Skip to content

KASTAS K21 PISTON SEAL / ROD SEAL

    KASTAS PISTON – ROD SEALS K21

    K21 is a single acting piston – rod seal and designed to have symmetrical lips in order to be used both for rod and piston applications.

    PRODUCT ADVANTAGES
    · Superior static and dynamic sealing effect
    · Wide range of dimensions
    · Easy assembly into closed grooves
    · Simple groove design
    · Economical sealing solution

    APPLICATION
    Construction machinery, fork-lift trucks, injection moulding machines, agricultural machinery, loading platforms and standard cylinders.

    MATERIALCODE
    NBR90 SHORE ANB9001
    PU92 SHORE APU9201
    OPERATING CONDITIONS
    NBR
    MEDIAMineral oils
    (DIN 51524)
    HFA and
    HFB
    HFC
    TEMPERATURE -30°C
    +105°C
     +5°C
    +60°C
     -30°C
    +60°C
    PRESSURE≤150 Bar≤150 Bar≤150 Bar
    SPEED≤0.5 m/sec≤0.5 m/sec≤0.5 m/sec
    SURFACE ROUGHNESSRaRmax
    Sliding Surface ØD-Ød≤0.4 μm≤3.2 μm
    Groove Base ØDb-Ødp≤1.6 μm≤10 μm
    Groove Flanks B≤3.2 μm≤16 μm

    INSTALLATION
    Easily assembled into closed grooves according to the minimum diameter values that are given in the below table. Open grooves or special assembly tools should be used for the values that are outside this table. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the seal must be oiled with system oil.

    MINUMUM DIAMETER VALUES FOR CLOSED TYPE OF GROOVES
    (D-d)/2
    (mm)
    4567.71012.515
    dmin
    (mm)
    2530405080100105

    NOTES
    For special applications that require high temperatures, K21 can be produced in FKM. The permissible sealing gap values of K21 piston – rod seal is given in the below table.

    PERMISSIBLE SEALING GAP
    NBRSmax (mm)
    t=(D-d)/250 Bar100 Bar150 Bar
    t≤50.400.200.10
    t>50.450.250.15
    PUSmax (mm)
    t=(D-d)/2150 Bar250 Bar400 Bar
    t≤50.300.200.15
    t>50.350.250.20

