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3.0 FLANGE BOLT TIGHTENING:
125 psi/150 psi
Cast Iron
Valve Size
Bolt
No.
Size
2
⁄
4
⁄
1
5
2
8
3
4
⁄
5
8
4
8
⁄
5
8
5
8
⁄
3
4
6
8
⁄
3
4
Table 1
3.1 Tighten nuts evenly, following bolting instructions (Fig.1)
so that the flange faces remain parallel. Flange bolts
should be tightened to 70 ft./lbs. Torque minimum to
assure firm metal-to-metal contact. When raised face
flanges are used, there will be a gap between the faces of
the outer diameter.
4.0 PRESSURE TEMPERATURE LIMITS:
5.0 FIELD CONVERSION
(Straight to Angle pattern valve):
5.1 Open valve at least one complete turn.
5.2 Remove the body bolts from valve body using Allen Key.
5.3 Rotate one half of the valve body 180˚ making sure the
lower valve seat and "O" Ring stay in position. Inspect the
"O" Ring for any cuts or nicks and replace if necessary.
5.4 Replace body bolts and torque evenly to 70 ft./lbs.
6.0 FLOW MEASUREMENT:
6.1 Where approximate indication of flow is acceptable the
Aurora Triple Duty valve can be used.
6.2 FLOW MEASUREMENT VALVE IN WIDE OPEN
POSITION.
6.22 Measure and record the differential pressure across the
valve using an Aurora CompuFlo with high pressure range
transducer, or CBDM-135/60 meter, or pressure gauges
with PMP adapters.
Recommended Bolt
Tightening Procedure
Fig. 1
3
CAUTION
Safety glasses should be used and the probe should not
be left inserted into fittings for prolonged periods of time
(overnight, etc), as leakage from the PMP may occur
when probe is removed.
6.23 Refer to Triple Duty Performance Curves with valve in
full open position (Fig 2).
Locate Pressure Differential on left hand side of chart and
extend line horizontally across to valve size being used.
Drop line vertically down and read flow rate from bottom
of chart.
6.3 DETERMINING FLOW RATE WITH VALVE IN
THROTTLED POSITION.
Triple Duty Performance Curve
with Valve in Full Position
Fig. 2
Fig. 3
6.3.1 Record the size of the valve and stem position using the
Flow Indicator Scale (page 5). Calculate percentage of
valve opening referring to table below:
Valve
2
⁄
3
1
2
Size
No. of Rings
5
5
(valve full open)
6.3.2 Measure and record the differential pressure across the
valve in the throttled position.
6.3.3 Locate percentage of valve opening on the bottom scale of
Flow Characteristic Curve (Fig 3). Project line vertically
up to intersect with the Valve Characteristic Curve and
from this point project line horizontally across to the left
of the chart and record the percentage of maximum flow
rate.
SECTION 2 ITEM 1040
DATED NOVEMBER 2012
SUPERCEDES MAY 2010
Inherent Flow
Characteristic Curve
with Valve in
Throttled Position
4
5
6
8
10
12
6
9
10
12
18
28
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