大和鉄工所 List of Products and Services

The "SA type" is a safety valve that allows for easy pressure adjustment, is highly durable, and has a long lifespan. Rough pressure adjustments can be made using the gauge. Additionally, fine pressure adjustments can be made with a pressure gauge. Important parts such as the valve body and valve seat are made of corrosion-resistant stainless steel. 【Features】 ■ Rough pressure adjustments can be made using the gauge ■ Fine pressure adjustments can be made with a pressure gauge ■ Important parts such as the valve body and valve seat are made of corrosion-resistant stainless steel *For more details, please refer to the PDF document or feel free to contact us.

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The "RB-QM type" is an automatic secondary pressure regulating valve that utilizes the water pressure on the inflow (primary) side and outflow (secondary) side to quickly respond to fluctuations in primary side pressure and changes in secondary side water volume, operating smoothly and gently while maintaining a stable set water pressure on the secondary side. This method is carried out through differential pressure control of the main valve's piston, allowing the secondary side water pressure to be easily set to any desired pressure within the range of reduced pressure by adjusting the pilot valve. 【Features】 ■ Developed specifically for small-scale water supply systems ■ Double function of main and auxiliary valves ■ Operates solely on water pressure ■ Prevents water hammer ■ Easily adjustable outflow side water pressure on-site *For more details, please refer to the PDF document or feel free to contact us.

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The "RBH type/RBH-QM type" completely renews both the main unit and peripheral devices, achieving stable operation across a wide range from maximum to minimal water flow. It demonstrates excellent stability performance not only in parallel operation but also in series operation, making it a regular auto valve. This product supports various control functions, including a "constant flow valve" that maintains a steady flow rate and a "primary side pressure holding valve" that prevents a drop in primary side pressure caused by excessive flow on the secondary side. 【Features】 ■ Supports various control functions ■ Low secondary side pressure at night and high secondary side pressure during the day (two-stage pressure reducing valve) ■ Maintains constant secondary side pressure (pressure reducing valve) ■ Opens and closes based on water level in the tank (water level adjustment valve) ■ Maintains a constant flow rate (constant flow valve) *For more details, please refer to the PDF document or feel free to contact us.

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The "LD/LD-W type" is a gear-type butterfly float valve made of stainless steel, making it resistant to corrosion and suitable for preventing red rust. The movement of the butterfly valve body (90-degree motion) is fully closed and fully opened through lever amplitude (45-degree motion) due to the gear ratio. Additionally, due to its butterfly structure, the flow cross-section ratio is very low relative to the opening degree, and the valve body gradually narrows to stop the flow, preventing water hammer. 【Features】 ■ High durability ■ Complete shut-off effect ■ Water hammer prevention ■ Easy foreign matter removal ■ Installable without being restricted by the inflow pipe ■ Easy replacement of valve packing *For more details, please refer to the PDF document or feel free to contact us.

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The "EA-R type/EA-S type" is a freely designed telescopic slider (within the stroke range) that allows for customizable span dimensions and extension amounts (the EA-R type can only customize span dimensions). Additionally, it features a safety design with an anti-detachment function. Made entirely of stainless steel, it is fully rust-resistant and lightweight. Not only does it have telescoping capabilities, but it also includes a bending function (approximately 2 degrees), providing ample performance. 【Features】 ■ Safety design ■ Compact design ■ Bending function ■ All stainless steel *For more details, please refer to the PDF document or feel free to contact us.

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The "Air Magic Valve (Constant Water Level Valve AM Type)" automatically opens and closes with pneumatic operation, allowing for stable water supply. When supplying water to receiving tanks or storage tanks, it automatically opens and closes, stopping the flow at the high water level (H.W.L.) and opening at the low water level (L.W.L.), creating a water level difference for stopping. This is a groundbreaking product developed with a new concept. 【Features】 ■ Easy installation and inspection ■ Stable water supply with pilot operation ■ No need for parts replacement for a long time ■ No adjustment required due to variations in operating water pressure ■ Advantageous durability ■ Easy to change the height and position of the shut-off level *For more details, please refer to the PDF materials or feel free to contact us.