    KASTAŞ NOd (f7)/dp (h11)Db (H11)/D (H11)bB (-0/+0.2)n
    K21-003/2383.542.5
    K21-003/4310673.5
    K21-003/5384.552.5
    K21-004410563
    K21-004/14125.56.54
    K21-004/241244.54
    K21-004/341044.53
    K21-004/447.533.52
    K21-004/54104.553
    K21-004/6410673
    K21-005511783
    K21-005/2511563
    K21-005/351044.52.5
    K21-005/4510562.5
    K21-005/5592.42.92
    K21-005/6512563.5
    K21-005/75144.554
    K21-005/851244.53.5
    K21-0066922.52
    K21-006/1612673
    K21-006/10614674
    K21-006/11620895.5
    K21-006/1261444.54
    K21-006/13616564.5
    K21-006/14612563
    K21-006/2612783
    K21-006/361033.52
    K21-006/4615564
    K21-006/5616674.5
    K21-006/661244.53
    K21-006/76.3512.76.357.353
    K21-006/8618895
    K21-006/96135.56.53.5
    K21-007715564
    K21-007/1714783.5
    K21-007/2712.53.543
    K21-007/3715784
    K21-007/47133.543
    K21-007/571244.52.5
    K21-007/67113.542
    K21-008818894.5
    K21-008/1814673
    K21-008/10815673.5
    K21-008/11820895
    K21-008/12817674
    K21-008/138155.26.23.5
    K21-008/148152.533.5
    K21-008/15815563.5
    K21-008/1681244.52
    K21-008/2816674
    K21-008/3816894
    K21-008/581444.53
    K21-008/7815893.5
    K21-008/8812562
    K21-008/9813782.5
    K21-009917674
    K21-009/1919674.5
    K21-009/291644.53.5
    K21-009/3916783.5
    K21-009/49175.56.54
    K21-0101020894.5
    K21-010/10101544.52.5
    K21-010/111016673
    K21-010/121016563
    K21-010/131020784.5
    K21-010/1410229105
    K21-010/1610143.542
    K21-010/1710206.57.54.5
    K21-010/181026896
    K21-010/191022675
    K21-010/21018894
    K21-010/20101844.54
    K21-010/3102810116
    K21-010/41018674
    K21-010/51022895
    K21-010/6101644.53
    K21-010/71025895.5
    K21-010/8102510115.5
    K21-010/910269.510.56
    K21-0121222894.5
    K21-012/11220894
    K21-012/10121833.53
    K21-012/111220564
    K21-012/121225895
    K21-012/141224675
    K21-012/15122810116
    K21-012/16121633.52
    K21-012/171222784.5
    K21-012/1812.725.46.357.355
    K21-012/21222674.5
    K21-012/20121733.52.5
    K21-012/2112206.87.84
    K21-012/2312261085
    K21-012/24123210116
    K21-012/251219.5784
    K21-012/31224785
    K21-012/4122410115
    K21-012/51218673
    K21-012/61222564.5
    K21-012/7121844.53
    K21-012/81218563
    K21-012/912205.56.54
    K21-013/11325895
    K21-0141424894.5
    K21-014/11422564
    K21-014/101432896
    K21-014/111422674
    K21-014/121428785.5
    K21-014/131424564.5
    K21-014/2142212134
    K21-014/31424674.5
    K21-014/4142810115.5
    K21-014/51422894
    K21-014/61420563
    K21-014/71420673
    K21-014/8142044.53
    K21-014/9142244.54
    K21-0151525894.5
    K21-015/1015213.543
    K21-015/111522563.5
    K21-015/12152810115
    K21-015/13153010115.5
    K21-015/1415.8725.44.765.264.5
    K21-015/151530895.5
    K21-015/161525674.5
    K21-015/1715225.56.53.5
    K21-015/181522893.5
    K21-015/21528895
    K21-015/41525564.5
    K21-015/5152244.53.5
    K21-015/61530675.5
    K21-015/7152033.52.5
    K21-015/8152510114.5
    K21-0161626894.5
    K21-016/11622563
    K21-016/101625564
    K21-016/131624674
    K21-016/14162210113
    K21-016/161628675
    K21-016/21626674.5
    K21-016/4163210116
    K21-016/5162444.54
    K21-016/6162233.53
    K21-016/71629675
    K21-016/81626564.5
    K21-016/9162244.53
    K21-017/1173210115.5
    K21-017/2172544.54
    K21-0181828894.5
    K21-018/11830675
    K21-018/101828674.5
    K21-018/111824893
    K21-018/12182644.54
    K21-018/218307.58.55
    K21-018/318308.59.55
    K21-018/4183010115
    K21-018/518255.56.53.5
    K21-018/61832785.5
    K21-018/71825563.5
    K21-018/8182444.53
    K21-018/91826564
    K21-019/31925673
    K21-019/419.523.914.815.812
    K21-019/6192744.54
    K21-0202030894.5
    K21-020/12028564
    K21-020/1020253.542.5
    K21-020/11203044.54.5
    K21-020/122026673
    K21-020/142027673.5
    K21-020/15203610116
    K21-020/16204012136
    K21-020/1720327.58.55
    K21-020/18203211125
    K21-020/19203512135.5
    K21-020/22030674.5
    K21-020/212028894
    K21-020/222032675
    K21-020/232028674
    K21-020/2420252.532.5
    K21-020/252030564.5
    K21-020/262027563.5
