What is the difference between a lug type butterfly valve and wafer?
Lug type valve as the name suggests has lugs that are used to mount the valve to lugs that are attached the flanges on then ends of sections of pipe so that each length of pipe can be removed and replaced independently. Wafer type valves don’t have attachment lugs, though them may have alignment lugs.
What is a wafer valve?
Wafer-Style Butterfly Valve Most wafer-style butterfly valves are engineered with four holes that align with the connected pipeline. The valve is designed to clamp between two flanges in your pipe work. Most wafer butterfly valves fit the majority of flange standards.
What is a wafer connection?
In a wafer connection the valve is installed between the pipe flanges and tightened to its place with the bolts for the pipe flanges. In some wafer types there are some centering holes on the body to ensure valve’s correct position between the flanges.
What does NPT stand for in valves?
National Pipe Thread
NPT. NPT stands for National Pipe Thread and is an American standard thread. It may also be reffered to as MPT , MNPT or NPT (M) for male external threads and FPT, FNPT or NPT(F) for female interal threads. A thread sealant must always be used to achieve a leak free seal (except for NPTF).
Can butterfly valves be installed vertically?
The butterfly valve can be installed at any position (vertical, horizontal or tilt). Avoid butterfly valve disc from bumping to hard objects and it should be open at 4 ° to 5 ° angle position in order to maintain sealing surface from damaging during this period.
Can butterfly valves be installed upside down?
Can the butterfly valve be installed upside down? The answer is no. The reason is very simple. Prior to installation, the inside of the pipeline inside the butterfly valve body should be cleaned to ensure that the media flow space is clean and free of impurities.
What is the wafer butterfly valve?
Wafer butterfly valve is to connect the valve between two pipe flanges with stud bolts. The flange butterfly valve is a valve with flange, and the flange on both ends of the valve is connected to the pipe flange with bolts.
What is wafer check valve?
A wafer check valve is a specific style of non return valve in the check valve family. Like the other products in its group, the wafer check valve is employed in regulating the unidirectional flow of liquids, gas and solids without allowing any backflow of the process stream to contaminate the original source.
What is a lug butterfly valve?
Lug Butterfly Valve. The lug version of the butterfly valve’s design is similar to a 3-piece ball valve in that one end of the line can be taken off without having an effect on the opposing side.
What is a butterfly valve?
A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The “butterfly” is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway.