Valve procurement project of a Chemical Co., Ltd. in Tianjin

     On September 25, 2021, Yaoxin (Tianjin) fluid control equipment Co., Ltd. successfully bid for the valve procurement bidding project of a Chemical Co., Ltd. in Tianjin.

Most of the chemical projects purchase gate valves, welded gate valves, gear flange gate valves, worm gear wafer butterfly valves, three eccentric wafer butterfly valves, ball valves, flange globe valves, check valves, etc

Introduction to gate valves

The opening and closing part is a ram. The movement direction of the ram is perpendicular to the fluid direction. The gate valve can only be fully opened and closed, but not adjusted and throttled. The ram has two sealing surfaces, and the two sealing surfaces of the most commonly used Mode RAM valve form wedge and wedge angle valves.

This time, z41h-150lb, DN25 / DN50 /dn80 are mainly used to replace the internal leakage of v3101 drain valve lv3061 rear hand valve, liquefied gas hand valve, t3602a nitrogen hand valve, etc

Advantages of using gate valve

1. Low flow resistance. The medium channel inside the valve body is straight, the medium flows in a straight line, and the flow resistance is small.

2. It is labor-saving when opening and closing. Compared with the stop valve, the movement direction of the ram is perpendicular to the medium flow direction whether it is open or closed.

3. High height and long opening and closing time. The opening and closing stroke of the ram is large, and the lowering is carried out through the screw.

4. Water hammer is not easy to occur. The reason is that the shutdown time is long.

5. The medium can flow in any direction on both sides, which is easy to install. Both sides of the gate valve channel are symmetrical.

6. The structure length (the distance between two connecting end faces of the shell) is small.

7. The sealing surface is easy to wear, affecting the service life. During opening and closing, the two sealing surfaces of the ram and the valve seat rub and slide against each other, which is easy to cause abrasion under the action of medium pressure, affecting the sealing performance and shortening the service life.

8. Prices are quite expensive. There are many contact sealing surfaces, and the processing is complex, especially the sealing surface on the ram seat is difficult to process, and there are many parts.

9. The utility model has the advantages of simple shape, short structural length, good manufacturability and wide application range.

10. Compact structure, good valve rigidity, smooth channel, small flow resistance, stainless steel and hard alloy sealing surface, long service life, PTFE packing, reliable sealing, light and flexible operation.

Introduction to triple eccentric wafer butterfly valve

The clamp type three eccentric butterfly valve adopts the three eccentric metal sealing structure, which not only has all the excellent performance of the common multi-level three eccentric metal hard sealing butterfly, but also makes improvements and innovations in the design, reasonably reduces the radial eccentricity, and adds a seat with automatic compensation function. Under the closed state, the valve rod receives less torque and is in static balance, At the same time, the butterfly valve body is designed with a movable valve seat sealing ring, which can have a very good automatic compensation function. When the valve is under reverse pressure, the relative displacement between the sealing surface of the butterfly plate and the sealing surface of the valve body is fully compensated. In addition, the butterfly plate sealing ring adopts a multi-level structure seal composed of high-quality elastic wear-resistant graphite rubber plate and high toughness wear-resistant stainless steel sheet, which is not only flexible but also very flexible and maintains the best seal with the moving valve seat sealing ring. Therefore, the butterfly valve is under forward or reverse pressure, All can reach 100% zero leakage under full differential pressure. The valve is characterized by two-way pressure and convenient maintenance.

D373h-150lbc DN300 triple eccentric wafer butterfly valve is mainly used for circulating water

Features of wafer type three eccentric butterfly valve:

1. The valve adopts a three eccentric sealing structure, with almost no wear between the valve seat and the butterfly plate, and has a tighter sealing function.

2. The sealing surface of butterfly plate adopts surfacing cobalt based cemented carbide, which is wear-resistant and has long service life.

3. Large size butterfly plate adopts quilted frame structure, with high strength, large flow area and small flow resistance.

4. The driving device can be installed in multiple positions (rotated by 90 ° or 180 °) for the convenience of users.

5. The valve has a two-way sealing function. It can be installed in any direction without the restriction of medium flow direction or the influence of space position.

6. The sealing ring is made of stainless steel, which has the double advantages of metal hard seal and elastic seal. It has excellent sealing performance, corrosion resistance and long service life under both low and high temperatures.

Yaoxin assisted in project selection, provided drawings and suggestions, and was highly praised by customers after supply.