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 | |
| Globe Valve Series | Nominal diameter: | DN15~DN1500 |
| Nominal pressure: | PN1.6~16.0Mpa | |
| Design and MFG. standard: | GB12235 | |
| Structure size standard: | GB12221 | |
| Flange standard: | JB/T79 GB9113 HG20593-20635 | |
| Pressure temperature rating: | GB9131 JB/T74 HG20604 | |
| Test standard: | GB13927 JB/T9092 | |
| Structure type: | Straight-through, Angle type, DC type | |
| Operated type: | Handwheel, Bevel gear, Pneumatic, Electric | |
| Check Valve Series | Nominal diameter: | DN15~DN900 |
| Nominal pressure: | PN26.0~42.0MPa | |
| Design and MFG. standard: | ANSIB16.34, E101 | |
| Structure size standard: | ASME B16.10 E101 | |
| Pressure temperature rating: | ASME B16.34 E101 | |
| Test standard: | API598 E101 | |
| Structure type: | Regular pattern, Pressure sealed pattern, Damping pattern | |
| Pressure Reducing Valve Series | Nominal diameter: | DN15~DN600 |
| Nominal pressure: | PN1.0~6.4MPa | |
| Design and MFG. standard: | GB/T 3656-1994 | |
| Structure size standard: | GB/T 12221-2005 | |
| Pressure temperature rating: | GB/T 12224-2005 | |
| Test standard: | GB/T 13927-2008 | |
| Operated type: | Manual, Worm gear, Pneumatic, Electric |
