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Resilient seated butterfly valves wafer type
Main Features of NORTECH resilient seated butterfly valves
- Compact construction results in low weight, less space in storage and installation.
- Centric shaft position,100% bi-directional bubble tightness,which makes installation acceptable at any direction.
- Full bore body gives low resistance to flow.
- No cavities in the flow passage,which makes it easy to clean and disinfect for potable water system etc.
- Rubber lined internally in the body makes fluid not to contact the body.
- Pinless disc design is helpful to prevent the leakage point on the disc.
- ISO 5211 top flange is convinient for easy automation and retrofitting of actuator.
- Low operating torques results in easy operation and economical actuator selection.
- PTFE lined bearings are disigned for anti-friction and wear,no lubrication is required.
- Inserted lining to the body, liner easy to replace,no corrosion between body and lining, suitable for end of line use.
| Structures of the pinless disc design. | |
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| inserted rubber liner | |
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| splined shaft/pinless disc(DN40-DN350) | |
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| hexagonal shaft/pinless disc(DN400+) | |
Technical Specifications
- Design and manufacturer according to API609/EN593
- Face to face to ISO5752/EN558-1 series 20
- Flange end to EN1092-2 PN6/10/16/25
- Pressure rating PN10/16/25,Class125/150.
- Test and inspection to API598/EN12266-1/ISO5208
- Actuator mounting pad to ISO5211
Parts materials of the resilient seated butterfly valves
Body
- ductile iron GGG40,GGG40.3,GGG50,EN GS 400-15,ASTM A536 60-40-12
- stainless steel CF8,CF8M,CF3M,904L
- alu-bronze C95400,C95800
Disc
- ductile iron GGG40,GGG40.3,GGG50,EN GS 400-15,ASTM A536 60-40-12
- stainless steel CF8,CF8M,CF3M,904L,
- alu-bronze C95400,C95800
- Monel,Hastelloy
Seat(rubber liner)
- EPDM(High temperare),EPDM(sanitary WRAS,ACS),NBR,VITON(FKM),Silicone
Shaft
- SS420,SS431,SS316,Monel
Type of Operation for the butterfly valves
- Handle lever for resilient butterfly valves DN40-DN200.
- Manual gearbox operator for the full range butterfly valves.
- Pneumatic actuator for full range of butterfly valves
- Electric actuator for full range of butterfly valves
- Free stem without actuator,customized for clients with your own actuators.
Related articles:
- Differences between the resilient and metal seated butterfly valves
- Temperature range of different rubber seat
- ISO5211 mounting pad standard
- Catalogue download of resilient butterfly valves
