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Classification of stainless steel ball valves
The release date：2017-08-04 hits:
The ball valve can be divided in the form of structure
Ball valve: the ball of ball valve is floating. Under the action of medium pressure, the ball can produce a certain displacement and press on the sealing surface of the outlet to ensure the outlet seal.
Floating ball ball valve has simple structure, good sealing, but all spheres of work under medium load to export seal, therefore should consider to seal material can withstand sphere medium working load.
This structure is widely used in low-pressure ball valves.
Fixed ball valve: the ball valve is fixed and not moved after compression.
Fixed ball ball valves are equipped with floating seats, which are moved by the medium pressure so that the sealing ring is pressed against the ball to ensure seal.
Generally, bearings are fitted on the upper and lower shafts of the ball, and the operating torque is small, suitable for high pressure and large diameter valves.
To reduce the number of ball valve operating torque and increase the reliability of the seal, oil seal ball valve, both betting special lubricant between the sealing surface, in order to form a layer of oil film, which increases the sealing, and reduce operating torque, suitable for high pressure large diameter ball valve.
Ball ball valve: ball valve ball is elastic.
Both the ball and seat ring are made of metal material. The sealing ratio is very high. The pressure of the medium itself cannot meet the requirement of sealing.
This valve is suitable for high temperature and high pressure media.
The elastic sphere is an elastic trough in the lower end of the inner wall of the sphere.
When the channel is closed, the wedge head of the stem causes the ball to rise and the seat pressure is sealed.
Loosen the wedge head before turning the ball, and the ball will then return to its original shape, allowing a small gap between the ball and the seat to reduce the friction and operating torque of the cover.
The ball valve can be divided into straight, three and right angles according to its channel position.
Tee ball valves are type T and L.
The T type can connect three orthogonal pipes to each other and cut off the third channel.
The l-type can only connect two orthogonal channels, and cannot maintain the connection of the third pipe at the same time.
1. The three-way ball valve adopts the integrated structure in the structure, the seal type of the 4-sided seat, the flange connection is less, the reliability is high, the design realizes the light quantization
2. Three-pass core tee and L type, long service life, large circulation capacity and small resistance
3. The ball valve can be divided into two types according to the action type, the single acting type is the condition that the ball valve will be in the control system when the power source fails.
The ball valve can be divided into one sheet, two pieces and three pieces.
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