Brochure

TK-9xxx Series
152
© Copyright 2006 TAC. All Rights Reserved. F-27383-1
Relay Bulb Thermostats
Model Chart
Specifications
For proportional temperature control of pneumatic
valves and actuators to maintain air temperatures
in duct, plenum chambers, etc.
Features:
• Direct Acting with 18-1/4 in. (.46 m) rigid rod and tube
sensing element, or with 8 ft. (2.44 m) averaging element.
• Direct or Reverse Acting with 8 ft. averaging element.
• Non-bleed, force-balance design uses air only when
moving actuator.
• Field-adjustable throttling range.
Model No.
Action
a
a
Direct Acting (D.A.)  Increase output pressure on temperature rise.
Reverse Acting (R.A.)  Decrease output pressure on temperature rise.
Dial Range qF (qC)
b
b
Dual marked.
Throttling Range
(Adjustable)
Element
Maximum Temp. qF (qC) Dimensions
TK-9637 D.A.
30 to 180 (-1 to 82)
5 to 40qF/10 psi
(3 to 22qC/69 kPa)
225 (107)
7/16 in. (11 mm) diameter
18-1/4 in. (46 m) long
TK-9737 R.A. 250 (121)
TK-9838 D.A. 35 to 145 (1 to 63)
3 to 30qF/10 psi
(2 to 17qC/69 kPa)
210 (99)
3/32 in. (2.4 m) diameter
8 ft. (2.4 m) long
Sensing Element
TK-9637 and TK-9737 Rod and tube (bimetal).
TK-9838 Liquid filled averaging bulb.
Thermostat Proportional relay type for mounting in ducts.
Control dial range Refer to Model Chart.
Throttling range Refer to Model Chart.
Output air signal 0.5 psig (3.4 kPa) to supply air pressure -0.5 psig (-3.4 kPa).
Action Refer to Model Chart.
Ambient limits
Shipping -40 to 180qF (-40 to 82qC). 0 to 98% R.H., non-condensing.
Case operating 40 to 180qF (4 to 82qC). 10 to 98% R.H., non-condensing.
Element Refer to Model Chart.
TK
-
9
xxx
Series
TK-9637
TK-9737
TK-9838