L408B-1131 | Honeywell Vaporstat Controller 0–160 oz Low-Pressure Steam Control
Honeywell · PLCs & Industrial Controllers
Description The Honeywell L408B-1131 is a Vaporstat controller designed for accurate low-pressure regulation in steam heating systems. With an adjustable range of 0–16 oz/in² (0–160 ounces), it provides precise pressure control to protect boilers and optimize system efficiency. This controller is commonly used in residential and light commercial steam applications requiring sensitive pressure management. Technical Specifications Condition New/Never Used Surplus Brand Honeywell Category HVAC Controls Part Number L408B-1131 Subcategory Pressure Controls Product Type Vaporstat Controller Pressure Range 0–160 oz/in² (0–10 psi) Control Type Low-Pressure Steam Sensing Element Diaphragm Application Steam Boiler Systems Mounting Type Surface / Panel Mount Switching Action Pressure-Activated Mechanical Switch Enclosure Type Industrial Control Housing Frequency 50/60 Hz (Typical Boiler Control Circuits) Weight 2.00 lb Information About L408B-1131 The L408B-1131 is part of Honeywell’s L408 Series Vaporstat controls, engineered specifically for low-pressure steam systems where conventional pressuretrol devices lack sufficient sensitivity. It features an adjustable pressure setpoint within the 0–160 ounce range and incorporates a diaphragm-operated sensing mechanism for responsive control. The unit is typically panel or surface mounted and integrates directly into boiler control circuits for burner cycling based on steam pressure. Its robust enclosure and mechanical switching design ensure dependable operation in heating and HVAC control environments. Key Features: Low-Pressure Range (0–160 oz/in²): Provides fine control for steam systems operating at very low pressures. Adjustable Setpoint: Allows precise calibration to meet specific boiler requirements. Diaphragm Pressure Sensing: Ensures accurate and responsive switching action. Boiler Control Integration: Designed for direct connection into steam burner control circuits. Mechanical Switching Mechanism: Delivers consistent and repeatable performance. Durable Enclosure Construction: Suitable for HVAC and boiler room environments. Steam System Optimization: Helps maintain efficiency and prevents excessive pressure buildup. The L408B-1131 delivers the reliability and precision required for low-pressure steam boiler control applications.
Brand: Honeywell · Category: PLCs & Industrial Controllers
Key features
- Low-Pressure Range (0–160 oz/in²): Provides fine control for steam systems operating at very low pressures.
- Adjustable Setpoint: Allows precise calibration to meet specific boiler requirements.
- Diaphragm Pressure Sensing: Ensures accurate and responsive switching action.
- Boiler Control Integration: Designed for direct connection into steam burner control circuits.
- Mechanical Switching Mechanism: Delivers consistent and repeatable performance.
- Durable Enclosure Construction: Suitable for HVAC and boiler room environments.
- Steam System Optimization: Helps maintain efficiency and prevents excessive pressure buildup.
Specifications
| Manufacturer part number | L408B-1131 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Honeywell |
| Category | HVAC Controls |
| Part Number | L408B-1131 |
| Subcategory | Pressure Controls |
| Product Type | Vaporstat Controller |
| Pressure Range | 0–160 oz/in² (0–10 psi) |
| Control Type | Low-Pressure Steam |
| Sensing Element | Diaphragm |
| Application | Steam Boiler Systems |
| Mounting Type | Surface / Panel Mount |
| Switching Action | Pressure-Activated Mechanical Switch |
| Enclosure Type | Industrial Control Housing |
| Frequency | 50/60 Hz (Typical Boiler Control Circuits) |
| Weight | 2.00 lb |
| Product type | Pressure Controls |
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