MIHANA SEISAKUSHO｜SJ Machinery Co., Ltd.

Introduction

MIHANA

Mihana Seisakusho is a Japanese family-owned company with over 70 years of expertise in safety valve design and manufacturing since 1952.

Renowned for its proprietary mirror-finish lapping technology, Mihana safety valves provide exceptional sealing performance with virtually no leakage before lift-off. This makes them particularly suitable for demanding applications involving corrosive and flammable gases such as oxygen, carbon dioxide, and hydrogen.

Mihana’s safety valves are widely used in petrochemical plants, boilers, power stations, hydrogen fueling facilities, and liquefied gas transportation systems, delivering reliable overpressure protection in critical industrial processes.

Promotion

Application Industries

Fire Protection Applications

Fire Protection Pressure Relief Valve

A Fire Protection Pressure Relief Valve is designed to protect fire water systems from excessive pressure caused by thermal expansion, fire pump operation, sudden valve closure, or other abnormal pressure conditions. When system pressure exceeds the preset value, the valve automatically opens to relieve excess pressure and closes once normal operating pressure is restored, protecting fire pumps, piping, valves, and associated equipment from overpressure damage.
Flammable Gas Applications

Hydrogen Refueling Stations

Designed for high-pressure hydrogen refueling stations, providing reliable overpressure protection for hydrogen storage, compression, and dispensing systems to ensure safe and stable operation.
Chemical Industry

Specialty Gases

Designed for demanding applications involving corrosive and flammable gases, delivering dependable overpressure protection and long-term reliability.

Products

KANTAK

Loose Flanged Lowlift Safety Valve

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HKANTAE

Lowlift Safety Relief Valve with handle

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LKANTAE-S

Lowlift Safety Relief Valve for liquid

Lowlift Safety Valve

Back Pressure-Resistant Fullbore Bellows type Safety Valve

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SG122

Flanged Inlet Safety Valve for Boilers

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SC120

Safety valve for Once-Through Boilers - Zero Leakage by Soft-seated

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SA100

Full-bore Safety valve

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