piston rings and rider bands
TRANSCRIPT
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7/30/2019 Piston Rings and Rider Bands
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From The Wellhead Through The PipelineHanover People Perform.
Piston Rings
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From The Wellhead Through The PipelineHanover People Perform.
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Checking end gapBe sure to
position rings in
the cylinder bore
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From The Wellhead Through The PipelineHanover People Perform.
Checking end gap
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From The Wellhead Through The PipelineHanover People Perform.
Checking end gap
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7/30/2019 Piston Rings and Rider Bands
7/20
From The Wellhead Through The PipelineHanover People Perform.
Checking end gap
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Metallic piston ring materials
CAST IRON*Dirty or corrosive gases
BRONZE
*High pressure
*High temperature*Non-corrosive
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Non-metallic piston
ring materials
TEFLON*Carbon filled - Non-lube and lubricated
*Glass and Moly filled - Lubricated*Bronze filled - Non-lube and lubricated
(mostly air service) High temperature, non-corrosive
THERMOPLASTICS - (Lubricated)*Combination rings
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From The Wellhead Through The PipelineHanover People Perform.
Piston with conventional rings
Piston
Cylinder bore Counterbore
Seal
Seal
= gas pressure
Piston movement
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From The Wellhead Through The PipelineHanover People Perform.
Rider ringsand
Rider bands
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Using rider rings or rider bands
and rings
to support the piston off of the
bore
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Typical application for rider rings
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Typical application for rider bands
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From The Wellhead Through The PipelineHanover People Perform.
Piston with combination rings
Piston
Cylinder bore Counterbore
Seal
Seal
Piston weight makes
bottom half of the ring
seal against cylinder bore.
= gas pressure
Piston movement
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From The Wellhead Through The PipelineHanover People Perform.
120o
Effective length of rider =
.866 x cylinder diameter
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RING TYPES
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Questions ?