水研 List of Products and Services

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.*

• Water Supply Facilities

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.

• Water Supply Facilities

The "super branching pipe" is a special pipe that incorporates a ball valve at the branching section. It allows for simultaneous installation of distribution pipes and branching of water supply pipes. Additionally, since perforation work is not required, it contributes to overall cost reduction of the construction. *For more details, please refer to the catalog or feel free to contact us.

• Water Supply Facilities
• Water supply facilities

It is a flangeless type that incorporates a unit with a PE insertion port into the "S-Bunki Valve." The unit connection part ensures a detachment prevention resistance of 3DkN, making it ideal for seismic piping. Additionally, like the "S-Bunki Valve," it guarantees reliable water tightness with a full circumference packing and corrosion resistance with internal and external epoxy powder coating. *For more details, please refer to the catalog or feel free to contact us.

• Sewerage facilities
• Pipeline Construction
• Water Supply Facilities

By incorporating a ball-shaped flexible section (seismic isolation unit), we can relieve the stress on the branching section in shallow buried installations where ground displacement is likely to occur, thus safely protecting the pipeline. Additionally, similar to the "S-Bunki Valve," we ensure reliable water tightness with a full circumference packing and corrosion resistance with internal and external epoxy powder coating. *For more details, please refer to the catalog or feel free to contact us.

• Sewerage facilities
• Pipeline Construction
• Water Supply Facilities

The "S-Bunki Valve" is a groundbreaking product that integrates the JWWA B 120 "Soft Seal Partition Valve for Water Supply" with a constant water branch pipe. It is also compatible with shallow burial, allowing for quick installation and reduced construction costs. High corrosion resistance and quality have been achieved through epoxy resin powder coating on both the inner and outer surfaces. Additionally, both ends of the branch are equipped with a full circumference packing, accommodating movement in both the pipe axis and pipe circumference directions. *For more details, please refer to the catalog or feel free to contact us.

• Sewerage facilities
• Pipeline Construction
• Water Supply Facilities

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.

• Fittings
• Piping and insulation
• Water supply facilities

**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.*

• Fittings
• Piping and insulation
• Water supply facilities

The "S-Gate" series of EM continuous water valve construction methods has introduced the S-Gate VP for PVC pipes. Since it has a built-in working partition valve in the main body, the valve body can be easily removed without using special equipment. The perforating machine is compatible with both 12V and 100V power sources. Both the main body and construction equipment are compact, minimizing the burden on the pipes.

• Railway Construction
• Pipeline Construction

- It can be installed at any point on an existing pipe without interrupting the water flow. - After slightly leaving the pipe thickness, it is processed with a groove cutting, and then cut with a knife gate, ensuring that no cutting chips enter the pipe. - After installation, it can be operated repeatedly for opening and closing. - Since it is cut with a thin knife gate, the opening area is minimal, which minimizes the load on the pipe. - Because there is no drilling work involved, it can be easily installed in a short time. - Both the product and construction equipment are compact, allowing installation in tight spaces and indoor piping.

• Piping materials (copper pipes, cast iron pipes)
• Water Supply Facilities

The "EM Continuous Water Method" is a new technique that uses end mill cutting tools for continuous water construction. Conventional methods used a circular blade called a "hole saw," which could only drill pipes in a limited round shape. The "EM Continuous Water Method" allows for drilling by moving the end mill blade at a "point," enabling the cutting of pipes in free shapes and sizes. *We are currently offering a free comprehensive catalog that explains the "EM Continuous Water Valve Method"! Please download for more details. 【Features of the EM Continuous Water Valve Method "S-Gate"】 ■ Compact design! ■ Excellent water stopping performance! ■ Smooth repeated opening and closing operations! ■ Chips are forcibly discharged outside the pipe! *For more details, please contact us or download the catalog to view.

• Sewerage facilities
• Pipeline Construction
• Water Supply Facilities

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.

• Expansion joint hardware
• Vibration isolation, vibration control, and earthquake resistance construction
• Water and sewerage pipe fittings

The "All Fits Joint" is a fitting designed for connecting various types of pipes, including asbestos pipes, PVC pipes, cast iron pipes, steel pipes, polyethylene pipes, and fume pipes. It is suitable for emergency repairs and maintenance of buried pipes when the type of pipe is unknown. 【Ideal for】 ◎ Those who do not know the type of buried pipe and take time to respond to emergency repairs... ◎ Those who stock fittings for each type of pipe, incurring space and cost... 【Features】 ◆ Can connect different types of pipes with varying outer diameters thanks to a special packing! ◆ High corrosion resistance due to internal and external epoxy resin powder coating ◆ No need to stock different fittings for each type of pipe 【For more details, please download the catalog or feel free to contact us】

• others

The "S-Gate EX" is a new model of the groundbreaking EM continuous water valve method "S-Gate," which perforates existing pipes in a groove shape using an end mill and inserts a soft seal valve body. The main body and construction equipment have become even more compact, making it possible to install continuous water valves in narrow spaces where installation was previously difficult. Furthermore, a simpler structure has been achieved, streamlining the construction process. Safe and speedy installation is now possible. 【Features】 ■ Can be installed at any desired location with continuous water ■ Smooth repeated opening and closing operations due to the soft seal valve body ■ Low torque operation possible with the soft seal valve body ■ All chips from the perforation are forcibly discharged outside the pipe ■ Valve body removal is possible *For more details, please refer to the catalog or feel free to contact us.

• Railway Construction
• Pipeline Construction

A simple and smart design that consolidates the experience and know-how gained from the EM continuous water valve method "S-Gate." By drilling the existing pipe in a groove shape and inserting a soft seal valve body, water can be stopped with a torque similar to hand-tightening, allowing for smooth repeated opening and closing operations. The compact main body, which emphasizes functionality, and the small drilling machine designed for 100V power supply minimize the load on the pipe, enabling safe and speedy construction.

• Railway Construction
• Pipeline Construction

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.

• Fittings
• Piping and insulation
• Water supply facilities

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.

• Vibration isolation, vibration control, and earthquake resistance construction

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.

• Vibration isolation, vibration control, and earthquake resistance construction
• Tile work

EF Bunkisoft integrates EF saddles and Hypolysoft (manufactured by Maezawa Kogyo Co., Ltd.) with existing polyethylene pipes using EF joint (electrofusion) to create a branch without stopping the water flow. The branching section becomes a unified structure with the pipeline, contributing to the seismic resistance of the pipeline. For more details, please download the catalog.

• others

The Esclamp is a ductile iron leak repair fitting for pipes with a nominal diameter of 75 to 300 millimeters (for straight pipe sections). It is compatible with cast iron pipes, steel pipes, and PVC pipes, making it economical as there is no need to stock repair joints for each type of pipe. The body is split into two parts, allowing for installation without cutting the pipe. With a generous effective length, it can reliably cover damaged areas. Its easy installation enables quick response even in emergencies. It features a reliable full-circle gasket that provides excellent water tightness. For more details, please contact us or refer to the catalog.

• Water and sewerage pipe fittings
• Tile work