User Guide

F-27013-4 © Copyright 2006 TAC All Rights Reserved. 11
THEORY OF OPERATION
The PopTop Series floating or proportional modulation valves are modulating valve actuator
assemblies. The modulating valves are designed to control the flow in the circuit by making
incremental adjustments to the flow path with-in the valve.
The Spring Return PopTop Series modulating valves, when powered, the actuator moves to
the desired position, at the same time tensing the spring return system. When power is
removed for more than two minutes the spring returns the actuator to the normal position.
MAINTENANCE
The Modulating PopTop Series valves require no maintenance. Replace defective modules
Regular maintenance of the total system is recomended to assure sustained, optimum
performance.
FIELD REPAIR
Replace any damaged or failed components with complete bodies or actuator replacements.
DIMENSIONAL DATA
Table-2 Dimensions - inches (mm).
Valve Body Size A B C
1/2" Sweat 1-5/16 (33) 15/16 (23) 1-5/16 (33)
3/4" Sweat 1-3/8 (35) 15/16 (23) 1-11/16 (43)
1" Sweat 1-11/16 (43) 15/16 (23) 1-11/16 (43)
1-1/4" Sweat 1-7/8 (47) 1 (25) 1-13/16 (46)
1/2" NPT, Rp 1-3/8 (35) 15/16 (23) 1-5/16 (33)
3/4" NPT, Rp 1-11/16 (43) 15/16 (23) 1-7/16 (37)
1" NPT, Rp 1-7/8 (47) 1 (25) 1-11/16 (43)
1/2" SAE Flare See Figure-12
1-3/16
(31)
1-9/16
(39)
1-5/8
(41)
3-3/16
(81)
2-1/4
(57)
3/16
(4)
1/8
(2)
3-13/16
(98)
4-1/4
(107)
2
(51)
B
2-Way
C
3-Way
A
A
Figure-10 Modulating Non-Spring Return Valve.
3-3/16
(81)