清水鐵工所 List of Products and Services

This product is an emergency release and forced water discharge valve equipped with a completely power-free earthquake detection device. It is installed in the outflow pipe of a reservoir or the branching connection pipe, and it operates automatically in response to an earthquake, enhancing the safety of the reservoir and preventing secondary disasters from the outflow of stored water. Additionally, it features a reset mechanism that allows for easy restoration with a single action, which can be restored in conjunction with the operation of the reduction gear handle to return to a locked state. 【Features】 ■ Valve body: Butterfly valve (JWWA B 138 standard valve) ■ Mechanical earthquake detection device (catfish) operates without power ■ Can be equipped with both manual and electric operation ■ Normally keeps the valve fully open and releases the lock in emergencies ■ Contains a spring inside the cylinder that operates in the opening direction after unlocking *For more details, please refer to the PDF document or feel free to contact us.

• Drainage and ventilation equipment
• Flood prevention facilities, fire tanks, and flood control ponds
• Disaster prevention supplies

The "Drawbar D+law type" is an emergency shut-off valve installed in the outflow pipes of water reservoirs or storage tanks, or in the branch connection pipes of pipelines. In the event of an earthquake or pipeline accident, it detects abnormalities without power and reliably performs an emergency shut-off. It functions effectively in preventing the outflow of stored water from reservoirs, particularly in water supply management during disasters. Additionally, changing the valve operation conditions based on "earthquake detection" and "flow velocity detection" (AND/OR) is easy, allowing for flexible adaptation to customer operational conditions. 【Features】 ■ Lock release mechanism ■ Web monitoring device ■ Compact height ■ Compatible with electric reset ■ Complete sealing of valve seat *For more details, please refer to the PDF document or feel free to contact us.

• Drainage and ventilation equipment
• Flood prevention facilities, fire tanks, and flood control ponds
• Disaster prevention supplies

The "SS-CV type" is a balanced swing check valve that achieves reduced pressure loss and supports high efficiency and energy saving. In the piping for sewage aeration blowers (fans), which are an essential part of plant facilities for reducing greenhouse gases, it achieves a pressure reduction of over 60% compared to our conventional products. Additionally, it is equipped with a cylinder device that significantly reduces the pressure loss caused by the valve body. 【Features】 ■ Reduction of pressure loss ■ Reliable check operation during blower stop and pressure holding state ■ Easy adjustment of counterweights ■ Torque reduction through the incorporation of bearings in movable parts *For more details, please download the PDF or feel free to contact us.

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