This product has the following features:
钳头采用了先进的卡紧机构，在上卸直径为 2 7/8"，3 1/2" 两种油管螺纹时，主、背钳不需要更换任何零部件，卡紧性能可靠、使用寿命长。
The tong head uses inner curved roller climbing and clipping mechanism and needn’t to change any part during making up or breaking out the tubing thread which diameter is 2 7/8″ or 31/2″.
Two shifts provides high speed at the high gear and large torque at the low gear.
Brake belt assembly, easy to operate and convenient to maintain and replace.
Adapt latch type reversing device, which has simple structure and convenient to change.
Users can choose fin-tooth dies ,reduce the damage of pipe.
Users can equip gating safety device according to needs, which can provide safety protection. It can make the system auto-release pressure when the door open, then the power tong will stop running.
Users can equip anti-clamp flat device according to needs, which can prevent the tube clamped flat when exceed torque used the pipe corroded.
Users can equip hand control reversing relief valve according to needs, which can obtain the best make up torque of the various oil pipe by
adjusting oil supply pressure.
This product has owned several patent of China