Honeywell L4079B1033 Pressuretrol Limit Controller, 2–15 PSI, Manual Reset, SPST Break-on-Rise Switch, Stainless Steel Diaphragm

Honeywell L4079B1033 Pressuretrol Limit Controller, 2–15 PSI, Manual Reset, SPST Break-on-Rise Switch, Stainless Steel Diaphragm

Overview

The Honeywell L4079B1033 is a high-pressure limit controller designed to provide reliable safety control for steam, air, noncombustible gases, and non-corrosive fluids. It features a durable stainless steel diaphragm and a manual reset SPST switch that breaks the circuit on pressure rise to protect equipment from overpressure conditions.

Key Features

• Operating Pressure Range: 2 to 15 PSI, with a maximum pressure rating of 25 PSI

• Switch Action: Single Pole Single Throw (SPST) switch that opens on pressure rise

• Manual Reset: Requires manual reset after activation for controlled restart

• Robust Diaphragm: Stainless steel diaphragm compatible with steam, air, noncombustible gases, and non-corrosive fluids

• Flexible Mounting Options:

  • 1/4" NPT female internal thread for diaphragm assembly

  • Surface mount option through the back of the case

• Electrical Compatibility: Operates on 120Vac/240Vac power supplies

• Oil Applications: L4079W model variant designed specifically for oil systems

Technical Specifications

Applications

• Safety pressure limit control in steam, air, and noncombustible gas systems

• Protection of boilers, compressors, and related equipment

• Systems requiring manual reset to prevent automatic restart after a pressure fault

• Suitable for use with fluids non-corrosive to stainless steel diaphragms