Japan, Naigai Rubber Industry Co.,Ltd
Naigai Ultra-Flexible SF Type (Large Diameter ) E-P Joint
Made in Japan
Manufacturer: Naigai Rubber Industry Co.,Ltd
Model: Ultra-Flexible SF Type (large diameter )
Features
Anti-vibration effect
EP JOINT, which has a small spring constant, is effective in preventing vibration.
Displacement absorption
EP JOINT, which has excellent elasticity and shape recovery properties, protects piping by absorbing displacements such as eccentricity, declination, expansion and contraction.
Easy construction
EP JOINT is lightweight and compact, does not require packing, and has a loose flange, making it easy to install.
Combined effect
By using EP JOINT, you can obtain vibration isolation effect and displacement absorption property at the same time.
Operating pressure: 0.02MPa (2kgf/cm²) or lower
Negative pressure: -0.01MPa (-0.1kgf/cm²) or higher
Operating temperature: -30°C~+100°C (Cooling and heating water)
• Before use, check that maximum working pressure and maximum working temperature are within operational ranges.
Standard dimensions and allowable displacements
Nominal diameter | Unit dimensions | |||
| φd (mm) | φg (mm) | L (mm) | t (mm) | |
| 350 | 353 | 417 | 184 | 4 |
| 400 | 403 | 478 | 190 | 4 |
| 450 | 454 | 533 | 194 | 4 |
| 500 | 504 | 585 | 228 | 4 |
| 600 | 605 | 695 | 240 | 5 |
| 650 | 650 | 721 | 258 | 5 |
| 700 | 700 | 800 | 258 | 6 |
| 800 | 809 | 905 | 272 | 6 |
| Allowable displacement | |||
| Expansion (mm) | Contraction (mm) | Eccentricity (mm) | Declination (°) |
| 20 | 24 | 15 | 5 |
| 20 | 24 | 15 | 5 |
| 20 | 24 | 15 | 5 |
| 26 | 30 | 20 | 5 |
| 26 | 30 | 20 | 4 |
| 26 | 30 | 20 | 4 |
| 26 | 30 | 20 | 4 |
| 31 | 35 | 20 | 4 |
| Allowable displacement upon installation | Weight (kg) | |||
| Expansion (mm) | Contraction (mm) | Eccentricity (mm) | Declination (°) | |
| 7 | 8 | 4 | 1 | 49.5 |
| 7 | 8 | 4 | 1 | 67.8 |
| 7 | 8 | 4 | 1 | 80.8 |
| 9 | 11 | 4 | 1 | 94.7 |
| 9 | 11 | 4 | 1 | 145.6 |
| 9 | 11 | 4 | 1 | 154.8 |
| 9 | 11 | 4 | 1 | 166.6 |
| 11 | 12 | 4 | 1 | 216.6 |
Bolt used | Dimensions of control unit set | Number of installed units | |
| L₁ (mm) | L₂ (mm) | ||
| M-20 | 170 | 100 | 3 |
| M-24 | 174 | 102 | 3 |
| M-24 | 176 | 102 | 3 |
| M-24 | 214 | 128 | 3 |
| M-27 | 224 | 136 | 3 |
| M-27 | 240 | 150 | 3 |
| M-27 | 238 | 148 | 3 |
| M-27 | 255 | 153 | 3 |
Weights with SS400 or JIS10K flanges (standard) mounted are indicated. Dimension allowances on installation are included in allowable displacements. (Allowable displacement = Dimension allowances on installation + Displacement under operation)
Product Features
- Ultra-flexible type PTFE inner surface coating type.
- Excellent chemical resistance employing PTFE (polyethylene tetrafluoride ) on areas in contace with liquid (internal surface).
- Increased resistance to external shocks due to integration of structure with durable, strong rubber.
Product applications
- Piping for corrosive gas in chemical plants.
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