Ductile Iron Wafer Worm Gear Box Butterfly Valve

Ductile Iron Wafer Worm Gear Box Butterfly Valve 

Adoption standard

Design standard: ISO10631-1994 or BS EN593-1998

Flange connection dimension:ISO 7005-2 or BSEN1092-2002

Structure length: ISO5752-1988 or BS EN558-1

Pressure test: ISO5028-1993 or BS6755-I-1986

Size: DN40-600mm

Rating: PN10/16, ANSI125/150

Design Standard: API609;

Material of main parts:

Body: Cast iron, ductile iron, stainless steel, cast steel (WCB) ,GGG40

Disc: Monel, ductile iron, stainless steel, ductile iron with nylon coated

Seat: EPDM or NBR or PTFE

Body Flange Drilling Body:DIN2505;ANSI125/150;BS4504;JIS B2210;AS2129;GB17241.6

Tope Flange: ISO5211

Face to Face: ISO5752;API609;MSS SP-67;GB12221

Test Inspection: API598;GB13927

Suitable Medium: Water,Sewage,Air,Oil,Salty,etc.

Operations: lever, Worm gear, Electric Actuator and Pneumatic

Butterfly valve seal material choice and apporpriate tempersture

Note:

1.All of our butterfly valves are backed by 24 months guarantee. 

2.We can match the different rubber ring according to the different medium conditions, such as NBR ,PTFE, CSM, EPDM, CR,Viton and other rubber materials.

3.We can match different materials about body, plate and stem, such as ductile iron, cast steel, stainless steel 304,316,316L according to special working condition.

4.If the valve leakage after two years service, just remove handle then add a bushing to prevent leakage , need not disassemble the valve or change a new one, very economic.