Product Lineup

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 customer’s needs.

Characteristic
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).
Specification
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

  1. 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.

  2. 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.

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

  4. 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.

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SE Series

The Daido Internal Gear Pump SE series was born as a result of many years of R&D based on G series which has quite a lot of supply records in the chemical industries etc. The structure characterized by the originally developed Taocloid gear tooth profile and high functionality realizes outstanding performance and operation for general application.

Characteristics
Price is less expensive than G series (SUS)
Compact design than G series
Maintenance of wetted part is possible with main body attached to piping
Applied originally developed Taocloid tooth profile (patented)
Manufacturing by our subsidiary factory in China, major components are supplied from Japan
Jacket construction is possible
Specification
Pressure　Max. 1.0Mpa
Temperature　Max. 150℃
Viscosity　Max. 50,000mPa.s
Capacity　Max. 152m3/h
Main Material　SUS

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TG Series

TG series realize the two contrary advantages of outstanding performance and low cost by applying originally developed Taocloid gear tooth profile and producing in our subsidiary factory in China.

Characteristics
Price is less expensive than G series (FC)
Compact design than G series
Maintenance of wetted part is possible with main body attached to piping
Applied originally developed Taocloid gear tooth profile (patented)
Manufacturing by our subsidiary factory in China, major components are supplied from Japan
Specification
Pressure　Max. 1.38Mpa
Temperature　Max. 149℃
Viscosity　Max. 75,000mPa.s
Capacity　Max. 55m3/h
Main Material　FC

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Seal-less Pumps

M series

Daido Mag Pumps are internal gear type seal-less pumps of Taocloid gear tooth and magnet coupling using rare-earth cobalt magnet.

Characteristics
Seal-less internal gear pump combined with magnet coupling
No leakage at shaft seal
Possible to apply temperature at 200℃
Applied originally developed Taocloid gear tooth profile (patented)
Specification
Pressure　Max. 1.2Mpa
Temperature　Max. 200℃
Viscosity　Max. 20,000mPa.s
Capacity　Max. 30m3/h
Main Material　SUS

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Lobe Pumps

NR series

Daido Lobe pumps are non-contact type pumps, in which 2 rotors are driven via a timing gear and do not contact each other.
We applied originally developed trilobal rotor.
As a standard specification, a sanitary screwed union joint is applied for connection of suction and discharge port, but we can also provide with ferrules, flanges and PT screws.

Characteristics
Pump with non-contact originally developed trilobal rotor.
Liquid is transferred in a smooth manner without being damaged or the solid content being broken.
Available with both rotation, the suction and discharge line can be freely chosen.
Perfect Sanitation.
Adopting SUS316 as material.
Specification
Temperature　Max. 100℃
Viscosity　Max. 1~500,000mPa.s
Capacity　Max. 60m3/h
Main Material　SUS

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Vane Pumps

V series

The rotor shaft is eccentrically installed. When it rotates, 2 rotor-plates (vanes) slide alternatively and transfer the liquid. This simple structure enables easy handling such as cleaning and disassembly and contributes to low maintenance costs and high economic performance.

Characteristics
2 rotor-plates (vanes) slide alternatively and transfer the liquid
Easy to disassemble and cleaning due to simple structure
Jacket construction is availabel

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Vacuum Pumps

H series

Despite the equipment heavy weight per air flow due to low speed operation, our reciprocating vacuum pumps are still widely used because of their advantages such as solid structure, easy handling and high efficiency in the intermediated vacuum range.

Characteristics
Maintenance at site is possible
Less maintenance time reduced production cost by stopping operation
Possible to supply peripheral equipment such as silencer, mist separator, etc.
Specifications
（HI型）
Type: Water-cooled horizontally-reciprocating
Piston pump with single slide valve
Pumping speed: 2.0～38.4m3/min
Ultimate pressure: 800～470Pa
（HT）
Type: Water-cooled horizontally-reciprocating
Piston pump with double slide valve
Pumping speed: 2.0～38.4m3/min
Ultimate pressure: 67～9Pa

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