China Butterfly Valve- Concentric Butterfly Valve Flange Type

China Butterfly Valve

Concentric Butterfly Valve Flange Type

China Butterfly Valve- Concentric Butterfly Valve Flange Type design novel structure, the overall size is small, light weight; butterfly double eccentric, quick opening and closing, light and labor-saving operation; no friction between the butterfly plate and the seal, wear-resistant sealing surface, long life , Sealed, easy to adjust.

Nominal Diameter:         DN40–DN1800

Nominal Pressure:         10Bar/16Bar   

Design Standard:           BS EN593/BS5155/API609/DIN3354

FTF Dimension:              ISO 5752-13/BS EN558-13/API609

Flange Connection:       ASME B16.1 Class125/ASME B16.5 CL150/ASME B16.47 CL150/

                                         DIN 2501 PN10-16/EN1092 PN10-16/JIS10K  

Inspection and Test:      EN12266-1/API 598/ISO5208/JIS B2003   

Material List:                    

1. Body:

    Cast Iron                       ASTM A126 CL.B/ DIN1691 GG25   

    Ductile Iron                    ASTM A536 60-40-18/ DIN1693 GGG40   

    Carbon  Steel                ASTM A216 WCB   

    Stainless  Steel             ASTM A351 CF8/CF8M   

    Bronze AL-Bronze         ASTM B148 C954   

2. Disc:

    Ductile Iron                    ASTM A536 60-40-18/ DIN1693 GGG40   

    Carbon Steel                 ASTM A216 WCB   

    Stainless Steel              ASTM A351 CF8/CF8M   

    Bronze AL-Bronze         ASTM B148 C954   

    Coating                         Nickelplate/Epoxy/EPDM/VITON/Nylon   

3. Stem:

    Stainless Steel              ASTM A182 304/316/410   

    Alloy                              Monel K500   

4. Seat:

    Elastomer                     Working temperature   

    EPDM                           -45℃-135℃   

    NBR                              -10℃-80℃   

    VITON                           -20℃-150℃     

5. Bushing:

    PTFE   

    Bronze   

6. Pin:

    Stainless Steel              ASTM A182 304/316/410   

    Alloy                              Monel K500   

China Butterfly Valve Structure and Feature:

1. Bi-directional tightness.   

2. Small in size and light in weight. Easy installation and maintenance. It can be mounted wherever needed.   

3. Simple and compact construction, quick 90 degree on-off operation.   

4. Minimized operating torque, energy saving.   

5. Flow curve tending to straight line. Excellent regulation performance.   

6. Long service life. Standing the test of tens of thousands opening/closing operations.   

7. Bubbles-tight sealing with no leakage under the pressure test.   

8. Wide selection of materials, applicable for various medium.

China Butterfly Valve- Concentric Butterfly Valve Flange Type design is based on the principle of three eccentric structure, the use of the inherent cam effect, completely eliminating the 90-degree stroke in the seat and the seal between the full friction. Rubber soft seal butterfly valve design using a single eccentric structure, and the central line is different from the soft seal, disc rotation about 20 degrees, the valve seat and the seal quickly separated, thereby reducing friction.

China Butterfly Valves all the pictures in the article is original .If you want to copy it ,please ark the derivation！