Technical Specifications

8 | GE Oil & Gas
Temperature/Seat Leakage
Standard Metal Seal Ring Temperature Limitations
A strain hardened 316 stainless steel seal ring is an available
option when the MN-7 Seal is not suitable. Seat leakage is per
ANSI /FCI 70.2 Class IV. The metal seal ring can be used with
either MN-7 lined bearings or the optional solid metal bearings.
The fluid temperature is limited to 425°F (218°C) when using the
MN-7 lined. A high temperature package consisting of metal seal
ring, bearings and flexible graphite packing
elevates fluid temperature limitations to 600°F (316°C)
maximum or ANSI working pressure and temperature
limitations. For use in lubricated service only.
MN-7 Seal Ring Temperature Limitations
The standard MN-7 seal ring provides tight, ANSI/FCI 70.2
Class VI seat leakage. Pressure and temperature ratings of this
design are limited as shown in the chart below as well as those
shown in the corresponding pressure drop tables.
(Optional) Heavy Duty Metal Seal Ring (Bi-directional Flow)
A solid Heavy Duty Metal seat ring is available (NPS 1-6) when
the MN-7 or Standard Metal Seal ring is not suitable. The Heavy
Duty Seat ring must be used with solid metal bearings. Fluid
temperature is limited to 500°F (260°C) due to the material of
the radial seal. Seat leakage is per ANSI/FCI 70.2 Class IV.
100 200 300 400 500 600 700 800
(6.89) (13.79) (20.68) (27.58) (34.47) (41.37) (48.26) (55.16)
400
300
200
100
0
-50
200
150
100
50
0
-45
Temperature °F
Temperature °F Temperature °C
Pressure Drop psi (bar)
1 Zone of maximum temperature limits
2 Zone of maximum pressure limits
3 Zone of maximum interactive pressure/temperature limits
1
1
3
2
2
3