前澤工業 List of Products and Services

In the water supply business, in addition to providing "abundant and safe water" stably, there is also a demand for qualitative improvements such as "delicious water that can be safely consumed." To meet this demand, we are not only further enhancing water purification treatment machinery and equipment but also diversifying our products by incorporating advanced water purification treatment systems that utilize membranes, biological processes, ozone, and activated carbon into traditional systems. We are building efficient water purification treatment systems that respond to the conditions of the raw water and facilities, contributing to the provision of delicious water.

• Water treatment equipment

For over 70 years since our establishment, we have introduced many de facto standard products, including butterfly valves and gates, which hold a top market share in the fields of water supply and sewage systems. We provide high-quality products through a consistent system that encompasses research, development, material selection, casting, processing, assembly, and hydraulic testing.

• Other water treatment equipment

Since our founding, we have been engaged in the development of social infrastructure related to water supply and drainage, water resources, and agricultural water for seventy years, as well as soil and groundwater purification projects and industrial wastewater treatment facilities, all of which connect water and life. Moving forward, we will actively and boldly tackle the major themes of the 21st century, "water and environmental issues," as a specialized company, and strive to develop into a company that meets your trust and expectations. For more details, please contact us or refer to our catalog.

• Filtration Equipment
• Water treatment equipment
• Wastewater/wastewater treatment equipment

The most important thing in sludge dewatering is floc formation. The quality of the floc greatly affects the dewatering capacity of the screw press. Maezawa Industrial Co., Ltd. will assist you in creating optimal floc and selecting the right chemicals. Even within the same industry or type of sludge, the characteristics of the sludge can vary depending on the site. If the sludge characteristics differ, a corresponding screw press is necessary. Maezawa Industrial Co., Ltd. provides the optimal screw press for your sludge. For more details, please contact us or refer to our catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment

In forming a "circular society," the suppression and reduction of waste generation are required. Maezawa's screw cutter is a next-generation crushing machine that crushes sludge generated from sewage treatment plants and pumping stations while transporting it, based on a new crushing principle developed through unique technology. With Maezawa's original internal and external screw mechanism, it can reliably crush and reduce the volume of sludge, and its simple structure makes operation and maintenance easy. For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment
• cutter

It consists of a screw shaft with cutter blades on the outer circumference of the screw wings, a cutter receiving blade that captures the residue and meshes with the cutter blades, a screen made up of semicircular screen bars, and a drive unit, among other components. For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment
• cutter

The hybrid membrane system using PTFE membranes is a new membrane filtration system that combines the adsorption effect of powdered activated carbon with membrane separation, allowing for the removal of dissolved components that could not be eliminated by conventional membrane filtration devices alone. It can remove not only turbidity but also organic matter, dissolved manganese, and ammonia nitrogen, enabling more advanced water treatment. For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment

The multi-mesh screen is a revolutionary dust removal device with a new and unique structure that has never been seen before. As the demand for the removal of fine debris in lower drainage treatment has increased in recent years, we propose the MMS. It is the latest screen equipped with endlessly mounted crescent-shaped thick polyethylene mesh panels (PE). For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment

Achieving low noise and tough aperture.

• Other water treatment equipment

The "LO-TM" utilizes a specially shaped valve body with a comb-like tooth structure that resembles the character "ku" to transform the fluid into multiple fine jet streams, thereby dispersing cavitation. Consequently, it achieves low noise (Low Tone) and low dynamic torque (Low Dynamic Torque), as indicated by "LO-TM," while also offering high rangeability. It allows for advanced control compared to conventional water supply butterfly valves, boasts excellent anti-cavitation characteristics, and has compact dimensions that are the same as those of standard water supply butterfly valves. For more details, please contact us or refer to the catalog.

• valve

The Jet Port MBV-FF-JP type is a valve body equipped with ports and grooves that were developed from the analysis of fluid characteristics. The LO-TM has evolved into the Jet Port. The valve body with a honeycomb structure enables superior low noise and robust throttling operation compared to the LO-TM through the simultaneous effects of flow diffusion and rectification. The upstream ports and grooves are arranged parallel to the flow, converting the water flow into a uniform jet stream, which creates a rectifying effect that suppresses the generation of large vortices and reduces turbulent noise. The downstream ports and grooves transform the flow into a jet stream, diffusing it from the center of the valve body to the outer circumference, thus providing attenuation. This diffusion effect achieves low noise and low vibration. For more details, please contact us or refer to the catalog.

• valve

The phenomenon where the valve body is lifted by negative pressure during exhaust, that is, the suction phenomenon, is designed to occur less frequently. Therefore, a large amount of exhaust can be performed, significantly reducing the water passage time. The sealing part uses O-rings that can withstand many years of use. As a result, it has excellent durability, and there is no risk of the floating valve body sticking due to aging. Consequently, both suction and exhaust are always smooth, and the sealing performance is good, preventing any functional decline. The main body has a rational cylindrical shape, making it compact and lightweight, and handling and installation work is extremely easy. The main components are made from carefully selected synthetic resin, allowing them to withstand many years of use. A ball valve with low fluid resistance is adopted, ensuring reliable functionality as a repair valve. Additionally, due to its small size, it requires less space, and the opening and closing operation can be performed easily. For more details, please contact us or refer to the catalog.

