ハチケン List of Products and Services

【Features】 ◆ Designed individually based on usage conditions. ◆ Manufactured from a single unit. ◆ Rubber materials: (EPDM, CR, NBR, IIR, abrasion-resistant) ◆ With flange: (JIS, drinking water F12, ANSI, DIN, etc.) ◆ Can be used under negative pressure. ◆ Different diameters on the left and right, special inner diameters. 【Examples of Use (partial)】 ◆ Factory drainage piping ◆ Various exhaust piping ◆ Dust collector piping ◆ Blower and fan piping ◆ Connection of complex 3D piping ◆ Commercial washing machine drainage ◆ Connection of PVC pipes for rainwater drainage on highways

• valve

We would like to introduce the "Pinch Valve (Manual Type)" handled by Hachiken. This valve applies a very simple principle of stopping fluid by pinching a rubber tube, making it suitable for piping slurries, which is difficult with mechanical valves. If damaged, only the rubber sleeve can be replaced. Our company is capable of accommodating various special specifications. Please feel free to contact us when needed. 【Features】 ■ Applies a very simple principle of stopping fluid by pinching a rubber tube ■ Usable for piping slurries, which is difficult with mechanical valves ■ Only the rubber sleeve can be replaced if damaged *For more details, please refer to the PDF document or feel free to contact us.

• valve

The "rubber joint" is made of organic materials such as rubber and synthetic fibers, so it has a limited lifespan. Additionally, its lifespan can vary significantly depending on the usage conditions. By downloading the PDF document, you can view the "Service Life Coefficient Table" and the "Pressure Unit Conversion Table." Please use these to estimate the expected service life based on your usage conditions, as a guideline for regular inspections and replacement timing. The standard service life is set for fluids that are water. *For more details, please refer to the PDF document or feel free to contact us.*

• joint

Hachiken is a specialized manufacturer of rubber joints for piping, producing all products domestically. We would like to introduce examples of our custom products. The "Pipe Seal Rubber Bag" inflates within the piping to seal fluids. It is available in the standard size of φ300×400L. Our company is capable of accommodating various special specifications. Please feel free to consult us about anything. 【Production Examples】 ■ Pipe Seal Rubber Bag ■ Inflates within the piping to seal fluids ■ φ300×400L *For more details, please refer to the PDF document or feel free to contact us.

• Rubber

Our "Rubber-coated fabric products (bags)" are made by hand-laminating vulcanized rubber fabric with an approximate thickness of 1mm. Large products can be designed and manufactured freely without the use of molds. We can produce items such as "anti-collapse bags" that secure cargo with air-filled rubber bags, and "pipe seal bags" that inflate rubber balloons inserted into pipes to stop fluids. 【Examples of products】 ■ Anti-collapse bags ■ Diaphragms for tanks ■ Pipe seal bags ■ Air jacks ■ Liquid storage tanks *For more details, please refer to the PDF materials or feel free to contact us.

• Rubber
• others

Hachiken is a specialized manufacturer of rubber joints for piping, producing all products domestically. We would like to introduce some examples of our custom products. We have manufactured a "transparent silicone tube" with a diameter of φ165×200 and a "left and right different standard flange flex" of 65A×200. Our company is capable of accommodating various special specifications. Please feel free to consult us about anything. 【Production Examples】 ■ Transparent Silicone Tube: φ165×200 ■ Left and Right Different Standard Flange Flex: 65A×200 *For more details, please refer to the PDF document or feel free to contact us.

• joint

Hachiken is a specialized manufacturer of rubber joints for piping, producing all products domestically. We would like to introduce examples of our custom-made products. Endless belts manufactured using a mandrel, such as paper feeding belts for diazo copiers. The characteristic feature is that there are no joints due to the integral vulcanization molding. Our company is capable of accommodating various special specifications. Please feel free to consult us about anything. [Features] - Endless belts manufactured using a mandrel - No joints *For more details, please refer to the PDF document or feel free to contact us.

