Advantages of the GMV solutions:

  • Requires minimal space inside the machine room without compromising safety and convenience during maintenance works and hand operation in case of emergency.
  • Cost avoidance for masonry works of the machine room.
  • Drastically reduced installation times and wiring of the machine room
  • The elimination of the machine room means saving space for a different use


The GMV heat exchangers are used on hydraulic systems when operational conditions or high traffic lead to an overheating of the fluid.

The small sizes allow the installation inside the machine room provided with an appropriate thermal outside exchange.

Through the heat balance calculations during the designing process of the elevator, it is possible to specify a maximal number of travels/p. hour, beyond which an oil cooling system as well as appropriate heat exchangers should be applied.


The electronic motor protector device SM 110 is designed to protect the motor stator windings from overheating damages.

The protector operates by direct temperature control of the engine through adequate thermistors inside the windings.


The “Pawl Device” is one of the safety devices required from the European standards for hydraulic elevators. The “Pawl Device” has two main functions:

to prevent the movement of the car in case of fluid leakage or changes of the fluid volume.
to stop the car and keep it stationary in case the piston supply piping should break.
The “Pawl Device” is equipped with a hydraulic buffer and guarantees a deceleration value lower than “gn” (9,81 m/s2), as an alternative to the traditional buffers on the pit ground.


Flexible synthetic rubber hoses, internally reinforced with a high resistant, simple or double layered spiral metal grid, with an external layer of synthetic rubber.

Available length: from 1,5 m to 25 m, with extensions of 0,5 m.

Fittings: steel 9S Mn Pb 28.

Technical Data

Operating temperature: from -40°C to +100°C

Dimensions of the pipes: 3/4’’ (90°, DN 19), 1’’ (DN 25), 1’’ (DN 32), 1’’ (DN 40), 2’’ (DN 50).

Flex hoses of 2” (DN 50) supplied with 2 fittings of 2”.

The minimum radius of curvature: from 160 to 630 mm.

Minimum explosion pressure: from 360 to 400 bar.

Maximum working pressure in compliance with the standard EN 81.20 § from 45 to 50 bar.


Complete connection pipes are supplied according to the placement of the pistons.

Rigid pipes with connections and L-line locking ring.

Produced in pieces of 5 m.

Technical Data

Rigid piping between the power unit and the parachute valve

Pipe diameter: 35 x 2,5 (35 Line), 42 x 3 (42 L Line)

Connection piping between the parachute valve type G and the piston

Pipe diameter: 30 x 3 (30 S Line), 38 x 4 (38 S Line) e 60 x 5 (60 S Line)

Maximum working pressure for single-stage pistons and telescopic pistons with mechanical synchronization

L-Line: from 68 to 71 bar; S-Line: from 80 to 95 bar

Maximum operating pressure for telescopic pistons with 3-stage hydraulic synchronization

L-Line: from 52 to 54 bar; S Line: from 61 to 73 bar.