HYDRAULIC OPERATED NEEDLE VALVE NGL
Range:
DN 100 – 1600
PN 10 - 16 - 25 – 40
The Hydraulic Operated NEEDLE VALVE NGL Valves is
generally installed in Hydropower plants, flood
control structures, irrigation facilities and free
discharge draining of dams or reservoirs.
Hydraulic actuator solutions:
• Single acting hydraulic piston with counterweight
• Double acting hydraulic piston
FEATURES
FEATURES
• Performance and design according to EN1074-5
• Face to Face dimension according to EN 558 e Series 15
• Flanges drilling in according to EN 1092-2 ISO 7005-2
• Hydraulic test in accordance with the prescriptions EN 1074 1 and 2, ISO 5208 and EN 12266 leak Rate A
• Marking according EN 19
• Full range of cylinder to avoid cavitation
• Hydraulic cylinder to maintain the main valve in closed position
• Counterweight connected to the hydraulic cylinder, sized to allow automatic opening of the valve under the heaviest condition
MATERIALS
MATERIALS
• Body ductile iron GJS500-7 EN 1563
• Shaft: AISI 420
• Shutter: AISI 304
• Seal: Elastomer EPDM
• Bush: Bronze CuSn12
• Cilinder: AISI 304 (optional)
• Counterweight: Carbon Steel epoxy coated
CORROSION PROTECTION
CORROSION PROTECTION
• Body and valve disc epoxy powder coated in every part in accordance with EN14901 layer thickness min. 250 μm