興和 List of Products and Services

Wastewater discharged from homes and factories is transported through sewer pipes to treatment facilities, where it is treated and then released into the sea or rivers. Since these sewer pipes are buried underground, they are less affected by external temperatures, resulting in wastewater that is "cold in summer and warm in winter." The thermal energy from the temperature difference between wastewater and outside air is referred to as "wastewater heat," which can be utilized as a heat source for heating, hot water supply, and snow melting, thereby achieving energy-saving effects and reducing CO2 emissions. Although it is stable and abundant, there are still few examples of its implementation, and its promotion is expected to increase with the advancement of decarbonization as a renewable energy source. *For more details, please refer to the PDF materials or feel free to contact us.*

• Piping and insulation

We would like to introduce a case of the "Sewage Heat Utilization Air Conditioning Facility" constructed at the Flower Station "Urarakosudo" in Akihabara, Niigata City. Part of the heating facility using an oil-fired boiler has been updated to this system, aiming for energy conservation. Right next to this facility, there is a φ800mm sewage pipe, and a 50m long heat extraction pipe has been installed at the bottom of the pipe, which serves as the heat source for the water-source heat pump. 【Facility Overview】 ■ Construction Year: 2015 ■ Location: Agricultural Facility "Urarakosudo" ■ Client: Niigata City ■ Contractor: Kowa Co., Ltd. ■ Sewage Pipe: Circular φ800mm (Unrehabilitated Pipe) *For more details, please refer to the PDF document or feel free to contact us.

• Heating and cooling equipment and facilities

We would like to introduce a case of the "Heat Pump-less Snow Melting Facility (Cool Sewage)" constructed on the park sidewalk in Tsurumi Ward, Yokohama City. The feature of this facility is that it is a system that circulates sewage heat without using a heat pump, achieving low running costs. Additionally, by operating it during the summer, it can also be used for cooling pavements and bench handrails, which is why it is referred to as "Cool Sewage." 【Facility Overview】 ■ Construction Year: 2018 ■ Construction Location: "Tsurugamine Machikado Plaza," Tsurumi Ward, Yokohama City ■ Sewage Pipe Diameter: Circular 1500mm ■ Design Snow Melting Heat: 201.2W/m2, Design Hourly Snowfall Depth: 1.95cm/h, Total Design Heat: 4.95kW *For more details, please refer to the PDF document or feel free to contact us.

• Snow melting equipment

We would like to introduce a case of the "sewage heat utilization snow melting system" constructed at the Shinminato Ohashi Bridge in Imizu City, Toyama Prefecture. On the East-West Line of the Fukuki Toyama Port (Shinminato area) coastal road, we installed a non-water-spraying snow melting facility using a water-source heat pump, utilizing the sewage treated water (winter water temperature 16°C) from the nearby Jinzukawa Left Bank Purification Center as the heat source for the steel girder section (Shinminato Ohashi, length 370m). Furthermore, we are sprinkling temperature-adjusted water, which is a mixture of the wastewater from the heat pump and sewage treated water, through snow melting pipes on the PC bridge section and earthworks section (1460m extension on the west side, 1760m extension on the east side). 【Equipment Overview】 ■ Completion: March 2012 ■ Construction Location: Uryu Town to Kaiō Town, Imizu City, Toyama Prefecture ■ Client: Hokuriku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism, Fukuki Toyama Port Office ■ Contractor: Kowa Co., Ltd. *For more details, please refer to the PDF document or feel free to contact us.

• Snow melting equipment

We would like to introduce a case of the "sewage heat heat pipe snow melting facility" constructed at the Niigata City Art Museum bus stop. The feature is that it relies solely on sewage heat for snow melting energy, requiring no electricity at all. It has been tested for spot snow melting at bus stops and similar locations, and the snow melting effect has been confirmed. 【Equipment Overview】 ■ Construction Year: Fiscal Year 2012 ■ Construction Location: Niigata City Art Museum Bus Stop ■ Client: Niigata City ■ Contractor: Kowa Co., Ltd. *For more details, please refer to the PDF document or feel free to contact us.

• Snow melting equipment

We would like to introduce a case of the "pipe-bottom type heat pump snow melting facility" installed as a snow melting facility for the sidewalk area of the Niigata City Hall bus terminal. The central area of Niigata City experiences relatively low snowfall compared to other areas in Niigata Prefecture, which is why the "heat pump snow melting facility" that operates solely on sewer heat has been adopted. Additionally, the operation control is designed to enable energy-saving operation through road temperature sensors and outside air temperature sensors. 【Facility Overview】 ■ Construction Year: FY 2014 ■ Construction Location: Niigata City Hall Bus Terminal ■ Installer: Niigata City Hall ■ Contractor: Kowa Co., Ltd. *For more details, please refer to the PDF document or feel free to contact us.

