What is a lug on a valve?

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. They are sandwiched between the flanges on the ends two lengths of pipe.

What are the parts of a butterfly valve?

The butterfly valve consists of only four main components: body, disk, stem and seat. Body. Butterfly valves generally have bodies that fit between two pipe flanges. The most common body designs are lug and wafer.

What is the function of a butterfly valve?

A butterfly valve regulates flow by starting, slowing, or stopping media. The disk opens and closes with a low-torque rotation of 90 degrees and works for any compatible application. Because they cost less and are lighter weight, the butterfly valve is often preferred over other types of valves.

What are the different types of butterfly valves?

There are 3 main categories of butterfly valves: Rubber-lined, Plastic-lined, and Metal.

What type of motion control is involved in butterfly valve?

quarter-turn rotational motion valve
A Butterfly valve is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow. Butterfly valves are easy and fast to open. A 90° rotation of the handle provides a complete closure or opening of the valve.

Where is the application of butterfly valve?

Butterfly valves are used where space is limited. Unlike gate valves, butterfly valves can be used for throttling or regulating flow as well as in the full open and fully closed position. The pressure loss through a butterfly valve is small in comparison with the gate valve.

What type of valve is butterfly valve?

quarter-turn valves
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.

Where do you put a butterfly valve?

Valve Location

1. Butterfly valves should be installed if possible a minimum of 6 pipe diameters from other line elements, i.e. elbows, pumps, valves, etc.
2. Where the Butterfly valve is connected to a check valve or pump, keep enough space between them to ensure the disc does not interfere with the adjacent equipment.