140-175 PSI, Heavy Duty American Made Air Compressor Pressure Switch, Includes Rotating Unloader and On Off Lever, Four 1/4″ NPT Ports, Made in USA

Description

Product Overview

The Hubbell 140-175 PSI heavy‑duty air compressor pressure switch is engineered for demanding industrial applications where reliability and precision are paramount. Constructed from high‑grade cast iron and corrosion‑resistant alloys, the switch offers exceptional durability and long‑term performance even in harsh environments. The integrated rotating unloader valve can be positioned in any of eight orientations, allowing flexible installation on the front or either side of the unit to suit a wide range of system layouts. Four 1/4″ female NPT ports provide ample connection points for multiple downstream components, such as regulators, gauges, and safety valves, enabling comprehensive pressure management across complex pneumatic networks. The side‑mounted on/off lever offers intuitive manual control, while the internal contacts are rated for 120 V/240 V single‑phase and 208 V/230 V/460 V three‑phase configurations, ensuring compatibility with a broad spectrum of motor starters and control panels. Designed and assembled in the United States, this pressure switch meets rigorous industry standards and carries the trusted Hubbell brand reputation for quality and engineering excellence.

Usage

This pressure switch is ideally suited for a variety of industrial settings, including manufacturing plants, automotive workshops, and construction sites where air compressors power pneumatic tools, spray equipment, and material handling systems. Its robust construction and adjustable pressure range make it an excellent choice for continuous‑run compressors that must maintain consistent output pressure to protect sensitive equipment and ensure optimal tool performance. The rotating unloader feature allows technicians to customize the valve orientation to accommodate space constraints and streamline piping layouts, reducing installation time and minimizing the need for additional fittings. The four NPT ports enable simultaneous connection to pressure gauges, safety relief valves, and downstream regulators, providing comprehensive monitoring and control capabilities. Whether used in a fixed‑installation compressor station or a mobile air supply unit, the switch delivers precise cut‑in and cut‑out pressure points, helping to extend compressor life, reduce energy consumption, and maintain safe operating conditions.

Why Choose Us

Choosing the Hubbell pressure switch means selecting a product backed by decades of engineering expertise and a commitment to American manufacturing standards. Each unit undergoes rigorous testing procedures, including pressure cycling, electrical endurance, and environmental exposure, to verify that it meets or exceeds OEM specifications. Our dedicated support team provides technical assistance throughout the product lifecycle, from initial selection and installation guidance to troubleshooting and warranty service. We stand behind the durability of our switches with a comprehensive warranty that covers material defects and workmanship, reflecting our confidence in the product’s long‑term reliability. Additionally, the modular design of the rotating unloader and multi‑port manifold simplifies maintenance and reduces downtime, allowing service personnel to quickly adjust or replace components without extensive disassembly. By integrating this switch into your pneumatic system, you benefit from precise pressure regulation, enhanced safety features, and the peace of mind that comes from using a trusted, American‑made component.

Key Features

• Heavy‑duty cast iron construction ensures long‑lasting durability in harsh industrial environments.
• Rotating unloader valve can be set in eight positions for flexible installation and optimal piping layout.
• Four 1/4″ NPT ports provide versatile connections for gauges, regulators, and safety devices.
• Side on/off lever offers easy manual control while allowing integration with automated control circuits.
• Comes with dedicated technical support and a comprehensive warranty for added customer confidence.

FAQ

What pressure range does this switch cover?

The switch is factory preset for a cut‑in pressure of 140 PSI and a cut‑out pressure of 175 PSI, with an adjustable differential range of 30‑40 PSI, allowing fine‑tuning to match specific compressor requirements.

Can the unloader be mounted on the side of the switch?

Yes, the rotating unloader is designed for front or side mounting. It can be rotated to any of eight positions, giving installers the flexibility to position the valve where it best fits the system layout, reducing the need for additional pipe bends or fittings.

Is this switch compatible with three‑phase motor starters?

Absolutely. The switch is rated for 208 V, 230 V, and 460 V three‑phase applications when wired to control voltage on a three‑phase motor starter, making it suitable for a wide range of compressor power configurations.

How does the on/off lever function in automated systems?

The side‑mounted on/off lever provides a manual override for the compressor. In automated systems, the lever can be left in the “On” position while the control circuitry manages start‑stop functions, ensuring the switch does not interfere with electronic control signals.

What warranty coverage is provided?

Hubbell offers a standard one‑year warranty covering any material or workmanship defects. This warranty includes replacement of faulty components and technical support to assist with installation, adjustment, and troubleshooting throughout the coverage period.