Elevator Power Units

Elevator Power Units

Due to its closed loop operation, the Schumacher hydraulic power unit (with Bucher Hydraulics valve) supplies consistent operation regardless of load and temperature.

A stepless, linear travel profile is accomplished by utilizing a proportional solenoid. The solenoid voltage is adjusted with the aid of a flow sensor to guarantee a consistent ride with minimal leveling. Consequently, motor run times are reduced by as much as 30%, saving power and creating an environmentally friendly product. Bucher valves also reduce the need for heating and cooling systems, which are required by most other hydraulic systems. Schumacher power units utilizing a Bucher Hydraulics electronic valve offer optimum assurance that elevators are capable of handling high-traffic applications.

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Advantages

  • Ride not affected by changes in load or temperature
  • Reduces motor run time
  • Eliminates overheating issues
  • Up to 30% energy savings
  • No seasonal adjustments
  • Wide range of application from residential to passenger to freight elevators

Dry power unit

Standard Features

  • Power units tested and pre–programmed prior to shipment
  • Constant speed in up and down directions (standard)
  • Inspection speed adjustable from 20%–80% of contract speed
  • Combination power unit/controller packages available
  • Easily interfaced with all brands of controllers

Optional Features

  • Electronic emergency lowering device
  • Hand pump
  • Pressure switch
  • Shut– off valve

Bucher Hydraulics Valve

Schumacher Elevator Company is the North American Distributer of Bucher Hydraulics Elevator Products.

The Bucher Hydraulics electronic valve offers optimum assurance that elevators are capable of handling high-traffic applications.


Specifications

LRV-1 Higher Pressure

Valve Size Flow Range Viscosity Range Max Oil Temp (°F) Max Operating Pressure Static Pressure Range Connections
Z, T, P
Test Connections
Z1, Z2, Z3
Weight (lb) L x W x H (in)
175-1 4-66 20-500 158 870 150*-653 1"NPT G 1/4 17.6 7.72 x 8.19 x 12.8
350-1 40-130 20-500 158 870 150*-653 1.5"NPT G 1/4 24.3 8.5 x 19 x 14
700-1 105-260 20-500 158 870 180*-653 2"NPT
2.5"NPT
2"NPT
G 1/4
G 1/4
G 3/8
49.6 11.7 x 8.86 x 16.9

LRV-1 Lower Pressure

Valve Size Flow Range Viscosity Range Max Oil Temp (°F) Max Operating Pressure Static Pressure Range Connections
Z, T, P
Test Connections
Z1, Z2, Z3
Weight (lb) L x W x H (in)
350-1 PM 40-130 20-300 158 580 70*-419 1.5"NPT G 1/4 24.3 8.5 x 8.19 x 14
700-1 105-260 20-300 158 580 80*-419 2"NPT
2.5"NPT
2"NPT
G 1/4
G 1/4
G 3/8
49.6 11.7 x 8.86 x 16.9

* Depending on flow and viscosity.