Plasticbellowsandgalvanizedbellowsperformancecomparison：performancePlasticbellowsGalvanizedbellowsCorrosionresistanceMorestable,nev
Plastic bellows and galvanized bellows performance comparison：
| performance | Plastic bellows | Galvanized bellows |
| Corrosion resistance | More stable, never rust | Bad bonding with cement |
| Durability | Aging sealed cement sealing time of 50 years | The service life is generally 5 years |
| Minimum bend radius | 0.9-1.5Rice (about 10-15 times the inner diameter) | Greater than 30 times the inner diameter |
| Local load resistance | Will not leak after loading, no leakage of leakage concerns | Pipe deformation can not be restored after the load will leak |
| Focus on the resistance of the load | Not afraid to step on the pressure, not easy to be smashed stick pierced | Stepping easy deformation |
| Water pressure tightness | Humidity of 20 degrees, the pressure of 50KPa conditions, keep leaks for 24 hours | No pressure will leak, there is pressure under the infiltration of cement |
| Coefficient of friction | 0.14 | 0.25 |
| Insulation | Not conductive, good insulation | Conductive |
| Adhesion to concrete | High ripple, good adhesion to concrete | Rust and reduce the bond with the concrete |
Technical Parameters
Circular bellows technical parameters table：
| specification | d(Φ) | D(Φ) | S(mm) | Supporting the use of anchors |
| DF-SBG-50Y | 50 | 61 | 2 | M15-3～5 |
| DF-SBG-70Y | 70 | 81 | 2 | M15-6～9 |
| DF-SBG-80Y | 80 | 91 | 2 | M15-7～70 |
| DF-SBG-85Y | 85 | 99 | 2 | M15-10～12 |
| DF-SBG-90Y | 90 | 104 | 2 | M15-11～13 |
| DF-SBG-100Y | 100 | 114 | 2 | M15-13～19 |
| DF-SBG-110Y | 110 | 124 | 2 | M15-19～25 |
| DF-SBG-120Y | 120 | 135 | 2.5 | M15-20～27 |
| DF-SBG-130Y | 430 | 145 | 2.5 | M15-28～30 |
| DF-SBG-140Y | 140 | 155 | 3 | M15-31～37 |
| DF-SBG-160Y | 160 | 175 | 3 | M15-38～55 |
Flat bellows technical parameters table
| specification | U1 | U2 | s | Supporting the use of anchors |
| DF-SBG-46B | 46 | 20 | 2 | BM15-2 |
| DF-SBG-60B | 60 | 20 | 2 | BM15-3 |
| DF-SBG-72B | 72 | 23 | 2.5 | BM15-4 |
| DF-SBG-90B | 90 | 23 | 2.5 | BM15-5 |
Round connecting pipe technical parameter table
| specification | d(Φ) | D(Φ) | L(mm) |
| DFLG-50 | 64 | 67 | 160 |
| DFLG-70 | 84 | 87 | 160 |
| DFLG-85 | 102 | 106 | 160 |
| DFLG-100 | 117 | 121 | 160 |
| DFLG-120 | 137 | 141 | 170 |
| DFLG-130 | 147 | 151 | 170 |
Flat connecting pipe technical parameter table
| specification | U1 | U2 | L |
| BLG-46 | 59 | 33 | 160 |
| BLG-60 | 73 | 33 | 160 |
| BLG-72 | 87 | 38 | 160 |
| BLG-90 | 105 | 38 | 160 |
Round connector technical parameters table
| specification | d(Φ) | D(Φ) | d1(Φ) | D1(Φ) | L |
| DFLT-3/4 | 64 | 67 | 51 | 55 | 130 |
| DFLT-5 | 64 | 67 | 60 | 64 | 130 |
| DFLT-6/7 | 84 | 87 | 75 | 79 | 130 |
| DFLT-8/9 | 84 | 87 | 80 | 84 | 130 |
| DFLT-10/12 | 102 | 106 | 85 | 89 | 130 |
| DFLT-13/19 | 117 | 121 | 95 | 99 | 130 |
| DFLT-20/24 | 137 | 141 | 105 | 109 | 145 |
| DFLT-25/27 | 137 | 141 | 116 | 120 | 145 |
Flat connector technical parameters table
| specification | U1 | U2 | U3 | U4 | L |
| BLT-2 | 59 | 33 | 50 | 20 | 130 |
| BLT-3 | 73 | 33 | 60 | 20 | 130 |
| BLT-4 | 87 | 38 | 71 | 21 | 130 |
| BLT-5 | 105 | 38 | 91 | 21 | 130 |
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