• Snow melting equipment

We would like to introduce a case study of the installation of a "pipe-bottom type heat pump snow melting facility" at the Niigata Elementary School intersection. This is a simple snow melting system that circulates antifreeze between the sewer pipe and the roadway snow melting section. However, by using materials with high thermal conductivity for the sewer heat extraction pipes and high thermal conductivity concrete for the snow melting pavement, it is designed to efficiently melt snow using only the thermal energy from the sewer. Additionally, this facility was installed as part of a demonstration project by the National Institute for Land and Infrastructure Management of the Ministry of Land, Infrastructure, Transport and Tourism, and the research results have been published as guidelines. 【Facility Overview】 ■ Construction Year: 2018 ■ Location: Niigata Elementary School Intersection ■ Installer: National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism (2018 Innovative Sewer System Demonstration Project (B-DASH Project)) ■ Contractor: Kowa Co., Ltd., Sekisui Chemical Co., Ltd., Niigata City Joint Research Group *For more details, please refer to the PDF materials or feel free to contact us.

• Snow melting equipment

The "Geothermal Energy Catalog" clearly presents various methods, mechanisms, and case studies of geothermal energy utilization developed by Kowa Co., Ltd. Our company has the strength to consistently handle everything in-house, from planning, investigation, design, and construction to after-sales support, allowing us to propose utilization methods suitable for the local geology. Please leave all matters related to geothermal energy to us. [Contents] ■ Our relationship with geothermal energy ■ Forms of geothermal energy utilization *Our case studies ■ Planning, investigation, design ■ Construction and maintenance ■ Our geothermal construction case studies ■ Peripheral equipment and software *For more details, please refer to the PDF materials or feel free to contact us.

• Snow melting equipment
• District heating and cooling/heat source system
• Exterior snow melting equipment

The "Pipe Bottom Installation Type Sewage Heat Exchange Snow Melting System" is a snow melting system that can extract heat and melt snow using only the power of a circulation pump. Polyethylene pipes are laid at the bottom of the sewage pipe to serve as a heat exchanger, and a non-freezing liquid is directly circulated between the heat exchange pipes and the heat radiation panels above ground to melt the snow. It features a simple and energy-efficient system configuration. 【Features】 ■ Heat extraction pipes are arranged at the bottom of the pipe to extract sewage heat ■ Snow melting is possible with just the circulation pump ■ Heat extraction pipes are made of corrosion-resistant resin ■ Simple and energy-efficient system configuration ■ Cooling test operations for pavement can be conducted in summer *For more details, please refer to the PDF materials or feel free to contact us.

• Snow melting equipment

Introducing well strainers that can be used for various purposes such as snow melting, industrial use, water supply, agriculture, and disaster prevention. ● New Well Strainer 'KVS Strainer' 1. Confidence in strength! 2. Environmentally friendly! 3. High water intake capacity! 4. Easy scale removal! 5. Resistant to sand pumping phenomena! 6. Economical and suitable for long-term use! ● Double Casing 'W.KVN Strainer' (Well Repair Material) 1. Convenient internal thread structure for installation! 2. Large water intake capacity! 3. Strong against electrolytic corrosion and economical! We also propose recommended repair methods based on inspection results from dedicated underwater cameras.

• Wells and hot springs
• Other civil engineering works
• Ground improvement

The Network Logger MX is a multifunctional logger that consolidates the necessary functions for remote monitoring of equipment. In addition to analog inputs, it is a data logger equipped with control contact inputs and contact outputs, and it can use RS-232C, LAN, or FOMA for communication. Furthermore, it can connect input/output expanders such as contacts, and it supports continuous operation with AC power, DC 12V power, or battery backup, allowing for various forms of use. For more details, please download the catalog or contact us.

• Other security systems

The Network Logger EX is a multifunctional logger that consolidates the necessary features for remote monitoring of equipment. In addition to analog inputs, it has control contact inputs and contact outputs, and it can use RS-232C for communication, as well as LAN and FOMA. Furthermore, it can connect to input/output expanders such as contacts, and it can operate continuously with AC power, DC 12V power, or with battery backup, allowing for various forms of use. For more details, please download the catalog or contact us.

