Welch Vacuum 2028 Self-Cleaning Dry Vacuum System - Manual (Page 23)

Section 7: SPECIFICATION
7.10 Specifi cation Table
Welch 2025 2026 2027 2028
Model (Analog) (Analog) (Digital) (Digital)
Free Air Displacement
CFM (L/min) @ 60 Hz
1.2 (34) 1.1 (32) 1.1 (32) 1.2 (35)
m3/hr (L/min) @ 60 Hz 1.7 (28) 1.6 (27) 1.6 (27) 1.8 (29)
Vacuum Level, in Hg 29.6 29.85 29.85 29.85
Ultimate Pressure, Torr (mbar) 9 (12) 2 (2.7) 2 (2.7) 2 (2.7)
Motor Horsepower (watts) 1/5 (150) 1/5 (150) 1/5 (150) 1/5 (150)
Bump/Anti-Foam Button N/A N/A N/A YES
Tubing needed, I.D. in (mm) 1/4" (7) 1/4" (7) 1/4" (7) 1/4" (7)
Intake / Exhaust Thread NPT 3/8 3/8 3/8 3/8
Weight, lbs (Kg) 30 (13.6) 30 (13.6) 30 (13.6) 30 (13.6)
Programmable
Repeat Function
N/A N/A N/A YES
Store Programs N/A N/A N/A up to 5
Timer N/A N/A N/A 1-999 min.
Overall Dimensions
L in. (cm)
13.6 (42.2) 13.6 (42.2) 13.6 (42.2) 13.6 (42.2)
W in. (cm) 12 (30.5) 12 (30.5) 12 (30.5) 12 (30.5)
H in. (cm) 11.3 (28.7) 11.3 (28.7) 11.3 (28.7) 11.3 (28.7)
Shipping Weight, lbs (kg) 36 (16.3) 36 (16.3) 36 (16.3) 36 (16.3)
Catalog Number
Wired for 115V, 60Hz, 1 Ph
202501 202601 202701 202801
with N. American 115V Plug 1.5A 1.5A 1.5A 1.5A
Catalog Number
Wired for 230V, 50Hz, 1 Ph
202503 n/a 202703 202803
with Cont. Euro (Schuko) Plug 0.75A 0.75A 0.75A
Catalog Number
Wired for 100V, 50/60Hz, 1 Ph
202505 n/a 202705 202805
with N. American 115V Plug 1.5A 1.5A 1.5A
Altitude 2000m
Max. relative humidity of 80% for temperatures up to 31C decreasing linearly to 50% at 40C
Supply Voltage +/-10%
Pollution Degree 2
Installation Category II
Models 202503 and 202703 conform to ATEX II 3G T4. [ATEX Group II (Explosive Atmospheres),
Category 3G (Gases), Temperature T4 (135 C)]
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