水研 List of Products and Services

In 1980, Suiken developed the industry's first ductile cast iron ball-shaped flexible expansion joint, aiming to improve the safety of the most important joint parts for lifelines. The "Flexibender" has a large and flexible deformation absorption capacity in all directions, and it showed no damage during the 1989 San Francisco earthquake, the 1994 Los Angeles earthquake, and the 1995 Great Hanshin-Awaji Earthquake, protecting the pipeline from disconnection and damage, and demonstrating excellent "seismic isolation quality." For more details, please contact us or download the catalog.

The "PE Bender" is a ball-shaped flexible joint made of ductile cast iron that incorporates polyethylene pipes through a unique assembly technique, combining toughness and flexibility. Its simple integrated structure without bolts, which consolidates the achievements and know-how of the ball-shaped flexible expansion pipe "Flex Bender," excels in water tightness and durability, making it ideal for seismic piping systems. The ball section adopts the know-how of the "Flex Bender," which has a disengagement resistance of 3DkN, and the polyethylene pipe integrated into the ball section demonstrates outstanding strength without any disconnection or leakage, even under severe testing conditions. For more details, please contact us or refer to the catalog.

This is a recoil-free seismic isolation joint that adapts to composite displacements with a rational design of ball joints and expansion pipes. 【Features】 ○ Diameter: 25 to 600 mm ○ High flexibility ○ Minimal thrust generated by internal pressure ○ Excellent strength and durability ○ Easy piping layout ○ No volume change inside the joint during operation. ● For other functions and details, please download the catalog.

This is a flexible expansion joint that smoothly responds to twisting, bending, and eccentricity caused by earthquakes and ground subsidence. By installing it around structures such as buildings and factories, it flexibly absorbs complex displacements on drainage pipelines, ensuring the safety of the pipelines. For more details, please contact us or refer to the catalog.

The "Adjustable Bender" has a ball section that bends at a 15° angle, allowing for subtle angle adjustments on site. It can easily align angles over short spans, making it very convenient for pipe alignment and bypassing obstacles.

The "expansion joint" has an expansion capability of ±30mm, making it ideal not only for use as an expansion pipe but also as an adjustment pipe during valve replacement and for dimensional adjustments in various piping systems. *For more details, please refer to the catalog or feel free to contact us.*

This is a ductile cast iron flange adapter compatible with a nominal diameter of up to 2600mm. For more details, please contact us or download the catalog.

The "Insulated Flexible Bender" is a flexible expansion pipe made of a stainless steel short pipe integrated type (insulated type). The stainless steel short pipe assembly has electrical insulation resistance, eliminating the need for corrosion prevention due to dissimilar metal contact. Furthermore, it meets the detachment prevention resistance of 3DkN, making it ideal for seismic piping systems. Flexible expansion pipes can be integrated by welding at the bridge pier sections of water pipe bridges and around water distribution tanks using stainless steel pipes. 【Features】 - No need for corrosion prevention due to dissimilar metal contact - Clears detachment prevention resistance of 3DkN - The stainless steel short pipe assembly has a simple structure without bolts - Can be combined with various connection shapes of ductile iron pipes, including GX type - Can be integrated with polyethylene pipes through EF joining *For more details, please refer to the catalog or feel free to contact us.

**Features** ■Direct connection with PE pipes: The flexible bender body is equipped with an insertion port for polyethylene pipes (PE pipes). Additionally, it can be integrated with polyethylene pipes using EF joints, enhancing the integrity and durability of the piping. ■Excellent flexibility: The ball joint section is designed to rotate and bend 360°, absorbing twists, eccentricities, and local displacements in the piping. This mitigates the impact on the piping caused by ground movement and earthquakes, making it effective for seismic piping. ■High water tightness and durability: The boltless, simple integrated structure provides high water tightness and durability. Even in the integrated sections with PE pipes, the design minimizes the risk of disconnection or leakage under harsh conditions. ■Various combinations possible: It can be combined with various connection types of ductile iron pipes, including the GX type, allowing for connections between different types of piping. *For more details, please refer to the catalog or feel free to contact us.*