• belt

Hachiken is a specialized manufacturer of rubber joints for piping, producing all products domestically. We would like to introduce examples of our custom products. We have manufactured square ducts in "black CR," "white CR," and "silicone" specifications. These are used for connecting exhaust ducts such as deodorizing devices. Our company is capable of accommodating various special specifications. Please feel free to consult us about anything. 【Production Examples】 ■ Black CR ■ White CR ■ Silicone *For more details, please refer to the PDF materials or feel free to contact us.

• Ventilation and Exhaust
• air conditioning

Hachiken is a specialized manufacturer of rubber joints for piping, producing all products domestically. We would like to introduce some examples of our custom products. We have manufactured "heat-resistant silicone" with a diameter of φ500, "CR with inner tube" with a diameter of φ350, and "white CR" with a diameter of φ300. Our company is capable of accommodating various special specifications. Please feel free to consult us about anything. 【Production Examples】 ■ Heat-resistant silicone: φ500 ■ CR with inner tube: φ350 ■ White CR: φ300 *For more details, please refer to the PDF materials or feel free to contact us.

• Wiring materials

Hachiken is a specialized manufacturer of rubber joints for piping, producing all products domestically. We would like to introduce some examples of our custom products. The "silicone joint with inner tube" is used to protect the rubber joint when the fluid has wear characteristics. Additionally, we have also produced "flexible joints with handles." Our company is capable of accommodating various special specifications. Please feel free to consult us about anything. 【Production Examples】 ■ Silicone joint with inner tube: 250A×500L ■ Flexible joint with handle: 50A×300L *For more details, please refer to the PDF materials or feel free to contact us.

• Piping Materials

The "Q Series" is a rubber joint for high-temperature air, composed of silicone rubber and heat-resistant fibers. It includes a lineup of products such as the flexible "F type," expansion "E type," bend "B type," and reducer "R type." These products are designed to absorb vibrations, noise, and displacements in lines carrying high-temperature air, and can be used in piping for high-pressure blowers and drying lines for food products. 【Partial Lineup】 ■ Flexible "F type" ■ Expansion "E type" ■ Bend "B type" ■ Reducer "R type" ■ Bellows "J type" *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "K Series L Type" is a flexible pipe designed with low reaction force. Compared to standard flexible pipes, it has a smaller reaction force during displacement, making it less likely to damage the piping. We offer the "KL100" for 100mm eccentric use (above ground and buried) with 3 ridges, and the "KL200" for 200mm eccentric use (above ground and buried) with 4 ridges, which can be used for connecting resin pipes such as PVC. 【Product Lineup】 ■ KL100: 100mm eccentric use (above ground and buried) with 3 ridges ■ KL200: 200mm eccentric use (above ground and buried) with 4 ridges *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials

The "K Series H Type" is a high-displacement absorbing rubber joint that protects piping from uneven settlement due to earthquakes or weak ground, as well as expansion and contraction due to temperature changes. We offer "KH300" for 300mm eccentricity and "KH400" for 400mm eccentricity. It can be used for connections between buildings with different foundations, piping within treatment plants, underground piping on public roads, and piping inside buildings. 【Product Lineup】 ■ KH300: For 300mm eccentricity ■ KH400: For 400mm eccentricity *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials

The "H Series S Type" is a commonly used push-in type rubber hose. Installation to piping is simply done by pushing it in and tightening with a hose clamp. It is reinforced with wire, making it suitable for use not only in positive pressure lines but also in vacuum lines. 【Features】 ■ Commonly used push-in type rubber hose ■ Installation to piping is simply done by pushing it in and tightening with a hose clamp ■ Reinforced with wire ■ Usable in both positive pressure and vacuum lines *For more details, please refer to the PDF document or feel free to contact us.

