Siemens Building Technology 356-1005 Thermostat 318820-201 The motor features a 1/4"

The motor features a 1/4" x 1-5/16" shaft

Also identified by the manufacturer part number 27K3301

offering a compact design that fits easily into tight mechanical rooms or crowded manifolds

To achieve reverse action with this 3-way air valve

Siemens Building Technology 356-1005 Thermostat 318820-201 The motor features a 1/4"The Siemens Building Technology 356 1005 is a professional grade pneumatic thermostat from the TH 356 Limitem series, specifically engineered for high precision temperature control in air handling units and unit ventilators. As a reverse acting thermostat (RA), this unit is designed to increase output air pressure as the sensed temperature decreases, making it a critical component for low limit freeze protection or mixed air control. The 30 180F