【Back】 VRD Dual Stage Vacuum Pumps
Product:VRD
Excellent performance

Features:

- 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 pollution when pump stops running and needs to be easily restarted.

- Forced oil circulation system consisted of oil  pump and constant pressure oil supply mechanism ensures stable running of the pump.

- Less components are used, easy to maintain and repair.

MODEL VRD-4 VRD-6 VRD-8 VRD-16 VRD-24 VRD-30 VRD-48 VRD-65

Displacement speed

m3/h (L/s)

50Hz 4 (1.1) 8 (2.2) 8 (2.2) 16 (4.4) 24 (6.6) 30 (8.3) 48 (13.3) 65 (18)
60Hz 48 (1.3) 9.6 (2.6) 9.6 (2.6) 19.2 (5.2) 28.8 (7.9) 36 (9.9) 57.6 (16) 78 (21.6)
Ultimate partial pressure gas ballast closed (Pa) 5x10-2 5x10-2 5x10-2

4x10-2

4x10-2 4x10-2 4x10-2 4x10-2
Ultimate total pressure gas ballast closed (Pa) 5x10-1 5x10-1 5x10-1 4x10-1 4x10-1 4x10-1 4x10-1 4x10-1
Ultimate total pressure gas ballast open (Pa) 3 3 3 8x10-1 8x10-1 8x10-1
8x10-1 8x10-1
power supply Single/Three phase Single/Three phase Single/Three phase Single/Three phase Single/Three phase
Single/Three phase Three phase Three phase
Power rating (kW)
0.4/0.37

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 (mm) KF16/25 KF16/25 KF16/25 KF25 KF25/40 KF25/40 KF40 KF40
Oil capacity (L) 0.6~1.0 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) 50Hz 1440 1440 1440 1440 1440 1440 1440 1440
60Hz 1720 1720 1720  1720 1720 1720 1720 1720
Ambient temperature (°C) 5 - 40 5 - 40 5 - 40 5 - 40 5 - 40 5 - 40 5 - 40 5 - 40
Noise level (dB)

≤56

≤56

≤56

≤58

≤58 ≤58 ≤62 ≤62
Net weight (kg) 19 20 20  33 35 37  62 65