Honeywell V8043F1036 Zone Valve – 3/4" Sweat, Two-Way On/Off Control with End Switch
The Honeywell V8043F1036 is a low-voltage, motorized zone valve designed for hydronic heating systems requiring on/off flow control. This model features a 3/4" sweat connection and includes an integral end switch, allowing for coordination with other system components such as circulators or burners.
Product Overview
Function: Two-way, straight-through valve; opens on power and spring-returns closed when de-energized
End Switch: Provides auxiliary control signal when valve reaches full open position
Manual Lever: Integrated lever for system fill or manual operation during power loss
Application: Designed for closed-loop hydronic systems in zoning applications
Key Features
Connection Type: 3/4" sweat fittings for copper tubing
Flow Coefficient (Cv): Rated at 3.5 Cv
Electrical Interface: Screw terminal block for secure 24V AC connections
Replaceable Powerhead: Field-replaceable actuator without draining the system
Actuation Time: Approximately 15 seconds powered; spring-return on power loss
Technical Specifications
Voltage: 24V AC, 50/60 Hz
Max Fluid Temp: 200°F (93°C)
Max Close-Off Pressure: 20 PSI
Body Pattern: Straight-through
End Switch Rating: 50 VA pilot duty @ 24V AC
Installation and Application Notes
This valve is intended for installation in the return piping of a closed hydronic loop. It should be mounted with the actuator in a horizontal position to prevent motor damage from condensation. Electrical connections should be made in accordance with NEC and local code requirements. The V8043F1036 is suitable for integration with thermostat-controlled zoning systems using a 24V transformer and compatible relay or zone panel.
Contractor Considerations
Pre-stripped screw terminals simplify field wiring
End switch facilitates burner or pump interlock
Manual opener enables system servicing without energizing the valve
Common choice for retrofit and new installations in zoned hot water systems