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)
1/20000000000.50.250.546116172174013000000000136134620234300
3/40000000000.50.250.534174256262019000000000136133430348460
1610121416515200220.50.250.527.52063043500251522543053561139104138011136132836413610
1 1/4610121416515200320.50.250.522.52583844380321522543053561139104138011136132345522770
1 1/2610121416515200330.50.250.518.53084605240401522543053561139104138011136131954626920
2610121416515200440.50.250.514.537055270005015225430535611391041380221361315657511230
2 1/2610121416515200550.50.250.511.546468876216515225430535611391041380221361312819361331
3610121416515200660.50.250.510556828824180152254305356113910413802313613109711261441
3 1/20000000000.50.250.58.364896488819000000000013613811313111552
4610121416515200880.50.250.57.574211049522100152254305356113910413804313613813015011673
5610121416515200980.50.250.56926137610924125152254305356113910413804413613616218711915
66101216165152001190.50.250.551112165212346150152254305406113910413805413613519522472169
861014161401519015120.750.3750.55.5129518371506132001522543564069661041311751910136227249926417
1081214161401519023160.750.3750.54.51619229616182425020330535640696610413111071910135283312328333
1281214161401519034220.750.3750.53.819412755189642300203305356406966104131115101910134340374633257
148121620851513040251.06250.56250.53.31199170222344935020330540650858710489718112714133210231439167
168121620651511047271.06250.56250.52.813701944257276400203305406508449104759211227141332402644450103
188121620651511056291.06250.56250.52.5154221892840106450203305406508449104759251327141332702977497145
208121620651511067351.06250.56250.52.5202528333176152500203305406508449104759301627141333543853556207
2210141822651511070441.06250.56250.52.3222831173296206550254356457559449104759322027141323904239577280
2410141822651511079461.06250.56250.52243034013412275600254356457559449104759362127141324254626597373
2610141822551590100501.06250.56250.52.3270037463658287650254356457559380104621452327141324735094640390
2810141822551590102581.06250.56250.52290840343904383700254356457559380104621462627141325095486683520
3010141822551590117551.06250.56250.52311643244150438750254356457559380104621532527141325455880726595
320000000001.06250.56250.51.833234612487655680000000000027141325826272853756
3410141822551590112911.06250.56250.51.8353149005602646850254356457559380104621504127141326186664980878
3610141822551590143991.06250.56250.51.537395188632884490025435645755938010462164452714132654705511071148
380000000001.06250.56250.51.53947547665029439500000000002714132691744711381283
40101418225515901731081.06250.56250.51.54154576466761042100025435645755938010462178492714132727783911681417
42121418245515801931101.06250.56250.51.54454612368461163105030535645761038010455287502714132779832811981582
44121418245515801981361.06250.56250.51.54666641371421271110030535645761038010455289612714132817872212501728
460000000001.06250.56250.51.3487667057436160811500000000002714131853911913012186
48121418245515802111541.06250.56250.51.35090699777321826120030535645761038010455295692714131891951613532483
50121418245515802401631.06250.56250.51.353037288802419681275305356457610380104552108732714131928991214042676
520000000001.06250.56250.51.35512758083142138130000000000027141319651030914552907
54121418245515802651851.06250.56250.51.35727787286062308137530535645761038010455211983271413110021070615063139
56121418245515802882031.06250.56250.51.35939817188962465140030535645761038010455213091271413110391111315573352
580000000001.06250.56250.5161488456918433101475000000000271413110761150016074502
60121418245515803092151.06250.56250.516363875594723537150030535645761038010455213997271413111141190716584810
66121418245515803502551.06250.56250.51700096301021642881675305356457610380104552158115271413112251309717885832
72121418244515703853001.06250.56250.50.97636105051095456811800305356457610311104483173135271413113361428719177726
78121418244515704103251.06250.56250.50.98272113811190266911975305356457610311104483185146271413114481547820839100
84121418244515704353501.06250.56250.50.889081225612850864121003053564576103111044831961582714131155916668224911752
96121618244515704854001.06250.56250.50.71018114007147501344124003054064576103111044832181802714131178219049258118280
102121620244515705354501.06250.56250.50.71081214869157001696725503054065086103111044832412032714131189220221274823075
108121620244515705855001.06250.56250.50.61145315759166502185527503054065086103111044832632252714131200421432291429723
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