Models
311211L 3
Models
NXT Air-Powered Pumps
Your model number is marked on the pump identification plate located toward the rear of the air motor. To determine
the model number of your pump from the following matrix, select the six digits which describe your pump. The first
digit is always J for circulation pumps. The remaining five digits define the construction. For example, a circulation
pump with carbon steel construction, a 2.0:1 ratio, low noise exhaust, no communication option, npt fittings, and
chrome rod and cylinder is model number JC20L1. To order replacement parts, see page 18.
Viscount I Plus Hydraulic-Powered Pumps
*BSPP models require inlet and outlet seals to perform optimally. See Accessories, page 9.
J C20 L1
First
Digit
Second Digit Third and Fourth Digit Fifth Digit Sixth Digit
Material
Motor
Size
Lower
Size
Maximum
Fluid
Pressure
psi (MPa, bar) Exhaust
Communi-
cation Fittings
Rod and
Cylinder
J
(all
circulation
pumps)
C Carbon Steel 20 2200 2000 200 (1.4, 14.0) L Low Noise none 1 npt Chromex/
Chrome
S Stainless Steel 30 2200 1500 300 (2.1, 21.0) M Low Noise
DataTrak
™
2 npt Chromex/
MaxLife
35 3400 2000 340 (2.3, 23.0) R Remote none 3 bspp* Chromex/
Chrome
40 2200 1000 400 (2.8, 28.0) S Remote
DataTrak
™
4 bspp* Chromex/
MaxLife
45 3400 1500 460 (3.2, 32.0)
5 tri-
clamp
Chromex/
Chrome
6 tri-
clamp
Chromex/
MaxLife
XX = X.X:1 ratio 7 npt Chromex/
Nitride
Model No. Series
Maximum Pump
Working Pressure
psi (MPa, bar)
Connection
Style Material
Rod
Material
Cylinder
Material
High-Flo Lower
(see manual 311690)
253642 A 300 (2.1, 21) npt sst Chromex Chrome 253033
253643 A 225 (1.6, 16) npt sst Chromex Chrome 253034
253644 A 300 (2.1, 21) npt sst Chromex MaxLife 253568
253645 A 225 (1.6, 16) npt sst Chromex MaxLife 253569
253646 A 300 (2.1, 21) npt cst Chromex Nitride 253061
253647 A 225 (1.6, 16) npt cst Chromex Nitride 253062
253648 A 300 (2.1, 21) bspp* sst Chromex Chrome 253423
253649 A 225 (1.6, 16) bspp* sst Chromex Chrome 253085
253650 A 300 (2.1, 21) bspp* sst Chromex MaxLife 253398
253651 A 225 (1.6, 16) bspp* sst Chromex MaxLife 253397
253652 A 300 (2.1, 21) tri-clamp sst Chromex Chrome 253520
253653 A 225 (1.6, 16) tri-clamp sst Chromex Chrome 253521
253654 A 300 (2.1, 21) tri-clamp sst Chromex MaxLife 253523
253655 A 225 (1.6, 16) tri-clamp sst Chromex MaxLife 253524
