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Parker 4-way manual air valve, aluminum body, lever actuator, 1/4 NPT ports

Parker

Parker 521831000 4-Way 1/4 NPT Manual Air Control Valve trap

SKU CH-P4DX-3QQZG MPN 521831000

A 4-way manual air control valve with 1/4 NPT ports, 0.83 cfm flow and 150 psi rating for pneumatic systems

  • TypeDrain Components
  • Manual 4-way control directs airflow precisely
  • 1/4 NPT ports integrate with standard pneumatic lines
  • 150 psi rating handles demanding compressed-air systems
  • .83 cfm flow capacity supports efficient operation
  • Aluminium body resists corrosion for long service life

4-Way Manual Air Valve

The Parker 521831000 is a 4-way, 3-position manual air control valve with a 1/4 inch NPT port. Its aluminum body measures 5 3/4 inches long and operates at up to 150 psi. The lever actuator returns manually and the center position is closed.

Pneumatic system builders

This valve suits installers needing a direct-acting 4-way valve with a 0.83 cfm flow coefficient and a 0.8 Cv rating. It is not for systems requiring solenoid actuation, higher flow capacities, or port sizes other than 1/4 inch NPT.

150 psi pressure rating

The maximum pressure rating of 150 psi determines if this valve matches the circuit design. The operating temperature range spans 32 to 175 degrees F. Verify the system pressure before installation.

Highlights

  • Manual 4-way control directs airflow precisely
  • 1/4 NPT ports integrate with standard pneumatic lines
  • 150 psi rating handles demanding compressed-air systems
  • .83 cfm flow capacity supports efficient operation
  • Aluminium body resists corrosion for long service life

Specifications

TypeDrain Components
BrandParker
Model521831000

Questions about this item

Should I choose the 4-way 3-position version or a 2-way alternative for my pneumatic circuit?

The 4-way 3-position design with center closed lets you pressurize, exhaust and hold a double-acting cylinder from one valve — a 2-way cannot do that.

What does the 0.83 cfm rating mean when the valve is installed on a live air line?

At 150 psi supply the valve passes up to 0.83 cfm, so a small bore cylinder will stroke at moderate speed without starving the actuator.

How does the 1/4 NPT connection limit the flow I can actually get?

The 1/4 NPT ports and 0.8 Cv cap practical flow to the rated 0.83 cfm; larger tubing or fittings will not increase throughput past that limit.

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