The open stem groove soft seal gate valve is easy to maintain, install, and has low cost. It is widely used in industries such as water supply and drainage, fire protection, buildings, power, metallurgy, etc., as a shut-off device.

The stem and valve cover of the open stem groove soft seal gate valve are designed with three "O" ring seals, which can reduce frictional resistance during opening and closing, significantly reduce water leakage, and allow for continuous flow of medium in the pipeline by replacing the seals. In addition, due to the epoxy resin coating inside the valve body, the inner and outer surfaces of the valve plate are covered with rubber to prevent the occurrence of molten iron or corrosion, making it suitable for drinking.

The structural characteristics of the open stem groove soft seal gate valve:

1. The self sealing valve cover and valve body are designed with a self sealing structure. Within the allowable pressure range, the higher the fluid pressure, the tighter the seal.

2. The upper sealing structure between the valve stem and the valve cover is specially designed with three O-ring seals. Compared with the packing sealing structure of traditional gate valves, the channel seal is tight and the friction resistance is greatly reduced. When the valve is at any opening, under pressure, and has a valve stem locking function, the valve stem will not be pushed out by pressure during operation and maintenance, avoiding personal injury.

3. The structure is lightweight and compact, reducing the working height by more than 60mm to 300mm compared to traditional gate valves, saving engineering space; The body is made of ductile iron material, which reduces the weight by about 20% -30% compared to traditional gate valves, and is easy to install and maintain.

4. The overall rubber coated valve core ductile iron skeleton is covered with rubber and new vulcanization technology inside and outside, with tight and reliable fit, good geometric dimensions, and excellent sealing elasticity, isolating the valve core metal from the fluid.

5. The copper nut of the integrated copper nut valve core is tightly connected to the ductile iron skeleton using special technology, and will not loosen even under long-term operation and water flow impact, avoiding control failure of the valve.

6. Our company's flat bottomed valve seat elastic seat sealing gate valve adopts a full basin straight through design at the bottom, which is equivalent to a straight pipeline and is not easy to accumulate debris. The seal is reliable and allows fluid flow to be unobstructed.

7. Hygiene requirements: The interior of the valve body should be coated with epoxy resin, and the inner and outer surfaces of the valve core should be covered with rubber to prevent rust or corrosion. It can be directly used in drinking water systems and the food and pharmaceutical industry.

The rubber used for the soft seal gate valve plate with a clear stem groove is fully encapsulated inside and outside. The rubber vulcanization technology in Europe enables the vulcanized valve plate to have the same geometric dimensions, and the rubber is firmly attached to the ductile iron valve plate, making it difficult to fall off and having good elastic memory. Due to the epoxy resin coating inside the valve body, the inner and outer surfaces of the valve plate are covered with rubber to prevent the occurrence of molten iron or corrosion, making it suitable for drinking.

When the open stem groove soft seal gate valve is closed, the sealing surface can be sealed solely by the medium pressure, that is, the sealing surface of the gate is pressed against the valve seat on the other side by the medium pressure to seal the surface, which is called self sealing. Most gate valves use forced sealing, which means that when the valve is closed, external force must be used to forcefully press the gate plate against the valve seat to ensure the sealing performance of the sealing surface.

The gate of the open stem groove soft seal gate valve moves in a straight line with the valve stem, which is called a lift stem gate valve or an open stem gate valve. Usually, there are trapezoidal threads on the lifting rod, and through the nut on the valve and the guide groove on the valve body, the rotational motion is converted into linear motion, that is, the operating torque is converted into operating thrust.

The valve body of the open stem groove soft seal gate valve is cast, and its geometric dimensions allow for the sealing of the valve without the need for any internal processing.

DN450-600mm， An additional labor-saving device can be installed, which requires about half of the normal torque. With only a small handwheel, it can be fully opened or fully closed under pressure. The labor-saving device needs to fully open the valve before restoring its labor-saving function with each action.