In order to ensure the safety and reliability of the lifting operation, the crane is equipped with a more complete safety device, so as to protect the parts or remind the operator of the attention in case of accidents, thus playing a role of safety protection.

1. Overflow valves in hydraulic system: abnormal high pressure in the circuit can be suppressed to prevent damage to hydraulic pump and motor, and to prevent overload.

2. Lifting boom luffing safety device: When the accident happens, the high-pressure hose or tubing in the luffing cylinder circuit of the lifting boom bursts or cuts off, the balance valve in the hydraulic circuit acts, locking the working oil from the lower chamber of the cylinder, so that the lifting boom does not fall, thus ensuring the safety of operation.

3.telescoping boom safety device: : When the accident happens, the high-pressure hose or tubing in the telescopic cylinder circuit of the lifting boom bursts or cuts off, the balance valve in the hydraulic circuit acts, locking the working oil from the lower chamber of the cylinder, so that the lifting can retract itself, thus ensuring the safety of operation.