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Wafer type butterfly valve is one type of central lined butterfly valve, which is one normal type of butterfly valve in need of big quantity. It is mounted between two matching flanges of the piping with bolts & nuts. According to actual piping conditions, wafer type butterfly valve can be manufactured according to different flanges standards, such as ASMEB16.1, EN1092, AS2129, DIN2501, BS4504, JIS10K. Wafer butterfly valve can be mounted on the piping end as exhaust valve. Prosper Flow can produce the wafer butterfly valve rubber lined in accordance with EN593, API609 and AMSE B16.34.

What is the difference between lug and wafer butterfly valves?

The difference between a Wafer and Lug type Butterfly valve is only the mounting scheme [1] and [2]. ... Wafer type valves don't have attachment lugs, though them may have alignment lugs. They are sandwiched between the flanges on the ends two lengths of pipe.

What is the function of a butterfly valve?

The main function of these valves is to control the flow of liquids through a section of pipe. Butterfly valves are mainly used in waste treatment systems. They are extremely durable and need minimal maintenance. Butterfly valves operate like other quarter turn valves.

1. FEATURES

· Simple and compact construction

· Small in size and light in weight

· Quick 90° on-off operation, low torque

· Good sealing capability, no leakage

2. TECHNICAL SPECIFICATION

· PN10 / PN16 / 125LB / 150LB / JIS10K / 150PSI / 200PSI

· Size: 1-1/2″~40″ (40~1000mm)

· Materials: A126 B (GG25), A536 65-45-12 (GGG40/50)

· Epoxy coating with thickness ≥ 250μm

· Working temperature: 0℃~+80℃

3. STANDARD

· Design & manufacturing: ASME B16.34, EN593, API609

· Face to face: ANSI B16.10, EN 558-1, API609

· Matching flanges: ANSI B16.1, EN 1092, JIS10K, AS 2129

· Top flange: ISO 5211

· Inspection & testing: API598

4. APPLICATION

1.Water works, water projects
2.Environment protection
3.Public facilities
4.Power plant
5.Real estate
6.Petroleum, chemical industry
7.Steel work, metallurgy
8.Paper plant
9.Food & beverage
10.Water treatment plant

What is a lug style butterfly valve?

Lug-style valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and no nuts. The valve is installed between two flanges using a separate set of bolts for each flange.