In addition to the advantages of a soft seal gate valve, a rising stem soft seal gate valve can also display the valve opening more intuitively, ensuring reliable opening and closing. Therefore, it is commonly used in fire protection and industrial systems. Generally installed at a higher height above the ground. The open stem elastic seat soft seal gate valve utilizes the deformation compensation effect generated by the overall sealing of the gate to achieve good sealing effect, overcoming the problems of poor sealing, water leakage, and rust in general gate valves. It can be widely used as a regulating and intercepting device on fluid pipelines such as tap water, sewage, construction, petroleum, chemical, food, medicine, minor injuries, electricity, ships, metallurgy, energy systems, etc.

Rising stem soft seal gate valves are used in fire protection systems. If the installation position of the gate valve is high above the ground, a rising stem gate valve is generally used to clearly indicate the valve opening. If the installation position is low, an attached opening indicator gate valve is required.

Rising stem soft seal gate valve, also known as lift stem gate valve or rising 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. When the valve is opened, when the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid channel flows, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position where it cannot be opened, as its fully open position. To consider the phenomenon of locking due to temperature changes, it is usually done by opening the valve to the top position and then reversing it by 1/2-1 turn as the position for fully opening the valve. Therefore, the fully open position of the valve is determined by the position of the gate (i.e. stroke).

The rising stem soft seal gate valve adopts an integral rubber coated valve core, and its ductile iron skeleton is wrapped with rubber and new vulcanization technology inside and outside, which fits tightly and firmly, with good geometric dimensions and sealing elasticity, isolating the valve core metal from the fluid. The copper nut and ductile iron skeleton of the valve core of the open stem elastic seat sealed gate valve are tightly connected by special technology, and will not loosen even under long-term operation and water flow impact, avoiding control failure of the valve.

A rising stem soft seal gate valve consists of valve body, valve cover, valve stem, valve stem nut, gate plate and other components. The open stem elastic seat sealing gate valve achieves good sealing effect by compensating for the slight elastic deformation generated by the elastic gate plate. The elastic seat sealing gate valve has significant advantages such as lightweight opening and closing, reliable sealing, good elastic memory, and long service life. This elastic seat sealed gate valve not only has the advantages of an elastic seat sealed gate valve, but also has a more intuitive valve opening and reliable opening and closing. Therefore, it is often used in fire and industrial systems and is generally installed at a higher position above the ground.

Advantages of rising stem soft seal gate valve:

1. Low fluid resistance, and the sealing surface is less susceptible to friction and erosion from the medium;

2. Switching is effortless;

3. The overall rubber packaging has good elastic memory;

4. The flow direction of the medium is unrestricted, without disturbance or pressure reduction;

5. Adopting the same flat bottom design as the water pipe machine, it is not easy to cause debris accumulation and ensures unobstructed fluid flow;

6. Lightweight;

7. The body is made of ductile black cast iron;

8. The valve body is cast, ensuring the sealing performance of the valve;

9. Simple form, short structural length, good manufacturing processability, and wide applicability.

Main technical parameters of rising stem soft seal gate valve:

Test standard: GB13927 AP1598

Nominal meridian: 50-400mm

Working temperature: 0-80 ℃

Nominal pressure: 1.0-2.5MPa

Applicable media: water, oil, gas, etc

Flange standard: GB/T 17241.6 GB9113