L4079B1041 | Honeywell PressureTrol® High-Limit Pressure Controller 10–150 psi

Honeywell · PLCs & Industrial Controllers

Description  The Honeywell L4079B1041 is a high-pressure limit controller (PressureTrol®) offering manual reset functionality to protect systems from overpressure. It is suitable for steam, air, noncombustible gases, and non-corrosive fluids, and is designed to open a circuit via a snap-acting microswitch when pressure exceeds a preset threshold. Its robust stainless steel diaphragm and multiple mounting options ensure dependable protection in industrial environments.     Technical Specifications  Condition New/Never Used Surplus Brand Honeywell Category Controls & Indicators Part Number L4079B1041 Subcategory Pressure Control Switch Type SPST (single pole, single throw) Switch Action Break on pressure rise Reset Type Manual Reset Operating Pressure Range 10 to 150 psi Maximum Pressure 225 psi Diaphragm Material Stainless Steel Electrical Connections Screw Terminals Mounting Options ¼″ NPT diaphragm port or surface mount through back Trip-Free Mechanism Yes Vibration Resistance Moderate vibration immunity Ambient Temperature Rating Up to 150 °F (66 °C) Media Compatibility Steam, air, non-combustible gases, non-corrosive fluids Housing Material Likely metal or rugged enclosure (industrial grade) Contact Voltage Rating Typically rated for 120/240 Vac (standard control) Weight 2.10 lbs     Information About L4079B1041 The L4079B1041 is part of Honeywell’s L4079 series of PressureTrol® limit controllers, intended to function as safety or high-limit devices in pressure systems. It uses a stainless steel diaphragm as the sensing element, making it compatible with steam, gases, and fluids that do not corrode stainless steel. When system pressure rises beyond the set point, the internal SPST microswitch snaps open, interrupting the circuit; the switch must then be manually reset to resume operations. It mounts via a ¼″ NPT female diaphragm connection or through the back of the case, providing flexibility in panel or inline installation. Key Features: Manual Reset Limit: Once triggered by excessive pressure, the switch must be manually reset, preventing automatic reactivation after a fault. SPST Break-on-Rise Switch: The internal microswitch opens the circuit when pressure increases past the set point, ensuring fail-safe control. Stainless Steel Diaphragm: Designed for contact with steam, air, noncombustible gases, or noncorrosive fluids, resisting degradation in harsh environments. Preset Pressure Range: Factory range of 10 to 150 psi, with the capability to handle maximum pressures up to 225 psi. Versatile Mounting: Can be installed via ¼″ NPT female diaphragm port or surface-mounted through the back of the housing. Reset-Free Design: Its trip-free mechanism ensures the switch cannot be held closed (defeating the limit function) by force. Vibration-Resistant: The internal mechanism is designed to resist moderate vibration without false tripping or malfunction. Simple Electrical Interface: Screw terminal connections allow straightforward wiring for control circuits. Low-Temperature Capability: Rated for service in ambient conditions where the maximum temperature is 150 °F (≈ 66 °C). The L4079B1041 delivers dependable overpressure protection for HVAC, boiler, compressor, and general process control systems.

Brand: Honeywell · Category: PLCs & Industrial Controllers

Key features

• Manual Reset Limit: Once triggered by excessive pressure, the switch must be manually reset, preventing automatic reactivation after a fault.
• SPST Break-on-Rise Switch: The internal microswitch opens the circuit when pressure increases past the set point, ensuring fail-safe control.
• Stainless Steel Diaphragm: Designed for contact with steam, air, noncombustible gases, or noncorrosive fluids, resisting degradation in harsh environments.
• Preset Pressure Range: Factory range of 10 to 150 psi, with the capability to handle maximum pressures up to 225 psi.
• Versatile Mounting: Can be installed via ¼″ NPT female diaphragm port or surface-mounted through the back of the housing.
• Reset-Free Design: Its trip-free mechanism ensures the switch cannot be held closed (defeating the limit function) by force.
• Vibration-Resistant: The internal mechanism is designed to resist moderate vibration without false tripping or malfunction.
• Simple Electrical Interface: Screw terminal connections allow straightforward wiring for control circuits.
• Low-Temperature Capability: Rated for service in ambient conditions where the maximum temperature is 150 °F (≈ 66 °C).

Specifications

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