PUMP FEATURES
• Triplex plunger design provides a smooth liquid flow.
• Specially formulated Hi-Pressure Seals and concentric solid
ceramic plungers assure true wear surface and extended seal
life.
• Ultra-compact, hollow-shafted pump for direct mounting to
gas engine.
• Integral Regulating Unloader with built-in by-pass standard on
all units to assure system pressure control and pump protec-
tion.
• Fixed chemical injector standard on all units offers cleaning
flexibility.
• Stacked valve design for ease in servicing.
• Swivel garden hose fitting with filter screen for easy inlet
connection.
COMMON PUMP SPECIFICATIONS
Inlet Pressure Range .......................Flooded to 60 PSI (Flooded to 4 Bar)
Bore ................................................................... 0.630” (16 mm)
Max. Liquid Temperature ................................... 140°F (60°C)
Above 130°F call CAT PUMPS for inlet conditions and elastomer recommendations.
Crankcase Capacity .......................................... 8.5 oz. (0.25 L)
Inlet Port (1) ...................................................3/4” GHF (3/4” GHF)
Discharge Port (1) ...........................................M18x1.0 (M18x1.0)
Chemical Discharge Port (1) ......................3/8” NPTM (3/8” NPTM)
Chemical Injection Barb ..............................8/32” UNF (8/32” UNF)
Shaft Diameter ...................................................... 3/4” (19.0 mm)
Weight ............................................................ 10.7 lbs. (4.9 kg)
Dimensions ......................................7.99 x 7.75 x 6.29” (203 x 197 x 160 mm)
SPECIFICATIONS U.S. Measure Metric Measure
MODEL 3DX25GSI
Flow ........................................................... 2.5 GPM (9.5 L/M)
Max. Discharge Pressure ..........................2500 PSI (175 BAR)
Max. RPM ................................................3450 RPM (3450 RPM)
Stroke ............................................................ 0.204” (5.2 mm)
MODEL 3DX27GSI
Flow ........................................................... 2.7 GPM (10.2 L/M)
Max. Discharge Pressure ..........................2500 PSI (175 BAR)
Max. RPM ................................................3450 RPM (3450 RPM)
Stroke ............................................................ 0.220” (5.6 mm)
MODEL 3DX29GSI
Flow ........................................................... 2.9 GPM (10.9 L/M)
Max. Discharge Pressure ..........................2500 PSI (175 BAR)
Max. RPM ................................................3450 RPM (3450 RPM)
Stroke ............................................................ 0.232” (5.9 mm)
MODEL 3DX30GSI
Flow ........................................................... 3.0 GPM (11.4 L/M)
Max. Discharge Pressure ..........................2500 PSI (175 BAR)
Max. RPM ................................................3450 RPM (3450 RPM)
Stroke ............................................................ 0.244” (6.2 mm)
“Customer confidence is our greatest asset”
DETERMINING Rated G.P.M. = “Desired” G.P.M.
THE PUMP R.P.M.
Rated R.P.M. “Desired” R.P.M.
DETERMINING
GPM x PSI = Electric Brake
THE REQUIRED H.P. 1460 H. P. Required
DETERMINING Motor Pulley O.D. = Pump Pulley O.D.
MOTOR PULLEY SIZE
Pump R.P.M. Motor R.P.M.
Note: Consult engine manufacturer when using gas or diesel engine.
Refer to pump Service Manual for repair procedure and additional technical information.
Direct-Drive
Plunger Pump
Models
3DX25GSI Non-Production
3DX27GSI Non-Production
3DX29GSI See Current Data Sheet
3DX30GSI See Current Data Sheet
ELECTRIC HORSEPOWER REQUIREMENTS
MODEL FLOW PRESSURE RPM
PSI PSI PSI PSI PSI
1000 1200 1500 2000 2500
U.S. BAR BAR BAR BAR BAR
GPM L/M 70 85 105 140 175
3DX25GSI 2.5 9.5 1.7 2.0 2.6 3.4 4.3 3450
3DX27GSI 2.7 10.2 1.8 2.2 2.8 3.7 4.6 3450
3DX29GSI 2.9 10.9 1.9 2.4 3.0 4.0 5.0 3450
3DX30GSI 3.0 11.4 2.1 2.5 3.1 4.1 5.2 3450
Gas engine must be purchased separately.
All High Pressure Systems require a primary pressure regulating device (i.e. regulator, unloader)
and a secondary pressure relief device (i.e. pop-off valve, relief valve). Failure to install such relief
devices could result in personal injury or damage to pump or property. CAT PUMPS does not
assume any liability or responsibility for the operation of a customer’s high pressure system.
Read all CAUTIONS and WARNINGS before commencing service or operation of any high
pressure system. The CAUTIONS and WARNINGS are included in each service manual and with
each Accessory Data sheet. CAUTIONS and WARNINGS can also be viewed online at
www.catpumps.com/cautions-warnings or can be requested directly from CAT PUMPS.
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