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SPEEDAIRE 4ZK94 filter regulator aluminum body metal bowl sight gauge knob adjustment

SPEEDAIRE

SPEEDAIRE 4ZK94 Filter/Regulator 3/8 NPT 163 cfm 250 psi

SKU CH-HMEJ-3ZN6S

A filter-regulator with 163 cfm flow, 250 psi rating and 40 micron particulate filtration

  • Clean air delivery with 40 micron particulate filtration
  • Precise pressure control up to 250 psi maximum operating pressure
  • High flow capacity rated at 163 cfm for demanding tools
  • Durable aluminum body with metal bowl and sight gauge
  • Compact 3.15 in width fits tight installations

Application fit

The SPEEDAIRE 4ZK94 is a filter/regulator designed for compressed-air systems that need particulate removal and pressure control in one unit. It suits workshops and industrial lines where a 40 micron filter rating and a maximum flow of 163 cfm match the demand. Buyers who need an integrated pressure gauge or automatic drain should look elsewhere because this model includes neither.

Installation checks

Verify that your supply piping uses 3/8 in NPT female threads to match the inlet. Confirm the system pressure never exceeds 250 psi and that the flow direction left to right aligns with your layout. Allow at least 11.93 in of vertical clearance for the metal bowl with sight gauge and 3.15 in of width for the aluminum body. Ensure a manual drain routine fits your maintenance schedule.

Thermals noise power

The aluminum body dissipates heat from the compressed air stream without a fan so operation is silent. Pressure drop across the 40 micron element creates the only energy loss and it scales with flow up to 163 cfm. No electrical supply is required so there is no power draw to budget. The manual drain valve releases condensate without consuming air when closed.

Highlights

  • Clean air delivery with 40 micron particulate filtration
  • Precise pressure control up to 250 psi maximum operating pressure
  • High flow capacity rated at 163 cfm for demanding tools
  • Durable aluminum body with metal bowl and sight gauge
  • Compact 3.15 in width fits tight installations

Specifications

BrandSPEEDAIRE

Questions about this item

What comes in the box with the 4ZK94 filter/regulator?

The unit includes a metal filter bowl with a sight gauge, a reinforced nylon adjustment knob, and an aluminum body with 3/8 NPT female inlet and outlet ports.

How do I decide between the 163 cfm flow rating and the 250 psi pressure limit for my system?

Choose based on your compressor output: 163 cfm is the maximum volume the unit can pass, while 250 psi is the highest pressure it can safely regulate.

What does the 40 micron filter rating mean for daily shop use?

It traps particles 40 microns and larger, protecting downstream tools from coarse debris while allowing high flow with minimal pressure drop.

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