User Manual - L10 Pressure Lock Valve (UCM/A3 Valve)Certified by TUV SUD Germany Warning: Only qualified personnel should adjust or service valves. Unauthorised manipulation may result in injury, loss of life or damage to equipment. Prior to servicing internal parts, ensure that the electrical power is switched off, ball valve is closed and residual pressure in the valve is reduced to zero. Very high pressure spikes could result in deformation and oil splashing, this could cause serious injuries. L10 Description: The L10 Pressure Lock Valve is a solenoid operated check valve designed for hydraulic elevators and includes a self closing manual lowering valve. Its purpose is to allow free flow of oil from the pump unit to the cylinder for upward travel and to prevent flow in the reverse direction from the cylinder to pump until an electrical signal is given to the solenoid. The L10 can be mounted in any positon without causing any operational problems. Installed in the main cylinder line directly adjacent to the main elevator control valve, the L10 can be employed as a safety back up valve to the down system of the main control valve to prevent unwanted down movement of the elevator should an electrical or mechanical malfunction occur in the main control valve (UCM case). Another application of the L10 is to reduce the amount of bounce in a hydraulic elevator system due to the compressibility factor of oil between the cylinder and the control valve, by mounting the L10 directly onto the cylinder connection. A Slack Rope Valve LK for roped elevators (e.g. 2:1 indirect transmission) is optional. It prevents the slack rope condition caused by the lowering of the ram when the car is suspended in the safeties or resting on the buffers. Technical Data: Flow Range max.: l/min Operating Pressure min./max.: bar Burst Pressure: bar Tank Connection for LH TN Weight: kg PB Cylinder pressure port: G Attention: For manual lowering connect port TN with tank. T^-Z Free Flow. Solenoid LE not energized. Z^T Flow only when Solenoid LE energized. Germany [email protected] Designer and Manufacturer of the highest quality control valves & safety components for hydraulic elevators

Pressure Lock Valve (UCM/A3 Valve) L10 Rest Position: When L10 is at stand-by, the solenoid LE de-energized and the main flow guide LV closed, preventing flow from cylinder to tank. Up Travel: During up travel with the pump running, oil flows through port T, through the flow guide LV and out through port Z to the main cylinder. Solenoid LE is not energized. Down Travel: For the car to have a down travel, the L10 should be energized approximately 0.5s earlier than the main control valve (e.g. EV100). This enables the oil to escape from the pilot chamber and allows the main piston LV to open. Else,...