Ashcroft
Ashcroft B424VXCYLM15 Pressure Switch 1.5-15 psi 1/4 FNPT SPDT
Monitors pressure from 1.5 to 15 psi and switches a 15 A AC circuit through an SPDT contact
- Adjustable pressure control with 1.5 to 15 psi range
- Reliable switching via SPDT diaphragm actuation
- Durable protection meeting NEMA 13, 3, 4, 4X ratings
- Versatile wiring with 15 A AC at 125, 250, 480 V
- Precise DC handling at 0.25 A 125 V, 0.5 A 120 V, 6 A 30 V
Pressure switch for 1.5–15 psi systems
The Ashcroft B424VXCYLM15 is a diaphragm-actuated pressure switch with a single 1/4 in FNPT port and an SPDT contact form. It covers a working range of 1.5 to 15 psi with a differential of .5 to 1.5 psi and is factory set at 90 percent of range. NEMA 13, 3, 4 and 4X ratings suit indoor and outdoor industrial environments.
Ratings define thermal and electrical limits
AC contact ratings are 15 A at 125 V, 250 V and 480 V while DC ratings reach .25 A at 125 V, .5 A at 120 V and 6 A at 30 V. The diaphragm action and standard actuation respond directly to process pressure without external power draw. Enclosure ratings protect the mechanism from dust, water and oil ingress during normal operation.
Single-port SPDT fits basic control loops
The 1/4 in FNPT connection threads into existing pipework and the SPDT output provides both normally-open and normally-closed paths for alarm or pump control. Factory preset at 90 percent of range reduces initial calibration time. Builders needing adjustable differential, multiple ports or a different pressure span will require a different switch configuration.
Highlights
- Adjustable pressure control with 1.5 to 15 psi range
- Reliable switching via SPDT diaphragm actuation
- Durable protection meeting NEMA 13, 3, 4, 4X ratings
- Versatile wiring with 15 A AC at 125, 250, 480 V
- Precise DC handling at 0.25 A 125 V, 0.5 A 120 V, 6 A 30 V
Specifications
| Brand | ASHCROFT |
|---|
Questions about this item
How do I install the 1/4 FNPT port and what wiring mistake should I avoid?
Thread the 1/4 FNPT port into the process line using sealant on male threads only; wire the SPDT contacts for the intended circuit — AC up to 15 A at 125/250/480 V or DC per the 0.25 A @ 125 V, 0.5 A @ 120 V, 6 A @ 30 V ratings — and never exceed the DC limits on an AC-rated load.
What maintenance will the diaphragm need over time?
Inspect the diaphragm annually for cracking or set; clean the single port if debris restricts pressure transmission, and replace the switch if the differential drifts beyond the 0.5 to 1.5 psi window.
At what pressure does the switch hit its upper limit during sustained operation?
The adjustable range tops out at 15 psi; the factory on/off setting is calibrated at 90 percent of range, so sustained pressure above 15 psi exceeds the design limit and will prevent proper reset.
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