14
Appendix A
The probe for measuring the moisture of compressed air should be placed directly on the pressure
pipelines to achieve higher measurement accuracy and fast response times. But they are cases
where such placement is not possible. The reason is the high air speed, high temperature, high
pollution, small diameter pipes, etc. Such situation can be solved by placing the probe into the flow
measuring chamber. The picture shows the basic layout of the sampling system with flow chamber
SH- PP.
1 ….sampling
2 ….closing valve
3 ….probe
4 ….flow chamber SH-PP
5 ….closing valve
6 ….outlet tube
Sampling (1)
- end of the tube placed in the centre of pressure pipelines (distribution of moisture in
the pipe cross-section is not homogeneous). To achieve fast response times to shorten the
length of the sample tubes to a minimum (few meters).
Closing valve (2) -
allows access to the sample system without interrupting the main line
Closing valve (5) -
the sample flow is regulated by this valve. Measurement accuracy is typically
not affected by the sample flow rate, but at low speeds, increasing response time.
Outlet tube (6) -
if the measured sample of air is released into the atmosphere, select the length of
the outlet tube of 1.5 m (recommended for tube diameter 6mm). The reason is to ensure the
accuracy of the sample in the flow chamber and avoid back
diffusion of moisture from the ambient air.
Technical specification
–
flow chamber SH-PP
Material of flow chamber:
stainless
steel
(DIN 1.4301)
Inlet and outlet connection:
G1/8
Probe connection:
G1/2
Sample flow rate:
0.1 to 3 l/min
Operating pressure:
up to 25 bar
Weight:
580 g
Note:
Fittings not included in the delivery
Summary of Contents for Commeter AR006274
Page 7: ...7 Dimensions ...
