Description
The VP-2170 series pneumatic control valves have been designed for the control of hot water, chilled water, glycol and low pressure steam. Direct acting, they are nowmally open, closing on rise in control pressure. (Also available in reverse-acting models consult factory.)

The VP-3170 series pneumatic mixing valves have been designed for the control of hot water, chilled water and glycol. They are normally closed on their side ports 'A', opening on rise in control air pressure and normally open on their bottom ports 'B', closing on rise in control air pressure. The third port, 'AB', on the side of the body opposite port 'A' is the common outlet.