    K21-020/3203010114.5
    K21-020/4203510115.5
    K21-020/5204010116
    K21-020/62032565
    K21-020/72036896
    K21-020/8202844.54
    K21-020/9202533.52.5
    K21-0222232894.5
    K21-022/12232784.5
    K21-022/112230564
    K21-022/12223810116
    K21-022/13223210114.5
    K21-022/142232564.5
    K21-022/15223010114
    K21-022/17224612137
    K21-022/1822.430564
    K21-022/42234675
    K21-022/52230674
    K21-022/6224210116
    K21-022/7223410115
    K21-022/82232674.5
    K21-022/9224010116
    K21-0242434564.5
    K21-024/1243244.54
    K21-024/22440896
    K21-025254010115.5
    K21-025/11253344.54
    K21-025/122538785
    K21-025/1325.5314.553
    K21-025/14253810115
    K21-025/15255012137
    K21-025/16253244.53.5
    K21-025/172533784
    K21-025/18254011125.5
    K21-025/192535674.5
    K21-025/22533564
    K21-025/2025407.58.55.5
    K21-025/212547787
    K21-025/222532563.5
    K21-025/23253510114.5
    K21-025/2625366.97.95
    K21-025/2725389.510.55
    K21-025/32535564.5
    K21-025/42535784.5
    K21-025/52535894.5
    K21-025/62537785
    K21-025/725389105
    K21-025/8254510116
    K21-025/92532783.5
    K21-026/12642896
    K21-026/22635894
    K21-027273544.54
    K21-027/12738675
    K21-027/22736674
    K21-028284310115.5
    K21-028/1284010115
    K21-028/102838564.5
    K21-028/112832.833.52.5
    K21-028/1228488.59.56
    K21-028/13283644.54
    K21-028/142840675
    K21-028/2284810116
    K21-028/3284812136
    K21-028/42835673.5
    K21-028/52836674
    K21-028/62836564
    K21-028/72835.5564
    K21-028/8283810114.5
    K21-028/92844896
    K21-030304510115.5
    K21-030/1304010114.5
    K21-030/103037893.5
    K21-030/11303810114
    K21-030/12304710116
    K21-030/143038344
    K21-030/153040894.5
    K21-030/163036343
    K21-030/1730.1638.13.974.974
    K21-030/183037673.5
    K21-030/2304210115
    K21-030/3305010116
    K21-030/4305012136
    K21-030/53040564.5
    K21-030/63040784.5
    K21-030/7303844.54
    K21-030/830385.56.54
    K21-030/93040674.5
    K21-031/231.541.5674.5
    K21-032324710115.5
    K21-032/13240894
    K21-032/10325210116
    K21-032/113244675
    K21-032/123245895
    K21-032/13324810116
    K21-032/33242674.5
    K21-032/4324510115
    K21-032/5325012136
    K21-032/6324044.54
    K21-032/73240564
    K21-032/832446.357.355
    K21-032/932405.76.74
    K21-0333343674.5
    K21-0343444564.5
    K21-035355010115.5
    K21-035/2354510114.5
    K21-035/3355510116
    K21-035/4355512136
    K21-035/53543674
    K21-035/6355212136
    K21-035/73545674.5
    K21-035/83547675
    K21-035/935507.58.55.5
    K21-036365110115.5
    K21-036/136517.18.15.5
    K21-036/23650895.5
    K21-036/33646784.5
    K21-036/43648675
    K21-036/53646674.5
    K21-036/6364810115
    K21-036/73646564.5
    K21-03737455.56.54
    K21-0383852.59.510.55.5
    K21-038/1385510116
    K21-038/2385810116
    K21-038/33850675
    K21-038/4385010115
    K21-038/538.150.86.357.355
    K21-038/638.150.87.148.145
    K21-038/73845673.5
    K21-039/1395810116
    K21-040405510115.5
    K21-040/14050674.5
    K21-040/104050564.5
    K21-040/114050894.5
    K21-040/12406510117
    K21-040/134056896
    K21-040/14404811124
    K21-040/154055785.5
    K21-040/164052675
    K21-040/2405010114.5
    K21-040/3405212135
    K21-040/4406010116
    K21-040/5406012136
    K21-040/640509104.5
    K21-040/74050784.5
    K21-040/8405610116
    K21-040/9406515167
    K21-04141.2750.84.765.264
    K21-042/14250564
    K21-042/2426212136
    K21-042/34257895.5
    K21-042/44255895
    K21-042/54250894
    K21-042/6425111124
    K21-042/7425210114.5
    K21-042/84250674
    K21-043436310116
    K21-043/1436415167
    K21-04444579105
    K21-045456010115.5
    K21-045/1455510114.5
    K21-045/10456310116
    K21-045/11455810115
    K21-045/124556785
    K21-045/24557675
    K21-045/3456312136
    K21-045/4456510116
    K21-045/5456512136
    K21-045/6457012137
    K21-045/74555674.5
    K21-045/84553784
    K21-045/94553894
    K21-046467012137
    K21-046/14658675
    K21-047476512136
    K21-047/147.6263.511.512.56
    K21-047/24760895
    K21-048486312135.5
    K21-048/148609105
    K21-048/2486812136
    K21-048/348586.57.54.5
