Shin Nippon Machinery, Peerless Pump, Honda Kiko



Daido Internal Gear Pumps

G Series

Daido Internal Gear Pump G series has many supply records in liquid transfer of various industries such as petrochemical, pharmaceutical, food etc. We are highly evaluated for its durability and reliability. The gear, which is the heart of the pump, demonstrates a long service life and high efficiency with originally developed Taocloid gear tooth profile.
For our main products G series, there are more than Two Million Selections, combining the main material, material of bush, method of sealing, with or without jacket etc. From among these, you can make an appropriate combination of pump according to customers needs.


Japan made, various supply records both in Japan and overseas.

Easy disassemble and cleaning at wetted parts, due to single shaft construction.

Maintenance of wetted part is possible with main body attached to piping.

Excellent durability, made-to-order internal gear pump suitable for special applications.

Wetted part (including shaft seal part) Jacket type is available.

Applied originally developed Taocloid gear tooth profile (patented).


Pressure Max. 4.5Mpa

Temperature Max. 450

Viscosity Max. 2,500,000mPa.s

Capacity Max. 660m3/h

Main Material FC, SUS ( Based on actual results, special materials available)

Theory of Function


When the driving gear and the pinion gear are disengaged on the suction side of the casing, a negative pressure area is created and liquid flows into this area.


When liquid is captured in the teeth clearances of the driving and pinion gear, the liquid is transported in the rotation direction. The crescent-shaped separation member of the casing cover partitions the gap formed due to eccentricity between the pinion and driving gears and serves to carry a fixed volume of liquid to the discharge side.


The inside of the gear casing is filled with liquid that has been carried in.


Then, the teeth of the driving gear and pinion gear fully mesh in the middle between the suction side and discharge side, forming a sealing point to prevent internal leakage. This action increases the liquid pressure and causes liquid to be discharged from the discharge port.