Add-A-Stack® 4020

The Add-A-Stack® 4020 valve is a multifunction valve originally designed to control cylinders and motors on truck applications. The enclosure is a cost effective solution to protect the valve from typical corrosion problems of exposed valves. A simple rubber latched cover employs a gasketless weather resistant seal design that stops harmful salt spray.

  • Stackable high and low flow sections
  • Five different valve operators available
    • -Valve can be controlled by cable, electric on/off, electro-proportional, and pneumatic or hydraulic piloted remote
  • Gear pump or load-sensing versions available
    • -Adaptable to open center or closed center systems
  • Work port options standard
    • -Reliefs, anti-cavitations, checks, and combinations are available for each work port
  • Stackable Spin-A-Veyer® valve section
    • -A must to prevent spool and spool seal damage caused by corrosion
  • Optional individual section flow regulators
    • -Each section can be field adjusted to a desired maximum flow
  • Enclosure accommodates bulkhead style sealed cables
  • Prewired valve harnesses
  • Level ports all exit on bottom side to accommodate enclosures

Valve Specifications

  • Nominal inlet flow rating...............................................40 gpm*
  • Operating pressure (maximum)...............................3500 psi
  • Tank pressure (maximum)............................................300 psi
  • Minimum pressure requires (electric).................200psi
  • Temperature range..........................................................-40°F to +180° F
  • Fluid requirements...........................................................Petroleum based 50-4000 ssu
  • Filtration requirements................................................ISO 4406 18/14
  • Seals ........................................................................................BUNA-N
  • Mounting sensitivity......................................................None
  • Electrical Specifications
  • Rated voltage&hellip...................................................12 VDC
  • Coil resistance (at 68°)..............................................7.5 ohms
  • Maximum current rating.........................................2 amps
  • Watts....................................................................................20 watts
  • Duty cycle.......................................................................100%
  • Frequency........................................................................50 Hz pwm
  • Electric connector....................................................24”leadwire with Packard connector


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