Foto: GLA-WEL | Waste Water Technology – Stop Logs
In wastewater technology, shut-off valves are classified according to various characteristics. Penstocks often have manual, automatic oder electric drives. The distinctive features of our penstocks are, for example: the type of application, the pressure direction and the design criteria.
Type of application
- Shut-off, i. e. penstock, handstop, flap valve, dam board, stop log
- Flow control, throttle penstock, weir gate, weir penstock, channel gate
- Distribute, i. e. diverter gate
Pressure direction
- Front side pressure: Sealing effect is supported by water pressure or closing plate is pressed against the sealing surface by water pressure
- Rear side pressure: Sealing effect is reduced by water pressure or closing plate is pressed away from the sealing surface by water pressure
Design Criteria
- Penstock: 4-face seal
- Channel penstock: 3-face seal
- Weir penstock: opening by means of downward operation; flow control and shut-off
- Handstop with 3 facings: only for small conduits; manual operation
- Dam board, stop log: 3 or 4 facings shut-off device. Closure by means of dead weight and pressure equalization, serves only as auxiliary shut-off device
- Waste weir: flap gate for level-control and discharge
- Flap valve: prevents back flow of water
Diverter gate: distribution device for diverting one main flow into two partial flows; carried out as vertical slewing gate - Telescopic slide gate: by means of inlet- / outlet pipe; for level-control and drainage
