That is, the butterfly valve that can ensure sealing when closed is used for cutting off on the pipeline.
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What is an unsealed butterfly valve?
That is, the butterfly valve that cannot be fully sealed when closed is usually used as a regulating valve on the pipeline.
The sealing structure of sealed butterfly valve can be divided into forced seal and self pressure seal. What is the difference between the two seals?
Forced sealing: the butterfly disc and the seal seat are sealed by the external force.
Self pressure sealing: after the butterfly disc is closed in place under external force, the sealing seat and the butterfly plate are tightly contacted by the medium to seal
What is the structure of triple -offset butterfly valve?
Offest 1: The shaft is offest behind the seat axis to allow complete sealing contact around the entire seat.
Offest 2: The shaft center line is offset from the pipe and valve which provides interference free opening and closing of the valve.
Offest 3: The seat cone axis is offset from the shaft center line to eliminate friction during closing and opening and to achieve uniform compressive sealing around the entire seat.
Can the triple eccentric butterfly valve be sealed in bi-directional?
Yes, it can be made in bi-directional.
What is advantages of triple eccentric butterfly valve?
The utility model eliminates the abrasion between the sealing surfaces, maintains the integrity of the sealing surfaces and has a long service life. It eliminates the binding when the valve seat and valve disc are wedged and combined, ensuring zero leakage, fluid efficiency and reducing maintenance costs.
What’s main features of check valve?
Installed at the outlet end of the pump or compressor.
What’s Sealing principle of check valve?
The valve disc rotating around the fixed axis can be automatically opened and closed by the medium force (or by increasing the auxiliary external force).
What’s main purpose of check valve?
Prevent media from flowing back.
Which media is the check valve applicable to?
It is suitable for clean media, not media containing solid particles and high viscosity.
What is a swing check valve?
The swing check valve adopts a built-in rocker swing structure. All the opening and closing parts of the valve are installed inside the valve body without penetrating the valve body. Except for the sealing gasket and sealing ring used at the middle flange, there is no external leakage point on the whole, so as to eliminate the possibility of valve leakage
What’s structural characteristics of wafer check valve?
The structure is short in length, small in volume, light in weight, fast in closing the valve plate, and low in water hammer pressure. The flow passage is smooth, the fluid resistance is small, the valve disc is short, and the closing impact is small.
