Differential pressure wedge oil-sealed gate valve, wedge oil-sealed gate valve.gate valve

Product Overview The structural principle of the differential pressure wedge oil-sealed gate valve: The Qiba differential pressure oil-sealed wedge gate valve is developed on the basis of the existing wedge elastic gate valve structure. That is, at the middle cavity and seat position of the existing wedge gate valve body, there is an automatic oil pressure sealing lubrication mechanism. This mechanism is composed of an oil cylinder containing sealing grease, a piston that can move along the inner surface of the oil cylinder, and a seat. When the valve is closed, The middle cavity of the valve body is filled with medium pressure. After the valve, that is, at the downstream end of the valve, due to the clamping being cut off, a pressure difference is formed with the middle cavity. Under the action of this pressure difference, the piston is pushed downward, thereby compressing the sealing grease in the oil cylinder and entering the sealing surface of the valve seat through the valve seat channel to form a sealing oil film, thus achieving sealing. At the front and rear parts of the valve body's exterior, there is a sealing grease compensation press-in mechanism. When the valve leakage requires compensation of sealing grease, simply rotate the cover, and the sealing grease can pass through the oil hole of the valve body and enter the sealing surface of the valve seat to achieve sealing again.

Ii. Main Features and Applications of Differential Pressure Wedge Oil-Sealed Gate Valve:

1. Compact structure, reasonable design, good valve rigidity, smooth channel and low flow resistance coefficient.

2. The sealing surface is made of stainless steel and hard alloy, which ensures a long service life.

3. Flexible graphite packing is adopted, ensuring reliable sealing. The operation is light and flexible.

4. The drive methods are divided into manual, electric, pneumatic, and gear transmission. Structural types: elastic wedge single gate plate, rigid wedge single gate plate and double gate plate types.

5. It is widely applicable to petrochemical, thermal power plants and other oil and water steam pipelines as an opening and closing device for connecting or cutting off the medium in the pipeline.

6. Differential pressure gate valves are suitable for opening and closing devices on oil and natural gas pipelines.

Iii. Implementation Standards:

General valve flange and butt-weld connection steel gate valve GB12234

The structural length of flange-connected metal valves is as per GB12221

Integral cast steel pipe flange JB/T79.1~97.4

Requirements for metal materials resistant to sulfide stress cracking in natural gas ground facilities SY/T0599

Steel valves generally require GB/T12224

General valve supply requirements GB/T12252

Inspection and testing of valves JB/T9092

General valve marking GB/T12220

It is widely applicable to petrochemical, thermal power plants and other oil and steam pipelines as an opening and closing device for connecting or cutting off the medium in the pipeline.

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.