DRESSER 022 Mode D'emploi page 8

INSTALLATION
• Check that the maximum inlet pressure is not higher than
the design pressure of the safety shut-off valve .
• The product should be lifted only with belts around the
body or on the lifting eye .
• Arrange enough room for the serving of the SSV .
Before installing the safety shut-off valve in the station, the
following must be checked:
• The upstream and downstream flanges must be parallel
so as to install the SSV without undue stress .
• The upstream piping must be cleaned from all impurities
(sand, welding slag, etc . )
• The safety shut-off valve must not be visibly damaged .
• The inlet and outlet chambers of the SSV must be
perfectly clean .
• Make sure that the direction of gas flow corresponds to
the arrow on the pressure SSV-body .
INSTALLATION POSITION
• DN 100: in horizontal installation only, with measuring
unit pointing upwards .
SAFETY SHUT-OFF VALVE TYPE 022
START UP
p -pulse
d
8
SENSING LINE
• The sensing line must be connected to a section
reasonably free from turbulences, preferably in a straight
section of the downstream piping (approx . 5D) .
• Connection: G¼" EO-12
• Recommended pipe: Ermeto-pipe EO-12, Steel, zinc
protected
BREATHING LINE
Unnecessary!
The SSV closing cap (Pos . - No . 1 ) is equipped with a safety-
diaphragm .
START UP- INSTRUCTIONS
After installation the SSV on the gas station be sure , that the
upstream- and downstream valves are closed;
• Open the upstream valve slowly and complete;
• Reset the shut-off valve slowly and check that the
downstream pressure stop at the closing pressure (see
also page 13) .
SSV-SET POINT
• The SSV is delivered according to the specifications,
specified in the purchase order .
• If the adjusted shut-off pressure is to be changed, proceed
as follows:
Increasing the shut-off pressure:
– The adjusting screw is to turn clockwise;
– Decreasing the shut-off pressure: The adjusting screw
is to turn anti-clockwise .
The sequence of start-up the SSV 022 is to be observed!
If the sequence is not considered, the
valve disc arm contacts the inside of valve
body and the chamfered edge of valve
disc arm (3) can be deformed!
a) Pressure compensation by opening the manipulation
valve slowly .
b) Unscrew cap (8) of shut-off valve and pull the valve
stem (2) by aid on the cap (8), to open the SSV (only
possible if pd smaller than OPSO and higher than
UPSO) .
c) Hold the valve stem for some seconds (it's necessary,
that diaphragm and lever system can
be locked into operating position) .
d) Unscrew cap of reset shaft on valve body . Turn the
reset shaft (6) in direction of arrow*) until valve
disc arm (3) engages into latch lever .
e) Close the manipulation valve .
f) Screw on cap of reset shaft and valve stem .
* For turning reset shaft (6), the maximum torque value is 5 Nm to engage
valve disc arm
(3) into latch lever .