US NICHWELL NVD-8 5.6 cfm Corrosion-Resist Commercial Grade 2-Stage Vacuum Pump

Two-Shift adjustable gas ballast valve satisfies different requirements of condensable vapor (such as water vapor) to be exhausted out of pump in different processes. Dual protection of oil anti-sucking back ensures vacuum system from oil contamination when pump stops running. Forced oil circulation system consisting of oil pump and constant pressure oil supply mechanism ensures that the pump runs stably with constant performance. The product can be easily maintained and repaired due to less mechanical components involved.

Key Features

Adjustable gas ballast
Built-in oil back-flow prevention check valve
Internal forced oil cycling system
Integrated cylinder structure
Exhaust filter with easy-to-change replaceable filter element
Heavy duty structure and designed for reliable long time operation
Low noise
All necessary fittings and filter included for immediate use

Typical Applications

Refrigeration industry,

Automatic pumping line of refrigerator;
Air-condition water dispenser;
Refrigerant charging machine;
Helium leak detector and helium recovery system etc.

Medical industry:

Plasma sterilizer
Vacuum freeze drying, vacuum mixing etc

Analytical instruments

Spectrometer
Scanning electron microscope,
Leak detector, physical and chemistry analytical instrument etc.

Power industry， such as SF₆gas recovery, detecting instrument, oil filter etc.
Electronics, semi-conductor industry
Vacuum oven, glove box
Sapphire furnace, single crystal furnace
Vacuum annealing,evaporation coating
Sputtering equipment and ion plating and plasma cleaning

Model	NVD-4	NVD-8	NVD-16	NVD-24	NVD-30	NVD-48	NVD-65
Displacement (cfm) @ 50 Hz	2.3	4.6	9.4	14.1	17.6	28.2	38.2
Displacement (cfm) @ 60 Hz	2.8	5.6	11.3	16.9	21.2	33.9	45.9
Ultimate partial press. gas ballast closed (Pa)	5 x 10 ^-2	5 x 10^-2	4 x 10^-2	4 x 10^-2	4 x 10^-2	4 x 10^-2	4 x 10^-2
Ultimate total press. gas ballast closed (Pa)	5 x 10 ^-1	5 x 10^-1	4 x 10^-1	4 x 10^-1	4 x 10^-1	4 x 10^-1	4 x 10^-1
Ultimate total press. gas ballast open (Pa)	3	3	8 x 10^-1	8 x 10^-1	8 x10^-1	8 x10^-1	8 x 10^-1
Power Supply	Single/3-Phase	Single/3-Phase	Single/3-Phase	Single/3-Phase	Single/3-Phase	3-Phase	3-Phase
Power Rating (kW)	0.4/0.37	0.4/0.37	0.75/0.55	1.1/0.75	1.1	1.5	2.2
Intake and exhaust DN	KF16/25	KF16/25	KF25	KF25/40	KF25/40	KF40	KF40
Oil capacity (L)	0.6 -1.0	0.6-1.0	0.9-1.5	1.3-2.0	1.3-2.0	3.3-4.5	3.3-4.5
Motor speed (rpm) @50 Hz	1440	1440	1440	1440	1440	1440	1440
Motor speed (rpm) @60Hz	1720	1720	1720	1720	1720	1720	1720
Ambient temp (°C)	5-40	5-40	5-40	5-40	5-40	5-40	5-40
Noise level (dB)	<56	<56	<58	<58	<58	<62	<62
Net weight (kg)	19	20	33	35	37	62	65