Flowserve Mark 3 Sealed Metallic Durco - Manual (Page 14)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 01-13
Page 14 of 72 flowserve.com
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