Precision Micro Pump Head

Application area Pressure conveyance of anorganic and organic media, low-viscous slurries,... more

Application area

Pressure conveyance of anorganic and organic media, low-viscous slurries, suspensions, emulsions, and viscous concentrates up to 500 cP etc.

Pressure conveyance of liquids for sterile filtration.

Controlled metering of solutions in lysimeter tests and field cultivation experiments.

Controlled metering of reagents, additives, and other auxiliary agents in automated chemical processes.

Fine-metering and conveyance of gases.

Sample collection for environmental analytics.

Product specification

Constant running, valveless precision pump head with stepless variable delivery rate by precision-mechanical change of the piston stroke. Medium-contacting components made of chemically resistant, biocompatible and abrasion-proof anorganic corund or organic fluoropolymer materials PVDF and ETFE.

Mounting: Directly adaptable to any front panel.

Mode of operation:

The pump cylinder is mounted slewably, the piston ground in with a tolerance of 0.1 µm rotates during the pump motion thus executing a "tumbling" movement. The delivery chamber ground in the lower part of the piston which executes an elevating motion at suction is turned to the outlet side, while the piston performs the respective backward motion and discharges the conveying medium. The delivery rate is precisely adjustable in a wide range with micrometer adjustment by alteration of the pump head incliniation and the respective change of the piston stroke way in the cylinder. The stroke length is variable from 0 to 100 %, a fine-graduation from 0 to 10 on the dial scale ensuring the fine-adjustment range.

Handling:

The delivery rate can be precisely adjusted in a wide range with micrometer adjustment by alteration of the pump head incliniation and the respective change of the piston stroke way in the cylinder.

Turning the handy knurled graduated collar with scale-of-ten and subdivided fine-graduation to the left side increases the stroke volume of the piston, the respective turn to the right side decreases the stroke volume. In combination with the fixed scale of 0 to 4 covered by the graduated collar and its dial scale-of-ten, adjustment of delivery rates is very precise and reproducible.

The maximum delivery rates correspond to position 4 on the fixed scale and position 0 on the dial scale (see figure). The decline of delivery rates occurs linearly with the decline of scale values, the positions 0 on fixed and dial scale indicating a delivery rate of zero.

Technical specification

Material of pump head housing: PVDF or ETFE

Max. delivery rate: 100 µl/stroke

Max. operating pressure: 6.9 bar

Conveying medium: liquids

Pipe connection: for pipes with outside Ø 6.4 mm or internal thread UNF 1/4"-28

General Information Precision delivery pumps of system FMI ® are efficient single-piston... more

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General Information

Precision delivery pumps of system FMI^® are efficient single-piston pumps for continuous use, the sturdiness of which other pumps can hardly compete with. They are extremely versatile in use and suitable even for viscous and suspended particles-containing liquid media.

FMI^®-precision delivery pumps work without valves. Their cylinders are swivelling and have involved, opposite standing medium inlet and outlet connections at the lower cylinder part. The piston working in the cylinder is mounted slewably and rotatably at the same time. A return passage is precisely ground lengthwise in the piston. During pump movement the piston rotates around its axis. At suction during the piston stroke the cylinder is filled as usual. When reaching the upper dead point, the return passage has moved to the outlet side by rotation of the piston; during the following backward motion of the piston the medium to be delivered is discharged.

By retracting the pump head by means of micrometer adjustment, the piston stroke and with it the delivery rate can precisely be altered and adjusted in a wide range.

Accessories: adapter items 58385, 58386, 58376, 58381

Item	Image	Delivery volume µl/stroke	max. Betr.-Druck¹ bar	Medium	Werkstoff Pumpenkopf	Anschluss	Einheit Stück	Price Euro*
97869	Precision Micro Pump Head	25	6,9	gasförmig	PVDF	für Rohre Außen-Ø 6,4 mm	1	1,693.00
19114	Precision Micro Pump Head	25	1,4	gasförmig	ETFE	für Rohre Außen-Ø 6,4 mm	1	1,879.00
19115	Precision Micro Pump Head	25	1,4	gasförmig	ETFE	Innengewinde UNF 1/4"-28	1	2,462.00
19116	Precision Micro Pump Head	25	1,4	flüssig	ETFE	für Rohre Außen-Ø 6,4 mm	1	2,102.00
19117	Precision Micro Pump Head	25	1,4	flüssig	ETFE	Innengewinde UNF 1/4"-28	1	2,102.00
97873	Precision Micro Pump Head	50	6,9	flüssig	PVDF	für Rohre Außen-Ø 6,4 mm	1	2,064.00
19118	Precision Micro Pump Head	50	6,9	flüssig	PVDF	Innengewinde UNF 1/4"-28	1	2,064.00
97830	Precision Micro Pump Head	100	6,9	flüssig	PVDF	für Rohre Außen-Ø 6,4 mm	1	2,064.00