Y Branch tee is the best way to lead off a machine from a duct system.

Having a smooth inner surface and a 45°angle there is no obstruction to the airflow.

Also,these are available in a range of sizes to suit the duct and machine extraction outlet. 

DCS-SY150-150+100 STANDARD Y BRANCH FROM 150MM TO 150MM AND 100MM, ROLLED EDGES ON BOTH ENDS

DCS-SY180-180+125 STANDARD Y BRANCH FROM 180MM TO 180MM AND 125MM, ROLLED EDGES ON BOTH ENDS

DCS-SY200-2X150 STANDARD Y BRANCH FROM 200MM TO 2X150MM, ROLLED EDGES ON BOTH ENDS

DCS-SY200-180+100 STANDARD Y BRANCH FROM 200MM TO 180MM AND 100MM, ROLLED EDGES ON BOTH ENDS

DCS-SY200-2X200 STANDARD Y BRANCH FROM 200MM TO 2X200MM, ROLLED EDGES ON BOTH ENDS

DCS-SY200-150+125 STANDARD Y BRANCH FROM 200MM TO 150MM AND 125MM, ROLLED EDGES ON BOTH ENDS

DCS-SY150-125+100 STANDARD Y BRANCH FROM 150MM TO 125MM AND 100MM, ROLLED EDGES ON BOTH ENDS