Hercules HP Flapperball Stuffing Box

The Hercules HP Flapperball stuffing box compensates for slight misalignment of the polished rod.

Our patent-pending design replaces the conventional spring-loaded flapper system with a specifically engineered floating ball, which can be easily inspected or replaced on the well. Our threaded Hercules™ HP Flapperballstuffing box weighs in at only 66 lb (threaded) and is designed from the ground up for safety and ease of operation.

Easily self-aligned
16-in. overall height
Upper 2¼-in. OD packing/lower cone packing
Various sizes and pressure ratings available
Easy-to-replace packing
Center housing doubles as lubrication chamber
Offset packing compatible

Hercules HP Flapperball Stuffing Box Specifications

Specifications	Simple Pac	Flapperball (threaded)	Flapperball (flanged)
Working pressure	1,500 psi	1,500, 3,000, 5,000 psi	1,500, 3,000, 5,000 psi
Bottom thread	2⅞-in. EUE male	2⅜, 2⅞, 3½ in.	2⅜, 2⅞, 3½ in.
Bottom connection	Male	Male or flanged	Male or flanged
Weight	60 lb	61 lb	94 lb
Height	16 in.	16 in.	16 in.
Material	Forged steel	Forged steel	Forged steel
Split cone packing – rod sizes	1⅛, 1¼, 1½ in.	1⅛, 1¼, 1½ in.	1⅛, 1¼, 1½ in.

Hercules HP Flapperball Stuffing Box Pieces Required

Pieces required	Simple Pac	Flapperball (threaded)	Flapperball (flanged)
Top donut packing	4	4	4
Bottom cone packing	N/A	2	2
V-ring packing OD	2¼ in.	2¼ in.	2¼ in.
V-ring stack height	3 in.	3 in.	3 in.

Hercules HP Flapperball Stuffing Box Flyer
Production Service Hookup Brochure

Render of threaded Hercules HP Flapperball Stuffing Box