Equalizing Check Valve Choke
The Parvenu Model \'FB-2\' and \'RB-2\' Equalizing Check Valves are complete equipment units, without any locking device. They are utilized in the following Tubing Mounted Equipment:
\'FB-2\'
run in all Model \'F\' Nipples and all Model \'L\' Sliding Sleeves.
\'RB-2\'
run in Bottom No-Go \'R\' Nipples.
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