Oriental Instruments & Dongyi Technology

Targeting global production of helium leak detection equipment; independently developed quality flow meter filling machines, with customers spread across various domestic refrigeration enterprises, enjoying high recognition in the industry.

Patent Certificate


A vacuum drying and degreasing device

A vacuum drying and degreasing device

A micro-pressure differential leak detection device

A micro-pressure differential leak detection device

General Leak Detection Device

General Leak Detection Device

A three-hole connector that prevents vacuum glow discharge

A three-hole connector that prevents vacuum glow discharge

A high-precision leak detection device

A high-precision leak detection device

A long-distance refrigerant delivery pressure stabilizing device

A long-distance refrigerant delivery pressure stabilizing device

A vacuum tube de-icing and dehumidifying device

A vacuum tube de-icing and dehumidifying device

An AC voltage signal sampling circuit for vapor deposition power supply

An AC voltage signal sampling circuit for vapor deposition power supply

A pneumatic integrated valve for helium recovery pipelines

A pneumatic integrated valve for helium recovery pipelines

An automatic alignment device for stacking workpieces

An automatic alignment device for stacking workpieces

A multi-system single-gun filling machine

A multi-system single-gun filling machine

A three-phase medium frequency voltage overvoltage protection circuit for induction heating power supply

A three-phase medium frequency voltage overvoltage protection circuit for induction heating power supply

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The main products of our company now include refrigerant filling machine, explosion-proof filling machine, vacuum purification filling machine, special power supply, helium inspection equipment, etc.

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