FEATURES l Triplex plunger design provides a smooth liquid flow. l Specially formulated V-Packings and concentric solid ceramic plungers assure true wear surface and extended seal life. l Stacked valve desig n for ease in servicing. l Ultra-compact , hollow-shafted pump for direct mounting to gas engine. l Integral Pressure Unloader with built-in by-pass standard on all units to assure system pressure control and pump pro- tection. l Fixed chemical injector standard on all units offers cleaning flexibility. l Swivel garden hose fitting for easy inlet connection. SPECIFICATIONS U.S. Measure Metric Measure MODEL 3DNX25GSI Flow .............................. ............................. ....................... 2.5 gpm (9.5 lpm) Maximum Discharge Pressure............................. .. 2850 psi (196 bar) Maximum RPM ............................. ............................. 3450 rpm (3450 rpm) Stroke ........................... ............................. ........................... 0.268” (6.8 mm) MODEL 3DNX27GSI Flow .............................. ............................. ....................... 2.7 gpm (10.2 lpm) Maximum Discharge Pressure............................. .. 2850 psi (196 bar) Maximum RPM ............................. ............................. 3450 rpm (3450 rpm) Stroke ........................... ............................. ........................... 0.280” (7.2 mm) COMMON PUMP SPECIFICATIONS Inlet Pressure Range................................ Flooded to 60 psi (Flooded to 4 bar) Bore .............................. ............................. ........................... 0.551” (14 mm) Crankcase Capacity .......................... ............................. . 8.5 oz. (0.25 l) Maximum Liquid Temperature ........................... ....... 140°F (60°C) Above 130°F call CAT PUMPS for inlet conditions and elastomer recommendation s. Inlet Ports (1) ............................ .............................. ..... 3/4” GHF (3/4” GHF) Accessory Port (1) ............................. ....................... 1/4” NPTF (1/4” NPTF) Discharge Port (1).................................. ................... M18 x 1.0 (M18 x 1.0) Chemical Discharge Port (1) ............................ ...3/8” NPTM (3/8” NPTM) Chemical Injection Hose Barb ............................. ........... 1/4” (1/4”) Shaft Diameter (Hollow) .......................... ......................... 3/4” (19.0 mm) Weight .............................. ............................. .................. 10.7 lbs. (4.9 kg) Dimensions .......................... ........................ 8.03 x 7. 83 x 6. 61” (20 4 x 199 x 16 8 mm ) Direct-Drive Plunger Pumps 3DNX25GSI 3DNX27GSI Gas engine must be purchased separately. Models All High Pre ssure Sys tems require a primary pre ssure regul ating devic e (i.e. regula tor, 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. DETERMINING Rated gpm = “Desired” gpm THE PUMP R.P.M. Rated rpm “Desired” rpm DETERMINING gpm x psi = Electric Brake THE REQUIRED H.P. 1460 H. P. Require d DETERMINING Motor Pulley O.D. = Pump Pulley O.D. MOTOR PULLEY SIZE Pump rpm Motor rpm Refer to pump Service Manual for repair procedure and additional technical information. ELECTRIC HORSEPOWER REQUIREMENTS MODELS FLOW PRESSURE RPM psi 1000 psi 1200 psi 1500 psi 2000 psi 2850 U.S. gpm lpm bar 70 bar 85 bar 105 bar 140 bar 196 3DNX25GSI 2.5 9.5 1.7 2.0 2.6 3.4 4.9 3450 3DNX27GSI 2.7 10.2 1.8 2.2 2.8 3.7 5.3 3450
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7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 14
FEATURES
l Triplex plunger design provides a smooth liquid flow
l Specially formulated V-Packings and concentric solid ceramic
