High-pressure type! Absorbs vibrations, noise, expansion, and displacement in piping systems! High pressure resistance, excellent chemical and heat resistance! Suitable for water supply systems! [Ministry of Land, Infrastructure, Transport and Tourism specifications]
Expansion joints (flexible joints/rubber joints) are used for preventing vibrations and noise generated from piping systems, absorbing expansion and displacement due to temperature and pressure changes, as well as accommodating various dimensional fluctuations during installation and mitigating or preventing the effects of earthquakes and ground subsidence. They are considered essential components in piping equipment. The E-P joint was launched in 1970 (Showa 45) as a low-pressure R type for elevated water tanks, and since then, it has added new products to meet customer needs, including the high-pressure P type integrated with PTFE, known as the F type. Today, it is used by a wide range of customers across various industries, from household drinking water to chemical plant piping. 【Features】 1. Minimal dimensional changes between surfaces due to internal pressure 2. Effective in vibration control 3. High pressure resistance performance usable up to 1.96 MPa (20 kgf/cm²) 4. The inner surface uses synthetic rubber with excellent chemical and heat resistance 5. Small arch with minimal liquid pooling 6. Applicable for drinking water supply For more details, please contact us or refer to the catalog.
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basic information
【Features】 ○Vibration-damping effect → The E-P joint with a small spring constant is effective for vibration damping measures. ○Displacement absorption → Excellent elasticity and shape recovery. → Absorbs displacements such as eccentricity, angular deviation, and expansion, protecting the piping. ○Easy installation → Lightweight and compact, no packing required. → Flanges are of the loose type, making installation easy. ○Composite effect → Vibration-damping effect and displacement absorption can be achieved simultaneously. ● For more details, please contact us or refer to the catalog.
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Applications/Examples of results
Air conditioning equipment Water supply and drainage sanitary equipment Factory equipment Various plant equipment, etc. ● For more details, please contact us or refer to the catalog.
Line up（14）
| Model number | overview |
|---|---|
| High Pressure Type SP | Minimal change in spacing due to internal pressure, excellent pressure resistance. Used in air conditioning systems, water supply and drainage sanitary equipment, etc. |
| Ball Flex | Excellent vibration absorption. Adopts loose flange, making installation work easier. Used in air conditioning systems, water supply and drainage sanitary equipment, etc. |
| Cylindrical S Flex | Can accommodate large eccentricity. Adopts loose flange, making installation work easier. Used in air conditioning systems, water supply and drainage sanitary equipment, etc. |
| Cylindrical SL Flex | Can accommodate large eccentricity. Adopts loose flange, making installation work easier. Used in air conditioning systems, water supply and drainage sanitary equipment, etc. |
| Low Pressure Type R | Small deformation stress, suitable for vibration damping and expansion absorption of low-pressure resin piping. Adopts loose flange, making installation work easier. Used for protecting connection parts around FRP tanks and for vibration damping of low-pressure pumps and blowers. |
| Low Pressure Type RM | Small deformation stress, suitable for vibration damping and expansion absorption of low-pressure resin piping. Adopts loose flange, making installation work easier. Used for protecting connection parts around FRP tanks and for vibration damping of low-pressure pumps and blowers. |
| Pressure Type A1 Flex | Excellent vibration damping effect. Adopts loose flange, making installation work easier. Used for vibration damping of pumps and blowers in factory equipment. |
| Pressure Type P | Most versatile in the lineup. Durable and stable with a combination of strong reinforcing fibers and steel wire. Uses EPDM for inner and outer rubber, excellent in chemical resistance and weather resistance. Adopts loose flange, making installation work easier. Used for vibration damping of general-purpose pumps and blowers in factory equipment and for expansion absorption of heat-resistant resin piping. |
| Pressure Type PL | Has a larger allowable displacement than the P type. Durable and stable with a combination of strong reinforcing fibers and steel wire. Uses EPDM for inner and outer rubber, excellent in chemical resistance and weather resistance. Adopts loose flange, making installation work easier. Used for expansion and displacement absorption in factory equipment piping and water supply and drainage piping. |
| Pressure Type PB | No fluid or residue remains inside the product. Adopts loose flange, making installation work easier. Used for vibration damping of general-purpose pumps and blowers in factory equipment and for expansion absorption of heat-resistant resin piping. |
| Low Pressure (Inner PTFE) Type RF | Uses PTFE on the liquid contact surface, excellent in chemical resistance. Improved durability due to integration with durable and strong rubber. Used for corrosive chemical piping in chemical plants, oil, solvent, and food transfer piping, pure water piping in IC factories, vibration damping of corrosion-resistant pumps, and piping for hot water and pool water. |
| Pressure (Inner PTFE) Type PF | Uses PTFE on the liquid contact surface, excellent in chemical resistance. Improved durability due to integration with durable and strong rubber. Used for corrosive chemical piping in chemical plants, oil, solvent, and food transfer piping, pure water piping in IC factories, vibration damping of corrosion-resistant pumps, and piping for hot water and pool water. |
| Super Flexible (Inner PTFE) Type SF | Uses PTFE on the liquid contact surface, excellent in chemical resistance. Improved durability due to integration with durable and strong rubber. Used for corrosive gas piping in chemical plants, etc. |
| Flexible Joint G Flex | Absorbs large displacements with relatively short spacing dimensions. Can absorb displacements in all directions, suitable for vibration resistance applications. No fluid or residue remains inside the product. Used in air conditioning systems, water supply and drainage sanitary equipment, decoupling structures from piping, seismic protection for tanks and piping systems, and protecting pipelines in soft ground. |
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Company information
The high quality, ease of use, and excellent performance of our rubber products are characteristics that those who have used them can feel, and they are the result of many years of cultivation. We do not wish to become complacent with these achievements; instead, we aim to further refine and enhance our technology, experience, and high reliability to benefit society. By listening to the voices of an increasingly advanced and diverse era, we are committed to contributing to society by providing highly reliable, high-value-added products.