According to the assembly wrenching requirements of middle-sized double eccentric semi-ball valve

the vertical assembly machine is designed to assemble semi-ball valve.In the assembly process

by changing the two transmission chains

with small torque

it can fast proceed at the early assembly.At the middle of assembly

it proceeds at low speed with large torque.The impact tighten step is accomplished at the ending stage

through releasing the energy of flywheel.By the aid of the industrial control computer

the automation of the entire process of assembly is realized.The difficulties in controlling of preload and the technical problems of the inconsistent quality are solved by the valve seat assembly machine

the manufacturing level of semi-ball valve and its production efficiency is greatly improved.