SS316L 1" 150LB Flanged type Stainless Steel Wafer Butterfly Valve
A Butterfly valve is a quarter-turn rotary motion valve, that is used to stop, regulate, and start the flow. Butterfly valves are a quick open type. A 90° rotation of the handle can completely close or open the valve. Normally, they are used in systems where a positive shut-off is not required. In this article, you will learn about following types of Valve.
Large Butterfly valves are usually equipped with gearbox type actuator, where the handwheel is connected to the stem via a gearbox. This will reduce the force but at the same time reduce the speed of the operation. This type of valve should be installed in the open position. If the valve is closed during installation, the rubber seat will wedge against the valve disc and make it difficult to open.
Types of Butterfly Valves Based on Body Construction
Based on the type of ends of the body butterfly valves are available in following types.
Both Flanged Ends
Wafer Type Ends
Lug Type Ends
Butt Welded Types Ends
The wafer body is placed between pipe flanges, and the flange bolts surround the valve body.
A wafer type butterfly valve is easy to installed but it cannot be used as an isolation valve.
The lug body has protruding lugs in the periphery of a body that provides passage to bolt holes that match with those in the flanges.
In this types, the body has flanged that match with pipe flange dimension.
Butt Welded Ends Types
This types of ends are used in high-pressure services and it directly welded to the pipe.
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