• valve

Maezawa's cast iron gates are designed to fit all facilities and usage conditions, providing products that satisfy users in terms of strength, material, and functionality. We have a proven track record at many water management points, including water purification plants, sewage treatment plants, pumping stations, drainage and irrigation facilities, reservoirs, and retention basins, earning us high trust. For more details, please contact us or refer to our catalog.

• valve

The LANDOX OD system is a new oxidation ditch (OD) system that combines the high-efficiency water flow generation device LANDOX with a micro-bubble aeration device. It is suitable for energy-saving and advanced treatment in the renovation of existing OD system facilities, as well as optimal for new installations and deep OD (approximately 5 meters deep). Its excellent energy-saving performance is expected to significantly contribute to CO2 reduction in wastewater treatment plants. For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment

The washer press is a compact and easy-to-handle dewatering machine equipped with a cleaning function that automatically cleans and dewaters sludge. This machine enables the automation, labor-saving, and sanitation of maintenance management. The cleaning screw has a hollow shape and performs a repetitive motion of forward and reverse, allowing the sludge to be mixed and stirred with the cleaning water without being compressed, ensuring stable cleaning. The amount of cleaning water used has been significantly reduced compared to conventional methods. For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment

In recent years, the adoption of the "jet pump type sand lifting machine" and sand pumps in sedimentation tanks at wastewater treatment plants and pumping stations has been increasing due to their compact design and low odor. The "pipe transfer method," which performs solid-liquid separation using sediment separation machines, has gained popularity. Conventional sediment separation machines risk resuspending inflowing sediments and have difficulty recovering fine particles. To address this, Maezawa has developed the "Escargo," a sediment separation machine that enhances sedimentation effects with a unique spiral separation mechanism, prevents the resuspension of collected sediments by partitioning the separation and storage areas, and achieves high separation efficiency while being space-efficient and energy-saving. For more details, please contact us or refer to our catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment

Currently, there is an increasing number of pump stations reaching their update period, leading to a growing demand for easier maintenance and shorter construction periods compared to existing ones. The "unit-type pin rack dust collector" is a dust collector that condenses a wealth of know-how that Maezawa has cultivated over many years as a top runner in sedimentation tank machinery. It is capable of meeting the diverse needs of our customers. For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment

PTFE membranes are long-lasting hollow fiber precision filtration (MF) membranes with excellent membrane strength and chemical resistance. The degradation that occurs during long-term use of the membrane includes a decline in mechanical strength and permeability. Regarding the degradation of mechanical strength, PTFE membranes inherently possess very strong strength and excellent chemical resistance, so there is almost no degradation even after long-term use. Additionally, the decrease in permeability is related to the types of chemicals that can be used for membrane cleaning. PTFE membranes demonstrate strong resistance to acids, alkalis, oxidizing agents, etc., allowing for cleaning with strong chemicals that were not possible with conventional membranes. Therefore, the removal of fouling substances from the membrane during long-term use becomes easier, enabling safe operation over extended periods. For more details, please contact us or refer to the catalog.

• Wastewater/wastewater treatment equipment
• Other water treatment equipment
• Filtration Equipment

Ozone treatment has been used for water treatment for many years in various European countries, starting with France, and it has also been adopted in our country for the removal of odor substances and the decomposition of organic matter, with its importance as an advanced treatment method increasing. However, since ozone is unstable and easily decomposed, there is a demand for ozone contact devices with high ozone dissolution efficiency and reaction efficiency. On the other hand, water purification plants in urban suburbs are facing difficulties in acquiring land, not only for expansion but also for the introduction of advanced treatment facilities, due to ongoing development in surrounding areas. The "U-Tube Ozone Contact Device," which Maezawa has introduced, shows significantly better ozone dissolution efficiency compared to conventional aeration pipe ozone contact devices, and it also achieves substantial space savings, making it a groundbreaking device for our country, which faces land acquisition challenges. For more details, please contact us or refer to the catalog.

• Other water treatment equipment
• Wastewater/wastewater treatment equipment

This is a new sedimentation pond system designed for cost reduction. It offers excellent economic efficiency. With fewer sliding parts, maintenance is easy. The components are made of stainless steel, providing excellent corrosion resistance (the guide rails are made of high-density polyethylene). It can accommodate sedimentation ponds up to 11 meters wide and 80 meters long with a single reciprocating sludge scraper. For more details, please contact us or refer to the catalog.

• Other water treatment equipment
• Wastewater/wastewater treatment equipment

To handle water, which is the source of life, rigorous analysis, inspection, and evaluation are essential. The analysis center acts as a checkpoint for water quality and contaminants, monitoring various processes, providing necessary feedback, and supporting quality and optimization. As a part of the Development Headquarters, which is at the core of the technology of Maezawa Industrial Co., Ltd., we possess excellent technology in measuring disinfection by-products such as trihalomethanes, harmful metals, and testing pathogenic microorganisms including Cryptosporidium. Additionally, based on this technology, we are actively engaged in the registration of water quality inspection agencies under Article 20 of the Water Supply Act, environmental measurement certification business (concentration) registration, and O&M and PFI projects focused on private outsourcing in the maintenance and management of water supply and sewage systems. For more details, please contact us or refer to our catalog.

• Other environmental analysis equipment
• Water quality testing
• Soil testing

Our technology supports the modern water cycle behind people's lives. Social infrastructure has always been one of the fundamentals of nation-building. We perceive it as our mission to accurately respond to the demands of changing times, such as the new water supply vision, sewerage vision, and public-private partnerships.

• Water treatment equipment
• Other water treatment equipment