This National Board certified valve is a direct replacement for Apollo 19 series configurations requiring precise blowdown control and repeatable performance

the wiring diagram is printed directly on the relay body to assist with field identification of the normally open (NO) and normally closed (NC) contacts

For technicians performing scheduled maintenance or emergency retrofits

Always verify the model number on your valve’s nameplate before installation

Siemens Building Technology 656-0012 Valve Assembly R-407C This National Board certified valveThe Siemens Building Technology 656 0012 is a precision engineered normally closed pneumatic valve assembly designed for high performance fluid control in terminal unit applications. Part of the Powermite series, this 2 way globe valve features a 1 2 inch line size and a 2. 1 Cv flow coefficient, making it ideal for managing hot water, chilled water, or steam in fan coil units, convectors, and reheat coils. The 10 15 psi pneumatic actuator range