Page 20 - Gast Rocking Piston Compressors and Vacuum Pumps

71R/72R Series to
Twin Cylinder Vacuum Pumps 5.5

CFM

Models 71R645/71R655
28 inHg max. vacuum
4.5 CFM open flow (60 Hz)
Models 72R547/72R555 Staged
29 inHg max. vacuum
2.6 CFM open flow (60 Hz)
Models 72R645/72R655
28 inHg max. vacuum
5.5 CFM open flow (60 Hz)

Product Dimensions
(inches, mm) 2 x 4.00 8.25 D303X CENT. 8.50 D304X
101.6
2 x 2.00 209.6 MOTOR 215.9 MOTOR
50.8

Ø 5.63
Ø 143
8.19
208.0 2 x 7.25 Terminal
184.2 on units
with
T in the
model
number
8.03
7.98 CENT.
1.76 1/4 x 20 203.8
202.6
1.74 TAPPED 9.16 D303X 9.41 D304X
44.7 HOLES 232.7 MOTOR 239.0 MOTOR
44.2 3.51
3.49
89.2
88.6
Product Specifications
• Oilless operation
Model Motor Parallel/ RPM Net Weight
Number Motor HP KW • All wetted aluminum parts treated for
lb kg
Type Staged 60 Hz 50 Hz
71R645-V114-D303X 115-60-1 PSC (4 pole) Parallel 1650 -- 1/3 0.25 15.6 7.09 corrosion protection from moisture
71R655-V10-C222X 220/240-50-1 Shaded Pole Parallel -- 1450 1/3 0.25 16.0 7.27
*71R655-V10-C222TX 220/240-50-1 Shaded Pole Parallel -- 1450 1/3 0.25 16.0 7.27 • Rugged motor shell construction
71R655-V114-D304X 220/240-50-1 PSC (4 pole) Parallel -- 1425 1/3 0.25 16.0 7.27 • Includes
72R547-V116-D303X 115-60-1 PSC (4 pole) Staged 1650 -- 1/3 0.25 15.6 7.09 Dry-cell capacitor AT250 (D303X motor),
72R555-V10-C222X 220/240-50-1 Shaded Pole Staged -- 1450 1/3 0.25 19.8 9.0 AT251 (D304X motor)-not pictured,
72R555-V10-C222TX 220/240-50-1 Shaded Pole Staged -- 1450 1/3 0.25 19.8 9.0
72R555-V116B-D204X 220/240-50-1 PSC (4 pole) Staged -- 1425 1/3 0.25 16.0 7.27 shipped unattached
72R645-V114-D303X 115-60-1 PSC (4 pole) Parallel 1650 -- 1/3 0.25 15.6 7.09 (4) rubber feet AF713A
72R655-V10-C222X 220/240-50-1 Shaded Pole Parallel -- 1450 1/3 0.25 21.8 9.9
72R655-V10-C222TX 220/240-50-1 Shaded Pole Parallel -- 1450 1/3 0.25 21.8 9.9
72R655-V114-D304X 220/240-50-1 PSC (4 pole) Parallel -- 1425 1/3 0.25 16.0 7.27
* All model numbers with T have a terminal box attached
Product Performance m 3 /h CFM
10.0 6.0
5.0
8.0 4.0
FREE AIR FLOW 6.0 3.0 72R645/72R655
71R645/71R655
72R547/72R555
4.0
2.0 2.0
1.0
0 0
0 5 10 15 20 25 30 inHg
1000 800 600 400 200 0 mbar

20 Gast Rocking Piston Compressors and Vacuum Pumps www.gastmfg.com