Tohkemy Corporation
Tohkemy DulcoFlex Chemical Pump


Manufacturer: Tohkemy Corporation
Model: DulcoFlex
Features
Ideal Application: Efficiently transfers slurries, pastes, high-viscosity liquids (up to 60,000 mPa·s), and bubble-laden fluids without damaging delicate solids like metal powders or creams.
Efficient Roller System: Operates smoothly without an oil bath to save energy, while high self-priming handles suction heights up to 8 meters.
Reversible & Seal-Less Design: Features a simple, seal-less, valve-free structure that supports both forward and reverse operation.
Leak Detection & Safety: A sealed protective housing encloses the durable primary hose. Facilities can add an optional 24 VDC sensor to monitor leaks continuously in real time.
Flexible Flow Control: Standard inverter-compatible motors allow precise flow rate adjustments up to a 1:10 ratio with an external inverter.
Enhanced Drive Performance (DFCa Model): Twin roller drive shafts ensure steady rotation and consistent output, even under heavy loads.
*1 To maximize structural flexibility and fatigue resistance, the hose integrates a mesh-woven reinforcement matrix within its intermediate layer, delivering superior tensile strength and extended service life.
*2 Integrating the optional DFCa vacuum assist module optimizes suction lift performance and ensures rapid hose recovery during high-viscosity pumping operations.
Specification
DFBa type: Roller method Maximum flow rate – 480 L / h Maximum discharge pressure 0.8MPa
DFCa type: Roller method Maximum flow rate – 14,000 L / h Maximum discharge pressure 0.4MPa
| model | Discharge rate [L/h] | Maximum discharge pressure[MPa] | power [kW] | Flange caliber (JIS10K) | Reference allowable particle size[mm] | mass [kg] | |
|---|---|---|---|---|---|---|---|
| 50Hz | 60Hz | ||||||
| DFBa013B | 60 | 72 | 0.8 | 0.4 | 15A | 3.3 | 15 |
| DFBa016C | 140 | 168 | 0.8 | 0.4 | 20A | 4 | 22 |
| DFBa022E | 400 | 480 | 0.8 | 0.4 | 25A | 5.5 | 31 |
| DFCa030A | 650 | 780 | 0.4 | 0.4 | 32A | 7 | 71 |
| DFCa040B | 1,400 | 1,680 | 0.4 | 0.75 | 40A | 8.8 | 120 |
| DFCa050C | 2,400 | 2,800 | 0.4 | 1.5 | 40A | 10 | 180 |
| DFCa060D | 4,700 | 5,600 | 0.4 | 3.7 | 50A | 13.8 | 290 |
| DFCa070E | 11,700 | 14,000 | 0.4 | 3.7 | 65A | 16.3 | 500 |
Flange material: PVC / SUS304 compatible
Discharge amount is the value when fresh water, normal temperature, and pushed state, and varies depending on the liquid properties and piping configuration.
Pulsation occurs in this pump. It is recommended to increase the pipe connection diameter or install an air chamber.
Power unit
Standard motor specifications: 3-phase 200V, 50 / 60Hz, inverter compatible motor IP44 (outdoor specifications), E type
* Inverter body is not included.
Drive part
Benefits of hose squeezing with rollers
In the DFBa series and DFCa series, the hose is squeezed by a roller, so there is less stress on the hose and deterioration of the hose can be minimized.
Small motor / Low power consumption can be operated because the required torque of the motor is small.
Adjust the number of spacers according to the required discharge pressure to adjust the force to squeeze the hose.
The hose and roller are lubricated with grease, and the hose cannot be replaced easily because it is not an oil bath system.
Material
Hose material
| Model | Body |
|---|---|
| NR (Natural rubber) | Standard hose. For liquids such as diluted acid, alkali, alcohol, etc. in addition to neutral water |
| NBR (Nitrile rubber) | For liquids with a lot of oil _and fat |
| EPDM (Ethylene propylene rubber) | Concentrated acids, ketones, alcohols |
| NR-A (NR food grade) | NR(Natural rubber) based food hose |
| NBR-A (NBR food grade) | NBR (Nitrile rubber) based food hose |
| Hypalon | Nitric acid, chromic acid, hydrochloric acid, sodium hydroxide, potassium hydroxide, hydrogen peroxide, etc. |
Option
Vacuum unit (DFCa type compatible option)
It reduces the pressure in the pump casing and helps the hose return to its original shape.
It is effective when the hose is difficult to restore, such as when transferring a high-viscosity liquid with a maximum of 60,000 mPa · s (cP) or when the suction lift is high.















