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Spectra/Chrom® Peristaltic Pumps

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MP Pump The pump is generally one of the first things encountered by the solvent in a chromatographic separation. Peristaltic pumps are the most commonly used pump type for low pressure liquid chromatography. In these pumps, the only wetted materials are a piece of tubing, generally the same tubing used elsewhere in the system; this limits the number of materials that the solvent contacts.

Peristaltic pumps operate by pinching closed a point on a piece of tubing. This pinched point is then moved along the tubing to force the liquid to move. Using this model, the pump rate obviously depends upon both the size of the tubing and the speed that the pinch point moves.

As a general convenience to provide for maximum flexibility in choosing a pumping system, most peristaltic pump heads (the part that holds the tubing and pinches it shut) are sold separately from the pump drive (the part that has the motor and makes the pump head work.) This separation allows you to independently control the tubing size and the drive speed allowing you to select a tubing size convenient for you and a flow rate suitable for your chromatography.

We manufacture 3 different pump drives and a variety of pump heads for use in low-pressure liquid chromatography. These same items are also frequently use in general-purpose laboratory pumps.

The 2 pump drives we manufacture are the MP-1 (part number 124868) and the MP-2 (part number 146821) drives. The MP-1 and MP-2 drives can accept up to 3 pump heads. The MP-1 and MP-2 pump drives also have remote control capabilities which allow them to be stopped remotely (e.g. by a CF-1 fraction collector at the end of a run).

Two different styles of pump heads are available. The most common pump head is the Fast-Load pump head. This pump head accepts any flexible tubing with a wall thickness of 1/16" (1.6 mm) and an outer diameter of 7/16" (11.1 mm) or less. The tubing can be loaded into this pump head without removing the pump head from the pump.

The second style of pump head is the standard pump head. The standard pump heads each accept only a single size of tubing. To load or unload the tubing from the pump head, the pump head must first be removed from the pump.

Peristaltic Pump Drive Specifications
MP-1 MP-2
Pump Speed to 60 rpm to 600 rpm
Power Requirements 115 +/- 20 VAC (124868)
230 +/- 40 VAC (124869)

100 VA
115 +/- 20 VAC (146821)
230 +/- 40 VAC (146822)

400 VA
Line Frequency 45 to 65 Hz
Dimensions
(without pump heads)
w x h x l
5.4" x 9.3" x 12.3"
14 x 24 x 31 cm
5.4" x 9.3" x 12.3"
14 x 24 x 31 cm
Operating Temperature 0°C to 40°C, noncondensing

Pump Head Specifications
Tubing Number 13 14 16 17 18 15
Tubing Size
(OD x ID)
5/32" x 1/32"
(4 x 0.8 mm)
3/16" x 1/16"
(4.8 x 1.6 mm)
1/4" x 1/8"
(6.3 x 3 mm)
3/8" x 1/4"
(9.5 x 6.3 mm)
7/16" x 5/16"
(11 x 8 mm)
3/8" x 3/16"
(9.5 x 4.8 mm)
Wall Thickness 1/16"
(1.6 mm)
1/16"
(1.6 mm)
1/16"
(1.6 mm)
1/16"
(1.6 mm)
1/16"
(1.6 mm)
3/32"
(2.4 mm)
Flow Rate with MP-1 Pump (ml/min) 0.03 - 3.6 0.11 - 12.6 0.4 - 48 1.4 - 168 1.9 - 228 0.83 - 100
Flow Rate with MP-2 Pump (ml/min) 0.36 - 36 1.3 - 126 5 - 480 17 - 1680 23 - 2280 10 - 1000
Recommended Pump Head Fast Load
146924
Fast Load
146924
Fast Load
146924
Fast Load
146924
Fast Load
146924

Optional Pump Head Standard
146809
Standard
146811
Standard
146813
Standard
146817
Standard
146819
Standard
146815

Tubing Part Numbers:
Silicone, 3m
Silicone, 15m
Vinyl, 3m
Vinyl, 30m
LPF, 3m
123732
123734
123728
123730
123736
123746
123748
123742
123744
123750
123760
123762
123756
123758
123764
123856
123858
123852
123854
123860
123788
123790
123784
123786
123792
123842
123844
123838
123840
123846

Additional mounting hardware is required to mount 2 or 3 pump heads to a pump drive. Part number 146823 is required to mount 2 pump heads and part number 146828 is required to mount 3 pump heads.



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Page last updated 05 September 2012
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