Piston ring typologies and codes
|
COMPRESSION RINGS
|
|||
 AC Plain compression ring |
 AC...CR / MO / PVD / TF Plain, coated periphery, compression ring |
 AC IF Plain, internal bevel-top side compression ring |
|
 AC IF...CR / MO / PVD / TF Internal bevel-top side, coated periphery compression ring |
 AC IW Plain, internal step-top side compression ring |
 AC IW...CR / MO / PVD / TF Internal step-top side, coated periphery compression ring |
|
 AC CO Taper faced compression ring |
 AC CO...CR / MO / PVD / TF Taper faced, coated periphery compression ring |
 AC CO IF Taper faced, internal bevel-top side compression ring |
|
 AC CO IF...CR / MO / PVD / TF Taper faced, internal bevel-top side, coated periphery compression ring |
 AC CO IF U Taper faced, internal bevel-bottom side compression ring |
 AC CO IF U...CR / MO / PVD / TF Taper faced, internal bevel-bottom side, coated periphery compression ring |
|
 AC CO IW Taper faced, internal step-top side compression ring |
 AC CO IW...CR / MO / PVD / TF Taper faced, internal step-top side, coated periphery compression ring |
 AC CO IW U Taper faced, internal step-bottom side compression ring |
|
 AC CO IW U...CR / MO / PVD / TF Taper faced, internal step-bottom side, coated periphery compression ring |
 AC TRAP Keystone compression ring |
 AC TRAP...CR / MO / PVD / TF Keystone, coated periphery compression ring |
|
 AC TRAP IF Keystone, internal bevel-top side compression ring |
 AC TRAP IF...CR / MO / PVD / TF Keystone, internal bevel-top side, coated periphery compression ring |
 AC TRAP IW Keystone, internal step-top side, compression ring |
|
 AC TRAP IW...CR / MO / PVD / TF Keystone, internal step-top side, coated periphery compression ring |
 AC TRAP CO Keystone, taper faced, compression ring |
 AC TRAP CO...CR / MO / PVD / TF Taper faced, keystone, coated periphery compression ring |
|
 AC TRAP CO IW U Taper faced, keystone, internal step-bottom side compression ring |
 AC TRAP CO IW...CR / MO / PVD / TF Taper faced, keystone, internal step-top side coated periphery compression ring |
 AC S TRAP Half-keystone compression ring |
|
 AC S TRAP...CR / MO / PVD / TF Half-keystone, coated periphery compression ring |
 AC S TRAP IF U Half-keystone, internal bevel-bottom side compression ring |
 AC S TRAP IF U...CR / MO / PVD / TF Half-keystone, internal bevel-bottom side, coated periphery compression ring |
|
 AC GN Upper side dowel pin joint, plain compression ring |
 AC TO Angle joint, plain compression ring |
||
|
SCRAPER RINGS
|
|||
 ROS Napier, scraper ring |
 ROS IF Napier, internal bevel-top side scraper ring |
 ROS CO Napier, taper faced scraper ring |
|
 ROS CO...CR / MO / PVD / TF Napier, taper faced, coated periphery scraper ring |
 ROS CO IW...CR / MO / PVD / TF Napier, taper faced, internal step-top side, coated periphery scraper ring |
 ROS CO IW U Napier, taper faced, internal step-bottom side, scraper ring |
|
|
OIL CONTROL RINGS
|
|||
 ROF Slotted oil control ring |
 ROF SMC Slotted, bevel-edged oil control ring |
 ROF SMC...CR / MO / PVD / TF Slotted, bevel-edged, coated, oil control ring |
|
 ROF SMP Slotted, double bevel-edged oil control ring |
 ROF SPR Slotted, spring loaded oil control ring |
 ROF SPR SMC Slotted, bevel-edged , spring loaded oil control ring |
|
 ROF SPR SMC...CR / MO / PVD / TF Slotted, bevel-edged, coated, spring loaded oil control ring |
 ROF SPR SMP Slotted, double bevel-edged, spring loaded oil control ring |
 ROF NIFFLEX 3 pieces steel oil control ring |
|
 ROF NIFFLEX...CR / MO / PVD / TF 3 pieces steel, coated periphery oil control ring |
|||