BALL VALVE OVERHAUL

In 2021 Tenconi SA carried out the overhaul of the spherical valve and dismantling pipe at the Luzzone hydroelectric power station.

First, the valve was disassembled and cleaned. Then, all components were repaired, repainted and reassembled in their original position.

This was followed by a pressure test of the valve and finally by testing it in presence of the customer.

Work performed

• Valve disassembling and cleaning

• Non-destructive testing

• Repair of defects

• Restoration of the anticorrosive treatment

• Supply of new stainless steel sealing rings

• Complete restoration of the insertion ring

• Reassembly with gasket replacement

• Valve pressure operation tests

• Testing in the presence of the customer

Technical characteristics

• NPS: 1'100 mm

• Rated pressure: 22.5 bar

• Weight: 12'700 kg (valve)