Power Supplies
Description
Introduction for valve of hydropower station:
Valve is the control device of fluid pipe and its basic function is to connect or cut off the medium circulation inside pipeline, change the circulation and flow direction of medium, adjust pressure and flow of medium, protect the normal operation of pipeline equipments. Valve is an important control component of the pipeline.
The common inlet valve for hydro turbine: gate valve, butterfly valve and spherical valve.
The main valve equipments in hydropower station are the inlet butterfly valve or inlet spherical valve for turbine and the supporting expansion joint etc; Of course other ordinary valves (like buttery valve, gate valve and check valve) are also used a lot.
Type and features for valve of hydropower station:
Butterfly Valve Series
Nominal diameter:DN100~DN4600
Nominal pressure:PN0.25~4.0MP
Design and MFG. standard:GB/T 122387-89
Structure size standard: GB12221-89
Flange standard:GB9113-2000, GB17241.6-1998
Test standard:GB/T 13927-92
Structure type:Lever type, Vertical plate, Inclined plate
Operated type:Manual, Worm gear, Electric, Pneumatic, Hydraulic, Electro-hydraulic linkage
Spherical Valve Series
Nominal diameter:DN300~DN2000
Nominal pressure:PN2.5~14 MPa
Design and MFG. standard:GB12237, AP16D
Structure size standard: GB12221, ANSI B16.10
Flange standard:GB9113 JB/T79 , ANSI B16.5
Pressure temperature rating:GB9131, ANSI B16.34
Standard of welding ends:GB12224, ANSI16.25
Test standard:GB/T13927, JB/T9092-99, API598
Structure type:Fixed, Floating, Flexible, Straight-through, Three-way, Right angle
Operated type:Lever, Gear, Pneumatic, Electric
Gate Valve Series
Nominal diameter:DN15~DN1200
Nominal pressure:PN0.25~16.0MPa
Design and MFG. standard:GB12234-89
Structure size standard: GB12221-89
Flange standard:JB/T79-94
Test standard:GB13927
Structure type:Wedge type, Flat type, Rising stem, The dark bar
Operated type:Handwheel, Bevel gear, Pneumatic, Electric
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