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Spiroflex d.o.o.
Ljudevita Gaja 7
35 208 Ruščica
Croatia

 

Phone: +385 35 _212 425
e-mail: info@spiroflex.hr

 

Lateral expansion joints for pump applications

Introduction

Pumps, compressors, hydrodynamic engines and similar aggregates generate vibrations and noise which is transferred transfer to pipelines, installations and equipment. Bellows pump connectors are designed as bellows with several thin sheets instead of thick one. Multi-ply design permits a lower spring rate and maintains a high flexibility. They are recommended for application with vibration and rapid cyclic motion.

Movements
 

Movements

These bellows absorb only lateral movements in all directions and they are not convenient for axial movements

Structure of lateral expansion joint

Bellows

  • Materials: DIN EN 1.4541 ili 1.4571
  • Multi-ply laminated bellows
  • Bellows welded on flanges or expansion joint with loose flanges
 

Flanges

  • Materials: Carbon steel or stainless steel
  • Welded or loose flanges
 

Tie roads

  • Carbon steel or stainless steel

Application

  • Reduction of tension, vibrations, stresses on pumps, compressors, turbines, engines and burners
  • For small inaccuracies between pipeline and pump or other equipment
  • For compensation of misalignment foundation settlement and assembly movement
  • Installation in gas and water supply systems
 
  • Installation in heating, ventilation and climate system
  • Installation in drinking water systems and waste water plant treatment
  • Lateral expansion joints absorb small thermal movements of pipeline and equipment
Lateral expansion joint with fixed flanges

Lateral expansion joint with fixed flanges

 
Lateral expansion joint with loose flanges

Lateral expansion joint with loose flanges

Advantages of lateral expansion joints

  • Pressure and temperature resistance
  • Flexibility
  • Quick and easy installation
 
  • Corrosion resistance
  • Vacuum resistance
  • Operating safety
 
  • Long service life
  • No maintenance
Lateral expansion joints on aggregate

Lateral expansion joints on aggregate

 
Pressure balanced expansion joint on aggregate

Pressure balanced expansion joint on aggregate

 
Lateral expansion joints on pump

Lateral expansion joints on pump

Installation

The expansion joint should be positioned on the aggregate flange. Spiroflex recommends installation of fix point as close as possible after expansion joint. With installation of fix point the pipeline will be protected from vibrations and noise.

Lateral expansion joints

Typ: STF

 
Lateral expansion joints
 

PN10 Project pressure – standard program

NO Lateral movement Install length Lateral spring rate Gasket surface Outside dia. Flange height Flange thickness Mass
Total mm ±mm L
mm		 N/mm d4
mm		 ØDa
mm		 H
mm		 b
mm		 kg
40 16 8 105 47 88 65 220 18 9
50 17 8,5 130 39 102 80 240 19 11
65 18 9 145 50 122 96 260 20 13
80 16 8 140 55 138 115 280 22 16
100 18 9 170 91 158 140 295 25 20
125 16 8 180 158 188 168 340 28 24
150 14 7 180 265 212 195 370 28 24
200 10 5 195 625 268 260 465 32 30
250 8 4 200 1210 320 315 520 35 36
300 10 5 240 2205 370 380 625 40 48

Table data refer to conditions +20°C, material of bellows DIN EN 1.4541, 1.000 full cycles. For special request please provide inquiry.

PN16 Project pressure – standard program

NO Lateral movement Install length Lateral spring rate Gasket surface Outside dia. Flange height Flange thickness Mass
Total mm ±mm L
mm		 N/mm d4
mm		 ØDa
mm		 H
mm		 b
mm		 kg
40 16 8 110 74 88 65 220 18 40
50 16 8 125 37 102 80 240 19 50
65 16 8 140 82 122 96 275 20 65
80 18 9 160 126 138 117 290 22 80
100 18 9 180 142 158 144 310 25 100
125 16 8 185 295 188 175 375 28 125
150 13 6,5 185 490 212 205 410 28 150
200 10 5 195 975 268 260 465 32 200
250 8 4 210 1825 320 310 590 40 250
300 9 4,5 230 3720 378 385 670 40 300

Table data refer to conditions +20°C, material of bellows DIN EN 1.4541, 1.000 full cycles. For special request please provide inquiry.