Owner and operator manual Section 4: Orifice plate installation and removal instructions
3-9008-001 Rev M January 2015
“Extended time” procedure 73
In preparation for the plate removal and installation process, the operator must evaluate the
meter system to determine the amount of time between the Top (14) fluid evacuation and the
plate change to the full replacement of the Clamping Bar (12 or 12HP), the Sealing Bar (9 or
9HP), and the Sealing Bar Gasket (9A, 9A-HP or 9CF) back on the Top (14).
If the operator determines that the time between the Top (14) fluid evacuation and plate
change to the full replacement of the Clamping Bar (12 or 12HP), the Sealing Bar (9 or 9HP), and
the Sealing Bar Gasket (9A, 9A-HP or 9CF) back on the Top (14) is less than 15 minutes, then the
operator may use the “QUICK CHANGE” procedure.
If the operator determines that the time between the Top (14) fluid evacuation and the plate
change to the full replacement of the Clamping Bar (12 or 12HP), the Sealing Bar (9 or 9HP), and
the Sealing Bar Gasket (9A, 9A-HP or 9CF) back on the Top (14) is greater than 15 minutes, then
the operator must use the “EXTENDED TIME” procedure.
If, for any reason, the operator cannot determine the total time between the Top (14) fluid
evacuation and the plate change to the full replacement of the Clamping Bar (12 or 12HP), the
Sealing Bar (9 or 9HP), and the Sealing Bar Gasket (9A, 9A-HP or 9CF) back on the Top (14), then
the operator must use the “EXTENDED TIME” procedure.
The following are the conditions required to start the removal procedure of the orifice plate:
• The Senior is operating at line pressure
• The Plate Carrier (8DM or 8DMC) is located in the measurement position within the
Body (4)
• The Indicator Pointer (5B) and the Indicator Plate (5A) are installed on the Senior.
• The Slide Valve Shaft (5) is in the CLOSED position
• The Equalizer Valve (1) is in the CLOSED position
• The Bleeder Valve (10B) is in the CLOSED position
• The Sealing Bar Gasket (9A, 9A-HP or 9CF), the Sealing Bar (9 or 9HP), and the Clamping
Bar (12 or 12HP) are fastened to the Top (14)
• Process temperature and ambient temperature values are within range of grease charts
• Process pressure values are within the range of grease charts.
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