Wafer type butterfly valve

1. PROFUCT PROFILE

Flanged concentric butterfly valve is one type of central lined flanged type butterfly valve, which is the most common type of butterfly valve. Rubber lined butterfly valve is with the central disc and bonded liner. It is featured with a higher strength body and better pressure resistance as safely factor. Prosper Flow can manufacture the double flanged type rubber lined butterfly valve according to AWWA C504 and EN593 with flanged ends of ANSI B16.5, DIN 2501, BS 4504, GB 17241.6, JIS10K, etc.

2. FEATURES

· Novel and reasonable design,special structure,light, Easy instllation and mintenance.It can be mounted wherever needed.
· Tiny operative moment,quick 90 degrees on-off operation.
· Miniminzed operating torque,energy saving.
· Flow curve tending to straight line.Excellent regulation performance.
· Long servie life.Standing the test of tens of thousands opening/closing operation.
· Bubbles-tight sealing with no leakage under the pressure test.
· Wide selection of materials, applicable for various medeium.

3. TECHNICAL SPECIFICATION

· ANSI 125/150LB, PN1.0/PN1.6MPa

· Size: 2″~24″ (50~600mm)

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

· Epoxy coating with thickness ≥ 250μm

· Working temperature: 0℃~+80℃

4. STANDARD

· Design & manufacturing: GB12238, AWWA C504, EN593

· Face to face: ISO 5752, AWWA C504, GB12221, EN558-1, ANSI B16.10

· Flanged ends: ANSI B16.5 ANSI 125/150; EN1092-2, DIN 2501 / BS 4504

· Top flange: ISO 5211

· Inspection & testing: API598

5. APPLICATION

· Water works, water projects

· Environment protection

· Public facilities

· Power plant

· Real estate

· Petroleum, chemical industry

· Steel work, metallurgy

· Water treatment plant

How Does Concentric Butterfly Valve Work?

Concentric butterfly valves have a relatively simpler design. The body, seal, disc, and stem are the main parts of the concentric butterfly valve. The traditional butterfly valve has a disk located in the middle of the attached pipe and a stem is connected to the actuator or handle on the outside of the valve. When the valve is in a closed position, the disk is perpendicular to the flow and the seat of the valve is shut. The stem is sealed with an O-ring. When the valve makes a turn of 90 degree with the help of actuator or handle, the disk travels away from the valve seat and is located parallel to the flow. The rotation at an angle less than 90-degrees allows the flow to be either throttled or proportional.