Description
The Ashcroft B424B-30 is a general-purpose pressure switch engineered for dependable performance across a wide range of HVAC, industrial, and mechanical system applications. With a 0–30 PSI operating range and a single-pole double-throw (SPDT) switching action, this switch provides precise pressure-activated control for both normally open and normally closed circuit configurations — giving installers maximum wiring flexibility.
Built to withstand demanding environments, the B424B-30 features a Buna N (nitrile rubber) diaphragm seal that offers excellent resistance to oils, fuels, and a broad spectrum of fluids commonly encountered in mechanical systems. The watertight NEMA 4X enclosure protects internal components from dust, moisture, and corrosion, making it suitable for both indoor and outdoor installations where environmental exposure is a concern.
The 1/4″ NPT process connection ensures straightforward integration into standard piping and tubing systems, minimizing installation time and the need for additional adapters.
Key Features
- Pressure range: 0–30 PSI
- Switch action: Single-Pole Double-Throw (SPDT)
- Process connection: 1/4″ NPT
- Seal material: Buna N (nitrile rubber) — resistant to oils, fuels, and common system fluids
- Enclosure rating: NEMA 4X watertight — suitable for wet, corrosive, and outdoor environments
- General-purpose design for broad HVAC and industrial compatibility
Applications
- HVAC system pressure monitoring and control
- Hydronic heating and cooling systems
- Compressor and pump protection circuits
- Industrial process control panels
- Outdoor and wash-down environments requiring NEMA 4X protection
Why Choose the Ashcroft B424B-30?
Ashcroft is a globally recognized leader in pressure measurement and control instrumentation. The B424B series combines rugged construction with reliable switching performance, making it a trusted choice for HVAC professionals and mechanical contractors who need a pressure switch that performs consistently in real-world conditions. The NEMA 4X rating and Buna N seal ensure long service life even in challenging installation environments.
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