The Wayne 64488 is factory-configured for natural gas

2 PSI Low and High Stage Switch Differential

valve bodies

the Emerson 021067 is the identical part number for the X-9144-B13B cage assembly used in the THR series

Siemens Building Technology 243-0001 Switching Relay 320735-701 The Wayne 64488 is factory-configuredThe Siemens Building Technology 243 0001 Switching Relay is a rugged, pilot operated pneumatic relay designed for reliable two position switching within complex HVAC pneumatic control systems. Engineered for 3 way air valve functionality, this auxiliary device allows for the efficient diverting of a common part between two independent pneumatic circuits. As a veteran technician knows, the adjustable changeover pressurefactory calibrated at 9 psi but