    K21-048/4486810116
    K21-048/54860675
    K21-048/6486310115.5
    K21-050506510115.5
    K21-050/1506010114.5
    K21-050/115060894.5
    K21-050/125058894
    K21-050/135060674.5
    K21-050/14506012134.5
    K21-050/155060784.5
    K21-050/16505710113.5
    K21-050/1750.863.59.5210.525
    K21-050/185063675
    K21-050/195062675
    K21-050/250629105
    K21-050/205060564.5
    K21-050/215060454.5
    K21-050/2350.860.34.765.764
    K21-050/35063895
    K21-050/450639105
    K21-050/5506512135.5
    K21-050/6506812136
    K21-050/75070896
    K21-050/8507010116
    K21-050/9507012136
    K21-052526212134.5
    K21-052/15262674.5
    K21-053/2536312134.5
    K21-053/353637.58.54.5
    K21-053/45364565
    K21-053/55363674.5
    K21-053/6536310114.5
    K21-0545470896
    K21-055557512136
    K21-055/1557010115.5
    K21-055/3557012135.5
    K21-055/4558015167
    K21-055/5556512134.5
    K21-055/6558012137
    K21-055/75565564.5
    K21-055/855707.58.55.5
    K21-055/95565674.5
    K21-056567612136
    K21-056/2568015167
    K21-056/3567110115.5
    K21-056/45666564.5
    K21-056/5567012135.5
    K21-056/65666674.5
    K21-05757.1569.8510115
    K21-057/157.1576.210116
    K21-058/15870675
    K21-058/2587812136
    K21-059598014157
    K21-060608012136
    K21-060/1608010116
    K21-060/2607012134.5
    K21-060/3608016176
    K21-060/4607512135.5
    K21-060/5607013144.5
    K21-060/66070674.5
    K21-060/76070784.5
    K21-060/8608012.513.56
    K21-061618012136
    K21-061/16171674.5
    K21-063638312136
    K21-063/163.582.5514.2515.256
    K21-063/26372674
    K21-063/3637510115
    K21-063/46378895.5
    K21-065658512136
    K21-065/1658012135.5
    K21-065/1065757.38.34.5
    K21-065/26590897
    K21-065/3659013147
    K21-065/4659015167
    K21-065/5657510114.5
    K21-065/66575674.5
    K21-065/7659012137
    K21-065/8657512134.5
    K21-065/9658010115.5
    K21-0666677675
    K21-068688012135
    K21-068/2688010115
    K21-070709012136
    K21-070/1708012134.5
    K21-070/107080894.5
    K21-070/1170857.58.55.5
    K21-070/27085895.5
    K21-070/4708512135.5
    K21-070/570805.46.44.5
    K21-070/67010015168
    K21-070/7709010116
    K21-070/87080784.5
    K21-070/97080674.5
    K21-071/171.4382.555.56.55
    K21-072728010114
    K21-072/1729010126
    K21-072/27282564.5
    K21-075759512136
    K21-075/1758512134.5
    K21-075/2759012135.5
    K21-075/3759010115.5
    K21-075/4758312134
    K21-075/5759510116
    K21-075/67585784.5
    K21-075/77510015167
    K21-075/87585674.5
    K21-07676.295.2510116
    K21-076/276.288.96.357.355
    K21-0787888564.5
    K21-0808010012136
    K21-080/18095895.5
    K21-080/108090674.5
    K21-080/118090564.5
    K21-080/128010512137
    K21-080/138010012.513.56
    K21-080/280959105.5
    K21-080/3809512135.5
    K21-080/480905.46.44.5
    K21-080/58010010116
    K21-080/68010515167
    K21-080/78090784.5
    K21-080/88010015166
    K21-080/9809010114.5
    K21-082/1829210114.5
    K21-082/28210812137
    K21-082/382.55101.614.815.86
    K21-082/48210210116
    K21-0838310314156
    K21-0848410314156
    K21-0858510512136
    K21-085/10851029106
    K21-085/28510012135.5
    K21-085/385959104.5
    K21-085/48510515166
    K21-085/58510510116
    K21-085/68511012137
    K21-085/78511015167
    K21-085/8851009105.5
    K21-085/98510025265.5
    K21-0868610516176
    K21-08888.9107.9512.713.76
    K21-0909011012136
    K21-090/10901006.87.84.5
    K21-090/119012015168
    K21-090/12901059105.5
    K21-090/1390100564.5
    K21-090/290100894.5
    K21-090/39011010116
    K21-090/49011015166
    K21-090/59011212137
    K21-090/69011512137
    K21-090/79010512135.5
    K21-090/8901057.58.55.5
    K21-090/990100454.5
    K21-09292111.115166
    K21-0959510312134
    K21-095/19511010115.5
    K21-095/29511512136
    K21-095/39511515166
    K21-095/49512012137
    K21-095/59512515168
    K21-095/6951109105.5
    K21-095/79511012135.5
    K21-0969610511124
    K21-10010012515167
    K21-100/110012012136
    K21-100/210012015166
    K21-100/310013018198
    K21-100/410012010116
    K21-100/5100110564.5
    K21-100/610013015168
    K21-100/7100110894.5
    K21-100/91001159105.5
    K21-101101.612719.520.57