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• Piping materials (copper pipes, cast iron pipes)

This catalog features steel items from Daiwa Iron Works Co., Ltd. We introduce products such as the "manhole cover" with a double lock mechanism, and the "water intake screen" and "ventilation tower," which thoroughly simplify water source maintenance management and enable stable water supply. We have a rich lineup available. 【Contents】 ■ Manhole Covers ■ Water Intake Screens ■ Ventilation Towers ■ Product Examples *For more details, please refer to the PDF document or feel free to contact us.

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The "LC type" is an automatic water level control valve that utilizes the pressure of the fluid itself to open and close the piston valve through the operation of a pilot valve. The piston valve, cylinder, and seat are made of stainless steel, which provides high wear resistance and corrosion resistance. The outlet of the main valve has a V-port design, allowing for slow opening and closing. Additionally, the opening and closing speed of the piston valve can be controlled by a needle valve. 【Features】 ■ Operates using the pressure of the fluid ■ Prevents water hammer ■ Key components are made entirely of stainless steel ■ The movement of the valve is easily visible ■ Manual operation for opening and closing or flow adjustment is possible *For more details, please refer to the PDF document or feel free to contact us.

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Daiwa Iron Works Co., Ltd. is a dedicated manufacturer of water supply construction in social and agricultural infrastructure projects, as well as special valves for agricultural and industrial water use. We manufacture a variety of special valves and fabricated hardware, including "pressure reducing valves," "automatic blow-off valves for pumps," and "stainless steel wraps." For special valves, please leave it to us. 【Manufactured Products】 ■ Pressure Reducing Valves ■ Strainers ■ Expansion Joints ■ Gear Type Butterfly Float Valves ■ Automatic Water Level Control Valves *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment
• Piping materials (copper pipes, cast iron pipes)

This product is a "one-touch water control valve key" made of stainless steel, which excels in corrosion and wear resistance. The connection order of the individual keys is flexible, and the connection and disconnection operations can be done with one touch. It enables quick operation of the water control valve with just one touch. It is lighter than conventional steel models and is a connection and disconnection type, making it easy to carry and can be easily stored in a compact car. 【Features】 ■ Flexible connection order of individual keys ■ One-touch connection and disconnection operation ■ Lighter than conventional steel models ■ Easy to carry and can be easily stored in a compact car ■ Made of stainless steel with excellent corrosion and wear resistance *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment
• Piping materials (copper pipes, cast iron pipes)

The "DRB/DLD series" is a resin concrete valve chamber that significantly shortens construction time due to prefabrication, making it particularly effective for urgent restoration projects. Being made of synthetic resin, it is highly resistant to corrosion and does not depend on the soil conditions of the installation site. Additionally, it excels in freeze-thaw resistance, demonstrating high durability even in cold regions. Its rational thin-walled design allows for compactness, making it ideal for installation in narrow spaces where excavation width is limited, such as on narrow roads or in areas with complex existing pipelines. 【Features】 ■ Can be installed in narrow spaces ■ Sufficient strength to withstand wheel loads ■ Excellent corrosion and freeze-thaw resistance ■ Simplification of foundation work is possible ■ Economical total cost *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment
• Piping materials (copper pipes, cast iron pipes)

The "LC+MO type" is a stainless steel automatic discharge valve for pumps. It gently opens and closes the waterway at the start and stop of water delivery, preventing overload of power and water hammer phenomena. Additionally, in the event of a power outage or pump failure that prevents water delivery, it automatically operates as a check valve and closes the waterway. 【Features】 ■ The opening and closing speed of the valve can be adjusted as desired ■ Operated by a small power solenoid valve ■ Simple structure and maintenance ■ Uses many stainless steel components ■ Excellent durability *For more details, please refer to the PDF materials or feel free to contact us.

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The "UAN-B type / UA-B type" is a strainer with a cleaning port that is installed in areas where foreign substances like sand accumulate, as well as in distribution areas and inflow pipes of water storage tanks, to clean up the water quality within the pipeline. It features a mesh hanging box inside, allowing small debris that passes through the mesh, such as sand, to be reliably discharged outside the pipe by opening and closing the discharge valve as needed. Additionally, larger debris can be removed by raising the hanging axis to take it out from inside the hanging box. 【Features】 ■ The mesh hanging box ensures that small contaminants are reliably discharged outside the pipe. ■ Larger debris can be removed from inside the hanging box. ■ By installing it in areas where foreign substances accumulate or in inflow pipes, water quality is cleaned up. *For more details, please download the PDF or feel free to contact us.

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