The function of the copper ring in the packing of piston compressors
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This post was last edited by longyuhuagong on 2016-11-19 09:43. The packing for the carbon dioxide compressors in our factory comes in three-leaf and six-leaf PTFE versions, along with a copper ring (some units use a single unitary piece while others have three separate parts; this confusion arises from inconsistent procurement of accessories). Our installation method is to use PTFE at the bottom of the packing box (towards the top dead center), while for the six-petal type, it is placed below the three-petal type. Copper is at the upper part (towards the bottom dead center). I want to ask what the function of the copper ring is ? ? ? Is our way of doing it correct? What’s the proper term for it? Thank you.
I think it should be installed this way: first put three-petal PTFE in the packing box, then six-petal PTFE, and finally the copper ring. If a stuffing box can only hold two pieces, install three petals first, then six petals.
You can search on the forum for the fourth floor section titled 【What is the name and function of the packing ring in reciprocating compressors】
We first install the six-petal ones, and then the three-petal ones
The copper ring should serve a pressure-relief function and should be placed first (in the direction of top dead center)
We first install the six-petal ones, and then the three-petal ones
(Cylinder side) Throttle ring – radial ring – tangential ring – flow-blocking ring (copper ring); during installation, the radial ring must be placed on the high-pressure side