L4079 Series
High-Limit Controllers
Critical safety pressure controllers for industrial steam and boiler systems. Protect your equipment with reliable over-pressure shutdown.
Series Overview
The Honeywell L4079 Series consists of high-limit and safety pressure controllers specifically designed to protect industrial steam and boiler systems from over-pressure conditions.
These controllers operate as critical safety devices, initiating shutdown or control action when pressure exceeds predefined safe limits.
Functional Role in Safety Systems
L4079 Series controllers are widely used in:
- Industrial steam boiler safety systems
- High-limit pressure shutdown applications
- Boiler and HVAC system safety control
- Systems requiring automatic recycle or manual reset protection
Key Differences
Key Differences & Selection
Key differences between L4079 models include:
- Reset Function: Options for Manual Reset (requiring operator intervention) or Automatic Recycle.
- Pressure Range: Varying pressure ranges and limit setting capabilities.
- Application Focus: Specialized for steam boilers vs. general HVAC safety.
- Duty Cycle: Heavy-duty variants available for continuous industrial operation.
Applications
- Industrial steam boiler safety
- High-limit pressure shutdown
- Boiler & HVAC system protection
- Manual reset safety applications
- Automatic recycle pressure control
Model Comparison
L4079 Series Model Comparison
| Model | Control Function | Reset Type | Typical Application |
|---|---|---|---|
| L4079A1050/U | High-Limit Safety | Manual Reset | Safety shutdown |
| L4079B1033/U | High-Limit Safety | Auto Recycle | Steam systems |
| L4079B1041/U | Safety Pressure Control | Auto Recycle | Boiler & HVAC |
| L4079B1066/U | Heavy-Duty Safety Control | Auto Recycle | Industrial boilers |
L4079A Models
Choose where manual safety reset is required (safety lockout).
L4079B Models
Select for systems allowing automatic recycle after pressure normalization.
Heavy Duty
Preferred for continuous industrial boiler operation.
Ensure System Safety
Contact our team for L4079 safety controller selection and compliance advice.