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Lugged Design, Tapped To Suit AS Table E Resilient Seated Butterfly Valve
Water Authority approved Butterfly Valves. A fully lugged/tapped valve to AS4087 Class 16 (AS2129 Table “D”).
The size range has been extended and we can now offer valves up to & including 20″ (DN500)
*Approvals vary from State to State-check with us regarding acceptance by your local authority
This model is available now and includes the following features:
-Superior Coating (Nylon 11, 250 microns)
-New “K” Lever (improved notchplate & trigger mechanism)
-Lockable
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.
Materials
Dimensions
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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
Water Type
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.
Seat Types
Butterfly valves can be metal-to-metal seated, soft seated, or with a fully lined body and disc.
The first image is of a soft seated fully lined body and disc valve. Second, is a soft seat with metal disk
and the third is metal to metal seat type valve.
