MERKEL U-RINGS MADE OF PTFE

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1 U-Rings Merkel U-Rings made of PTFE 1 MERKEL U-RING MADE OF PTFE MATERIAL The mechanical properties such as pressure resistance and resistance abrasion, thermal expansion etc. can be improved for specific applications through the addition of fillers. Merkel U-Rings made of PTFE PRODUT DERIPTION yone-sided with pressure applied seal ymetal spring is used as pre-load component for the sealing lips yystem pressure overrides the pre-load during operation. PRODUT ADVANTAGE ymall housing yuitable for high pressures and vacuum yuitable for stroke, rotary, pivoting movements and for static applications yuniversal chemical resistance ylarge temperature range ygood dry running properties ylow friction forces yfree of stick-slip yresistant ageing ypermanently elastic due metal spring. APPLIATION Fittings manufacture, general chemistry, mechanical engineering, foodstuffs industry, pharmaceuticals, petrochemicals. ye.g. ball cocks, flanges/covers, rotary joints and manifolds, hot water and steam valves, valve journals, control shafts, reciprocating pumps, bearings. The most important materials are: yptfe/carbon yptfe/carbon fibre yptfe/ glass/mo 2 yptfe/ekonol yptfe/aramide yu MW PE s: (AII 301), , elgiloy. OPERATING ONDITION Material PTFE Pressure p* in MPa dynamic <45, static <120 Temperature range in liding speed v in m/s reciprocating <10, rotating <2,5 * From 25 MPa the usage of back-up rings can be necessary (depending on gap width, temperature, pressure, material). Also gaps caused by the expansion of the components can make the usage of back-up rings necessary. Please consult our advisory service. urface quality ealing surfaces, dynamic/static: Fig. 2 Lead-in chamfers: R a <1,6 µm Groove flanks: R a <2,5 µm Mean roughness R a of the sealing surface R max ạ 1,5 1,0 0,5 0,1 ydrogen team Air Engine oils AE Water Grease itumen Dust Granulate tatic Dynamic Gaseous Liquid olid ombined state of the medium Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog urface recommendation for sealing surfaces.

2 2 U-Rings Merkel U-Rings made of PTFE FITTING & INTALLATION Nutlänge L U-RING NRVI (TYPE 9492 WIT V-APED PRING) Einführungsschrägen sauber gerundet Nutgrund L +0, 5 1 D d Lauffläche Druckrichtung Wirkrichtung Nutflanke D 8 d D9 /2 d f7 Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog Terms for the housings Installation preferably in axially accessible grooves. yif it is necessary clip or snap, e.g., in half open housings, please consult us yprovide lead-in chamfers on rods and housings yavoid sharp edges ythe housings must be clean and free of foreign bodies. This sizing recommendation is an addition the article list. It is only used if the article list does not contain a suitable size. dimension range d L > ,25 3,10 3,60 >1,0 > ,10 4,30 4,80 >1,2 > ,70 6,50 7,10 >1,5 > ,10 8,50 9,50 >2,0

3 U-Rings Merkel U-Rings made of PTFE 3 U-RING NRVA (TYPE 9490 WIT V-APED PRING) U-RING NRVFA (TYPE 9494 WIT V-APED PRING EXTERNAL PREURE) L +0, 5 /2 L/2 L +0, 1 D 8 d h8 R max. 0, 3 D d9 D , 5 This sizing recommendation is an addition the article list. It is only used if the article list does not contain a suitable size. dimension range d L > ,25 3,10 3,60 1,0 > ,10 4,30 4,80 1,2 > ,70 6,50 7,10 1,5 > ,10 8,50 9,50 2,0 dimension range d L ,1 2,25 3, ,3 3,10 4, ,5 4,70 7, ,5 6,10 9,5 Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog

