Flowserve Mark 3 Sealed Metallic Durco User Manual
Page 14
MARK 3 USER INSTRUCTIONS ENGLISH 71569102 01-13
Page 14 of 72
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3.4.2
Pressure-temperature ratings
The pressure–temperature (P-T) ratings for Mark 3
pumps are shown in figures 3-3 to 3-5. Determine
the appropriate casing “Material Group No.” in
Figure 3-2. Interpolation may be used to find the
pressure rating for a specific temperature.
Example:
The pressure temperature rating for an ANSI std.
GP2-10” pump with Class 300 flanges and CF8M
construction at an operating temperature of 149˚C
is found as follows:
a) The correct pressure-temperature chart is
Figure 3-5C.
b) From Figure 3-2, the correct material group for
CF8M is 2.2
c) From Figure 3-5C, the pressure-temperature
rating is 21.5 bar.
The maximum discharge pressure must be
less than or equal to the P-T rating. Discharge
pressure may be approximated by adding the
suction pressure and the differential head
developed by the pump.
Figure 3-3 12x10-18HD Only
Material Group No.
Temp
˚C
1.0
1.1
2.1
2.2
2.8
3.2
3.4
3.5
3.7
3.8
3.17
Ti
Cr
bar
-73
13.8
13.8
13.8
9.7
13.8
13.8
13.8
13.8
13.8
13.8
-29
13.8
13.8
13.8
13.8
13.8
9.7
13.8
13.8
13.8
13.8
13.8
13.8
-18
13.8
13.8
13.8
13.8
13.8
9.7
13.8
13.8
13.8
13.8
13.8
13.8
12.6
38
13.8
13.8
13.8
13.8
13.8
9.7
13.8
13.8
13.8
13.8
13.8
13.8
12.6
93
13.8
13.8
13.8
13.8
13.8
9.7
13.8
13.8
13.8
13.8
13.8
13.8
12.6
149
13.8
13.8
13.8
13.8
13.8
9.7
13.1
12.4
13.8
13.8
12.4
13.8
12.6
171
13.8
13.8
13.7
13.8
13.8
9.7
13.0
12.1
13.8
13.8
11.9
13.8
12.6
204
13.8
13.8
13.1
13.4
13.8
9.7
12.8
11.7
13.8
13.8
11.0
13.8
260
11.7
11.7
11.7
11.7
11.7
9.7
11.7
11.0
11.7
11.7
10.3
11.7
Material Group No.
Temp
˚F
1.0
1.1
2.1
2.2
2.8
3.2
3.4
3.5
3.7
3.8
3.17
Ti
Cr
psi
-100
200
200
200
140
200
200
200
200
200
200
-20
200
200
200
200
200
140
200
200
200
200
200
200
0
200
200
200
200
200
140
200
200
200
200
200
200
183
100
200
200
200
200
200
140
200
200
200
200
200
200
183
200
200
200
200
200
200
140
200
200
200
200
200
200
183
300
200
200
200
200
200
140
190
180
200
200
180
200
183
340
200
200
199
200
200
140
188
176
200
200
172
200
183
400
200
200
190
195
200
140
185
170
200
200
160
200
500
170
170
170
170
170
140
170
160
170
170
150
170