興和 List of Products and Services

Introducing the "KVS Strainer 2," which innovates in strength, environment, and efficiency. It features a double structure made of rigid PVC pipes and a V-shaped wire-wound strainer made of stainless steel (SUS304), offering excellent corrosion resistance and durability. Additionally, it employs a smooth continuous slot surface, resulting in very low inflow resistance and outstanding water sampling efficiency, making it an ideal strainer for well drilling projects. For more details, please download the catalog or contact us.

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

The well screen (KVS strainer) is a strainer with a stainless steel wound type covering a rigid PVC pipe, which expands the opening area compared to conventional round hole strainers while ensuring strength. It is available in three sizes: 200A, 250A, and 300A. For more details, please download the catalog or contact us.

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

Conventional blocks consist of a "protrusion" where the pipe end protrudes from the body and a "recess" that fits into the end face of the body, and they were connected in sequence. In the new type of block, a portion of the end of the block body is notched to create a space for connecting joints, allowing the joint stored in one of the bodies to be slid and connected to the pipe ends after the block is installed. As a result, we have improved workability, maintainability, and safety. For more details, please download the catalog or contact us.

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

Traditionally, when corrosion or other issues occurred within snow-melting wells, it was difficult to conduct emergency inspections or affordable investigations. Kowa Co., Ltd. focused on this problem and successfully developed a compact, high-performance underwater camera. As a result, not only is rapid inspection during emergencies possible, but regular inspections are also feasible due to the low investigation costs. Kowa Co., Ltd. believes in the importance of regular inspections of snow-melting wells to ensure their functionality and to confirm the safety of the surrounding ground conditions. For more details, please download the catalog or contact us.

• Snow melting equipment

The RKL snow melting method involves paving the sidewalk with RKL pavement, where groundwater provided from a drainage pipe within the pavement fills the voids in the pavement and seeps out to melt the snow. This method serves as an intermediate approach between water-spraying snow melting and non-water-spraying snow melting. It is implemented in two types: slit type and flat type. For more details, please download the catalog or contact us.

• Snow melting equipment

The groundwater-saving snow melting method resolves issues such as the lowering of groundwater levels due to pumping or ground subsidence by reducing the amount of groundwater pumped while maintaining road surface conditions equivalent to regular snow melting. The RKL snow melting method involves paving the sidewalk with RKL pavement, where groundwater provided from a spring water pipe within the pavement fills the voids in the pavement and seeps out to melt the snow on the surface. River water snow melting is a method of melting snow by spraying river water in cases where the use of groundwater is difficult, with water intake methods including intake tank method, water diversion channel method, and intake weir method. For more details, please download the catalog or contact us.

• Snow melting equipment

The inverter control system is a water-saving snow melting system that adjusts the amount of water sprayed from the snow melting pipes according to the intensity of snowfall. By controlling the rotation speed of the submersible pump with the inverter control unit, water and electricity savings can be reliably achieved. For more details, please download the catalog or contact us.

• Snow melting equipment

The heat pump snow melting system is a system that generates high-temperature heat from low-temperature natural energy sources such as air and groundwater captured by the heat pump, and provides that heat to the circulating water for snow melting. It utilizes natural heat sources like air, groundwater, and hot springs, making it an environmentally friendly snow melting system that does not emit exhaust gases. Since it can obtain a greater amount of snow melting heat than the power consumption, the electricity costs are approximately one-third to one-fourth lower compared to electric heating methods. The heat pump can be installed in a unit type, making installation easy. For more details, please download the catalog or contact us.

• pump
• Snow melting equipment

For the efficiency and cost reduction of snow melting facilities! We also sell specialized equipment necessary for snow melting and snow removal facilities. For more details, please download the catalog or contact us.

• Snow melting equipment
• others

The snow-melting precast RC pavement slabs are produced in a factory with embedded heat dissipation pipes, eliminating the need for curing on-site, allowing for immediate release and shortening construction time. Being factory-made ensures stable quality. They use high-strength concrete, providing excellent wear resistance. For more details, please download the catalog or contact us.

• Snow melting equipment

The hot water boiler snow melting system heats circulating water with a hot water boiler to warm the pavement for snow melting and freeze prevention. It enables stable snow melting even under severe weather conditions. For more details, please download the catalog or contact us.

