Series SJ-21 

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The SJ-21 is the industry standard spool-type expansion joint. The SJ-21 is available in configurations from zero to four arches – depending on movement requirements – and 3 standard pressure ratings in a variety of elastomers. This hand-built expansion joint can be adapted to the most unusual or difficult applications. Available options include filled arches to eliminate settling of solids in the arch, Teflon liners for severe chemical service, soft cuff ends for slip-on installation, and concentric or eccentric tapered ends for connecting different pipe sizes.

Specifications

Size (in)F/F per Arch (in) 1F/F per Arch (in) 2F/F per Arch (in) 3F/F per Arch (in) 4Pressure (psi) SRPressure (psi) LPPressure (psi) HPJoint Weight (lb)Rings Weight (lb)Axial Compression
(in)
Axial Extension
(in)
Lateral Deflection
(in)
Angular Deflection (º)Compression (lb/in)Extension (lb/in)Lateral
(lb/in)
Angular
(ft-lb/º)
 Size (mm)F/F per Arch (mm) 1F/F per Arch (mm) 2F/F per Arch (mm) 3F/F per Arch (mm) 4Pressure (kpa) SRPressure (kpa) LPPressure (kpa) HPJoint Weight (kg)Rings Weight (kg)Axial Compression
(mm)
Axial Extension
(mm)
Lateral Deflection
(mm)
Angular Deflection (º)Compression (N/mm)Extension (N/mm)Lateral
(N/mm)
Angular
(N-m/º)
1610121416515200220.50.250.527.52063043500251522543053561139104138011136132836413610
1 1/461012141651520032 0.250.522.52583844380321522543053561139104138011136132345522770
1 1/2610121416515200330.50.250.518.53084605240401522543053561139104138011136131954626920
2610121416515200450.50.250.514.53705527000501522543053561139104138022.251361315657511230
2 1/2610121416515200560.50.250.511.54646887621651522543053561139104138022.71361312819361331
3610121416515200670.50.250.5105568288241801522543053561139104138023.1513613109711261441
4610121416515200880.50.250.57.5742110495221001522543053561139104138043.613613813015011673
5610121416515200990.50.250.569261376109241251522543053561139104138044.0513613616218711915
661012161651520011100.50.250.5511121652123461501522543054061139104138054.513613519522472169
861014161401519015150.750.3750.55.512951837150613200152254356406966104131176.751910136227249926417
1081214161401519023180.750.3750.54.5161922961618242502033053564069661041311108.11910135283312328333
1281214161401519034250.750.3750.53.81941275518964230020330535640696610413111511.251910134340374633257
148121620851513040271.06250.56250.53.3119917022234493502033054065085871048971812.152714133210231439167
168121620651511047331.06250.56250.52.8137019442572764002033054065084491047592114.8527141332402644450103
188121620651511056331.06250.56250.52.51542218928401064502033054065084491047592514.8527141332702977497145
208121620651511067381.06250.56250.52.52025283331761525002033054065084491047593017.127141333543853556207
2210141822651511070441.06250.56250.52.32228311732962065502543564575594491047593219.827141323904239577280
2410141822651511079481.06250.56250.522430340134122756002543564575594491047593621.627141324254626597373
2610141822551590100571.06250.56250.52.32700374636582876502543564575593801046214525.6527141324735094640390
2810141822551590102621.06250.56250.522908403439043837002543564575593801046214627.927141325095486683520
3010141822551590117661.06250.56250.523116432441504387502543564575593801046215329.727141325455880726595
3410141822551590112781.06250.56250.51.83531490056026468502543564575593801046215035.127141326186664980878
3610141822551590143811.06250.56250.51.53739518863288449002543564575593801046216436.452714132654705511071148
40101418225515901731061.06250.56250.51.5415457646676104210002543564575593801046217847.72714132727783911681417
42121418245515801931161.06250.56250.51.5445461236846116310503053564576103801045528752.52714132779832811981582
44121418245515801981271.06250.56250.51.5466664137142127111003053564576103801045528957.152714132817872212501728
48121418245515802111381.06250.56250.51.3509069977732182612003053564576103801045529562.12714131891951613532483
50121418245515802401541.06250.56250.51.35303728880241968127530535645761038010455210869.32714131928991214042676
54121418245515802651601.06250.56250.51.35727787286062308137530535645761038010455211972271413110021070615063139
56121418245515802881741.06250.56250.51.35939817188962465140030535645761038010455213078.3271413110391111315573352
60121418245515803091901.06250.56250.516363875594723537150030535645761038010455213985.5271413111141190716584810
66121418245515803502361.06250.56250.51700096301021642881675305356457610380104552158106.2271413112251309717885832
72121418244515703852781.06250.56250.50.97636105051095456811800305356457610311104483173125.1271413113361428719177726
78121418244515704102961.06250.56250.50.98272113811190266911975305356457610311104483185133.2271413114481547820839100
84121418244515704353361.06250.56250.50.88908122561285086412100305356457610311104483196151.22714131155916668224911752
96121618244515704854801.06250.56250.50.71018114007147501344124003054064576103111044832182162714131178219049258118280
102121620244515705354501.06250.56250.50.71081214869157001696725503054065086103111044832412032714131189220221274823075
108121620244515705855001.06250.56250.50.61145315759166502185527503054065086103111044832632252714131200421432291429723
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