Function principle：

The balancing valve, could automaticly control the connected angle seat valve's open and close, to keep a certain working pressure of the equipment.

First, set a certain air pressure for the S1 port, then the air pressure of S2 port will change from time to time;

when (S1-S2)＞0.1bar, the port A will open, the angle seat valve will be opened;   

when (S2-S1)＞0.1bar, the port A will close, the angle seat valve will be closed by spring force;    

Advantages:

Automaticly adjusting and working, no other people or device needed 

High sensitivity: the pressure change to +/-0.1bar, balancing valve will auto switch

Techincal data:

Port Size:

P,A: G1/4",  S1, S2: G1/8"

Pressure range:

S1 port: certain pressure, 0.2-4bar, you can set it on your request

S2 port: sampling pressure from equipment pipelines, will be in range S1+/-0.1bar

P,A port: according to the control pressure of the connected angle seat valve, normally 2-8bar

Temperature range: 0-100°C