WAGNER PROTEC 2K, Перевод оригинального руководства по эксплуатации

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PROTEC 2K
OPERATING MANUAL
VERSION 02/2016 ORDER NUMBER DOC2352824
5.10.2
HOSE SELECTION
Hose selection with external mixer
The volume ratio of product hoses A and B should match the mixing ratio. If this is not the
case, the hoses will respond to changes in pressure at diff erent speeds. One hose will reach
the new pressure sooner than the other. This causes short-term errors in the mixing ratio.
Diff erent levels of hose viscosity and fl exibility also cause short-term errors in the mixing
ratio. The longer the hoses the greater the eff ect.
Suitable hose combinations for diff erent mixing ratios
Hose A Hose B Volume ratio * Mixing ratio
Inside - Connection Inside - Connection Hose A : hose B A : B
DN13 1/2" DN6 1/4" 4 : 1
4 : 1
3 : 1
DN10 3/8" DN6 1/4" 2.25 : 1
3 : 1
2 : 1
DN13 1/2" DN10 3/8" 1.78 : 1
2 : 1
1.5 : 1
DN10 3/8" DN10 3/8" 1 : 1
1.5 : 1
1 : 1
* with eff ective inner diameters of 6.4 mm (DN6), 9.6 mm (DN10), and 12.8 mm (DN13)
Select large hose diameters for viscous products.
Detecting short-term mixing errors
Should the pressure change, product pressure gauges A and B should respond as
synchronously as possible. Short-term errors in the mixing ratio occur at the following points:
At the reversal points of the air motor, pressure gauge B indicates a bigger drop in
pressure than pressure gauge A.
When opening the gun, pressure gauge B responds much later than pressure gauge A.
Rectifying short-term mixing errors
Use a diff erent hose combination (see Table).
Too great a drop in pressure on the B side can be corrected with a throttle valve
(see Chapter 5.10.3).