Description
Honeywell L91D1031 Proportional Pressuretrol Controller Overview
The Honeywell L91D1031 is a precision-engineered Proportional Pressuretrol Controller designed for reliable pressure sensing and modulating control in a wide range of HVAC and industrial applications. With a broad 5–150 PSI operating pressure range and an 11–52 PSI adjustable pressure differential, this controller delivers accurate, proportional output to match system demand — making it an ideal choice for steam, air, noncombustible gas, and other non-corrosive fluid systems.
Key Features
- Operating Pressure Range: 5–150 PSI for versatile system compatibility
- Pressure Differential: 11–52 PSI adjustable range for precise control response
- Dual Potentiometer design for independent setpoint and differential adjustment
- 140 Ohm output resistance for proportional signal compatibility
- 1/4″ NPT external thread connection for easy installation into standard piping
- Compatible with steam, air, noncombustible gas, and other non-corrosive fluids
- Brass body construction for durability and corrosion resistance
Applications
- Steam heating systems requiring proportional pressure modulation
- Compressed air systems with variable pressure control needs
- Noncombustible gas distribution and control systems
- Hydronic and boiler systems using non-corrosive fluid media
- Commercial and industrial HVAC pressure control loops
Why Choose the Honeywell L91D1031?
The L91D1031’s proportional control action provides smooth, continuous modulation rather than simple on/off switching, reducing system wear and improving overall efficiency. The dual potentiometer configuration allows technicians to independently set the control point and the throttling range, offering exceptional flexibility during commissioning and fine-tuning. The 1/4″ NPT external thread connection ensures compatibility with standard pipe fittings, while the brass construction withstands the demands of pressurized steam and gas environments.
Specifications
- SKU: L91D1031
- Brand: Honeywell
- Operating Pressure Range: 5–150 PSI
- Pressure Differential Range: 11–52 PSI
- Output Resistance: 140 Ohms
- Control Type: Proportional (Dual Potentiometer)
- Connection: 1/4″ NPT External Thread
- Body Material: Brass
- Compatible Media: Steam, Air, Noncombustible Gas, Non-Corrosive Fluids
