RKI Instruments GD-K77D - Manual (Page 23)

Model GD-K77D Operator’s Manual Installation • 18
Tubing Connections
Tube Fittings
Two tube fittings are provided for sampling, one for inlet and one for exhaust. The fittings
accept 4 mm (ID) x 6 mm (OD) Teflon tubing.
Figure 8: Inlet/Exhaust Fitting Use
Flow Rate
The flow rate of the Model GD-K77D is 0.5 L/M (liters per minute)
Tubing Material
The tubing materials you choose will depend upon the target gas being detected. Some
target gases are corrosive while others are absorptive. Choose your tubing materials
carefully for both length and material. RKI Instruments recommends PTFE Teflon tubing.
4 x 6 mm Teflon
PTFE Tubing
Nut
Ferrule
Tubing
Insert