Bio-Chem Fluidics 139SP micro-pump manifold: precision dispensing in an integrated module
The 139SP Series is the manifold version in the Bio-Chem Fluidics Micro-Pump family. The pump delivers a discrete, repeatable liquid volume of 20 to 60 µl per cycle at a maximum flow rate of 7,2 ml/min. Performance is identical to that of the 130SP, but the 139SP is specifically designed for direct mounting on a manifold instead of via external tubing connections.
The fluid path runs through the manifold interface on the underside of the pump. Inlet and outlet are in the pump base, so all fluid connections run internally in the manifold. This eliminates external tubing and fittings between multiple pumps, reduces installation space and simplifies instrument assembly.
Applications of the 139SP micro-pump manifold
The 139SP is ideally suited for analytical OEM instruments where multiple fluid streams are combined in one module, such as multichannel dosing systems, combinations of pumps and isolation valves on one manifold block, or compact analysis systems with limited installation space. Bio-Chem Fluidics has supplied manifold solutions for systems with up to 84 Micro-Pumps on one block. The pump is self-priming and can draw liquid from an unpressurised reservoir up to 1,3 metres below the pump.
Manifold design and integration
The 139SP is supplied with the mounting screws and check valves needed for mounting on a manifold. A locating pin in the pump base ensures accurate and repeatable positioning. Bio-Chem Fluidics also supplies custom manifolds on request, from simple blocks for two pumps to complex configurations with branched fluid paths for larger systems. Contact Inacom for the manifold interface drawings and design requirements.
Choice of material
The 139SP is available in three housing materials. PTFE offers the highest chemical inertness for the toughest applications, supported by PEEK backing plates that ensure structural integrity without touching the medium. PEEK offers high chemical resistance with better dimensional accuracy for precision manifold interfaces. POM is a cost-effective choice for less aggressive media.
For the diaphragm, the choice is between PTFE (maximum inertness) and EPDM (for aqueous applications). For the check valves, you can choose from FFKM (for the harshest chemical conditions), FKM (for solvents and oils) or EPDM (for aqueous applications).
Operation and control
The 139SP has the same electrical specifications as the 130SP. The pump can be cycled at a maximum frequency of 2 Hz. The fixed "on" time is 150 ms; the minimum "off" time is 350 ms. The flow rate is reduced by extending the "off" time. The pump runs on 12 VDC or 24 VDC and effectively consumes 1,2 Watt at maximum cycle frequency. The wiring is PTFE-coated.
Properties
- Dispense volume: 20, 30, 40, 50 or 60 µl per cycle
- Setpoint accuracy: ±10%
- Repeatability: ±5%
- Max. flow rate: 7,2 ml/min (at 60 µl/cycle, 2 Hz)
- Internal volume: 105 µl
- Mounting: manifold mounting via 2x #4-40 mounting screws and locating pin
- Housing material: PTFE (with PEEK backing plates), PEEK or POM
- Diaphragm material: PTFE or EPDM
- Valve materials: FFKM, FKM or EPDM
- Power supply: 12 VDC or 24 VDC, 4 Watt
- Max. cycle frequency: 2 Hz
- Fixed "on" time: 150 ms; minimum "off" time: 350 ms
- Self-priming, suction lift up to 1,3 m
- Outer diameter: 25,4 mm
- Total length: 53,3 mm
- Mounting screws and check valves included
Technical specifications
| Feature | 20 µl | 30 µl | 40 µl | 50 µl | 60 µl |
|---|
| Max. flow | 2,4 ml/min | 3,6 ml/min | 4,8 ml/min | 6,0 ml/min | 7,2 ml/min |
| Accuracy | ±10% | ±10% | ±10% | ±10% | ±10% |
| Repeatability | ±5% | ±5% | ±5% | ±5% | ±5% |
| Internal volume | 105 µl | 105 µl | 105 µl | 105 µl | 105 µl |
| Electrical | 12 VDC | 24 VDC |
|---|
| Power | 4,0 W | 4,0 W |
| Power consumption | 0,32 A | 0,16 A |
| Eff. continuous power | 1,2 W | 1,2 W |
