V4055A 1007 Honeywell Fluid Power Gas Valve V4055A1007 110/120V 50/60HZ Brand New
Product Overview
Part Number: V4055A1007
Manufacturer: Honeywell
Product Category: Gas Valve Actuator — Fluid Power Type, On-Off Control
Series: V4055
Overview
The Honeywell V4055A1007 is an on-off fluid power actuator for low-pressure gas valve assemblies used in commercial and industrial combustion systems. It pairs directly with Honeywell's V5055 and V5097A,B gas valve bodies to form a complete gas shutoff assembly that controls fuel supply to burners in boilers, commercial heating equipment, and industrial combustion processes.
The fluid power mechanism distinguishes the V4055 from simpler solenoid-operated gas valves. Rather than using electromagnetic force to directly open the valve disc, the actuator uses a small internal electric motor to build hydraulic pressure in an enclosed fluid circuit. This hydraulic pressure then pushes the valve open, resulting in a controlled, gradual opening motion rather than instantaneous snap-open behavior.
This gradual opening — 26 seconds at 60 Hz — reduces combustion pressure spikes at burner light-off, improving ignition reliability, reducing mechanical stress on the combustion system, and producing smoother startup on large burners where sudden gas pressure surges would cause unstable ignition.
Key Specifications
| Voltage | 120 VAC |
| Frequency | 60 Hz |
| Opening Time | 26 seconds (60 Hz) |
| Closing Time | 1 second maximum |
| Max Operating Pressure | 5 psi (34 kPa) |
| Ambient Temperature | −40°F to +150°F (−40°C to +66°C) |
| Enclosure Rating | NEMA 1 (IP30) |
| Compatible Valve Bodies | V5055A/B/C/D/E, V5097A/B/C/D/E |
| Valve Position Indicator | Red (open), Yellow (closed) |
| Mounting | Direct to valve bonnet — three setscrews |
| Certification | UL Listed (File No. MH1639) |
| Control Type | On-Off |
How the Fluid Power Mechanism Works
Inside the V4055A1007, the opening sequence begins the moment the control circuit energizes the actuator's motor:
- The motor runs a small hydraulic pump that builds pressure in the actuator's internal fluid circuit
- Rising hydraulic pressure acts on the valve stem mechanism inside the connected V5055 or V5097 valve body, progressively lifting the valve disc off its seat
- The opening motion is time-controlled by the pump output rate — 26 seconds to reach full open at 60 Hz operation
- When the control circuit de-energizes (burner shutdown, safety interlock, or normal setpoint-off), the hydraulic pressure is instantly released through an internal bypass, and a return spring drives the valve closed within 1 second
This combination — slow open, fast close — is a deliberate safety feature. The slow opening prevents combustion shock and abrupt gas pressure surges, while the fast closing ensures immediate fuel supply cutoff when a shutdown command is received, meeting major burner safety standards and insurer requirements.
Position Indication and Installation
The V4055A1007 continuously displays valve position during operation. A red indicator lamp shows when the valve is open, and a yellow indicator lamp shows when it is closed. This provides clear, unambiguous status indication at a glance.
Installation is straightforward — the actuator mounts directly to the valve bonnet of compatible V5055 or V5097 valve bodies using three setscrews, requiring no separate mounting bracket. The actuator and valve body can be oriented in any position (vertical, horizontal, or inverted) without affecting operation or sealing, providing installation flexibility in tight equipment rooms and retrofit applications.
When replacing a V4034 actuator with the V4055A1007, the associated gas valve must also be replaced, as the V4055 is not compatible with older V5034 valve bodies.
Applications
The V4055A1007 sees wide use in:
- Commercial boilers — Large commercial and light-industrial boilers with multiple burner stages use fluid-power actuated gas valves to ensure smooth multi-stage ignition and safe single-step shutdown on safety interlock
- Industrial process burners — Combustion heating systems on industrial dryers, ovens, kilns, and process heaters require controlled gas delivery — the 26-second opening profile prevents pressure transients that cause pilot-loss or main burner lockout on large gas trains
- Replacement service — The V4055 family is a long-established product line, making this actuator ideal for returning older gas train systems to as-designed operation
Frequently Asked Questions
Q1: The burner is failing to light off reliably. Could the V4055A1007 opening time be wrong for the application?
A 26-second opening time is the standard specification for the V4055A1007. If light-off is unreliable, the cause is usually pilot ignition timing or gas pressure rather than the actuator's opening rate. Verify the pilot flame is established before the main gas valve opens, and confirm gas supply pressure at the valve inlet is within the burner manufacturer's specified range. If different opening timing is needed, alternative V4055 models are available.
Q2: The valve does not close fully — a small amount of gas continues to flow after shutdown. Is the actuator faulty?
Full valve closure is a function of the V5055 or V5097 valve body, not just the actuator. If the actuator's closing time (spring-driven, maximum 1 second) is confirmed correct by observing the position indicator switching to yellow on de-energization, the incomplete closure is in the valve body. Check for debris on the valve seat, seat wear, or damaged valve disc. The actuator and valve body are separate line-replaceable units.
Q3: Can the V4055A1007 be used with 50 Hz power supply?
The V4055A1007 is a 60 Hz model. At 50 Hz, the motor runs slower, changing the opening time to approximately 32 seconds rather than 26 seconds. This may or may not be acceptable for specific burner applications. For 50 Hz installations, Honeywell offers 50 Hz and 50/60 Hz compatible V4055 models with correct timing specifications.
Q4: How is the V4055A1007 wired into the burner control circuit?
The V4055A1007 operates on 120VAC and is controlled by a simple on-off contact in the burner control circuit. When the burner control (controller output, aquastat, or thermostat contact) closes, 120VAC is applied to the actuator motor, beginning the opening sequence. When the contact opens, the motor de-energizes and the spring closes the valve. The actuator draws approximately 1.5A during opening and essentially no current once fully open. Wire the actuator in series with appropriate safety interlock circuits.
Q5: What maintenance does the V4055A1007 require?
The V4055A1007 has no user-serviceable internal components. Routine maintenance includes verifying position indicator operation (red on energization, yellow on de-energization), checking mounting setscrews for tightness annually, confirming valve body moves freely without binding, and verifying opening and closing cycle times during annual combustion system inspection. The internal fluid is factory-sealed and requires no service — the actuator is replaced as a complete unit when needed.
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