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DESCRIPTIONProduct details
Features
- The raised-seat design guides flow around the control disc, reducing the risk of cavitation and damage to the disc and valve seat.
- The parabolic control-disc profile provides smooth regulation close to the closed position, improving control performance at low flow rates.
- The offset stem position in the rubber diaphragm reduces pressure forces near the closed position.
- The ductile-iron valve body and bonnet are coated with 300 μm blue RAL 5017 fusion-bonded epoxy in accordance with DIN 3476, using a process approved to GSK and WRAS-DVGW/W270/UBA requirements.
- All rubber components are approved for drinking-water applications.
- All uncoated internal components are made of stainless steel or copper alloy.
- The seat, pilot valve, tubing and tube fittings are made of AISI 304 stainless steel.
- A needle valve is fitted between the upstream side and the control chamber to adjust response time.
- Closing the needle valve isolates the control chamber and locks the main valve in position, allowing pilot-valve maintenance and service.
- Integrated lifting points are provided on sizes DN150 and above for easier handling and installation.
Component
1. Seal EPDM rubber 2. Pin seal EPDM rubber 3. Washer Stainless steel A2 4. Diaphragm EPDM rubber 5. Bolt Stainless steel A2 6. Nut Stainless steel A2 7. Stem Stainless steel 431 8. Stem guide Stainless steel 304 9. Bonnet Ductile iron GJS-500-7 (GGG-50) 10. Spring Stainless steel 304 11. Washer Copper alloy CC499K 12. Diaphragm support Ductile iron GJS-500-7 (GGG-50) 13. Disc stop Ductile iron GJS-500-7 (GGG-50) 14. Control plug Stainless steel 304 15. Seat Stainless steel 304 16. Valve body Ductile iron GJS-500-7 (GGG-50) 17. Strainer Stainless steel 304 18. Pin Stainless steel 304 19. Pilot valve Stainless steel 304 20. Needle valve Stainless steel 304 21. Stainless steel 304 Standards
- Designed to EN 1074-5
- Face-to-face dimensions to EN 558 Table 2 Series 1
- Flange drilling to EN 1092-2 (ISO 7005-2), PN10/16
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