plungers assure true wear surface and extended seal life
l
Stacked valve design for ease in servicingl Ultra-compact hollow-shafted pump for direct mounting to
gas engine
l Integral Pressure Unloader with built-in by-pass standard on
all units to assure system pressure control and pump pro-
tection
l Fixed chemical injector standard on all units offers cleaning
flexibility
l Swivel garden hose fitting for easy inlet connection
SPECIFICATIONS US Measure Metric Me
MODEL 3DNX25GSIFlow 25 gpm (95
Maximum Discharge Pressure 2850 psi (19
Maximum RPM 3450 rpm (3450
Stroke 0268rdquo (68
MODEL 3DNX27GSIFlow 27 gpm (102
Maximum Discharge Pressure 2850 psi (19
Maximum RPM 3450 rpm (3450
Stroke 0280rdquo (72
COMMON PUMP SPECIFICATIONS
Inlet Pressure Range Flooded to 60 psi (Flooded to
Bore 0551rdquo (14
Crankcase Capacity 85 oz (
Maximum Liquid Temperature 140degF (
Above 130degF call CAT PUMPS for inlet conditions and elastomer recommendations
Inlet Ports (1) 34rdquo GHF (34rdquo
Accessory Port (1) 14rdquo NPTF (14rdquo
Discharge Port (1) M18 x 10 (M18
Chemical Discharge Port (1) 38rdquo NPTM (38rdquo N
Chemical Injection Hose Barb 14rdquo
Shaft Diameter (Hollow) 34rdquo (190
Weight 107 lbs (4
Dimensions 803 x 783 x 661rdquo (204 x 199 x 168
Direct-DrivePlunger Pumps
3DNX25GS
3DNX27GS
Gas engine must be purchased separately
Models
All High Pressure Systems require a primary pressure regulating device (ie regula tor
unloader) and a secondary pressure relief device (ie 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 customerrsquos 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 servicemanual and with each Accessory Data sheet CAUTIONS and WARNINGS can also be
viewed online at wwwcatpumpscomcautions-warnings or can be requested directly
from CAT PUMPS
DETERMINING Rated gpm = ldquoDesiredrdquo gp
THE PUMP RPM Rated rpm ldquoDesiredrdquo rp
DETERMINING gpm x psi = Electric Bra
THE REQUIRED HP 1460 H P Require
DETERMINING Motor Pulley OD = Pump Pulley
MOTOR PULLEY SIZE Pump rpm Motor rpm
Refer to pump Service Manual for repair procedure and additional technical inform
ELECTRIC HORSEPOWER REQUIREMENTMODELS FLOW PRESSURE
psi
1000
psi
1200
psi
1500
psi
2000
psi
2850
US
gpm lpm
bar
70
bar
85
bar
105
bar
140
bar
196
3DNX25GSI 25 95 17 20 26 34 49
3DNX27GSI 27 102 18 22 28 37 53
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 24
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 34
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 44
Models 3DNX25GSI 3DNX27GSI
1 Special concentric high-density polishedsolid ceramic plungers provide a true wearsurface and extended seal life
2 High tensile strength forged brass manifoldhead with built-in integral unloader and eightmounting screws for exceptional strength
3 100 wet seal design adds to service lifeby allowing pumped liquids to cool andlubricate on both sides
4 Stacked Valve assemblies include stainlesssteel valves seats and springs to providecorrosion-resistance ultimate seating andextended life
5 Unique design and specially formulatedV-Packings offer unmatched performanceand seal life
4
4
1
2
35
CAT PUMPS
1681 983085 94TH LANE NE MINNEAPOLIS MN 554499830854324PHONE 983080763983081 7809830855440 mdash FAX 983080763983081 7809830852958e-mail techsupportcatpumpscomwwwcatpumpscom
For International Inquiries go to wwwcatpumpscom and navigate to the ldquoContact Usrdquo link PN 993286 Rev C 411 41102
OUT
783 (199)
528 (134)
38 - 18NPTF
Inlet
5 2
8 (
1 3 4 )
9 0
ordm
R
4 5
5 4 3 (
oslash 1 3 8
) R 5 2 5 5
8 7 ( oslash 1 4
9 )
4 5 ordm
452 (115)
38rdquo - NPTMDischarge
803 (204)
14rdquo - 18NPTF
6 6
1 (
1 6 8 )
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 24
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 34
