F4/F5 DIN3352 Metal Seal Non-Rising Stem/ OS Cast Iron Flanged Gate Valve

Introduction

The gate valve opening and closing part is a ram, and the movement direction of the ram is perpendicular to the fluid direction. The gate valve is used as the cut-off medium. When it is fully opened, the whole flow channel is straight through. At this time, the pressure loss * of medium operation is small. According to the form of sealing elements, gate valves are often divided into several different types, such as wedge gate valve, flat gate valve, parallel double gate valve, wedge double gate valve, etc. Gate valves are usually suitable for working conditions that do not need to be opened and closed frequently and keep the gate fully open or fully closed. Not suitable for use as regulation or throttling. Different materials can be used for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.
The driving devices include hand wheel, bevel gear, electric, pneumatic, etc.
 

Structural features

 
 
1. The ram has two sealing surfaces, * it is commonly used that the two sealing surfaces of the ram form a wedge, and the wedge angle varies with the valve parameters, usually 5 °.
2. The sealing principle of wedge gate valve is to achieve sealing by the close combination of the two sealing surfaces on the wedge and the two sealing surfaces on the valve body.
3. Wedge gate valve can be divided into rising stem gate valve (lifting stem gate valve) and Non rising stem gate valve (rotating stem gate valve) according to the different opening and closing modes of gate valve driven by valve stem.
4. Wedge gate valve can be divided into elastic gate valve and rigid gate valve according to different gate structure.
5. The valve body is cast, the valve body and bonnet are connected by bolts, the middle flange is sealed by spiral wound gasket, and metal ring can also be used when customers have special requirements.
6. The channel is smooth and the flow coefficient is small. The sealing surface is less scoured and eroded by the medium.
7. The sealing surface is made of alloy steel or cemented carbide, with good wear resistance and scratch resistance.
8. Flexible graphite packing is adopted, with reliable sealing and light and flexible operation.
9. The flow direction of the medium is unrestricted, without disturbing the flow and reducing the pressure.
10. The utility model has the advantages of simple shape, short structural length, good manufacturability and wide application range.
 
 

Dimensions

Basic standard