Cla-Val 100-03 - Manual

Note: For optimum operation of built-in check feature, installation with stem vertically up is recommended.
Four - Way Control
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Four - Way Control
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Four - Way Control
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Powercheck Valve
100-03
DESCRIPTION
This manual contains information for installation, operation and main-
tenance of the Cla-Val 100-03 Powercheck, an automatic valve
designed for use where independent operating pressure is desired,or
when line fluid is unsuitable as an operating medium.
This valve is a hydraulically operated, diaphragm type, globe or angle
pattern valve. It is single seated and incorporates into its design two
operating chambers sealed from one another by a flexible synthetic
rubber diaphragm. Pressure applied to the upper chamber closes the
valve; when applied to the lower chamber, it opens the valve.
With proper pilot controls, the valve can be held in any intermediate
position between fully open and tightly closed unless a static condition
or pressure reversal occurs, in which case the valve closes to prevent
return flow regardless of the diaphragm position.
INSTALLATION
Allow sufficient room around the valve assembly to make adjustments
and for disassembly.
NOTE: BEFORE THE VALVE IS INSTALLED, PIPE LINES SHOULD
BE FLUSHED OF ALL CHIPS, SCALE AND FOREIGN MATTER.
It is recommended that gate or block valves be installed on both the
upstream and downstream sides of the 100-03 to facilitate isolating
the valve for preventative maintenance.
Place the valve in the line with flow through the valve in the direction
indicated on the inlet name plate or by flow arrows and with the cover
"UP" Other positions are not acceptable due to the check feature.
When a pilot control system is installed on the Powercheck Valve, use
care to prevent damage. If it is necessary to remove fittings or com-
ponents, be sure they are kept clean and replaced in the exact order
of removal.
After the valve is installed and the system is first pressurized, vent air
from the cover chamber and tubing by loosening fittings at all high
points.
TROUBLE SHOOTING
The following trouble shooting information deals strictly with
the Powercheck Valve; however some "possible causes" will
refer to components that may exist in the variety of control
systems available for the valve. All trouble shooting is possi-
ble without removing the valve from the line.
SERVICE SUGGESTIONS
(Service Suggestions Chart)
CAUTION: Extreme care should be taken when servicing the
valve. Gate or line block valves must be closed upstream and
downstream of the valve before starting disassembly. When
there are no block or gate valves to isolate the Powercheck
Valve it should be realized that the valve cannot be serviced
under pressure. Steps must be taken to remedy this situation
before proceeding.
Check Action
When a static condition or pressure rever-
sal occurs, the split stem design allows the
valve to instantly check closed. Return flow
is prevented regardless of the diaphragm's
position.
Principle of Operation
Tight Closing Operation
When pressure below the diaphragm is
relieved and operating pressure is
applied to the cover chamber, the valve
closes drip-tight.
Full Open Operation
When operating pressure below the
diaphragm is applied and pressure is
relieved from the cover chamber, the
valve is held open allowing full flow.
MODEL
INSTALLATION / OPERATION / MAINTENANCE