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Brass pneumatic muffler with 1/4 NPT male thread and 9/16 hex body

SPEEDAIRE

SPEEDAIRE Speed Control Muffler 1/4 NPT 9/16 Hex

SKU CH-6TRY-WDJ58

Brass pneumatic muffler with screwdriver-adjustable exhaust flow control, 1/4 NPT male thread, rated to 300 psi and 300°F maximum

  • Product typePneumatic
  • Adjust exhaust flow precisely with screwdriver adjustment
  • Brass body withstands 300 psi operating pressure
  • Functions reliably from 35 to 300 degrees Fahrenheit
  • OSHA-compliant design meets workplace safety standards
  • 1/4 inch NPT male port fits standard pneumatic lines

Speed Control Muffler 1/4 NPT

The SPEEDAIRE pneumatic muffler provides adjustable exhaust port flow control for motoring air applications. A screwdriver adjusts the flow rate through the 1/4 inch NPT male connection. The brass body operates at pressures up to 300 psi and temperatures between 35 and 300 degrees F. It meets OSHA standards for workplace use.

Upgrade from fixed mufflers

This valve replaces fixed orifice mufflers when airflow must be tuned after installation. The adjustment is worthwhile when equipment speed or noise levels change between tasks. Buyers who need a non-adjustable silencer or a different port thread will not find a match here. The screwdriver slot allows quick changes without special tools.

Limits of NPT threaded connection

The 1/4 inch NPT male thread seals with tape or compound and fits standard pneumatic ports. Brass construction resists corrosion but is not suited for highly acidic or abrasive media. Maximum operating pressure of 300 psi and temperature ceiling of 300 degrees F define the safe envelope. California Proposition 65 warnings apply for chemical exposure.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 96% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameSpeedaire
Product typePneumatic

Questions about this item

What thread size and hex dimension does this muffler need for mounting?

It has a 1/4 NPT male connection and a 9/16 inch hex body for installation.

How do you adjust the flow on this muffler and what is a common mistake?

Adjust with a screwdriver; the common mistake is over-tightening the adjustment screw and damaging the needle valve.

What operating pressure and temperature limits should I watch for over the life of this muffler?

Maximum operating pressure is 300 psi with a temperature range of 35 to 300 degrees F.

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