• Snow melting equipment

The gas heat pump system for snow melting facilities uses a gas engine-driven heat pump to obtain heat and heat circulating water for snow melting and freeze prevention. Since the compressor is driven by a gas engine, it can reduce power consumption. It is also possible to keep the contracted power below 50 kW, eliminating the need for substation equipment required for high-voltage power, thus achieving cost savings. For more details, please download the catalog or contact us.

• Snow melting equipment

The gas cogeneration system snow melting facility is a system that utilizes both electricity and heat generated by a gas cogeneration system, which uses micro gas turbines or gas engines fueled by natural gas for snow melting. The cogeneration system has an energy efficiency of 70% to 80%, allowing for a reduction in gas usage of about 20% to 30% compared to conventional gas boiler snow melting. The carbon dioxide emissions and running costs are approximately half of those of electric heating snow melting systems. For more details, please download the catalog or contact us.

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

The waste heat emitted from facilities includes warm wastewater and warm exhaust. Warm wastewater has been used as a heat source for snow melting, such as in hot spring drainage, but warm exhaust, despite being abundant, has a low energy density, making it a difficult heat source to use for snow melting. The snow melting facility "Air Melting ACCESS" utilizes abundant warm exhaust, or air, by sending it under the pavement using a unique method, making it an energy-efficient and low environmental impact snow melting facility. For more details, please download the catalog or contact us.

• Snow melting equipment

The sewage heat utilization heat pipe snow melting facility is designed to arrange heat pipes along the perimeter of the sewage pipes, transmitting sewage heat to the surface for snow melting. Since the sewage heat is conveyed through heat pipes, no electrical equipment such as circulation pumps is required. Additionally, there are no concerns about corrosion or clogging since it does not involve piping within the sewer system. For more details, please download the catalog or contact us.

• Piping and insulation

The solar thermal storage method (shallow geothermal heat utilization) snow melting facility collects solar heat using paved surfaces as collectors during the summer, stores this heat underground through circulating water, and then extracts and radiates this heat during the snowfall period for snow melting and frost prevention. It is an environmentally friendly snow melting system that utilizes solar and geothermal heat, with low running costs. The energy for snow melting is entirely provided by solar heat, making it an environmentally friendly system that only requires minimal power for the circulation pump. The storage area utilizes the underground of parking lots. For more details, please download the catalog or contact us.

• Snow melting equipment

The hot spring heat exchange method (using heat pipes) for snow melting facilities heats one end of the heat pipe buried in the road surface with hot spring discharge water to facilitate snow melting and prevent freezing. There are two methods for heating the heat pipes: the ditch type and the header pipe type. In the ditch type, heat pipes are placed at the bottom of the ditch for heat exchange, while in the header pipe type, hot spring discharge water flows through a header pipe into which the heat pipes are inserted for heat exchange. For more details, please download the catalog or contact us.

• Snow melting equipment

The hot spring heat exchange method (heat exchanger utilization type) snow melting facility uses a heat exchanger to transfer the heat from the hot spring to circulating water for heating, warming the pavement to facilitate snow melting and prevent freezing. It is an environmentally friendly snow melting system that effectively utilizes hot spring wastewater. Depending on the temperature and flow rate of the hot spring, it can demonstrate a very high snow melting capacity. For more details, please download the catalog or contact us.

• Snow melting equipment

The air heat utilization heat pump snow melting facility uses an air source heat pump to obtain heat from the air, heating circulating water for snow melting and freeze prevention. Even in areas without special snow melting heat sources like groundwater, environmentally friendly snow melting facilities utilizing natural heat (air heat) are possible. For more details, please download the catalog or contact us.

• pump
• Snow melting equipment

The groundwater thermal utilization heat pump snow melting facility heats circulating water using a heat pump that utilizes tunnel spring water or groundwater as a heat source, enabling snow melting and preventing freezing on road surfaces. Even when the temperature of the groundwater (tunnel spring water) is low and cannot normally meet the meteorological conditions of the planned site, snow melting becomes possible by using the heat pump. For more details, please download the catalog or contact us.

• pump

The snow melting facility using groundwater circulation warms the pavement and prevents freezing by directly passing groundwater through heat exchange pipes. The groundwater after passing through the heat exchange pipes is returned underground from a recharge well. By recharging the utilized groundwater, it can suppress issues such as ground subsidence caused by groundwater extraction. In areas rich in groundwater, it becomes a cost-effective snow melting facility with low initial and running costs. For more details, please download the catalog or contact us.

