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Square D 9013FH pressure switch, grey metal housing, four ports, unload valve visible

SQUARE D

SQUARE D 9013FH Pressure Switch 95-125PSI 4Port Unload

SKU CH-D44K-3X3CV

Controls air compressor pressure at 95-125 psi with four ports and unloader valve

  • TypeLight Switch
  • Factory-set 95/125 psi cut-in/cut-out for immediate compressor control
  • 30 psi differential balances cycling frequency and pressure stability
  • Four 1/4 in FNPS ports simplify plumbing and unloader hookup
  • DPST contacts handle 1.5 hp at 120 V and 3 hp at 240 V three-phase
  • NEMA 1 enclosure suits indoor compressor installations

SQUARE D 9013FH Pressure Switch

This SQUARE D 9013FH pressure switch controls air compressor motors in the 95 to 125 psi range. It features a 30 psi differential and four 1/4 inch FNPS ports with an unloader valve. The NEMA 1 rated enclosure suits indoor installations. It is built for standard action on single and three-phase power systems.

Replaces worn compressor pressure controls

Install this switch when an existing control fails to cut in at 95 psi or cut out at 125 psi. The 30 psi differential restores proper cycling on units rated for 40 to 150 psi operation. It handles up to 1 1/2 hp at 120 V single-phase and 2 hp at 240 V single-phase. Three-phase ratings reach 3 hp at 240 V and 1 hp at 480 V.

Four-port manifold with unloader valve

The four 1/4 inch ports provide connections for tank, gauge, safety valve and unloader line in one block. The integrated unloader bleeds head pressure on shutdown for easier restarts. DPST contacts switch both motor legs simultaneously. The 9013FH series covers the stated horsepower range without additional relays.

Highlights

  • Factory-set 95/125 psi cut-in/cut-out for immediate compressor control
  • 30 psi differential balances cycling frequency and pressure stability
  • Four 1/4 in FNPS ports simplify plumbing and unloader hookup
  • DPST contacts handle 1.5 hp at 120 V and 3 hp at 240 V three-phase
  • NEMA 1 enclosure suits indoor compressor installations

Specifications

BrandSquare D
TypeLight Switch

Questions about this item

What size pipe threads do the four ports use?

Each of the four ports is 1/4 in FNPS thread, so fittings must match that size.

How do I wire the DPST contacts for a 120 V single-phase motor?

Connect both poles in series with the motor leads; the switch opens both lines when pressure reaches 125 psi and closes again at 95 psi.

When should I replace the unloader valve on this switch?

Replace the unloader if air leaks continuously from the valve after the compressor stops, indicating the internal seal has worn.

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