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General Description
General Description
The Pneumatic Pump K–1900 has been developed for solvent delivery within
the following fields:
• Process chemistry
• Column packing
• Preparative chromatography.
It is powered by pressurized air. It can deliver liquids with an adjustable flow
rate. Since no electrical connection is required, the Pneumatic Pump K–1900 is
suitable for operation in explosion protected environments.
The new Pneumatic Pump K-1900 has been developed for constant pressure
applications. It is suitable for packing high performance columns (microbore,
analytical and preparative) up to 1000 bar. The flow is highly reproducible and
only little maintenance efforts are required.
It features a double-piston design and can be configured with four different
pump heads to meet a broad range of requirements in flow and pressure
ranges:
100 ml pump head (0.1 – 99.9 ml/min), stainless steel, up to 1000 bar
250 ml pump head (0.1 – 249.9 ml/min), stainless steel, up to 200 bar
500 ml pump head (0.1 – 499.9 ml/min), stainless steel, up to 100 bar
1000 ml pump head (0.1 – 999.9 ml/min), stainless steel, up to 50 bar
The names of the pump heads have historical reasons. You can also operate
any of the mentioned pump heads with our Preparative HPLC Pump K-1800. In
the case of the Pneumatic Pump K–1900 the piston strokes operate with a
higher frequency and therefore flow rates can be much higher than specified on
the pump head.
The characterisics of flow and liquid pressure for the K-1900 with the different
pump heads are listed in Table 2, „Technical data of individual pump heads“ on
page 6.
Pump heads can be interchanged by loosening only four screws. Experienced
users can disassemble the heads for simple maintenance tasks like cleaning,
changing piston seals, etc.
A cooling device (heat exchanger) to be mounted on the pump head is
available. It allows to operate the Pneumatic Pump K–1900 with supercritical
solvents as CO
2
for Extraction and Supercritical Fluid Chromatography.
The power unit of the pump consists of a pneumatic piston which is set in
motion by compressed air. The pneumatic power will be trans-mitted to the
piston rods by the power transmit lever.
