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Chemyx Nexus Serial Ultra High-Pressure Pumps are designed to solve the toughest fluid delivery problems; from micro-flow to scale-up and pilot plant for chemicals, Oil & Gas, and other industries. The high-pressure pump system provides constant flow, constant pressure, and flow or pressure programming. The system has two configurations: single-pump or dual-pump. With the continuous valve system (CVS), the dual pump system will provide a continuous constant flow operation mode. The piston-driven pump module uses a single-speed gear train. Nitronic 50 is the standard material for cylinders, pistons, and caps, Standard seals are graphite-impregnated Teflon, providing long life under harsh operating conditions.

Technical Specifications
Nexus 75 Nexus 150 Nexus 260 Nexus 350 Nexus 700 Nexus 1500
Cylinder Capacity 2042 1000 360 250 127 66
Power 100-120 VAC,200-240-VAC ,50/60 Hz 100-120 VAC,200-240-VAC ,50/60 Hz 100-120 VAC,200-240-VAC ,50/60 Hz 100-120 VAC,200-240-VAC ,50/60 Hz 100-120 VAC,200-240-VAC ,50/60 Hz 100-120 VAC,200-240-VAC ,50/60 Hz
Dimensions 48(D) x 29(W) x 94(H) 48(D) x 29(W) x 94(H) 48(D) x 29(W) x 93(H) 48(D) x 29(W) x 93(H) 48(D) x 29(W) x 115(H) 48(D) x 29(W) x 115(H)
Weight(kg) 40.8 36.5 34.0 34.9 38.0 38.1
Flow Rate (ml/min) 0.01-800 0.01-400 0.001-140 0.00001-100 0.00001-50 0.00001-26
Flow Rate Accuracy ± 0.5% ± 0.5% ± 0.3% ± 0.3% ± 0.3% ± 0.3%
Maximum Seal Leakage 2 1.5 1 0.5 0.25 0.2
Flow Rate Display Resolution 0.01 µL/min 0.01 µL/min 0.01 µL/min 0.01 µL/min 0.01 µL/min 0.01 µL/min
Displacement 74.176 36.346 13.085 9.087 4.636 2.403
Refill Time 2.5 minutes 2.5 minutes 2.5 minutes 2.5 minutes 2.5 minutes 2.5 minutes
Refill or Depressurization on Rate 0.01-800 0.01-400 0.001-140 0.00001-100 0.00001-50 0.00001-26
Pressure Range 0- 1100 psi 0- 2200 psi 0- 3800 psi 0- 5000 psi 0- 10000 psi 0- 22000 psi
Pressure Accuracy ±0.5 % of full scale at constant temperature ±0.5 % of full scale at constant temperature ±0.5 % of full scale at constant temperature ±0.5 % of full scale at constant temperature ±0.5 % of full scale at constant temperature ±0.5 % of full scale at constant temperature
Pressure Repeatabiility ±0.5 % of full scale within 48 hours at constant temperature ±0.5 % of full scale within 48 hours at constant temperature ±0.5 % of full scale within 48 hours at constant temperature ±0.5 % of full scale within 48 hours at constant temperature ±0.5 % of full scale within 48 hours at constant temperature ±0.5 % of full scale within 48 hours at constant temperature
Zero Pressure Drift ±0.25 % of full scale within 48 hours at constant temperature ±0.25 % of full scale within 48 hours at constant temperature ±0.25 % of full scale within 48 hours at constant temperature ±0.25 % of full scale within 48 hours at constant temperature ±0.25 % of full scale within 48 hours at constant temperature ±0.25 % of full scale within 48 hours at constant temperature
Pressure Display Resolution 0.1 of selected unit 0.1 of selected unit 0.1 of selected unit 0.1 of selected unit 0.1 of selected unit 0.1 of selected unit
Ambient Temperature Range 5 - 40°C 5 - 40°C 5 - 40°C 5 - 40°C 5 - 40°C 5 - 40°C
Humidity 95% maximum 95% maximum 95% maximum 95% maximum 95% maximum 95% maximum
Dead(Headspace) Volume(ml) 5.05 2.8 1.42 1.25 1.25 1.25
Pollution on Degree 2 2 2 2 2 2
Installation Category II II II II II II
Maximum Altitude 2000m 2000m 2000m 2000m 2000m 2000m