HYDRAULIC KIT
The rupture valve R 10 can be mounted in any position directly onto the cylinder inlet connection Z. In the event of failure in the main cylinder line or where the down speed exceeds allowable limits, the R 10 valve closes, bringing the car to a smooth stop. When the down flow is approximately equal to the adjusted closing flow, the R 10 will take several seconds to close. When the down flow is in great excess of the adjusted closing flow, the R10 will close in 1-2 seconds.
Features:- Hand pump H 11 and H 12 pumps are for application with hydraulic lifting or pressing equipment, for emergency operation of hydraulic elevators and for the pressure testing of hydraulic systems in general. The H 11 is constructed for side mounting. The H 12 is fitted with a base plate for separate application. The built-in relief valve should be adjusted to prevent unintentional high pressure being applied to the system. A built-in manual valve for releasing pressure from the system is available as an option.
- Purpose In the case of the operation of the safeties in a 1:2 hydraulic lift system where the weight of the car is no longer carried by the ropes, the electrical supply to the elevator should automatically be switched off. As the ram comes to a stop, usually after about 60 cm, a limited slack rope condition will accur. The KS Slack Rope Valve avoids the ram being lowered by the opening of the manual lowering valve which would otherwise cause additional slack rope. The KS Slack Rope Valve prevents the pressure holding up the ram from being evacuated through the manual lowering valve.
- Function The KS valve is adjusted to a pressure just above the pressure produced by the weight of the ram. When under normal operating conditions, the weight of the car acts upon the ram through the 1:2 roping, the resulting pressure is sufficient to open the poppet of the KS valve when the manual lowering H is opened, allowing the car to descend as required. When however the `safeties´ have operated and only the weight of the ram and sheave block are acting upon the hydraulic system, the resulting pressure is too low to open the KS valve. The ram and heave block can not be lowered.
- Adjustment The KS is adjusted with a 3 mm Socket Key by turning the screw K `in´ for higher pressure and `out´ for lower pressure. With K turned all the way `in´, then half a turn back out, the unloaded car should descend when the D solenoid alone is energised. Should the car not descend, K must be backed off until the car just begins to descend, then backed off a further half turn to ensure that with cold oil, the car can be lowered as required.
