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 (psi) SRPressure (psi) LPPressure (psi) 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)
1/261012141651520022.250.50.250.5461161721740.0071314.42428.833.61137.675103.42513790.90721.020613613462030300.009
3/46101214165152002.52.250.50.250.5341742562620.0211914.42428.833.61137.675103.42513791.1341.020613613343045460.028
1610121416515200330.50.250.527.52063043500.0362514.42428.833.61137.675103.42513791.36081.36081361327.53653610.049
1 1/4610121416515200440.50.250.522.52583844380.093214.42428.833.61137.675103.42513791.81441.81441361322.54567770.12
1 1/26101214165152004.54.50.50.250.518.53084605240.164014.42428.833.61137.675103.42513792.04122.04121361318.55481920.22
26101214165152005.560.50.250.514.53705527000.285014.42428.833.61137.675103.42513792.49482.72161361314.565971230.37
2 1/261012141651520087.50.50.250.511.54646887620.526514.42428.833.61137.675103.42513793.62883.4021361311.5811201330.71
3610121416515200980.50.250.5105568288240.88014.42428.833.61137.675103.42513794.08243.62881361310971451441.08
3 1/26101216165152001190.50.250.58.36489648881.339014.42428.838.41137.675103.42513794.98964.0824136138.31131691561.8
461014161401519015120.50.250.57.574211049521.8710014.42433.638.4965.3103.4251310.056.8045.4432136137.51301931672.53
581214161401519023160.50.250.56926137610923.6712519.228.833.638.4965.3103.4251310.0510.43287.25761361361622411914.97
681214161401519034220.50.250.551112165212346.415019.228.833.638.4965.3103.4251310.0515.42249.97921361351952892168.68
88121620851513040250.750.3750.55.51295183715061320019.228.838.448586.075103.425896.3518.14411.341910135.522732226417
108121620651511047270.750.3750.54.51619229616182425019.228.838.448448.175103.425758.4521.319212.24721910134.528340228333
128121620651511056290.750.3750.53.81941275518964230019.228.838.448448.175103.425758.4525.401613.15441910133.834048233257
148121620651511067351.06250.56250.53.31199170222344935019.228.838.448448.175103.425758.4530.391215.8762714133.321029839167
1610141822651511070441.06250.56250.52.8137019442572764002433.643.252.8448.175103.425758.4531.75219.95842714132.8240341450103
1810141822651511079461.06250.56250.52.51542218928401064502433.643.252.8448.175103.425758.4535.834420.86562714132.5270383497144
2010141822551590100501.06250.56250.52.52025283331761525002433.643.252.8379.225103.425620.5545.3622.682714132.5355496556207
2210141822551590102581.06250.56250.52.32228311732962065502433.643.252.8379.225103.425620.5546.267226.30882714132.3390546577279
2410141822551590117551.06250.56250.522430340134122756002433.643.252.8379.225103.425620.5553.071224.9482714132426596598372
2610141822551590112911.06250.56250.52.32700374636582876502433.643.252.8379.225103.425620.5550.803241.27762714132.3473656641388
2810141822551590143991.06250.56250.522908403439043837002433.643.252.8379.225103.425620.5564.864844.90642714132509706684519
30101418225515901731081.06250.56250.523116432441504387502433.643.252.8379.225103.425620.5578.472848.98882714132546757727593
32121418245515801931101.06250.56250.51.833234612487655680028.833.643.257.6379.225103.425551.687.544849.8962714131.8582808854753
34121418245515801981361.06250.56250.51.835314900560264685028.833.643.257.6379.225103.425551.689.812861.68962714131.8618858981875
36121418245515802111541.06250.56250.51.537395188632884490028.833.643.257.6379.225103.425551.695.709669.85442714131.565590911081144
38121418245515802401631.06250.56250.51.539475476650294395028.833.643.257.6379.225103.425551.6108.86473.93682714131.569195911391279
40121418245515802651851.06250.56250.51.54154576466761042100028.833.643.257.6379.225103.425551.6120.20483.9162714131.5728100911691413
42121418245515802882031.06250.56250.51.54454612368461163105028.833.643.257.6379.225103.425551.6130.636892.08082714131.5780107211991577
44121418245515803092151.06250.56250.51.54666641371421271110028.833.643.257.6379.225103.425551.6140.162497.5242714131.5817112312511723
46121418245515803252301.06250.56250.51.34876670574361608115028.833.643.257.6379.225103.425551.6147.42104.3282714131.3854117413022180
48121418245515803502551.06250.56250.51.35090699777321826120028.833.643.257.6379.225103.425551.6158.76115.6682714131.3891122513542475
50121418244515703853001.06250.56250.51.35303728880241968127528.833.643.257.6310.275103.425482.65174.636136.082714131.3929127614052668
52121418244515704103251.06250.56250.51.35512758083142138130028.833.643.257.6310.275103.425482.65185.976147.422714131.3965132814562898
54121418244515704353501.06250.56250.51.35727787286062308137528.833.643.257.6310.275103.425482.65197.316158.762714131.31003137915073129
56121618244515704854001.06250.56250.51.35939817188962465140028.838.443.257.6310.275103.425482.65219.996181.442714131.31040143115583342
58121620244515705354501.06250.56250.516148845691843310147528.838.44857.6310.275103.425482.65242.676204.1227141311077148116084488
60121620244515705855001.06250.56250.516363875594723537150028.838.44857.6310.275103.425482.65265.356226.827141311114153316594796
666101214165152003502551.06250.56250.5170009630102164288167514.42428.833.61137.675103.4251379158.76115.66827141311226168617895814
726101214165152003853001.06250.56250.50.9763610505109545681180014.42428.833.61137.675103.4251379174.636136.082714130.91337184019187703
786101214165152004103251.06250.56250.50.9827211381119026691197514.42428.833.61137.675103.4251379185.976147.422714130.91449199320849072
846101214165152004353501.06250.56250.50.8890812256128508641210014.42428.833.61137.675103.4251379197.316158.762714130.815602146225011716
966101214165152004854001.06250.56250.50.710181140071475013441240014.42428.833.61137.675103.4251379219.996181.442714130.717832453258318224
1026101214165152005354501.06250.56250.50.710812148691570016967255014.42428.833.61137.675103.4251379242.676204.122714130.718942604274923004
1086101214165152005855001.06250.56250.50.611453157591665021855275014.42428.833.61137.675103.4251379265.356226.82714130.620062760291629631

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