• hose

The "H Series R Type" is a multipurpose rubber pipe used for pipe connections and protective covers for pipes, among other applications. It can be used for various purposes, including forklift fork covers, covers for cylindrical products like roll cores, simple pinch valves, and simple fender materials. Since everything is custom-made, please specify your desired dimensions, configuration, and materials. 【Features】 ■ Multipurpose rubber pipe ■ All custom-made *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "H Series C Type" is a transparent silicone rubber sleeve for connecting piping related to high temperatures and food. Since the body is transparent, it is possible to confirm the presence or absence of internal fluid. It can be manufactured in large diameters, which was previously difficult. 【Features】 ■ Transparent silicone rubber sleeve for connecting piping related to high temperatures and food ■ The transparent body allows for confirmation of the presence or absence of internal fluid (If it has a reinforcing layer, it will be translucent) ■ Can be manufactured in large diameters, which was previously difficult *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "F Series S Type" is a very soft type of rubber joint that does not contain wire in the main body, allowing it to be easily compressed by hand. The flange comes standard with molten zinc plating, and the inner diameter of the mouth for sizes 25A and below is processed with an R shape. This product is designed for connecting piping in areas where frequent disassembly is required, as well as for situations where contents may become clogged inside the piping and need to be knocked loose from the outside. It can be used in general factory equipment piping. [Purpose] ■ Connecting piping in areas where frequent disassembly is required ■ Knocking loose contents that have become clogged inside the piping from the outside ■ Temporarily displacing significantly *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "F Series R Type" is a rubber joint for absorbing vibrations and displacements that connects pipes of different diameters. It can be used in chemical plants, flue gas desulfurization plants, wastewater treatment plants, and pump/blower piping. The flanges are standardly hot-dip galvanized, and R processing is applied to the inner diameter of the mouth for sizes 25A and below. 【Standard Specifications】 ■ Maximum Operating Temperature: -10℃ to 60℃ ■ Maximum Operating Pressure: -50kPa to 0.50MPa ■ Flange Standard: JIS 10K ■ Inner Rubber Material: EPDM *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "F Series B Type" is a rubber joint for vibration and sound insulation, as well as displacement absorption in piping bends. The maximum operating temperature is -10°C to 60°C, and the maximum operating pressure is -50 kPa to 0.50 MPa. It can be used not only for internal pressure lines but also for negative pressure lines due to its wire reinforcement. 【Standard Specifications】 ■ Maximum Operating Temperature: -10°C to 60°C ■ Maximum Operating Pressure: -50 kPa to 0.50 MPa ■ Flange Standard: JIS 10K ■ Inner Rubber Material: EPDM *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "F Series Type A" is a chemical-resistant rubber joint lined with fluororesin on the inside. It excels in heat resistance, cold resistance, non-stick properties, and vibration damping. It can be used for high-temperature hot water piping, food piping, various chemical piping, ultra-pure water piping, and hot spring piping applications. 【Features】 ■ Chemical resistance ■ Heat resistance ■ Cold resistance ■ Non-stick properties ■ Vibration damping *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "E Series S Type" is a plug-in type expansion joint. It can be used for applications such as connecting rainwater pipes and ducts. The inner rubber material is made of EPDM, and options for CR, NBR, NR, and wear resistance are also available. 【Standard Specifications】 ■ Maximum operating temperature: -10℃ to 60℃ ■ Inner rubber material: EPDM ■ Inner rubber material (options): CR, NBR, NR, wear resistance *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "E Series L Type" is an expansion joint designed with low reaction force. It is a product aimed at vibration and noise reduction, as well as absorbing misalignment in piping made of materials with low strength, such as PVC and FRP, and it has a smaller reaction force during displacement compared to standard expansions (EA). The maximum operating temperature is -10°C to 60°C, and it uses EPDM for the inner rubber material, making it suitable for connecting resin pipes like PVC. [Purpose] ■ Vibration and noise reduction, as well as absorbing misalignment in piping made of materials with low strength, such as PVC and FRP. *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "E Series K Type" is a high-pressure expansion joint designed for a maximum operating pressure of 2.0 MPa. It uses EPDM for the inner rubber material and conforms to JIS 20K flange standards. This product is intended to absorb the expansion and contraction of piping due to temperature changes and to reduce vibration and noise from rotating equipment such as pumps. It can be used for connections in air conditioning piping for high-rise buildings as well as for connections in dewatered sludge piping. [Purpose] - Absorption of expansion and contraction of piping due to temperature changes - Vibration and noise reduction for rotating equipment such as pumps *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "E Series A Type" is a multipurpose rubber joint that absorbs expansion, contraction, and eccentricity due to the temperature of the piping, thanks to its arch structure. Because the axial reaction force is small, installation onto the piping is particularly easy. Additionally, the arch structure of the main body allows for a large amount of displacement. [Types] ■ EA1: 1-arch type (for internal pressure and vacuum) ■ EA2: 2-arch type (for internal pressure and vacuum) *For more details, please download the PDF or contact us.

