Wafer vs. Lug Butterfly Valve-a Complete Guide!
Butterfly valve, also called flap valve, is a simple structure of the adjustment valve, that can be used in low pressure pipelines to shut off flow. Rotating around the valve shaft to achieve open and close a valve.
According to the different connection forms, it can be divided into wafer butterfly valve, lug butterfly valve, flange butterfly valve, welded butterfly valve, screw thread butterfly valve, clamp butterfly valve, and so on. Among the most commonly used connection forms are the wafer butterfly valve and lug butterfly valve.
Butterfly valve, also called flap valve, is a simple structure of the adjustment valve, that can be used in low pressure pipelines to shut off flow. Rotating around the valve shaft to achieve open and close a valve.
According to the different connection forms, it can be divided into wafer butterfly valve, lug butterfly valve, flange butterfly valve, welded butterfly valve, screw thread butterfly valve, clamp butterfly valve, and so on. Among the most commonly used connection forms are the wafer butterfly valve and lug butterfly valve.
Wafer Butterfly Valve vs. Lug Butterfly Valve In Outlook
1. Wafer Butterfly Valve
There is no flange on the valve body. Use stud bolts to penetrate the four connecting holes of the wafer butterfly valve, connect the valve between two pipe flanges, that is, two flanges clamp the butterfly valve in it, and then use bolts to fix the two flanges.
2. Lug Butterfly Valve
The connection of the lug butterfly valve is divided into two ways, one is through the pressure hole, and the installation method is the same as the butt butterfly valve, stability will be poor compared with the flange type connection; the second is the threaded hole type pressure hole, the installation method is different from the lug and flange type. At this time the pressure hole of the lug butterfly valve is equivalent to a nut, and the pipe flange connection, the bolt through the flange piece, directly tighten the lug butterfly valve.
The pressure hole of the lug butterfly valve can be tightened and the bolt at the flange end fixed with a nut. The flange end is fixed with a nut. The stability of such a connection is comparable to that of a flange butterfly valve.
Wafer vs Lug Butterfly Valve In Installation
The bolts paired with the wafer butterfly valves are relatively long and do not have flanges themselves, so generally do not install them at the end of the pipeline and downstream where they need to be dismantled because when the downstream flange is dismantled, the wafer butterfly valves will fall off so that the pipeline at both ends of the valve cannot work properly; and there is no such problem with the lug butterfly valve, the body has threaded screw holes, and when paired with the flange on the pipeline, it is connected with bolts and locked with nuts. So when one end is removed, it will not affect the operation of the other end.
The following video shows in detail the bolted connection methods of the wafer butterfly valve and lug butterfly.
Commonalities Between The Wafer And Lug Butterfly Valves.
1. Can be used to throttle fluid flow and allow easy control of flow.
2. Suitable for use in medium to high temperature and low pressure applications.
3. Lightweight and compact design requiring less installation space. 4.
4. Fast operating times, ideal for emergency shut-offs.
5. Actuators are available in lever, worm gear, electric, pneumatic, hydraulic, and electro-hydraulic versions, allowing for remote control and automated operation.
Buy Butterfly Vave or Ask for a Qoute
ZhongFa Valve can supply different materials for different pressures and temperatures for both the wafer and lug butterfly valves, please feel free to contact us if you have any further questions about our products.
