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Silver aluminium compressed-air regulator with 3/8 NPT ports and black adjustment knob

SPEEDAIRE

SPEEDAIRE 4ZM19 air compressor regulator 3/8 NPT 208 cfm 300 psi

SKU CH-BZHA-E8RDY

Regulates compressed air to between 5 and 150 psi with a 208 cfm flow capacity and 300 psi maximum inlet pressure

  • Regulates air up to 150 psi for precise tool control
  • Handles 208 cfm flow to support high-demand pneumatic equipment
  • Rated for 300 psi inlet pressure for heavy-duty system compatibility
  • Aluminium body resists corrosion in workshop environments
  • Operates up to 175 °F for reliable performance in hot conditions

3/8 NPT compressed-air regulator

The SPEEDAIRE 4ZM19 is a new inline regulator built for shop and mobile compressed-air systems. It accepts 3/8 inch NPT female connections on both inlet and outlet and is rated for a maximum flow of 208 cfm. The aluminum body handles supply pressures up to 300 psi and regulates downstream pressure between 5 and 150 psi.

Sustained-load behaviour

Designed for intermediate-duty cycles, the regulator maintains set pressure during continuous flow without the droop seen in lighter units. The non-rising adjustment mechanism keeps the knob position constant while the internal piston balances force across the full 208 cfm range. Maximum operating temperature of 175 degrees Fahrenheit ensures stable performance in warm compressor rooms or enclosed vehicle bays.

5–150 psi regulated range

The 5 to 150 psi adjustment span is the single figure that decides fit: tools or circuits needing pressure outside this window require a different regulator. No pressure gauge is included, so a separate gauge must be plumbed downstream for visual monitoring. California Proposition 65 warnings apply to this product.

Highlights

  • Regulates air up to 150 psi for precise tool control
  • Handles 208 cfm flow to support high-demand pneumatic equipment
  • Rated for 300 psi inlet pressure for heavy-duty system compatibility
  • Aluminium body resists corrosion in workshop environments
  • Operates up to 175 °F for reliable performance in hot conditions

Specifications

BrandSPEEDAIRE

Questions about this item

Does the regulator generate noticeable heat or noise when running continuously at 208 cfm?

The regulator body is aluminium and has no moving parts that produce heat or noise; only the compressed air passing through creates flow sound.

What fittings must I already have to connect the 3/8 in NPT inlet and outlet?

You need 3/8 in NPT male threads on both the supply hose and the tool hose to match the female ports on the regulator.

Will the 5 psi to 150 psi adjustment range work with older air tools that need lower pressure?

Yes, the non-rising knob adjusts down to 5 psi, covering the low-pressure requirements of most vintage pneumatic tools.

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