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Compressor componentsPISTON RINGS and GUIDE BEARINGS

Application field

of piston rings

and guide bearings

Dry compressors

Reduced lubrication

compressors

Refrigeration units

Expansion units

Pumps for the chemical

industry

Pumps for liquefied

gases at low temperature

In order to guarantee best performances to the compressors, piston rings and bearing guides made up of

various PTFE compounds are largely used, replacing traditional materials like cast iron, graphite and stratified

structured materials. Pure PTFE chemical inertness makes this material suitable for all the applications where

high chemical resistance is required in presence of almost technical gases and fluids. Exemptions exist inpresence of alkaline metals in the molten state, fluorides and fluoridric acid in the gaseous state, and

some fluorocarbons at high temperatures and pressures. PTFE piston rings and guide bearings can be used

at temperatures up to 260C, depending on the system pressure and piston speed this temperature limit

value should be lowered. In order to improve wear resistance and to rise the working temperature limit

DuPontTMVespelSP21 is also used to manufacture floating rings, piston rings and guide bearings. Fluorten

manufactures also components in natural and filled VICTREXPEEKTM for inlet and outlet valves.

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Property* Standard Units

Typical values

PTFE

C-657

PTFE

BM-40111

PTFE

VGM-70411

PEEK

NAT.

PEEK

V-706

PEEK

CF-706

DuPont TM

Vespel

SP21

Density ASTM D 792 g/cm 3 2,10 3,80 2,27 1,30 1,54 1,40 1,42

Tensile strenght ASTM D 4894 Mpa 14 18 18 **100 **150 **200 **62

Elongation ASTM D 4894 % 50 140 150 **30 **2 **1,5 **5,5

Hardness ASTM D 676 Shore D 67 67 64 *99 *103 *107 80

aximum operating

temperature/ C +250 +250 +250 +240 +240 +240 +300

FE and TECHNOPOLYMERS special formulations available on demand. For any further infotmation please contact our technical office

ckwell Hardness scale M in compliance with Standard ASTM D785

ltimate tensile strenght and Ultimate elongation in compliance with Standard ISO 527

24060 CASTELLI CALEPIO (BG) Italy Via Cercone, 34 Tel. +39 035 4425115 Fax +39 035 848496

fluorten@fluorten.com www.fluorten.com

ince 1966 FLUORTEN is an industrial production leader in design, extrusion, moulding and machining, able to supply semi-finished and finished products in PTFE and injection

oulded technopolymers. The production cycle and Quality of FLUORTENmatch company philosophy to work with each Customer to solve project design and production

roblems to obtain a competitive product.

Compressors components

PISTON RINGS and GUIDE BEARINGS

piston rod

piston ringGuide bearing

oil scraperfloating rings

valve-(inlet or outlet)

and Rulon Finished parts Sliper ringsand FLUOR-S/SC Tapes Spring energized seals Official Italy distributor ofDuPont TMVespel trademark

Technopolymers injection mouldingVICTREXPEEKTM/ PCTFE

Semifinished products

st data and information given here are the result of our considerable experience they are only intended as a guide line and Fluorten s.r.l. can accept no responsability either for the results

ined from this information or for situations in conflict with any existing patents.

PTFE and HPP ball valves

components