Brochure

TK-2xxx Series, TK-3xxx Series, TK-4xxx Series, TK-4212-201
148
© Copyright 2006 TAC. All Rights Reserved. F-27383-1
Unitary Bulb Thermostats
Model Chart
For proportional temperature control of pneumatic
valves and actuators to maintain discharge
temperature of reheat systems and sampling
chamber or return air temperature of terminal units
and as a proportional low limit thermostat.
Features:
• Proportional, two-pipe nozzle and flapper design.
• One-pipe model available for use as low-limit controller.
• Adjustable throttling range.
• Straight, coiled or averaging liquid-filled sensing elements.
• Rugged design.
• Direct Acting or DA/RA models available.
Model No.
Description
and Action
a
psi (kPa)
a
Direct Acting (D.A.)  Increase output pressure on temperature rise.
Reverse Acting (R.A.)  Decrease output pressure on temperature rise.
Max. Safe
Bulb Temp.
qF (qC)
Bulb Style
Dimensions
in. (mm)
Control
Dial Range
qF (qC)
Throttling
Range
Supply Air
Pressure
psig (kPa)
TK-2001
Heating
D.A.
b
b
Field changeable to reverse acting.
140 (60)
Straight
1/4 x 11-1/2 (6.35 x 287)
Dial
Marked
“Cooler-
Warmer”
60 to 90
(15 to 32)
Adjustable
2 to 10qF (1 to 6qC)/
10 psi (69 kPa)
Factory Set
4qF (2qC)/
10 psi (69 kPa)
15 (103)
Minimum
20 (138)
Nominal
TK-3001
Coiled
1 x 5 (25 x 127)
TK-4001
Averaging
1/8 x 48 (3 x 1.2 m)
TK-2201
Heating-Cooling
20 (138) D.A.
15 (103) R.A.
Straight
7/32 x 14 (6 x 356)
15 (103) R.A.
a
Cooling
20 (138) D.A.
a
Heating
TK-3201
Coiled
1 x 5 (25 x 127)
TK-2012
Heating
D.A.
b
230 (110)
Straight
3/16 x 11-1/4 (5 x 286)
Dial
Marked
“Cooler-
Warmer”
30 to 90
(-1 to 32)
Adjustable
5 to 25qF (3 to 14qC)/
10 psi (69 kPa)
Factory Set
10qF (6qC)/
10 psi (69 kPa)
15 (103)
Minimum
20 (138)
Nominal
TK-4012
Averaging
3/32 x 54 (2 x 1.4 m)
TK-4212
Heating-Cooling
20 (138) D.A.
15 (103) R.A.
Averaging
3/32 x 54 (2 x 1.4 m)
15 (103) R.A.
a
Cooling
20 (138) D.A.
a
Heating
TK-4212-201
Heating-Cooling
Low Limit
c
20 (138) D.A.
Full Output
15 (103)
c
At 20 psi (138 kPa) unit can bleed down a branch line from a controlling thermostat.
At 15 psi (103 kPa) unit is inoperative, i.e., passes controlling thermostat signal.
Averaging
3/32 x 54 (2 x 1.4 m)
15 (103)
Full Output
20 (138) D.A.
a
Heating
TK
-
2
xxx
Series, T
K
3xxx Seri
e
TK-4xxx
Series, T
K
4212-201