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 44
Models 3DNX25GSI 3DNX27GSI
1 Special concentric high-density polishedsolid ceramic plungers provide a true wearsurface and extended seal life
2 High tensile strength forged brass manifoldhead with built-in integral unloader and eightmounting screws for exceptional strength
3 100 wet seal design adds to service lifeby allowing pumped liquids to cool andlubricate on both sides
4 Stacked Valve assemblies include stainlesssteel valves seats and springs to providecorrosion-resistance ultimate seating andextended life
5 Unique design and specially formulatedV-Packings offer unmatched performanceand seal life
4
4
1
2
35
CAT PUMPS
1681 983085 94TH LANE NE MINNEAPOLIS MN 554499830854324PHONE 983080763983081 7809830855440 mdash FAX 983080763983081 7809830852958e-mail techsupportcatpumpscomwwwcatpumpscom
For International Inquiries go to wwwcatpumpscom and navigate to the ldquoContact Usrdquo link PN 993286 Rev C 411 41102
OUT
783 (199)
528 (134)
38 - 18NPTF
Inlet
5 2
8 (
1 3 4 )
9 0
ordm
R
4 5
5 4 3 (
oslash 1 3 8
) R 5 2 5 5
8 7 ( oslash 1 4
9 )
4 5 ordm
452 (115)
38rdquo - NPTMDischarge
803 (204)
14rdquo - 18NPTF
6 6
1 (
1 6 8 )
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 34
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 44
Models 3DNX25GSI 3DNX27GSI
1 Special concentric high-density polishedsolid ceramic plungers provide a true wearsurface and extended seal life
2 High tensile strength forged brass manifoldhead with built-in integral unloader and eightmounting screws for exceptional strength
3 100 wet seal design adds to service lifeby allowing pumped liquids to cool andlubricate on both sides
4 Stacked Valve assemblies include stainlesssteel valves seats and springs to providecorrosion-resistance ultimate seating andextended life
5 Unique design and specially formulatedV-Packings offer unmatched performanceand seal life
4
4
1
2
35
CAT PUMPS
1681 983085 94TH LANE NE MINNEAPOLIS MN 554499830854324PHONE 983080763983081 7809830855440 mdash FAX 983080763983081 7809830852958e-mail techsupportcatpumpscomwwwcatpumpscom
For International Inquiries go to wwwcatpumpscom and navigate to the ldquoContact Usrdquo link PN 993286 Rev C 411 41102
OUT
783 (199)
528 (134)
38 - 18NPTF
Inlet
5 2
8 (
1 3 4 )
9 0
ordm
R
4 5
5 4 3 (
oslash 1 3 8
) R 5 2 5 5
8 7 ( oslash 1 4
9 )
4 5 ordm
452 (115)
38rdquo - NPTMDischarge
803 (204)
14rdquo - 18NPTF
6 6
1 (
1 6 8 )
7222019 Cat Pumps 3DNX25GSI Service
httpslidepdfcomreaderfullcat-pumps-3dnx25gsi-service 44
Models 3DNX25GSI 3DNX27GSI
1 Special concentric high-density polishedsolid ceramic plungers provide a true wearsurface and extended seal life
2 High tensile strength forged brass manifoldhead with built-in integral unloader and eightmounting screws for exceptional strength
3 100 wet seal design adds to service lifeby allowing pumped liquids to cool andlubricate on both sides
4 Stacked Valve assemblies include stainlesssteel valves seats and springs to providecorrosion-resistance ultimate seating andextended life
5 Unique design and specially formulatedV-Packings offer unmatched performanceand seal life
4
4
1
2
35
CAT PUMPS
1681 983085 94TH LANE NE MINNEAPOLIS MN 554499830854324PHONE 983080763983081 7809830855440 mdash FAX 983080763983081 7809830852958e-mail techsupportcatpumpscomwwwcatpumpscom
For International Inquiries go to wwwcatpumpscom and navigate to the ldquoContact Usrdquo link PN 993286 Rev C 411 41102
OUT
783 (199)
528 (134)
38 - 18NPTF
Inlet
5 2
8 (
1 3 4 )
9 0
ordm
R
4 5
5 4 3 (
oslash 1 3 8
) R 5 2 5 5
8 7 ( oslash 1 4
9 )
4 5 ordm
452 (115)
38rdquo - NPTMDischarge
803 (204)
14rdquo - 18NPTF
6 6
1 (
1 6 8 )
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