• Other machine elements

The "F Series G Type" is a standard spherical flexible joint for vibration-damping around pumps. Despite its short face-to-face dimensions, it achieves significant vibration-damping effects. It is suitable for applications such as building service piping, HVAC sanitary piping, and marine piping. 【Features】 ■ The spherical shape provides stability against internal pressure and allows for use in both delivery and suction applications due to its resistance to negative pressure. ■ The spherical design results in minimal dimensional changes under pressure compared to other types of joints. *For more details, please download the PDF or contact us.

• joint

The "H Series F Type" is a hose with flanges attached at both ends, designed with a special structure that provides flexibility. It can be used not only for internal pressure but also for vacuum lines due to its wire reinforcement. 【Features】 ■ High flexibility ■ Versatile performance *For more details, please download the PDF or contact us.

• hose

The "J Series S Type" is a highly flexible flange-type joint. Thanks to its special structure, it offers high flexibility and allows for significant eccentricity with a short face-to-face dimension. It is suitable for connecting rainwater pipes, blower pipes, and piping that requires frequent installation and removal. 【Features】 ■ High flexibility ■ Large eccentricity *For more details, please download the PDF or contact us.

• joint

The "H Series P Type" is an ultra-flexible hose used for connecting low-pressure piping, featuring corrugated processing on both the inner and outer surfaces, which provides exceptional flexibility. Additionally, it is reinforced with wire, allowing it to be used not only for internal pressure but also for vacuum lines. 【Purpose】 ■ Complex 3D piping connections ■ Connections for piping with significant movement *For more details, please download the PDF or contact us.

• hose

The "J Series J Type" is a bellows-type rubber joint used in areas where large expansion and contraction are required under low pressure. Among various rubber joints, it is a product with significantly low axial reaction force. Please feel free to contact us if you have any requests. 【Features】 ■ Due to its bellows structure, the axial compression reaction force is very small. ■ Unlike general bellows, it has no sewing processing, ensuring high airtightness. *For more details, please download the PDF or contact us.

• Pipe Fittings
• Piping Materials
• joint

The "K Series S Type" is a flexible pipe of a straight pipe type with a unique design. It protects the piping from displacements caused by earthquakes and uneven settlement. Additionally, the steel wire inserted in a spiral shape provides high pressure resistance and cross-sectional area retention capability. 【Features】 - Very simple structure without an arch design, maintaining high reliability - High pressure resistance and cross-sectional area retention capability due to the spiral-inserted steel wire inside - Significant cost advantages due to the simple structure *For more details, please download the PDF or contact us.

• Piping Materials

The flexible pipe joint "KA" is a high-displacement absorption rubber joint that protects piping from uneven settlement caused by earthquakes and weak ground, as well as expansion and contraction due to temperature changes. The main body is reinforced with strong synthetic fibers and steel wires, providing excellent pressure resistance. Additionally, it is covered with a special synthetic rubber that has outstanding weather resistance, allowing it to withstand long-term use. The internal arch structure effectively absorbs uneven settlement that occurs when connecting pipes between buildings with different foundations. The short spacing dimensions also increase design flexibility. 【Features】 ■ High pressure resistance ■ Large eccentricity ■ Long-term durability *For more details, please download the PDF or feel free to contact us.

• joint
• Rubber