Five elements of stainless steel knife gate valve
The opening and closing member of the knife gate valve is the door, and the movement direction of the fluid is perpendicular to the direction of the door. The knife gate valve can only be fully opened and closed, and cannot be adjusted and throttled. The plunger has two sealing surfaces, and the gate valve forms a wedge-shaped sealing surface in two more common ways, with the parameters of the valve, usually a wedge angle of 50, the wedge-type knife gate valve can be made into a whole, called a rigid gate; when can It is made into a gate that can produce a small amount of deformation to improve its process and make up for the deviation of the sealing surface angle during processing. This gate is called an elastic gate. When the knife gate valve is closed, the sealing surface can only rely on the medium pressure. To seal, which relies on media pressure to press the gate against the sealing surface on the other side of the seat to ensure sealing, this is the self-sealing sealing surface. Most knife gate valves seal by force, that is, when the valve is closed, the shutter will be forced to rely on external pressure on the valve seat to secure the sealing surface of the seal.
Stainless Steel Knife Gate Valve / Overview
1. The structure, the length of material saving is short, which can greatly reduce the total weight of the piping system.
As the name implies, it is a knife gate valve on the bottom of a plate valve plate with a knife bevel cut, which has the function of cutting off the medium, so that the valve is closed from the media block. This valve is commonly used to open and close the flow of pulp, ash, chemicals, sewage, food and other media. The usual pressure range is 1.6MPa, and the high temperature used is generally below 120°C, instead of using special materials. The requirements for sealing performance can be divided into soft sealing and hard sealing. According to the rank sum test, the soft seal can achieve zero leakage and hard seal leakage.
The valve has easy operation, free opening, flexible and reliable motion; simple maintenance valve assembly, reasonable sealing structure, convenient and practical sealing ring replacement.
2. The small occupied effective space can effectively support the strength of the pipe fittings, and the pipe can reduce the possibility of vibration.
3. The shutter is made of austenitic stainless steel, the corrosion resistance is greatly improved, this choice can effectively prevent the corrosion of the leaking diarrhea from the shutter seal.
4. The PTFE seal is reliable, and the operation is light and flexible.
5 Knife gate valve can effectively pick off all kinds of sundries in the media.