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.Jun 25, 2020
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 butterfly valve used for?
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 are the three types of butterfly valves?
- Used for very-high-pressure applications.
- Because most plastic lined valves are limited to PN10/16 (150#) flanges, this type is rarely seen with plastic-lined valves.
- Garlock does not offer this type of valve.
What makes a butterfly valve high performance?
High Performance Butterfly Valves use a disc offset from the seat center, hence the name Double Offset. In this configuration, the disc is eccentric, or offset, from the valve seat. ... This feature allows the use of offset butterfly valves in high‐pressure applications such as ethanol or HVAC.Nov 9, 2017
How do I choose a butterfly valve?
- Wafer lug or grooved end connections.
- Press-to-connect ends selection.
- Broad range of sizes.
- Lug or wafer types.
- Ductile iron, cast iron, CPVC materials.
- Lead-free* selection.
- Fire protection selection.
- High performance selection.
What are the advantages of butterfly valves?
- Narrow profile.
- Can install/remove without pipe system dislocation.
- Ability to throttle flow.
- Variety of actuation methods available.
- Available in large diameters.
- A variety of seat and disc materials.
- Full stainless steel bodies available.
- Lightweight aluminum bodies available.
What is Category A butterfly valve?
Category A valves are "concentric" type. Also known as rubber lined butterfly valves. These are popular in low pressure systems (Class 150 or less), relatively lower cycle life, rubber liners are also good for abrasive slurry services.Mar 10, 2019
What is an AWWA valve?
Butterfly valves are used to prevent and isolate the flow of fluid in industrial sectors. They are easy to handle and very fast in stopping the flow. ... Awwa butterfly valve doesn't leak from anywhere and won't damage by corrosion.Jun 13, 2016
What is butterfly valve good for?
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.Apr 1, 2021
What is concentric butterfly valve?
On a centric (concentric) butterfly valve the stem is centered in the middle of the disc and the disc centered in the bore. The eccentric butterfly valve has one or more stems (stub shafts) located offset from the center according to the categories of double and triple offset valves.
What is the disadvantage of butterfly valve?
Disadvantages of a Butterfly Valve One disadvantage of butterfly valves is that some portion of the disc is always presented to the flow, even when fully opened. The use of a butterfly valve therefore always results in a pressure switch across the valve, regardless of the setting.
What are the advantages and disadvantages of butterfly valve?
In addition to advantages, there are slight disadvantages of butterfly valves like: A certain part of the disc always faces the flow, even when completely opened. The operation of a butterfly valve thus always leads to a pressure switch over the valve irrespective of the setting. It has a poor sealing function.