Features:
1. Z7S43T type gate valve is driven by hydraulic pressure. When the system is working normally the gate opens and closes at uniform speed of 1.0m/min. While in the condition of power-off and other accident, the closing is parted in two steps from 100% to 205 close quickly ( in ten second), and 20% to zero slowly closing (in four second). This valve can be used as stop valve or check valve at the exit of pumps. This valve is also fitted with spindle locking device, to ensure safe operating.
2. Z9A43T type gate valve with 9ZD New-type electric actuator can be operated on site and remote controlled as well, it also satisfies computer control requirement accuracy safely and reliably.

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