Brass Silencer/Muffler Dimensions (Units in mm)
Part No.	Part No.	Port (NPT)	A	B (hex)	C	D (hex)	E (closed)
BSL N1/8	BESL N1/8	1/8″	22.7	12	25	12	9.7
BSL N1/4	BESL N1/4	1/4″	28.5	15	25.3	14	11.7
BSL N3/8	BESL N3/8	3/8″	35.7	18	29.6	17	15.8
BSL N1/2	BESL N1/2	1/2″	39.3	21	35.8	21	21.1
Dimensions for Reference Use Only: Imperial fittings in mm, Metric fittings in mm, U.S.O.

Brass Fitting Operating Guide

• • Installation of Pipe Fittings
    • Apply an appropriate sealant to the thread, tighten the fitting by hand, then turn it 2 to 3 turns with a wrench until it reaches the desired torque listed below.
      

      Recommendation of Torque for Tightening Fittings
      Fitting Thread Size	Torque, lb-ft	Torque, kgf/cm
      NPT 1/8, R1/8	5 – 6.5	70 – 90
      NPT 1/4, R1/4	8.5 – 10	120 – 140
      NPT 3/8, R3/8	16 – 17.5	220 – 240
      NPT 1/2, R1/2	20 – 21.5	280 – 300

       

  • Installation of Tubing into Fitting:
    • Slowly push a clean and perpendicularly cut tube into the fitting until it comes to a dead stop.
    • Gently pull the tubing back until the Collet of the fitting grips onto the tubing and has a good seal.
    • Use Polyethylene, Polypropylene, Polyurethane, or Nylon tubing designed for instant fittings. Hard metal tubing, such as Stainless Steel tubing can be used if the tubing is grooved first.

• • Removal of Tubing from Fitting:
    • Push in evenly on the two sides of the Release Button.
    • Pull out the tube while depressing the Release Button.
    • To reuse the tubing, cut off the lodged portion of the previously used tubing in an even and perpendicular fashion.

• • Recommended Tubing Material, Size, and Hardness Requirements:
    

    Tubing Material	Specified Size	Tubing Size Tolerance
    Polyurethane	+/- 0.004″ max.	+/-0.1 mm max.
    Polyethylene	+/- 0.006″ max.	+/-0.15 mm max.
    Polypropylene	+/- 0.004″ max.	+/-0.1 mm max.
    Nylon	+/- 0.004″ max.	+/-0.1 mm max.
    Pre-grooved Metal Tubing	+/- 0.004″ max.	+/-0.1 mm max.

     

  • Storage:
    • Store fittings in a dry, cool place and away from sunlight.

• Specifications, Materials of Construction, and Schematic of Typical Construction:
  

  Specifications
  Operating Pressure Range	0 – 250 PSI (0 – 1650 kpa)
  Vacuum	0 – 29.5″ Hg (750 mm Hg)
  Operating Temperature	5 – 230°F (-15 – 110°C)
  Recommended Tubing Material	Polyurethane, Nylon, Polyethylene, Polypropylene. Hard metal tubing can be used if tubing is grooved first.
  Materials of Construction
  Metal Body	Nickel-Plated Brass
  One piece combination Release Button & Collet	Nickel-Plated Brass
  O-Ring/Packing	NBR