多久製作所 List of Products and Services

The "TSJ Type Taskal Joint" is a connection fitting for medium diameter pipes that allows for one-touch connections as an alternative to flange connections. Due to its small outer diameter and compact design, it enables smaller holes for wall and floor penetrations, making insulation work more compact as well. Additionally, its lightweight nature improves efficiency in transportation and piping work. Moreover, it does not require tools such as impact wrenches and does not use bolts, eliminating the need for torque management and re-tightening. 【Features】 ■ Easy connection significantly reduces piping work time ■ Compact and lightweight design ■ No tools required for operation ■ Easy confirmation of joint locking ■ Usable over a wide range from low to high pressure ■ The packing is made of chlorine-resistant EPDM, ensuring excellent durability *For more details, please refer to the PDF document or feel free to contact us.

• Water and sewerage pipe fittings
• Fittings

"NC-11" is coated on the inner and outer surfaces of steel pipes using a fluidized immersion method with powder nylon-11, including the bolt holes, resulting in a complete coating. It is odorless and non-toxic, ensuring hygiene. It has passed the WSP leaching performance test, preventing the occurrence of red water or cloudy water. The operating temperature ranges from -25°C to +60°C, exhibiting excellent water and seawater resistance, and boasts long-lasting corrosion resistance. 【Features】 ■ Coating with a nylon film that has no pinholes ■ Coating thickness of 0.3mm or more ■ Coating adhesion ■ Odorless and non-toxic ■ Tough coating *For more details, please refer to the PDF document or feel free to contact us.

• Piping materials (plastic pipes)
• Piping and insulation
• Water and sewerage pipe fittings

The construction method responds effectively to the current needs for environmental protection, construction site conditions, working environments, safety, and cost awareness. By not bringing in materials and equipment, it reduces noise and smoke generated from on-site work. It also addresses the reduction of waste materials such as scrap and packaging. Additionally, it allows for management of work processes according to the construction schedule, enabling appropriate personnel allocation in line with product delivery dates. 【Features】 ■ Environmental conservation ■ Safety measures ■ Reduced number of entrants ■ Cost reduction ■ Shortened construction period ■ Improved quality *For more details, please refer to the PDF materials or feel free to contact us.

• Special Construction Method
• Piping and insulation
• Water and sewerage pipe fittings

"TAK-PEL" is a versatile polyethylene powder lining steel pipe among many plastics. Utilizing its chemical stability, physical properties, and ease of processing, it is used as a new corrosion-resistant steel pipe for transporting various fluids. We recommend this product as a corrosion-resistant steel pipe that can contribute to quality and economic aspects as a piping material. 【Features】 ■ Stable adhesion is ensured by the use of specially formulated polyethylene powder. ■ Thick lining coating with minimal unevenness and uniformity. ■ No cracks or stress fractures. ■ No occurrence of corrosion or rust. ■ The physical properties of polyethylene are not compromised. *For more details, please refer to the PDF document or feel free to contact us.

• Piping materials (plastic pipes)
• Piping and insulation

The "Multi-Unit" is a revolutionary unit system that achieves hundreds of system variations by combining ten types of basic systems. We propose suitable construction methods based on conceptual plans for building equipment, water supply and drainage, and various plants. Our company delivers products developed based on the know-how accumulated in shipbuilding and plants, including seismic design, fluid dynamics, and structural mechanics to many users. 【Features】 ■ On-site, simply arrange the units and connect the pipes ■ Achieved a prefabrication rate of 97.6% for units in large machinery rooms ■ Delivered on specified dates like a courier service ■ Expands into hundreds of variations from ten basic patterns ■ Provides innovative ideas that are hard to conceive with conventional methods *For more details, please refer to the PDF materials or feel free to contact us.

• Unit Products
• Other interior and exterior systems and units
• Unit and other construction

This catalog features the copper pipe fittings for air conditioning, 'TAK-N'. Newly added to the lineup for refrigerant piping and refrigeration piping applications. These products are compatible with the refrigerant gas pressures of "R410A, R32, etc." We also introduce packaging units, styles, and joining materials. Please use this information for product selection. 【Contents】 ■ Dimensions of the joint (female end) ■ Types ■ Joining materials ■ Construction precautions *For more details, please refer to the PDF document or feel free to contact us.

• Fittings
• Piping Equipment

"TAK-LP" is a rigid polyvinyl chloride lined steel pipe that has excellent characteristics in terms of workability on site, corrosion resistance, and mechanical strength. The surface of the rigid polyvinyl chloride is smooth and has a low friction coefficient, making it suitable for drainage piping. The inner surface uses pipes formed by an extruder, eliminating concerns about pinholes. It is more economical compared to other lined steel pipes such as rubber lining and glass lining. 【Features】 ■ High mechanical strength ■ Excellent corrosion resistance, chemical resistance, and oil resistance ■ Low friction coefficient ■ No pinholes ■ Lower cost than other lined steel pipes *For more details, please refer to the PDF document or feel free to contact us.

• Piping materials (copper pipes, cast iron pipes)
• Piping materials (plastic pipes)
• Piping and insulation

The "water pipe bridge" is a product that uses steel pipes as water channels in its bridge components to continuously deliver the blessings of water across deep valleys and rivers. Nylon 11 is established as the Japan Water Supply Steel Pipe Association standard WSP-067, and it is non-toxic and odorless, preventing the occurrence of red water or brownish water. Additionally, it has a wide temperature range of -25°C to +60°C and excellent durability against repeated thermal cycling, allowing for safe use. Our company manages everything from design to nylon coating processing and assembly in a consistent management system. 【Features】 ■ Hygienic ■ Excellent corrosion and weather resistance ■ Economical ■ Strong coating adhesion that prevents peeling even under harsh conditions ■ Available in three colors: gray, white, and blue *For more details, please refer to the PDF materials or feel free to contact us.

• Bridge Construction
• Water and sewerage pipe fittings

Doko Manufacturing is a specialized manufacturer of copper pipe fittings, uniquely developed through plastic processing technology. Our "copper pipe fittings" are products certified by the Japan Industrial Standards (JIS), inspected by the Japan Water Works Association (JWWA), and recognized by the Japan Copper Center (JCDA), widely used domestically due to advanced plastic processing technology and quality control. These products are made using our unique hydraulic bulging method, which is at the forefront of plastic processing technology, offering the advantage of withstanding high internal pressure. 【Features】 ■ Antibacterial properties ■ Earthquake resistance ■ Freeze resistance ■ Cost-effectiveness ■ Recyclability *For more details, please refer to the PDF materials or feel free to contact us.

• Fittings
• Piping materials (copper pipes, cast iron pipes)
• Water and sewerage pipe fittings

"TAK-LP" is a product that features excellent characteristics such as workability, corrosion resistance, and mechanical strength as a flanged rigid PVC lined steel pipe. Since the rigid PVC pipe is bonded as a lining to the inner surface of the steel pipe, it possesses mechanical strength that cannot be expected from rigid PVC pipes alone. It is also stable against chemicals, making it suitable for use in plant piping. 【Features】 ■ High mechanical strength ■ Excellent corrosion resistance, chemical resistance, and oil resistance ■ Low friction coefficient ■ No pinholes ■ Lower cost compared to other lined steel pipes *For more details, please download the PDF or feel free to contact us.

• Piping materials (copper pipes, cast iron pipes)
• Piping and insulation