The built-in safety valve of LG2400 is a special function to protect the oil circuit of the motor and equipment. The built-in safety valve is one of the patents. When the pressure in the circuit is too high, the butter will flow back to the oil storage barrel of the grease gun. inside and will not spray outside to avoid spraying on the operator or equipment.
LG2400 electric grease gun with built-in safety valve
LG2400 Makita export model with built-in safety valve