Thermostatic valves 20 mm - 2 way Valve size

Shop our collection of 250+ thermostatic valves (CCVs and radiator valve operators), thermostats, and accessories from Johnson Controls, Danfoss, Siemens, and other leading brands!

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Erie VS2343 VB: 3/4 in, 2W, Zone, FLR, BR, 3.5 cv, Erie PopTop, Steam | Blackhawk Supply

VS2343 | VB: 3 / 4 in, 2W, Zone, FLR, BR, 3.5 cv, Erie PopTop, Steam | Erie by Schneider Electric

Brand: Erie

SKU: VS2343

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Square D BMXDRA1605 Discrete output module X80, 16 outputs, relay, 24 V DC or 24...240 V AC | Blackhawk Supply

BMXDRA1605 | Discrete output module X80, 16 outputs, relay, 24 V DC or 24...240 V AC | Square D

Brand: Square D

SKU: BMXDRA1605

Siemens 587-187 Room Temperature Sensor, Full HMI, For Use With Siemens Talon Controllers | Blackhawk Supply

587-187 | Room Temperature Sensor, Full HMI, For Use With Siemens Talon Controllers | Siemens

Brand: Siemens

SKU: 587-187

Johnson Controls P599VCPS105K 0 TO 500 PSIS PRESS; P599 PRESSURE TRANSDUCER WITH WIRE HARNESS KIT | Blackhawk Supply

P599VCPS105K | 0 TO 500 PSIS PRESS; P599 PRESSURE TRANSDUCER WITH WIRE HARNESS KIT | Johnson Controls

Brand: Johnson Controls

SKU: P599VCPS105K

iO HVAC Controls RM-2020 Rheem 20 x 20 Rectangular Zone Damper, 35 second Belimo actuator | Blackhawk Supply

RM-2020 | Rheem 20 x 20 Rectangular Zone Damper, 35 second Belimo actuator | iO HVAC Controls

Brand: iO HVAC Controls

SKU: RM-2020

Belimo B214+LRQB24-MFT CCV | 0.5" | 2 Way | 7.4 Cv | w/ Non-Spg | 24V | MFT | Blackhawk Supply

B214+LRQB24-MFT | CCV | 0.5" | 2 Way | 7.4 Cv | w/ Non-Spg | 24V | MFT | Belimo (OBSOLETE)

Brand: Belimo

SKU: B214+LRQB24-MFT