The oil injection solenoid valve 2YV is used in the steam turbine oil injection test device. Due to the fact that the mechanical overspeed of the steam turbine is composed of springs and flying hammers in its protective action circuit, in order to prevent rusting and jamming of the flying hammers during unit operation, regular oil injection tests are required to ensure the correct and reliable operation of the mechanical overspeed protection.

Principle of steam turbine oil injection test: Conduct oil injection test (oil injection pressure test) when the unit speed is 3000r/min. Move the test lever to the “test” position (left side) and hold it still.

At this point, the mechanical overspeed and manual trip oil drain ports are closed, and the injection oil solenoid valve 2YV is slowly opened to inject pressure oil into the bottom of the eccentric flying hammer of the mechanical overspeed protection device. When the sum of pressure oil and centrifugal force exceeds the spring force, the flying hammer strikes and hits the hook, causing the emergency trip spool valve to act and reset the oil pressure to zero.

Due to the blockage of the oil discharge port by the test slide valve, the oil pressure of the diaphragm valve remained unchanged, and the unit was still able to maintain 3000r/min. After the test is completed, close the test valve, and after re-hooking, reset the oil pressure to normal. The test slide valve can be released and turned to the normal position.
Besides of the 2YV solenoid valve, there are many other types of solenoid valve used in steam turbine, such as:
Directional Vavle 4WE6Y6X/EG220NZ4/B08V
Solenoid Valve Manufacturers CAP230M
Solenoid Valve Dc 12v CCP230M
Solenoid Valve Flow Direction D3DW20BVZP40*B510
Solenoid Operated Hydraulic Control Valve DG4-3-2A-VM-U-SA7-60
2 2 Dc Valve D1VW004CNJW91
HP Solenoid Valve DG4V-3S-2C-M-FW-H5-60
Double Solenoid Directional Control Valve D1VW20BVZP92XB510
Bi Directional Solenoid Valve 4WE6Y-L6X/EW220-50NZ4-V/B08
Solenoid Diverter Valve GS060600V
Coil Solenoid Valve 24vdc GS061600V
Solenoid Dc Valve DG4V-3-6C-M-U-D6-60
Hydraulic Solenoid Valve Coil SV1-10V-CD-240AG
Solenoid Operated Hydraulic Control Valve DG48459-2000
Solenoid Operated Valve 6YV
Solenoid Valve Parts 7YV