4 4 U-Rings Merkel U-Rings made of PTFE U-RING NRVFI (TYPE 9493 WIT V-APED PRING INTERNAL PREURE) U-RING NRVR (TYPE 9489 WIT V-APED PRING) L 3 d h10 +0, 5 L +0, 1 D 4 D 8 d F7 d F7 L2 +0, 5 Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog dimension range d L ,1 2,25 3, ,3 3,10 4, ,5 4,70 7, ,5 6,10 9,5 dimension range d D4 L2 L3 0, ,50 3,1 d+9,0+0,15 3,6 0,85 1,0 > ,50 4,3 d+12,5+0,2 4,8 1,35 1,2 > ,25 6,5 d+17,5+0,3 1,8 7,80 1,5

5 U-Rings Merkel U-Rings made of PTFE 5 U-RING NRUFI (TYPE 9487 WIT U-APED PRING INTERNAL PREURE) U-RING NRUFA (TYPE 9486 WIT U-APED PRING EXTERNAL PREURE) L/2 1 D 10 +0,5 D 10 min dimension range d ,5 10,0 13,0 +0, ,5 12,0 15,0 +0, ,0 14,0 18,0 +1, ,0 17,5 21,0 +1,0 * Use of medium heights are be used as a matter of preference. L* dimension range d ,5 10,0 13,0 +0, ,5 12,0 15,0 +0, ,0 14,0 18,0 +1, ,0 17,5 21,0 +1,0 * Use of medium heights are be used as a matter of preference. L* Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog

6 6 U-Rings Merkel U-Rings made of PTFE U-RING NRUFI (TYPE 9499 WIT LOED U-APED PRING INTERNAL PREURE) U-RING NRRI (TYPE 9442 WIT ROUND PRING) PTFE carbon/ptfe glass/mo (AII 301) L +0, 5 1 Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog dimension range d D ,5 10,0 13,0 +0, ,5 12,0 15,0 +0, ,0 14,0 18,0 +1, ,0 17,5 21,0 +1,0 * Use of medium heights are be used as a matter of preference. min L* D 8 d h11 This sizing recommendation is an addition the article list. It is only used if the article list does not contain a suitable size. dimension range d L /2 d f ,0* 4,2 4,7 > ,0* 5,0 5,5 > ,0* 7,5 8,0 > ,0 8,0 8,5 > ,5 11,0 11,5 > ,0 15,0 15,5 > ,5 18,0 18,5 > ,0 22,5 23,0 > ,0 30,0 30,5 >6 * for a profile dimension 5 mm one sealing edge

7 U-Rings Merkel U-Rings made of PTFE 7 U-RING NRRA (TYPE 9474 WIT ROUND PRING) PTFE carbon/ptfe glass/mo (AII 301) U-RING NRRFI (TYPE 9459 WIT ROUND PRING INTERNAL PRE- URE) L +0, 5 1 L/2 D 8 d h11 /2 d f7 1 +0, 5 D 10 This sizing recommendation is an addition the article list. It is only used if the article list does not contain a suitable size. dimension range d L ,0* 4,2 4,7 > ,0* 5,0 5,5 > ,0* 7,5 8,0 > ,0 8,0 8,5 > ,5 11,0 11,5 > ,0 15,0 15,5 > ,5 18,0 18,5 > ,0 22,5 23,0 > ,0 30,0 30,5 >6 * for a profile dimension 5 mm one sealing edge dimension range d L ,2 3,0 4, ,0 4,0 5, ,5 5,0 8, ,0 6,0 8, ,0 7,5 11, ,0 10,0 15, ,0 12,5 18, ,5 15,0 23, ,0 20,0 30,5 Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog

8 8 U-Rings Merkel U-Rings made of PTFE U-RING NRRFA (TYPE 9485 WIT ROUND PRING EXTERNAL PREURE) d h10 +0, 5 dimension range d L Freudenberg ealing Technologies Gmb & o. KG pecial ealing Products eatalog ,2 3,0 4, ,0 4,0 5, ,5 5,0 8, ,0 6,0 8, ,0 7,5 11, ,0 10,0 15, ,0 12,5 18, ,5 15,0 23, ,0 20,0 30,5

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