Description
Description (Features)
Small diameter piping system can present real problems when stress alleviation is required. Space is generally critical. Conventional flanged expansion joints cannot be used without relocating piping runs. QFTU type solves this problem because of their screw ends.
Typical Applications
- Building equipment, piping systems for industrial plans and piping systems for private residence.
- Prevention of disasters due to earthquakes and subsidence of ground.
- Waterworks, sewerage and sanitary lines (feed – water and drainage).
Operating Conditions
(based on Neoprene Rubber Material)
| Operating Pressure | 16kg / cm^2(228psi) |
| Burst Pressure | Over 50kg / cm^2(711 psi) |
| Negative Pressure | 500mm Hg |
| Working Temperature | -20 °C to 100 °C (-4 °F to 212 °F) |
| Working Fluids | Water, Hot Water, Sea Water, Compressed Air, Steam, Solvent, Acid, Weak Alkalies |
Twin-Sphere Union
| Item | Part | Material |
| 1 | UNION | Malleable Iron |
| 2 | Reinforcing Cloth | Nylon Fabric |
| 3 | Elastomer | Synthetic Rubber |
- Standard rubber material uses EPDM & Neoprene or may be replaced by other special synthetic rubber.
Dimension and allowable tolerance / movement
| Nominal Bore (Inner Dia.) Size |
lenght of Bellows (mm) | Transverse Movement +/-(mm) |
Axial Elongation (mm) |
Axial Compression (mm) |
Angular Deflection |
|
| Face to Face Distance(mm) | Total Acceptable Telerance +(-mm) | |||||
| 20mm 3/4″ | 190 | 2 | 22 | 6 | 10 | 20° |
| 25m 1″ | 200 | 2 | 22 | 6 | 10 | 20° |
| 32mm 1.1/4″” | 200 | 2 | 22 | 6 | 15 | 20° |
| 40mm 1.1/2″” | 200 | 2 | 22 | 6 | 15 | 20° |
| 50mm 2″” | 200 | 2 | 22 | 6 | 15 | 20° |
| 65mm 2.1/2″” | 235 | 2 | 30 | 6 | 15 | 20° |
| 80mm 3″ | 245 | 2 | 30 | 6 | 15 | 20° |
