An external adjustment screw accurately varies orifice opening from closed to full flow as required. The final position is then locked in place by the jam nut. 

Objectionable exhaust air noise is eliminated by the surrounding sleeve of sintered bronze.

SCM-Series speed control mufflers feature complete safety in operation. The sintered bronze sleeve is held securely in position and protected by an integral shroud. 

Standard pipe thread connections provide easy attachment to equipment. Unit should be mounted in a protective position, free from excessive vibration.