Litostroj Power products

Design principle and range of use: Pump-turbines are used in pumped-storage hydropower plants (PSP). Their role in the electrical grid system is to store non used energy by transforming it to the potential energy of water. Pump-turbines can work either as a pump to store water in an upper reservoir or as a turbine to use the water to generate power. An additional role of pump-turbines and PSP systems in recent years has been balancing and stabilization of the electrical grid. Litostroj Power provides state-of-the-art solutions tailored to customers’ demands in the most various environments. In order to achieve high efficiency and a wide operating range in both the pump and turbine regimes all machines are hydraulically optimized and model tested in Litostroj Power’s hydraulic laboratory.

Design principle and range of use: Radial-flow pump is used for pumping a low or medium flow rate at a higher delivery head. They are typically used for lift irrigation and drainage of agricultural lands, sewage applications, cooling water for thermal and nuclear power plants, handling sea water, fresh water supply, boiler feed, mine dewatering or other applications. General description & our setup: Radial-flow pumps are usually supplied in horizontal configuration, vertical design is available as an option. The pump rotor is a single or double-suction radial-flow impeller with fixed blades.

Design principle and range of use: Mixed-flow pump is used for pumping a medium or high flow rate at a medium delivery head. It is typically used for lift irrigation and drainage of agricultural lands, sewage applications, cooling water for thermal and nuclear power plants, handling sea water, industrial applications and water supply.

Design principle and range of use: Axial-flow pump is a propeller pump used for pumping a high flow rate at a smaller delivery head. It is typically used for lift irrigation and drainage of agricultural lands, sewage applications, cooling water for thermal or nuclear power plants, handling sea water, flood control, filling or emptying of dry docks.

The function of the penstock and main inlet valves is to isolate the unit and completely cut-off the water flow on the location where such valve is installed. The usual types of such valves are spherical valves and butterfly valves. They usually serve as a safety device and are capable of closing at the maximum water discharge. Main inlet valves are positioned between the penstock and the turbine spiral case, while the penstock valves can be located anywhere inside the penstock.

Energy dissipating system (EDS) is designed to divert the water and serves as a turbine bypass system. EDS systems can be used either as a pressure relief valve (PRV) to mitigate a penstock transient phenomenon or as a long-term energy dissipation system used for flow ramping or maintaining the flow in the penstock system when the turbines are out of operation. Litostroj Power is able to advise and design optimal PRV or EDS solutions based on the site conditions and ramping requirements. We have long tradition in design and installation of both systems, PRV as well as EDS valves. Our largest PRVs are installed on 80 MW Francis units as a penstock overpressure safety device.