Where is the pilot connection located on this valve

Does this relay protect against voltage surges

Ease of Maintenance: Integrated 1/8" NPT upstream and downstream taps allow for quick pressure checks and routine system testing

Utilizing a C3 internal clearance

and ventilation regulation into a single 5-button interface

Siemens Building Technology 656-0017 Valve 321894-706 Where is the pilot connectionThe Siemens Building Technology 656 0017 is a heavy duty 1 2 inch pneumatic radiator valve engineered for proportional control in two pipe steam or hot water systems. This normally open (N. O.) assembly features an angle union valve body constructed from durable brass, designed specifically for terminal unit applications like convectors, fan coil units, and baseboard radiation. With a 2. 1 Cv capacity and a standard 3 8 psi spring range, this valve