• Other security systems

The optical switching hub is an Ethernet switching hub with two ports for 100BASE-FX specifications compatible with single-mode optical fiber, and two ports for 10BASE-T and 100BASE-TX specifications. It has control and charging functions for a backup battery, allowing it to operate for a certain period during power outages. Additionally, to prevent the optical fiber communication path from being interrupted due to a power outage, it has a route switching function that automatically bypasses the optical fiber path to maintain the communication route when the operating power supply of the device is cut off (in the case of AC power failure or battery voltage drop). For more details, please download the catalog or contact us.

• Other security systems

In IP communication using optical fibers, there was a drawback that if there was a power outage along the way, communication with the subsequent devices would be interrupted due to the series connection of the equipment. The "optical switch" disconnects the equipment that has lost power from the communication path and directly connects it to adjacent equipment, thereby ensuring the communication path of the optical fiber beyond that point. Compared to traditional uninterruptible power supplies and network redundancy measures for power outage prevention, it offers a lower initial cost and simplifies the network. For more details, please download the catalog or contact us.

• Other security systems

The wireless relay is a device used to transmit commands and status information between each station in a snow melting system wirelessly. It is used in conjunction with a wireless modem. Status information obtained from sensors is sent from the lower side to the upper side wireless relay, and operational commands for the pump are sent from the upper side to the lower side. It is possible to operate equipment such as pumps located at a distance in coordination, or to collect information from multiple sensors to the master unit. For more details, please download the catalog or contact us.

• Other security systems

The specific low-power wireless modem is a device used for wireless data communication between control devices such as data loggers and multi-controllers and computers. It can transfer data from monitoring systems in remote locations or remote control systems for equipment via wireless communication. It is an energy-saving type that does not consume electricity unnecessarily. For more details, please download the catalog or contact us.

• Other security systems

The GWL-type water level gauge converts water pressure into an electrical signal using a pressure-resistant element and outputs DC 1-5V through a built-in amplifier. It can be measured with a typical voltage input data logger. This is an atmospheric pressure compensation type water level gauge that eliminates measurement errors caused by fluctuations in atmospheric pressure using a reference pipe within the cable. For more details, please download the catalog or contact us.

• Other measuring instruments

Until now, the monitoring for safety measures in sediment control works has often relied on "visual observation by monitors." However, it is extremely difficult to reliably prevent damage from debris flows that can occur at speeds exceeding 10 meters per second, which are unpredictable. Therefore, this system was developed with a focus on being easy to install, cost-effective, and, above all, highly reliable. For more details, please download the catalog or contact us.

• Emergency alarm system
• Waste treatment facilities
• Other measuring instruments

The high-density electrical exploration system captures underground structures more comprehensively and reliably compared to traditional electrical surveys and drilling alone, while also reducing survey efforts. Steady analysis techniques and survey results from various regions, such as mountainous areas and plains, correctly assess the stability of structures and their environmental impact, leading to appropriate design and construction. For more details, please download the catalog or contact us.

• Other civil engineering works
• Other measuring instruments

During slope failure, the slope shows signs such as tilting or the occurrence of cracks. These signs are captured by sensors, and the system that predicts and detects changes in the slope is called the "Slope Monitoring System." By using wireless communication, LAN, mobile phones, or the internet, it is possible to grasp the condition of the slope from anywhere, which can be utilized for slope countermeasure construction. This slope monitoring system has numerous achievements in areas with heavy snowfall and contributes to the prediction and forecasting of slope failures. For more details, please download the catalog or contact us.

• Analysis and prediction system
• Other measuring instruments

The multi-displacement gauge is a multi-point measurement type displacement gauge that efficiently monitors the displacement of ground and structures. It can simultaneously measure the positions of multiple points (up to 20 points) within a measurement range (standard 10m, maximum 20m) with a single unit. Multiple units can be connected to perform multi-point measurements over an even wider area. For more details, please download the catalog or contact us.

• Other measuring instruments

The slope diagnosis system "Thermos-λ" uses infrared imaging equipment to assess the aging of slope protection works that cannot be determined visually. Naturally, we are satisfied that we can obtain quick and easy-to-understand results, which are a significant factor in the diagnosis. This system can also be applied to evaluate the vitality of forests, the health of embankments and shorelines, as well as the freezing conditions of roads in snowy regions and the assessment of snow melting facilities. For more details, please download the catalog or contact us.

• Other measuring instruments

An analog voltage input type that allows free combination with sensors. It is a multi-channel general-purpose voltage data logger. It has a large memory capacity and can record up to 16,000 measurement values. Data can be retrieved using an LSI card. For more details, please download the catalog or contact us.

