Double Head Piston Pumps

HD2-200

High pressure pump for preparative LC.

The HD-200 pump is a dual piston precision metering pump designed for HPLC as well als MPLC. The pistons are mounted parallel. The housing of the check valves and the liquid ends are manufactured out of stainless steel 1.4571 or PEEK. The pistons as well as the check valve seats are made of saphire, while the material of the ball is ruby. the PTFE pump seal contains a little spring, shich helps to seal the inner flange around the piston. The optimised design ensures virtually pulse-free and stable solvent delivery.
The flow rate of the pump can be varied by the rotation speed of the pump motor. The maximum flow rate (depending on the pump model) is 1 l/min. The operating pressure of the pump is continuously measured by an inductive pressure sensor and minitored on at the bright LED and LCD display on the front panel.
The pump can be externally controlled. A computer jack allows flow rate rontrol
(0-10V, 0-20 mA) for applications such as high pressure gradient operation together with a second pump and a mixing chamber. The pressure can be recorded by a 0-10 V signal. Pressure limits can be selected to protect the system during unattended operation.

Flow-Rate	Max.Pressure
0,5-50 ml	4.400
1-100 ml	3.000
2-200 ml	1.500
4-400 ml	730
6-600 ml	600
7-700 ml	350
10-1000ml	350

 

HD 2-300

The HD 2-300 is a precision metering pump designed for high performance liquid chromatography (HPLC).
The pistons and the valve seats are made of sapphire, the valve balls of ruby. The valve-casing and the pump heads are made of stainless steel or PEEK.
The pressure is recorded by a sensor and then displayed in 'psi'. A minimum and maximum pressure can be set for security shut off.
The flow range is controlled by the motor speed. The pump can be controlled externally by RS 232 or anlag 0-10V DC / 0-20mA.

Material	Flow Rate
0,5-50 ml	4350
1-100 ml	4350
2-200 ml	2900
4-400 ml	1450

 

The HD 2-400 is a precision metering pump designed for high performance liquid chromatography (HPLC).
The pistons and the valve seats are made of sapphire, the valve balls of ruby. The valve-casing and the pump heads are made of stainless steel or PEEK.
The pressure is recorded by a sensor and then displayed in 'psi'. A minimum and maximum pressure can be set for security shut off.
The flow range is controlled by the motor speed.
The pump can be controlled externally by RS 232 or 0-10V DC / 0-20mA..

Material	Flow Rate
0,1-10 ml	5800
0,5-50 ml	2900
5-100 ml	725
10-200 ml	363

 

The pump features 10 separate heads which are combined in 2 blocks per 5.
The both blocks are combined with the mechanics in that kind that a 5 channel double head pump emerges from connecting the blocks.
The pump heads are from stainless steel 1.4571, the vlaves assemble from ruby and sapphire (ceramics). The pistons are either from sapphire or ceramics, independent of model of the pump heads.
For controlling of the pump a processor controlled DC drive is beeing applied. The external controll is versatile, whether analogue (0-10V, 0-20mA) or digital (RS232).
For monitoring 2 more signals (flow and operation) are available. The massive designed mechanics allow a high operation pressure. The pressure information in the lower table concerning to one channel. At the 10ml version 10 channels with 725 psi per can be operated e.g.

Pump heads of other materials,Peek, Titan i.e., available on request