Outdoor freight elevator, Guard rail hydraulic cargo lift

Advantages on Foundation:

Engine room can be set within 15m around the lift, only occupies 3-4 m2. 
Hydraulic lift has no counterpoise device which make more space for the lift.. 
The loading of the lift is afforded by the foundation, if the cargo is not heavy enough, brick or brick & concrete is OK.

Advantage on safety and stability:

Besides the safe devices on normal elevator, there are still:
Overfall valve: To avoid over loading when it is moving up.
Emergency manual valve: In case power off, the lift car may drop to the nearest layer to open the door.
Manual pump: When failure occurs, operator may use manual pump to give high pressure oil to get to the nearest layer. 
Pipe broken protection valve: When lifting car drops fast as oil pipe broken, use the valve can make the lift stop dropping. 
Oil temperature protection: When temperature of oil is overheat, there is signal given out, stop the lift when temperature get normal, start again.

Operation cost advantages:
Low failure rate: Because of the advanced hydraulic system and perfect control method, the failure rate has been to minimum. 
Low power cost: When lift drops, self-weight makes big driving force so that save a lot of energy.

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