大和エンジニヤリング List of Products and Services

We handle "Anchor-type flap gates for backflow prevention and tide control." Double hinges are used in the hinge section, and P-type rubber is adopted in the watertight section to enhance water tightness. We offer two types: aluminum alloy and stainless steel, which can be used for backflow prevention at various drainage outlets from rivers to sewage systems and ports. 【Features】 ■ Suitable for tidal work ■ Easy installation ■ Excellent water tightness ■ Material can be selected according to application ■ Double hinges adopted ■ Automatically opens and closes with water level difference *For more details, please refer to the PDF document or feel free to contact us.

• Watergate

The "flap gate for pressure pipes" is a cost-saving flap gate that can be installed simply by fitting it into the end of a pressure pipe and tightening bolts. Utilizing the track record of the Hume flap gates that have been sold by Yamato Engineering, we have prepared a flap gate for pressure pipes that serves as an automatic drainage device, which can be easily installed without the need for civil engineering work. 【Features】 ○ Excellent water tightness - No need for a stop device - A special-shaped rubber tightly adheres to the thick wall of the pressure pipe, preventing backflow - The key point for reducing construction costs ○ Consideration for corrosion resistance - To improve corrosion resistance, the material is made solely of stainless steel For more details, please contact us or download the catalog.

• Watergate

We have developed an anchor-type flume flap (automatic drainage device) that can be installed without the need for civil engineering work at existing drainage outlets. Yamato Engineering offers two types of flap gates made from aluminum alloy and stainless steel. They can be used for backflow prevention at all types of drainage outlets, from rivers to sewers and ports. 【Features】 ○ No watertight door stop device required - The structure prevents backflow with a watertight rubber attached to the anchor plate. ○ Corrosion resistance is a priority - Available in two materials: steel (SS) and stainless steel (SUS). ○ Products are delivered promptly - Arrives within one week of your order. For more details, please contact us or download the catalog.

• Watergate

To prevent backflow from rivers during water discharge, various gates are installed at drainage outlets. It is common to install flap gates that automatically open and close based on the difference in water levels inside and outside for small drainage outlets. In such cases, ancillary work such as concrete pouring, water replacement using drainage pumps, and temporary closures is required for installation. Yamato Engineering has focused on this aspect and developed a cost-saving type of Hume flap (automatic drainage device) that can be installed simply by inserting it into the end of a Hume pipe and tightening bolts. 【Features】 ○ No need for a watertight stop device - The structure prevents backflow by having a specially shaped rubber closely adhere to the thick wall of the Hume pipe. ○ Attention to corrosion resistance - There are two types of materials: steel (SS) and stainless steel (SUS). ○ Products are delivered promptly - They will arrive at your location within one week of your order. For more details, please contact us or download the catalog.

• Watergate

To prevent backflow from rivers into drainage ditches during water discharge, various gates are installed at these drainage outlets. Among them, it is common for small drainage outlets to have flap gates that open and close automatically based on the difference in water levels inside and outside. Yamato Engineering offers flap gates in two types: aluminum alloy and stainless steel. They can be used for backflow prevention at all drainage outlets, from rivers to sewage systems and ports. 【Features】 ○ Excellent water tightness ○ Consideration for aesthetics ○ Doors available in aluminum alloy and stainless steel For more details, please contact us or download the catalog.

• Watergate

"Do you have such issues?" ◆ Conventional door stop welding fixation products require installation of door stop hardware by specialized contractors... ◆ Despite being a tidal work, the processes, labor, and costs for installing door frames after the secondary concrete formwork, pouring, and curing are burdensome... ⇒ Solve such issues with the port-type flume flap! We have developed the port-type flume flap as an automatic drainage device that can be easily installed without civil engineering work for both new and existing drainage outlets! 【Features】 ■ Structure without beams reduces the impact of waves! Difficult to sway ■ Eliminates installation bolts, improving loosening failures ■ Shortens construction time! Just secure it with the included driven anchor bolts ■ Prevents backflow during high tide ■ Sturdy design! Considers wave pressure (equivalent to a water depth of 25m) ■ Easy installation reduces construction costs *For more details, please refer to the PDF document or feel free to contact us.

• Tunnel construction
• Airport facilities
• River construction

To prevent backflow from rivers into drainage ditches during water discharge, various gates are installed at the drainage outlets. Among these, it is common for small drainage outlets to have flap gates that automatically open and close based on the difference in water levels inside and outside. In this case, although the gate itself is quite small, the construction involves significant ancillary work such as pouring the necessary concrete for installation, and sometimes temporary closures or the use of drainage pumps. Our company has focused on this issue and developed this anchor-type hume flap as an automatic drainage device that can be installed at existing drainage outlets without the need for civil engineering work.

• Tunnel construction
• Airport facilities
• River construction

To prevent backflow from rivers into drainage ditches during water discharge, various gates are installed at the drainage outlets. Among these, it is common for small drainage outlets to have flap gates that automatically open and close based on the difference in water levels inside and outside. In this case, although the gate itself is quite small, the construction involves significant additional work, such as pouring the necessary concrete for installation, sometimes creating temporary closures for this purpose, and using drainage pumps. Our company has focused on this aspect and developed the Daiwa-style automatic drainage device, the Hume Wrap, which can be installed simply by inserting it into the end of a Hume pipe and tightening bolts, significantly reducing construction costs and achieving thorough rationalization.

• Tunnel construction
• Airport facilities
• River construction