China Butterfly Valve-Double Flanged Butterfly Valve Features:
Reduce the turning moment, support the valve stem, and effectively separate it from the valve body to reduce the wear of the valve stem.
After polishing, and seat precision with.
Achieve leak tightness test zero leakage requirements, opening and closing torque is small, extending the life of the valve seat.
Stem seal is not easy to deform, thus avoiding the usual stem leakage.
High precision, high strength, suitable for handle and other control device installation.
Firmly connect stem and valve plate, with anti-vibration features, and easy to replace.
Good overall, easy to control the valve opening and closing.
With non-shedding, tensile, leak-proof, easy to replace and so on.
Product Details: Double Flanged Butterfly Valve Calculation Type
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