Do you have material requirements for fire gate valves
date:2023-07-12 10:21
The types of fire gate valves can be divided into wedge gate valves and parallel gate valves according to the sealing surface configuration. Wedge gate valves can also be divided into single gate * type, double gate type, and elastic gate type; Parallel gate valves can be divided into single gate and double gate types. According to the thread position of the valve stem, it can be divided into two types: rising stem gate valve and non rising stem gate valve.
1. The valve has low fluid resistance. Due to the straight through type of gate valve body, the medium flow does not change direction, so the flow resistance is smaller compared to other valves.
2. The sealing performance is better than that of globe valves, and the opening and closing are also more labor-saving than globe valves.
3. Fire gate valves have a wide range of applications, not only for media such as steam and oil, but also for media containing granular solids and high viscosity. They are also suitable for use as vent valves and valves in low vacuum systems.
4. Gate valves are valves with dual flow directions, which are not limited by the flow direction of the medium. Therefore, they are suitable for pipelines where the medium may change the flow direction, and are also easy to install.
The opening and closing component of the fire gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces, and the two sealing surfaces of the commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 50, and is 2 ° 52 'when the medium temperature is not high. The gate of a wedge gate valve can be made into a whole, called a rigid gate; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate.
