Ota City Industrial Promotion Organization

profiles of companies

profiles of companies


  • Design, product development and system development.
  • Automated devices, labor-saving devices, factory-automation devices
  • General machinery, industrial machinery
  • Communications, monitoring, measurement, analysis
  • Other
  • Machine assembly, unit assembly

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Vacuum oil purifier VSD-6000T Vacuum oil purifier VSD-6000T
Vacuum pump Unit Vacuum pump Unit
Heatless Dry Air Generator Heatless Dry Air Generator
Coalescer Oil purifier Coalescer Oil purifier
"ALSO" Hot Line oil purifier "ALSO" Hot Line oil purifier
Oil tester Oil tester
Hermetic tank Type Oil filter Hermetic tank Type Oil filter
Vacuum oil purifier VSD-6000T
Vacuum pump Unit
Heatless Dry Air Generator
Coalescer Oil purifier
"ALSO" Hot Line oil purifier
Oil tester
Hermetic tank Type Oil filter

We established in 1950 as manufacturer of mainly special granular activated alumina which is used for reclamation of transformer oil. Since then,we have been continuing consistent exertion and study as a special manufacturer of treatment equipment and maintenance apparatus for various fluids such as oil, air and gas.

Specialized Products, Technologies and Services

High vacuum oil purifier

Sanmi Vacuum Oil Purifier is designed to purify insulation oil. Through the process of dehydration, degassing and fine filtration process, the dissolved water, dissolved gases and particles can be removed completely to upgrade the properties of transformer insulating oil.
This compact unit allows you easy access for handling, checking and maintenance of both its oil system and exhaust system.

PERFORMANCE(Mineral Insulating oil containing 10% to 12% of dissolved gas and 50ppm of moisture can be improved to following after single circulation):
VS Type: Max.10 ppm(Water content) ; Max.0.25%(Gas content); Min.60kV(Dielectric breakdown)
VSD Type:Max.5 ppm(Water content) ; Max.0.1%(Gas content); Min.70kV(Dielectric breakdown)


We are one of the pioneers in developing of Hot Line Oil Purifiers in Japan. This purifier is used to filter impurities in the insulating oil occurring from incomplete combustion during switching operation of the on-load tap changing transformer, the on-load voltage regulator and the oil circuit breaker,etc.
Cycle filtration is carried out to remove the large volume of suspending carbon, copper and other metal colloid particles which are in a hot line condition.

1. Oil purification is available under hot line condition.
2. No air bubble can be produced by circulating of the oil in the tap changer.
3. "ALSO" can absorb moisture and organic acids to increase dielectric strength of
the oil.
4. "ALSO" allow the filter element to eliminate colloid impurities.
5. High accuracy filtration under low pressure by special filter element can allow
the purifier to entirely remove the suspended carbon in the oil.
6. High removal capacity of carbon ensures continuous operation over one year at
one time exchange of the filter element. Because of the low price of the filter
element, the replacement cost is very low.
7. This equipment is designed and manufactured to be free from oil leakage.

Heatless Type Dry Air Generator

This Heatless type dry air generator is suitable for supplying dry air at site and is able to be continuously operated without manual assistance by automatic recycling of air drying and regeneration of absorbent.
The features of the heatless type is the fact that moisture adsorption and reclamation of adsorbent is performed automatically and mutually at an interval of 5 minutes and can be used for semi-permanently. Furthermore, reclamation of the used adsorbent does not need any heat source such as an electric heater, and is carried out with 15 - 20% of the generated dry air branched from the dry air outlet. This Heatless type dry air generator is contrived so as its dry air consumption to be less than 15%.

Current Status of Overseas Business

On-site production
Sales bases (incl. dealerships) Vietnam,Philippines,China,etc.
Export Taiwan,Vietnam,Thailand ,direct business till to 30countries
Outsourcing production /processing
Technology partnerships
R&D bases

Key Business Partners

・JR railway companies・Mitsubishi electric Co. ・Hitachi, Ltd ・FUJITSU GENERAL(SHANGHAI)CO. ・SHANGDONG ELECTRIC POWER TRANSMISSION AND SUBSTRATION ENGINEERING CO. (CHINA) ・SHANGHAI BAOSTEEL CO.,LTD (CHINA) ・FORTUNE ELECTRIC CO.,LTD(TAIWAN) ・Hyundai Heavy Industries Holdings Co., Ltd.(KOREA) ・HKE (HK) ・EGAT(THAILAND) ・TNB(MALAYSIA) ・Power Transmission Co.(VIETNAM) ・ PT PLN (Indonesia) ・Saudi Electricity Co.(Saudi Arabia)

Future Target Countries and Regions

Mainly Southeast Asian countries

Overseas Business Prospects

Company Information

Representative Hisayoshi Tamaru
Address 2-14-3,Shimomaruko, Ota-ku, Tokyo 146-0092
URL http://www.sanmi.co.jp
Established in 1950
Capital 48 million yen
Employees 60
International Certification (e.g. ISO) ISO9001


Name Yoyo Ichikawa
Position Overseas sales Dept.
Tel +81-3-5482-2101
Fax +81-3-5482-2432

Ota City, Tokyo. Home of the excellent 4,200+ manufacturers

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