breakdown

cause

How to check

leackage    

Incorrect installation

①check if  centers of pipelines in both ends  are in alignment

②Tighten the connecting bolts and make the tightening force of the bolts evenly fit.

incomplete shutting

①check if the butterfly valve is opened  and closed  completely

②According to the actuator manual adjustment, the instructions and the actual open state synchronization.

③Check if the pipe has stuck material.

3、valve parts damage

①seat damage

②disc damage

③upper sealing damage

a、 replace seat

b、 replace disc

c、 replace sealing gasket

4、taper pin loosing

make it tightening by hammer

Driving device failed to work

1、 connection pin fall off

2、 taper pin cut short

3、 driving unit broke

a、replace key

b、replace pin

c、reference to actuator manual