Two-way on-off low voltage valves consist of an actuator and valve assembly for controlling the flow of hot water.
Manual opener (on all models, except straight-through, normally open valves) for valve operation on power failure; valve returns to automatic position when power is restored.
All models may be installed without disassembling the valve.
Compact construction for easy installation.
Complete powerhead may be removed or replaced without breaking plumbing line connections or draining the system.
Actuator motor may be replaced without removing the valve body or draining the system.
4 in. high x 3 11/16 in. wide x 2 3/8 in. deep
102 mm high x 94 mm wide x 60 mm deep
Use this valve in closed loop hydronic systems that do not contain dissolved oxygen in system water, such as fresh water from frequent source of makeup water. Valve designed for cycling (not constantly powered on) applications.
50 Hz; 60 Hz
Approvals, Underwriters Laboratories Inc.
UL Listed: File MH11826
Operating Humidity Range (% RH)
5 to 95% relative humidity, non-condensing.
24 Vac; Power Consumption--7.7 VA
Nominal Open--15 sec
Ambient Temperature Range (F)
125 F Maximum
Ambient Temperature Range (C)
52 C Maximum
Pipe Size (inch)
Pipe Size (DN)
Fluid Temperature (C)
10 C to 93 C
Fluid Temperature (F)
50 F to 200 F
Maximum Differential Pressure Ratings (Close-off) (psi)
Maximum Differential Pressure Ratings (Close-off) (kPa)
Electrical Connections (in.)
18 in. leads
Electrical Connections (mm)
457 mm leads
Spring return to close
End Switch Rating
50 VA pilot duty @ 24 V; 4.4 A running with 26.4 A inrush @ 120 V