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Mac Valves 821C-PM-221CA-152 4-Way Solenoid Piloted Spool Valve - 1/4 in. NPTF

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Double operator solenoid piloted spool valve for car wash, vacuum, and other applications requiring fast, consistent response time. 1/4" NPTF ports, 24VAC, 1/2" NPS conduit. Part of the MAC 800 Series.

*Picture is representative of of the MAC 800 Series. Valve may have a different appearance - read specs carefully.*

Technical Specifications

Inlet Port: 1/4 inch
Outlet Port: 1/4 inch
Voltage AC: 24
Min PSI: 20
Max PSI: 120
Min Temperature: 0 degrees F
Max Temperature: 120 degrees F

Product Description

4-Way Solenoid Piloted Spool Valve

The MAC 800 Series of inline solenoid valves includes excellent options for car wash, vacuum, diverter, or selector applications where fast response time, high shifting forces and long life are crucial. The MAC Valves 821C-PM-221CA-152 is a double operator 5/2 single pressure valve with a short stroke, conical seats, and a balanced poppet. The balanced poppet design facilities using the same valve for many functions without the necessity of changing any parts.


  • 1/4" NPTF port size
  • 4-way - can be configured to your needs
  • 24VAC, 50/60 Hz
  • Temperature Range: 0°F - 120°F (-18°C - 50°C)
  • Pressure Range: 20 - 120 PSI
  • Double, non-locking manual operator
  • Conduit 1/2" NPS electrical connection

Series Features:

  • Patented MACSOLENOID for fastest possible response times
  • Bonded balanced poppets for high flow, precise repeatability, and consistent operation.
  • Balanced poppet design permits versatility in piping.
  • Use on lube or non-lube service.
  • Extremely high cycle rates.
  • Extremely long service life due to unique poppet cushions.
  • Manual overrides as standard.

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