• Other measuring instruments

This is an analog voltage input logger that allows for flexible combinations with sensors. In addition to directly collecting data on a PC using an RS-232C terminal, it can also be collected using an LSI card, so there is no need to carry a PC to the site. For more details, please download the catalog or contact us.

• Other measuring instruments

This is an analog voltage input logger that can be freely combined with sensors. It comes with an alarm judgment function. While measuring, if the change exceeds the set value, a contact output will be triggered. For example, it can perform alarm judgments every minute and activate a siren or rotating light in case of abnormalities. Additionally, you can check the measurement values on the LCD screen. For more details, please download the catalog or contact us.

• Other measuring instruments

Our logger is an analog voltage input type logger that can be freely combined with sensors, and it can be directly connected to voltage output type sensors. Both 1ch to 24ch loggers are designed for low power consumption, allowing them to operate on batteries or solar cells in locations without power supply. Additionally, they operate over a wide temperature range, making them suitable for installation in outdoor control panels. All models are equipped with communication ports, enabling remote monitoring through the connection of wireless modems or communication devices. For more details, please download the catalog or contact us.

• Other measuring instruments

The GIC series tilt sensor detects changes in liquid level proportional to the tilt as changes in capacitance and converts them into electrical signals. It is a waterproof sensor with a built-in amplifier, making it highly effective for detecting tilt in environments that require weather resistance, such as outdoors, underground, or underwater. For more details, please download the catalog or contact us.

• Other measuring instruments

We will establish a communication network for observation wells. The monitoring software has a variety of data processing functions, graphing capabilities, and control functions for on-site observation equipment, meeting all requirements. The observation equipment operates via batteries, so measurements will not be interrupted during power outages until the batteries run out. It is possible to add measurement items such as groundwater levels, ground subsidence, precipitation, and snow depth. For more details, please download the catalog or contact us.

• Other measuring instruments

The flexible extensometer uses a flexible carbon fiber composite cable (CFCC) with a diameter of 4.2 mm instead of traditional inverter wires, allowing for a curved arrangement that adapts to the undulations of the ground surface. This enables long-term stable displacement measurement and reduces maintenance efforts. For more details, please download the catalog or contact us.

• Other measuring instruments

This is a measurement device suitable for monitoring and issuing warnings for landslides, slope failures, and debris flows, as well as for monitoring ground dynamics and managing construction and safety. It has a wide range of products, allowing for appropriate measurements tailored to site conditions. For more details, please download the catalog or contact us.

• Dam construction
• Other measuring instruments

Ground-penetrating radar (GPR) is a non-destructive exploration method that utilizes electromagnetic waves. A radar antenna placed on the surface (100 MHz to 1.6 GHz) emits electromagnetic waves towards the ground, and receives the waves that are reflected back from various underground objects (material boundaries). The received reflected waves are processed and displayed as subsurface images. Compared to trial excavation surveys, it is cost-effective and allows for continuous exploration. It has high mobility and enables rapid surveying. It can explore regardless of the material of the target objects (pipes, cavities, rebar, structures, etc.). Exploration is possible up to a depth of about 3 meters (this may vary slightly depending on soil conditions). For more details, please download the catalog or contact us.

• Other civil engineering works
• Rock drills, demolition machines, and excavators
• Non-destructive testing

On the slope, workers perform tasks while relying on their body weight on the lanyard attached to the main rope. The lanyard operates on a mechanism where "it is free when gripped" and "it stops when released," which can lead to falls if a worker loses balance and becomes unstable, causing them to reflexively grip the lanyard. To prevent falls due to improper operation of the lanyard, we developed a supplementary safety device called the "Assist Lanyard," which is installed below the main rope. In the event of a lanyard drop, the Assist Lanyard holds (locks) the main rope to prevent falls. For more details, please download the catalog or contact us.

• Safety and consumables

At Kowa Co., Ltd. Soil Testing Center, we conduct appropriate and innovative tests that consider investigation sites, analysis methods, construction planning, design, and execution, in line with ground conditions and construction requirements, providing test data useful for ground analysis. Additionally, we are advancing the networking of data communication to quickly provide field measurement and laboratory test data to clients and those in charge of investigation and analysis. For more details, please download the catalog or contact us.

• Geological Survey Company
• Soil Research Institute
• Geological Survey

By inserting an underwater television camera into the well and using the eye of science to observe accurately, we ensured that appropriate measures could be taken. The well observed with the underwater camera allows us to grasp the conditions inside, and if the cause is identified, even wells that were deemed at the end of their lifespan can be rejuvenated through proper treatment. Additionally, if the diagnosis concludes that rejuvenation is impossible and the well needs to be redrilled, measures can be taken based on the diagnostic results to address future needs. By adding the eye of science to our past experiences and achievements that relied on human observation, we can achieve more accurate diagnoses, ensuring safety and security for the wells. For more details, please download the catalog or contact us.

