hydraulic hydroturbine main inlet butterfly valve

hydraulic hydroturbine main inlet butterfly valve

The hydraulic hydroturbine main inlet butterfly valve ARL-HMIBV is a full set of butterfly valve usually used in hydro power stations for safety purpose. Engineered to function reliably in critical environments, the hydraulic hydroturbine main inlet butterfly valve ARL-HMIBV features a robust design capable of closing against maximum head and flow through the valve. It is specifically bored to reduce head loss to a minimum, with the head loss across the valve stated and guaranteed. This comprehensive system comes complete along with servomotors, counter weights, lever arm assembly, bypass valve, differential pressure switch, electrical control panel, upstream/downstream connecting pipe pieces for joining with the penstocks, and dismantling joint etc. required to make a complete unit.

Key Features:

• Capable of closing against maximum head and flow through the valve
• Bored to reduce head loss to a minimum and the head loss across the valve is stated and guaranteed
• Safe emergency closure in case of turbine going to runaway speed (failure of governor), with the help of counterweights
• Opening operation of the MIV carried out by pressure oil operated servo motors, with pressure oil supplied from the governor OPU
• Normal position of valve disc in open position is horizontal and in closed position vertical, keeping the valve either in fully open or fully closed position depending upon operating requirements
• Normally the opening and closing of the MIV will be done under balanced water conditions; also designed to close in the shortest possible time under unbalance condition for the expected water flow considering the bursting of the largest tap-off among various tap-offs on the penstock
• Complete along with servomotors, counter weights, lever arm assembly, bypass valve, differential pressure switch, electrical control panel, upstream/downstream connecting pipe pieces for joining with the penstocks, dismantling joint etc. required to make a complete unit
• Complete set includes: main butterfly valve, hydraulic power station, expansion coupling, two ends connection pipeline, bypass system, air valve, and draining valve

Technical Specifications:

• Size Range: DN: DN500 ~ DN3500
• Pressure Range: PN: PN2.5 ~ PN40
• Full State Minimum Flow Resistance Coefficient: 0.1
• Power Supply: AC220V, DC220V, DC110V, DC24V
• Medium: clean water, water with sand, sea water, oil etc. non-corrosive fluid
• Medium Temperature: ≤80℃
• Primary Application: Used in hydro power stations for safety purpose

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