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1.1 INSTALLATION RECOMMANDATION
Example of typical installation:
UPSTREAM Isola-
tion Valve
Before valve is installed, pipe lines should be flushed of all chips, scale and foreign matter.
CLA-VAL 90-01 regulating valve operates with maximum efficiency when mounted in horizontal piping with the cover UP.
Isolation valves (upstream and downstream) should be provided for securing an easy maintenance operation, as well as a
H-strainer together with a dismantling joint. According to the strategic situation of the regulating valve, a system bypass may
be recommended.
1.2 COMMISSIONNING PROCEDURE
2B
2A
2C
Installation - Commissioning - Light Maintenance
CLA-VAL 90-01
H-Strainer
AQUA 90-501
Pressurizing & closing the regulating CLA-VAL 90-01 valve:
•
Upstream isolation valve and downstream isolation valve closed.
- Close isolation ball valve (2C).
- Open completely one-way flow control CV.
- UNSCREW completely the adjusting CRD screw until it can be
- Open slowly and partially the upstream isolation valve for pres-
•
The regulating valve CLA-VAL 90-01 must close.
- Open then completely the upstream isolation valve.
The regulating valve CLA-VAL 90-01 is pressurized and closed.
Venting of main valve and pilot circuit:
•
Upstream isolation valve open-Downstream isolation valve closed.
- Vent thoroughly the main valve cover chamber using the cover
- Vent all high point piping fittings by loosing the corresponding
The regulating valve CLA-VAL 90-01 is properly vented and closed.
DOWNSTREAM
Isolation Valve
Dismantling
Joint
handled manually (if factory preset, the screw setting must not
be modified).
surizing the regulating valve:
top or the valve position indicator venting plug.
fitting nut, then lock it tightly again.
47
Serie 578
Air release &
Vacuum Break
Valve AQUA
70-506
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