F.Nencini Srl products

Used as turbine by-pass or to draw the water from dams. They reduce the excess head of the inflow, discharging a tamed outflow into the stilling basin and then into the downstream channel. We also design and engineer the stilling well related to the valve.

They allow a very high upstream pressure loss, without any risk of critical phenomena (cavitation, vibration, noise) even with little downstream head pressure. They are also used as synchronous discharge tool for turbine plants (mainly Pelton or Francis turbines) because they are able to work in high pressure condition. The discharge is carried out under high head loss across of the valve.

Mainly used in hydroelectric power plants when high values of flow rate speed and/or pressure rating are required. The main feature of the valves we produce is the actuation of the two movable seal rings, one on upstream and one on downstream side of the valves. They ensure the perfect tightness of the valve and in the same time the upstream one can be used as maintenance tool to work on the downstream one.