Hercules® Stuffing Box Packing

A set of DOME® packing consists of three pieces of rubber packing, each or which has a split PTFE seal ring sandwiched inside.

DOME® Packing

• Rubber packing with unique PTFE seal ring to minimize contact between rubber and polished rod
• Automatically compensates for changes in flow line pressures
• Available one-time conversion kit retrofits most cone packed stuffing boxes
• Low coefficients of friction
• Lower drag
• Less heat generation
• Tight seal around polished rod

Split Cone Packing

Material	Max. % H2S	Max. Temperature
Soft™	2%	110° F
Hard™	2%	110° F
Compound S™	2%	160° F
Special Lubricated™	2%	110° F
Heavy Duty™	2%	110° F
PTFE Filled™	2%	110° F
Compound ST™	2%	160° F
Compound C™	2%	300° F
Compound D™	2%	300° F
Compound H™	5%	350° F
Compound G™	5%	250° F

Other Packing

Material	Stuffing Box	Max % H2S	Max. Temperature
Chevron NBR	PCSB and HTD	2%	250° F
Chevron HSN	PCSB and HTD	10%	325° F
Chevron HKM	PCSB and HTD	20%	400° F
Kevlar®/PTFE	HTD	20%	540° F

Literature

• Hercules® Stuffing Box Packing

Hercules Stuffing Boxes are offered in a variety of styles:

• Classic Stuffing Boxes
• Inverted Cone Stuffing Boxes
• High-Performance Stuffing Boxes
• Critical Service Stuffing Boxes

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