Manual gate valve overview
The opening and closing part of the manual gate valve is the gate. 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 more commonly used mode gate valve form a wedge shape, and the wedge angle varies with the valve parameters. The gate of the wedge gate valve can be made into a whole, called a rigid gate, or it can be made into a gate that can produce a small amount of deformation to improve its manufacturability and make up for the deviation of the sealing surface angle during processing. The plate is called an elastic gate.
When the diameter of the selected manual gate valve is too large or the pressure is too high, gear transmission should be used, and conventional handwheels can be unilaterally selected for operation.
Advantages of manual gate valve:
1. The fluid resistance is small, and the sealing surface is less brushed and eroded by the medium.
2. It is more labor-saving to open and close.
3. The flow direction of the medium is not restricted, the flow is not disturbed, and the pressure is not reduced.
4. The shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide.
Manual gate valve features:
Light weight: The body is made of high-grade ductile black cast iron, which is about 20%~30% lighter than the traditional gate valve, and is easy to install and maintain.
Flat-bottomed gate seat: The traditional gate valve often accumulates in the groove at the bottom of the valve due to foreign objects such as stones, wood blocks, cement, iron filings, sundries, etc. after the pipe is washed with water, which is easy to cause water leakage that cannot be closed tightly. The bottom of the elastic seat sealing gate valve adopts the same flat-bottom design as the water pipe machine, which is not easy to cause debris accumulation and makes the fluid flow unobstructed.
Integral lagging: The gate is made of high-quality rubber for the overall inner and outer covering. The first-class rubber vulcanization technology in Europe enables the vulcanized gate to ensure accurate geometric dimensions, and the rubber and the ductile cast gate are firmly bonded, not easy to fall off and Good elastic memory.
Precision casting valve body: The valve body adopts precision casting, and the precise geometric dimensions make the valve body do not need any finishing inside to ensure the sealing of the valve.
Features of manual flat gate valve:
The manual single and two-way flat gate valve has simple structure, light weight, flexible operation, convenient assembly and disassembly, and is made of high-quality carbon steel, which has high strength, good performance and long service life; Influence of external dust.
Manual flat gate valve application:
Manual single and two-way flat gate valves are suitable for pipelines for dust material flow control in building materials, metallurgy, mining and other industries. It is an ideal equipment for controlling the flow of dust materials.
The working principle of manual flat gate valve:
Manual single and two-way flat gate valve is mainly composed of frame, screw nut, hand wheel, sprocket, hand wheel (sprocket) rotation, screw with screw nut and gate for horizontal reciprocating movement, to achieve valve opening. closed purpose.
For a long time, the general gate valves used in the market generally have the phenomenon of water leakage or rust. The elastic seated gate valve produced by the company introduced high-tech rubber and valve manufacturing technology from Europe overcomes the defects of poor sealing and rust of the general gate valve. The elastic seated gate valve Using the compensation effect of the elastic gate to produce a small amount of elastic deformation to achieve a good sealing effect, the valve has significant advantages such as light switch, reliable sealing, better elasticity and service life. It can be widely used in tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electric power, shipbuilding, metallurgy, energy system and other pipelines as regulation and interception device.