ART 22
Operating
When used for balancing water distribution systems, valves will always be in the fully open
position at commencement of any commissioning or flushing exercise.
Regulation is accomplished by rotating the handwheel clockwise when viewed
from the top of the handwheel.
The valve is opened by anti-clockwise rotation of the handwheel to a positive stop.
Further effort is not necessary. When fully open it is advantageous to rotate the
handwheel clockwise 1/2 turn.
To close the valve, the handwheel is rotated clockwise to a positive stop.
Test points
Valves are supplied with test points fitted.
Operation
The commissioning stage is the only time that the valve will normally have any attention.
During this stage, all entrained air must be removed from the system before
accurate measurements of differential pressure signals can be taken from the test
points.
There are two test points, each fitted with a coloured strap and captive cap.
• Upstream (HP) – Red
• Downstream (LP) - Blue
For safety reasons, all manometer probe insertions must be carried out with the
system cold.
The measurements are taken by directly inserting the test probe into the test point.
A silicone oil or grease should be lightly applied to the shaft of the probe prior to
insertion. No other type of lubricant should be used.
Valve Setting
When the regulated position is achieved, the double regulating feature is set as
follows:
• The inner spindle is adjusted through the central hole in the handwheel, using
a 3mm Allen key.
• Rotate the inner spindle anti-clockwise until a stop is felt.
• The double regulating feature is now set which enables the valve to be fullyclosed
for isolation and re-opened to the previously set position. It is recommended to record
this set position for reference later if necessary.
Maintenance
The Albion Art 22 does not require any routine maintenance.
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