User Guide

Dimensions
*Models with check valve tail-piece (C) end-to-end dimension is B'.
**with integral outlet temperature gauge.
Operating principle
B
B’
Code* A B B'* C D
Wt
lb (kg) / C-lb (kg)
116440A(C) ½" NPT F 2
13
/16" 4
13
/16" ¾" 3" 1.6 (1.8) / 0.72 (0.82)
116441A(C)** ½" NPT F 2
13
/16" 4
13
/16" ¾" 3" 1.5 (1.7) / 0.68 (0.77)
116450A(C) ¾" NPT F 2
13
/16" 5" ¾" 3" 1.6 (1.8) / 0.72 (0.82)
116451A(C)** ¾" NPT F 2
13
/16"
5" ¾" 3" 1.5 (1.7) / 0.68 (0.77)
At the set temperature, the valve plug (1), controlled by the
thermostatic balancing cartridge (2), gradually closes the outlet
to the minimum flow (3). The outlet never fully closes to always
allow a minimum flow for temperature sensing and to prevent
recirculation pump dead-heading. If the temperature decreases,
the outlet increases, causing flow and thus temperature to
increase back to the set temperature as shown in curve 1. If
temperature exceeds the set-point, the plug stays in the minimum
closed position as shown in curve 2.
Cv
max
T (°F)
G (gpm)
Cv
min
80 120 130 140 180 150 160 170
T
set
(2.1)
(0.35)
Cv
design
(0.69)
1
2
3
1
2
3
1
2
3
1
2
3
Thermostatic control,
1164xxA series
Thermostatic control with check valve,
11614xAC series