| 摘要 |
A hydraulic drive system for fire stop gates, comprising an actuator device or group (AT) adapted for the opening of the fire stop gate, while the closing is controlled by means of a compensated deceleration valve (VRC1) which permits closing the gate at a minimum constant speed in case of alarm and/or with the absence of mains power supply, while maintaining all of the standard operating characteristics of the gate, even in the case wherein the same is automatised. |
