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Ashcroft B424 pressure switch, compact metal housing, 1/4 FNPT port, SPDT contacts

Ashcroft

Ashcroft B424VXCYLM30 Pressure Switch SPDT 3-30 psi 1/4 FNPT NEMA 13 4 4X

SKU CH-EMAJ-7S49W

Pressure switch with SPDT contacts covering 3 to 30 psi range and NEMA 13, 3, 4, 4X enclosure

  • Adjustable pressure range 3 to 30 psi for versatile system control
  • SPDT contact form enables single-pole double-throw switching logic
  • NEMA 13, 3, 4, 4X rating protects against dust, water and oil ingress
  • 15 A AC rating at 125, 250 and 480 volts handles heavy electrical loads
  • Factory on/off preset at 90 percent of range simplifies installation

Purpose-built pressure control

The Ashcroft B424VXCYLM30 is a diaphragm-actuated pressure switch designed for industrial machinery and process equipment. It covers a 3 to 30 psi range with a .5 to 1.5 psi differential and SPDT contact form. The 1/4 in FNPT port and NEMA 13, 3, 4, 4X enclosure suit demanding environments.

Upgrade from fixed-setpoint switches

Adjustable range and differential let technicians match cut-in and cut-out points to the application instead of accepting factory presets. The 90 percent factory on/off setting provides a ready baseline. The jump is worth it when a process needs tighter pressure bands or when a single switch must serve multiple pressure settings across equipment.

Integration into control panels

SPDT contacts rated at 15 A for 125, 250 and 480 V AC and 6 A at 30 V DC connect directly to motor starters, relays or PLC inputs. The NEMA-rated housing mounts without extra sealing in wash-down or outdoor locations. The single 1/4 in FNPT port simplifies piping to the pressure source.

How it compares

Measured against everything we stock in Contactors, Relays & Motor Starters, at today’s prices. Recalculated every night.

Price $168.99
Pricier than about 87% of the 1,098 comparable items (median $61.99).

Specifications

Product
Brand nameASHCROFT

Questions about this item

What pipe thread size does the 1/4 FNPT port on the B424VXCYLM30 require?

The switch has a single 1/4 inch FNPT port that accepts standard 1/4 inch male NPT fittings.

Which wiring step on the SPDT contacts is most often missed during installation?

Connecting the common, normally open and normally closed terminals to match the desired circuit action; the factory sets the switch at 90 percent of the 3 to 30 psi range.

How often should the diaphragm actuation be inspected on this NEMA 13, 3, 4, 4X switch?

Inspect the diaphragm annually or per site maintenance schedule; the snap-acting SPDT contacts are rated 15 A at 125, 250 and 480 VAC and 6 A at 30 VDC.

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