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Flap gate Product List

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Flap Gate (Band Type) "F9 Model"

Flap Gate (Band Type) "F9 Model"

Directly attachable to existing pipes with a band! Simple backflow prevention door.

The flap gate (band type) "F9 model" prevents external water from backflowing during floods or when full. It pursues a simple structure, achieving lightweight and significant economic efficiency improvements. The arm is supported at two points, allowing for smooth opening and closing, enhancing water tightness. It has few protrusions, minimizing debris adhesion. Installation involves wrapping and securing it with a band around existing pipes (some pipe types may not be compatible). 【Features】 ○ Direct installation on pipes possible (VU/VP/HP/SUS pipes/SGP pipes, etc.) ○ High corrosion resistance ○ Aluminum version has anti-corrosion coating For more details, please contact us or download the catalog.

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Harbor flap gates (round type and square type) "F8HM type and F8HK type"

Harbor flap gates (round type and square type) "F8HM type and F8HK type"

Prevents backflow of external water during high tide! Stainless steel flap gate.

The "F8 type" flap gate (round and square) for harbors prevents external water from backflowing during storm surges. It features a double hinge design that ensures high water tightness and smooth opening and closing. The door and stops are made of SUS323L (equivalent to SUS316L), which is particularly resistant to seawater. The allowable wave height is equivalent to 6.0m (equivalent to a water depth of 30m). It comes with all-anchor theft prevention nuts (in two locations). 【Features】 ○ Double hinge design ○ Resistant to seawater ○ Easy installation For more details, please contact us or download the catalog.

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Stainless steel flap gate "F4 type, F5 type"

Stainless steel flap gate "F4 type, F5 type"

Prevents backflow of external water during floods and high tides! Stainless steel flap gate.

The "F4 type" and "F5 type" are stainless steel flap gates designed to prevent backflow of external water during floods or high tides. They excel in corrosion resistance and waterproofing, and achieve high pressure resistance by having a spherical surface. The arms are supported at two points, allowing for smooth opening and closing, which enhances water tightness. With minimal protrusions, they effectively prevent debris accumulation. The "F4 type" is wall-mounted (all-anchor type), while the "F5 type" is band-fixed. 【Features】 ○ High corrosion resistance and waterproofing ○ Direct attachment to pipes possible (F5 type only) ○ Allowable water depth: within 3.5m to 5.0m For more details, please contact us or download the catalog.

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Automatic opening and closing gate - Hume flap

Automatic opening and closing gate - Hume flap

Just fit it and tighten it firmly. Yamato's unmanned, non-powered fume flap.

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 open and close automatically 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, and using drainage pumps. Our company has focused on this aspect and developed the Daiwa-style automatic drainage device, known as the Hume Wrap, which can be installed simply by fitting it onto the end of a Hume pipe and tightening bolts, significantly reducing construction costs and achieving thorough rationalization.

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Automatic opening and closing gate, anchor-type fume flap.

Automatic opening and closing gate, anchor-type fume flap.

Just secured with anchor bolts. Yamato's anchor-type hume flap.

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 open and close automatically 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.

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