Factory Wholesale Ductile Iron Flanged Concentric 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

· Small in size&light in weight and easy maintenance. It can be mounted wherever needed.
· Simple, compact structure, quick 90 degree on-off operation·
· Disc has two-way bearing, perfect seal, without leakage under the pressure test.
· Flow curve tending to straight-line. Excellent regulation performance.
· Various kinds of materials, applicable to different media.
· Strong wash and brush resistance, and can fit to bad working condition.
· Center plate structure, small torque of open and close.
· Long service life. Standing the test of ten thousands opening and closing opration.
· Can be used in cutting off and regulating media.

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.