly used in petroleum pipelines and urban pipe networks. The commonly used structure is a full bore structure with a guide hole, which can be cleaned with a cleaning ball to clean the pipeline. Regardless of whether the valve is opened or closed, the sealing surface of the valve seat is always tightly attached to the gate. In addition, our company has made special improvements to the structure of the packing part of the flat gate valve, and the packing has achieved a true triple sealing effect. The American standard flat gate valve with diversion hole has DBB double blocking and double discharge function, which can be used for pressure testing and inlet sealing. The inlet/outlet sealing has dual safety, small switch torque, and long service life.

Ⅱ.Structural characteristics of American standard flat gate valve

1. The valve seat of the American standard flat gate valve adopts an O-ring seal and a floating valve seat structure with pre tension force, which enables bidirectional sealing of the inlet and outlet of the flat gate valve. The opening and closing torque of this structure is only half of that of ordinary valves, which can achieve easy opening and closing of the valve.

2. When the American standard flat gate valve is fully opened, the channel is smooth and straight, the flow resistance coefficient is extremely small, there is no pressure loss, and it can pass through the cleaning ball to clean the pipeline.

3. The American standard flat gate valve adopts a packing structure with self sealing ability, which does not require frequent adjustment. It is extremely lightweight to open and close, and has reliable sealing performance. The packing box is equipped with an auxiliary sealing high-quality injection structure, and the sealing performance is absolutely reliable. In addition to PTFE packing, it also has a triple sealing structure filled with O-ring sealing sleeve, truly achieving zero leakage and solving the problem of the most common valve packing leakage.

4. When the American standard flat gate valve is closed, it can automatically release the high pressure inside the chamber, ensuring safe use.

5. The American standard flat gate valve has DBB double blocking and double discharge function, which can be used for pressure testing, inlet sealing, and inlet/outlet sealing with double safety.

Ⅲ.Standard specifications for American standard flat gate valves

1. The design standard for American standard flat gate valves is based on API 6D standard

2. The flange standard of American standard flat gate valve is in accordance with ASME B16.5 standard

3. The structural length of the American standard flat gate valve shall be in accordance with ASME B16.10 standard

4. The pressure testing standard for American standard flat gate valves shall be in accordance with API 598/API 6D standards

Ⅳ.Main components and external dimensions of American standard flat gate valve

The expansion type double gate flat gate valve is a pipeline valve designed according to the American standard API6D. The valve adopts a K-shaped double gate design, and the valve seat and gate are made of supersonic sprayed tungsten carbide material, which makes the valve more wear-resistant and has a longer service life. Unique K-shaped double gate design, with more reliable expansion sealing; And it has fire-resistant design, DBB dual blocking and dual emission function, pressure test inlet sealing, dual safety of inlet/outlet sealing, small switch torque, and long service life.

Ⅱ.Structural characteristics of expansion type double gate flat gate valve

1. The valve seat adopts an O-ring seal and a floating valve seat structure with pre tightening force, which enables bi-directional sealing of the inlet and outlet of the flat gate valve. The opening and closing torque of this structure is only half of that of ordinary valves, making it easy to open and close the valve.

2. When fully open, the channel is smooth as a straight line, with a very small flow resistance coefficient and no pressure loss. It can be cleaned by passing a cleaning ball through the pipeline.

3. Adopting a packing structure with self sealing ability, it does not require frequent adjustment, and the opening and closing are extremely lightweight with reliable sealing performance. The packing box is equipped with an auxiliary sealing high-quality injection structure, and the sealing performance is absolutely reliable. In addition to PTFE packing, a triple sealing structure with 0-ring sealing sleeve is also added, truly achieving zero leakage and solving the most common problem of leakage at the packing of general valves.

4. When closed, it can automatically remove the high pressure inside the chamber to ensure safe use.

5. Equipped with DBB dual blocking and dual emission function, it can test the pressure and seal the inlet and outlet with dual safety.

6. The gate adopts a K-shaped double gate design, and the valve seat and gate are made of supersonic sprayed tungsten carbide material, making the valve more wear-resistant and extending its service life

Working principle

The transmission device drives the valve stem, which in turn drives the main gate to move up and down. The auxiliary gate moves together with the main gate under the drive of the connecting rod, thereby realizing the opening and closing movement of the combined gate, and supporting the gate plate at the valve opening and closing positions to achieve the flow and cutoff of the upper and lower media. At the beginning and end of the movement process, the combination gate produces a tight and expanding effect on the sealing surfaces on both sides of the gate due to the cooperation of the main and auxiliary gate plates, in order to achieve forced sealing and protect the sealing surfaces during opening.

Ⅲ.Regarding standard specifications

1. Design standard according to API 6D standard

2. Flange standard according to ASME B16.5 standard

3. The structural length shall be in accordance with ASME B16.10 standard

4. The pressure test standard shall be in accordance with API 598/API 6D standards

Ⅳ.Main components and external dimensions of expansion type double gate flat gate valve

American standard flat gate valve150LB Dimensions

Ⅴ.Precautions for using American standard flat gate valve:

1. Say the important thing three times: don't push yourself to the brink of death! Don't push yourself to the brink of death! Don't push yourself to the brink of death!

2. When opening or closing in place, the valve stem handle or handwheel should be rotated 1/2 turn. To ensure that the gate is in a floating state and maintain good sealing performance.

Note: Pre understand the detailed parameters, data, and prices of American standard flat gate valves,

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