    K21-10310312514157
    K21-104104.7712715.8716.877
    K21-10510513015167
    K21-105/1105120895.5
    K21-105/210513018197
    K21-105/310512015165.5
    K21-10710712716176
    K21-107/1107.95120.6514155
    K21-107/210713015167
    K21-11011013518197
    K21-110/111014018198
    K21-110/211012512135.5
    K21-110/311013010116
    K21-110/4110120894.5
    K21-110/511013015166
    K21-111111130.115166
    K21-1121121259105
    K21-112/11121259105
    K21-114/1114.81255.76.74.5
    K21-11511514018197
    K21-115/2115125894.5
    K21-115/311513515166
    K21-115/411512312134
    K21-115/511513010115.5
    K21-115/611512515164.5
    K21-1181181328.59.55.5
    K21-12012014518197
    K21-120/112015015168
    K21-120/212013210115
    K21-120/312015018198
    K21-120/412014010116
    K21-120/512014014156
    K21-120/6120130784.5
    K21-120/712014015166
    K21-120/812013515165.5
    K21-12512515518198
    K21-125/112515018197
    K21-125/212515420218
    K21-125/312514011125.5
    K21-125/412514515166
    K21-125/512515515168
    K21-125/612514510116
    K21-125/71251409105.5
    K21-125/81251408.59.55.5
    K21-127127139.710115
    K21-127/112715116177
    K21-127/2127152.419.520.57
    K21-13013015015166
    K21-130/113016018198
    K21-130/2130140894.5
    K21-130/313016015168
    K21-130/413015213147
    K21-132/11321458.59.55
    K21-133133152.515166
    K21-13513514312134
    K21-135/113515015165.5
    K21-135/213516515168
    K21-1361361509105.5
    K21-139139.7152.46.357.355
    K21-14014017018198
    K21-140/114016015166
    K21-140/2140160896
    K21-140/314016010116
    K21-140/414016518197
    K21-140/514015410115.5
    K21-140/61401559105.5
    K21-145145160895.5
    K21-145/114517018197
    K21-145/214517518198
    K21-145/314516515166
    K21-145/41451609105.5
    K21-149149.22187.3215.8716.8710
    K21-15015018018198
    K21-150/315017015166
    K21-150/415018015168
    K21-150/515017010116
    K21-150/61501659105.5
    K21-152152177.819.520.57
    K21-15515516312134
    K21-155/115517515166
    K21-155/215518015167
    K21-16016019022238
    K21-160/116018015166
    K21-160/316019517189
    K21-160/416016812134
    K21-160/5160170564.5
    K21-160/616016913.514.54
    K21-160/716018010116
    K21-16516518515166
    K21-165/116519520218
    K21-165/21651809.510.55.5
    K21-16816818014155
    K21-17017020015168
    K21-170/117020022238
    K21-170/217019015166
    K21-170/317018313145
    K21-17517521520219
    K21-175/117520015167
    K21-175/217519515166
    K21-177177203.222.723.77
    K21-18018021022238
    K21-180/118020015166
    K21-180/218020515167
    K21-180/318020012136
    K21-18518519512134.5
    K21-185/11852009105.5
    K21-19019022025268
    K21-190/119021015166
    K21-190/219021520217
    K21-19519522016177
    K21-196196228.625.826.88
    K21-20020023022238
    K21-200/220024020219
    K21-200/320023520219
    K21-200/420022015166
    K21-200/520023018198
    K21-200/620023015168
    K21-200/720022012136
    K21-200/820022515167
    K21-21021023015166
    K21-210/121024018198
    K21-2152152307.58.55.5
    K21-215/121524518198
    K21-22022025020218
    K21-220/222025015168
    K21-220/322025018198
    K21-22522525018197
    K21-225/122525015167
    K21-225/222524211126
    K21-23023025015166
    K21-230/123026018198
    K21-230/223025012136
    K21-23523525512136
    K21-24024026016176
    K21-240/124027018198
    K21-240/324026518197
    K21-24524527518198
    K21-25025027015166
    K21-250/125027519207
    K21-250/225028022238
    K21-250/325028018198
    K21-250/425027512137
    K21-26026029018198
    K21-26926929012137
    K21-27027030018198
    K21-270/127030022238
    K21-270/227029012136
    K21-270/327030019208
    K21-28028031015168
    K21-280/128030015166
    K21-29029031012136
    K21-290/129030714156
    K21-30030033017188
    K21-300/130032015166
    K21-300/230033019208
    K21-31031033015166
    K21-31931934012137
    K21-32032035015168
    K21-320/132034012136
    K21-320/232035019208
    K21-32532536020219
    K21-34034036015166
    K21-360360420303115
    K21-360/136038016176
    K21-37537539512136
    K21-39039040614156
    K21-40040042015166
    K21-400/140042519207
    K21-43043045015166
    K21-45045048015168