• maintenance

The drainage pipes, unlike buried pipes such as water and gas lines, often have abnormalities that are discovered only after serious incidents occur, such as road subsidence or the inflow of soil into the pipes due to damage. Therefore, proper maintenance, including inspections and investigations, is crucial. For more details, please download the catalog or contact us.

• Waterproofing work

EcoBlast cleaning uses sodium bicarbonate (baking soda), which is used in pharmaceuticals and food additives, as its raw material, ensuring high safety and no harmful substances in the wastewater. Media recovery is unnecessary, significantly reducing the amount of solid waste. For the repair or renovation of sewer pipes, removing corroded or deteriorated surfaces of concrete as a pre-treatment is the most important task for quality improvement. For more details, please download the catalog or contact us.

• cleaning

"Esuron Neo Lumber FFU" has the texture of wood, is lightweight and strong, and does not corrode. It also does not absorb water and excels in chemical resistance, insulation, and thermal insulation, combining the advantages of both natural wood and plastic. The "FFU Pressure Distribution Plate" is a lightweight pressure distribution plate for landslide prevention that can be installed in any location. It adapts to construction in situations that were previously considered difficult. For more details, please download the catalog or contact us.

• Retaining wall
• Pile and foundation work
• Concrete Machinery

The glass frame construction method allows for reliable and smooth installation even on steep slopes that were previously difficult. There are no concerns about water absorption or corrosion, so it can be easily installed in areas with fluctuating water levels while maintaining strength over the long term. It is highly durable and lightweight. It flexibly adapts to front greening methods that harmonize with natural slopes. For more details, please download the catalog or contact us.

• Retaining wall
• Earthworks
• Pile and foundation work

The ST drainage collection method is a large-diameter drainage collection horizontal hole technique designed to effectively eliminate groundwater, which can trigger landslides. It is suitable for construction in areas where groundwater is concentrated in large quantities and can be widely used not only from the surface but also in collection wells and drainage tunnels. For more details, please download the catalog or contact us.

• Drainage and water removal
• Earthworks
• Pile and foundation work

The NM Ground Anchor Method uses carbon fiber strands for the tensioning material, a stainless steel tendon grip for the anchor head, and a composite material reinforced with glass long fibers for the pressure plate, which provides excellent strength, lightness, and durability. It is a permanent anchor method that utilizes a new lightweight and rust-resistant material. It is ideal for anchor construction in harsh corrosive environments such as hot spring areas and volcanic regions. For more details, please download the catalog or contact us.

• Fiber wall
• Retaining wall
• Pile and foundation work

It's a waste to water with groundwater when the temperature is high! This water-saving timer is a control device that reduces the amount of watering by intermittently operating the pump according to the temperature fluctuations. By introducing the water-saving timer, you can easily and affordably transition from a regular snow-melting pipe to a water-saving snow-melting pipe. For more details, please download the catalog or contact us.

• pump
• Snow melting equipment
• Unit and other construction

The small electric resistivity meter "Well PACK 10" connects the logging cable to four terminals and automatically measures and digitally displays the resistance within vertical holes (open holes) such as boreholes and water intake wells using its tip electrode. It is a high-performance machine with high detection accuracy and is capable of ISO compliance. For more details, please download the catalog or contact us.

• Snow melting equipment
• Other analytical equipment

The snow melting multi-control system is a winter road information system for the IT era. With Kowa's technology and a variety of equipment, we build the optimal system tailored to local conditions. For more details, please download the catalog or contact us.

• Snow melting equipment

This is a snow melting nozzle that allows for easy adjustment of the watering distance. It consists of a detachable watering cap type that makes nozzle replacement easy and a standard type, with the watering cap type having three variations of watering forms. The detachable watering cap nozzle allows for the upper part to be removed, enabling cleaning of the watering holes and internal components, making it excellent for maintenance. For more details, please download the catalog or contact us.

• Snow melting equipment
• Exterior snow melting equipment
• Pile and foundation work

The double casing exclusive 'W.KVN Strainer' features a convenient internal thread structure for installation. With its large water intake capacity, it has a low environmental impact. There are also significant cost benefits. The original screw enhances hanging strength! Even with a one size reduction in diameter, it ensures sufficient clearance for gravel filling. For more features and details, please download the catalog or contact us.

• Other civil engineering works
• Drainage and water removal
• Geological Survey