Owner's manual

Series 38R ••• Self-Acting Temperature Control Valves
Operation, Installation & Maintenance Manual
REVERSING THE VALVE ACTION
Page 14
Direct-Acting valves close with temperature increase and inward stem motion.
On a regulator these valves are used for HEATING.
Reverse-Acting valves close with temperature decrease and outward stem motion.
On a regulator these valves are used for COOLING.
1/2” through 2” Bronze Body valves use the same parts for both versions, and as such
can be changed from one form to the other in most any shop.
1/2” – 2” Valve Sizes Only
Figure 7 Figure 8
Figure 9
Stem moves in to body
to close assembly.