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Eldex Pumps, Models A, B, AA
• Accurate, reproducible metering
Precise metering at high pressure is attained by a positive
displacement, reciprocating piston assembly. The piston is driven by a
constant speed motor via a specially contoured cam. The cam allows the piston
to rapidly intake and deliver a smooth, constant volume of fluid to the end of
the piston stroke. Thus, motor efficiency is maximized and pulsation
minimized.
The piston’s stroke length is fixed by a precision
micrometer which is simple to use and assures accurate, reproducible metering.
The piston assembly is uniquely designed to permit an even
application of the force driving the piston – a detail which helps to insure
exact, reliable liquid transfer and extended seal life.
Specifications:
Wetted parts: Type 316 stainless steel, Kel-F™,
sapphire, ruby, Fluoroloy G,™
gold
Reproducibility: ±0.3%
Inlet connections: 1/4"-28 fittings for 1/8" Teflon ™
tubing
Outlet connections: 1/16" fitting with 10-32 threads
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Model A
Flow rates from 0.05 to 3.0 mL/min
Precise control at low flow rates
Pressures up to 5000 psi
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Model B
Designed to deliver high flow rates
Flow rates of up to 32 mL/min
Pressures up to 5000 psi
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Model AA
Dual channels for applications requiring minimal pulsation
0.2 to 10.0 mL/min @ 5000 psi
Liquid ends may be operated independently or in parallel.
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Cat. No. |
Flow Rate
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Max. Pressure |
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A-120-S |
0.2-6.0 mL/min
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1000 psi
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A-30-S
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0.05-1.5 mL/min |
5000 psi
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A-60-S
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0.1-3.0 mL/min
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2500 psi
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B-100-S-4
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1.0-32.0 mL/min
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2000 psi |
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AA-60-S
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0.2-6.0 mL/min
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5000 psi
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AA-100-S
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0.2-10.0 mL/min
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5000 psi
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PEEK Pumps
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A-120-SPK |
0.2-6.0 mL/min
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1000 psi
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A-30-SPK
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0.05-1.5 mL/min
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4000 psi
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A-60-SPK
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0.1-3.0 mL/min
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2500 psi |
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B-100-SPK
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0.2-8.0 mL/min
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4000 psi
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Eldex Pumps, Model VS
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Model VS
Remote Control Capabilities
Reliable, durable design
0.025 to 40.0 mL/min @ 5000 psi
Variable speed high pressure metering pumps.
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Eldex remote control, variable speed high pressure metering
pumps can meet nearly any solvent delivery requirement. Flow rates range from
0.025 to 40 mL/min. at pressures up to 5,000 psi.
Convenient Remote Control: Any
controller can precisely set the flow rate of the VS metering pump, as a wide
variety of voltage and current loop control options are available on the pump
controller. Alternatively, a potentiometer on the front panel provides for
manual flow rate control.
Durable Design: Eldex
VS pumps utilize a unique technology which allows us to vary the speed of
reliable AC synchronous motors, the same type of motors which provide years of
service to our mechanical metering pumps.
The wetted materials are carefully chosen for
corrosion resistance. The piston is sapphire, and the inlet and outlet valves
incorporate dual sapphire seats and ruby balls. Piston seal materials have
excellent chemical compatibility characteristics, and our liquid ends are made
of type 316 stainless steel. For specialized applications, liquid ends machined
from inert PEEK are available.
| Cat. No. |
Flow Rate |
Max. Pressure |
| A-30-VS |
0.025-1.5 mL/min |
5000 psi |
| A-60-VS |
0.05-3.0 mL/min |
2500 psi |
| A-120-VS |
0.1-6.0
mL/min |
1000 psi |
| B-125-VS |
0.2-10.0
mL/min |
5000 psi |
| B-125-VS-4 |
1.0-40.0
mL/min |
1250 psi |
| Biocompatible PEEK Pumps |
| A-30-VSPK |
0.025-1.5
mL/min |
4000 psi |
| A-60-VSPK |
0.05-3.0
mL/min |
2500 psi |
| A-120-VSPK |
0.1-6.0
mL/min |
1000 psi |
| B-125-VSPK |
0.2-10.0
mL/min |
4000 psi |
Eldex Pump Spare Parts
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Seals for 1/8" pistons
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Cat. No.
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Description
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EL-1022
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Fluoroloy G piston seal kit
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EL-1180
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Fluoroloy G Seal replacement kit: 2 seals and 2 backup seals |
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EL-1181
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Fluoroloy G Seal replacement kit: 5 seals and 5 backup seals
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EL-1272
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PEEK pump Piston seal assembly kit: Fluoroloy G metal-free seal, backup seal,
aligning rod and hex key
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EL-1273
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PEEK pump seal replacement kit: 2 Fluoroloy G metal-free seals and 2 backup
seals |
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Valves for models A, B, AA
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EL-1369
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Inlet valve assembly
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EL-1372
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Outlet valve assembly
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EL-1381
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Check valve cartridge (for inlet or outlet)
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EL-1377
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PEEK Inlet valve assembly
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EL-1378
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PEEK Outlet valve assembly
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Pistons
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EL-1029
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Models A, B, AA, and E sapphire piston, SN < 10,000
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EL-1366
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Models A, B, AA, and E sapphire piston, SN > 10,000
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Liquid end assemblies
(Includes inlet and outlet valve, cylinder, seals and retainer. Piston not
included.)
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EL-1395
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For Models A, B, AA.
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EL-1397
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For PEEK Models A, B, AA
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