• Snow melting equipment

The geothermal heat exchange snow melting system circulates water (antifreeze) through a heat exchange well to extract geothermal energy, and then circulates the warmed water through heat dissipation pipes embedded in the pavement, thereby heating the pavement for snow melting and freeze prevention. Since it does not involve pumping groundwater, there are no concerns about groundwater depletion, land subsidence, or groundwater contamination. For more details, please download the catalog or contact us.

• Snow melting equipment

The geothermal heat pump snow melting system extracts geothermal energy through a heat exchange well, raises the temperature using a heat pump, and circulates antifreeze through heat dissipation pipes for snow melting and frost prevention. By using a heat pump to convert geothermal energy into a more usable form for snow melting, it achieves a high snow melting capacity while being energy-efficient. The heat exchange well is approximately 100 meters deep, with a dedicated heat extraction pipe inserted, allowing for stable geothermal energy during the winter months. For more details, please download the catalog or contact us.

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

The geothermal heat pipe snow melting facility inserts heat pipes into boreholes of 15 to 20 meters deep, transporting geothermal energy to the pavement for snow melting. Since the heat pipes are simply buried under the snow melting area, there is no need for control panels or energy supply equipment that were required for conventional snow melting facilities. By utilizing heat pipes that transport heat powered by the temperature difference between the underground and the pavement, it enables "100% natural energy" eco-friendly snow melting without using electricity, gas, or oil. For more details, please download the catalog or contact us.

• Piping and insulation
• Snow melting equipment

Snow melting and snow removal facilities can be broadly categorized into those that utilize natural and unused energy sources such as groundwater and geothermal energy, and those that use fossil energy sources such as oil and gas. Our company is actively engaged in the development of environmentally friendly snow melting and removal facilities that consider the use of natural and local energy, as well as the effective use of fossil energy. For more details, please download the catalog or contact us.

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

Improved workability and maintenance support. 【Features】 ○ Installation is extremely simple compared to conventional types, resulting in increased speed. ○ Installation only requires straightforward alignment and level adjustment (on par with the installation work of curbs and U-shaped drains). ○ The effort required to move the blocks themselves is minimal, preventing the occurrence of personal accidents. ○ Since it is possible to replace individual blocks that have defects, there is a significant difference in maintenance costs. ● For other functions and details, please download the catalog.

• Piping and insulation
• Snow melting equipment

A heat pipe is a metal pipe that is evacuated and filled with a working fluid such as alternative refrigerants. When one end of the heat pipe is heated, the working fluid quickly turns into vapor and moves at high speed to the opposite end. As the vapor moves, it releases heat, and the cooled vapor transforms back into the working fluid and returns to the heating section due to gravity. 【Features】 ○ A heat pipe is a dream thermal conductor that can draw geothermal energy without any power source. ○ It is maintenance-free and requires no fuel or electricity costs at all. ○ Since it does not use electricity or oil, it is "environmentally friendly" and matches the needs of the future. ○ Although there are some construction costs, there are no operating or maintenance costs at all. ● For other functions and details, please contact us.

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

A new snow melting system that uses air instead of antifreeze. 【Features】 ○ Air is harmless even if it leaks and does not require piping. ○ The heat dissipation part consists of tiles with ducts, making installation and maintenance easy. ○ It is possible to utilize the warm exhaust from existing heat sources. ○ Installation can be completed in a short time. ● For other functions and details, please contact us.

• Snow melting equipment
• Tile work
• District heating and cooling/heat source system

Strength, environment, efficiency. A groundbreaking water extraction product that innovates everything. 【Features】 ○ Confident in strength. ○ Environmentally friendly. ○ High water extraction capability. ○ Resistant to sand pumping phenomena. ○ Easy scale removal. ○ Economical and suitable for long-term use. ● For other functions and details, please download the catalog.

• Piping Equipment

Inexpensive and speedy. 【Features】 ○ The camera has a small diameter of 23mm, allowing it to be inserted into the gap between the casing and the pump for shooting. ○ Due to its small caliber, inspections can be conducted without pulling up deep well pumps. ○ Capable of shooting at water depths of up to 100m. ○ The side-view camera has a focus function, providing clear images. ○ Lightweight and easy to handle for inspections. ○ Simultaneous shooting of direct and side-view images makes it easy to understand the situation. ● For other functions and details, please contact us.

• Other measuring instruments