Lenntech
info@lenntech.com
www.lenntech.com
Tel. +31-15-261.09.00
Fax. +31-15-261.62.89
8 Frame Block-Style
Stainless Steel
Plunger Pump
Standard Brass
Model
Flushed
Model
781
781K
Model 781 Shown
(Mounting rails sold seperately)
FEATURES
●
Triplex design delivers high efficiency and low pulsation.
●
Durable V-Packings are lubricated and cooled by the liquid being
pumped.
●
Pre-set Lo-Pressure Seals provide secondary protection against
external leaks and require no packing adjustment.
●
Special high-density, polished, concentric plungers provide a true
wear surface and extended seal life.
●
Optimal FPM and EPDM elastomers for compatibility with many
liquids and temperatures up to 200º F.
SPECIFICATIONS
U.S. Measure
Metric Measure
Flow ......................................................................4.5 gpm
(17 lpm)
Pressure Range .
.............100 to 5000 psi
(7 to 345 bar)
Inlet Pressure Range* .
.........Flooded to 40 psi (Flooded to 2.8 bar)
RPM. ..............1700 rpm
(1700 rpm)
Bore ...............................................................0.551 "
(14 mm)
Stroke .............................................................0.945"
(24 mm)
Crankcase Capacity....................................25 oz.
(0.75 l)
Maximum Liquid Temperature .
......................160°F
Flushing
Ports (2)* ..............................1/8"(71°C)
NPTF
(1/8" NPTF)
Above 130ºFPorts
call Cat(2)
Pumps
for inlet conditions
and elastomer recommendations.
Discharge
.............................1/2"
NPTF
(1/2" NPTF)
Inlet Ports
(2) ........................................1/2"
NPTF
(1/2"
Shaft
Diameter
- Single End.................. 0.945"
(24NPTF)
mm)
Weight . ..................................................... 48.1 lbs.
(21.8 kg)
Dimensions . ..................13.15 x 9.25 x 6.06"
(334 x 235 x 154 mm)
*Flushed K Models: Special ported inlet manifold permits an external flush liquid providing
cooling for hi-temp liquids and low lubricity liquids.
ELECTRIC HORSEPOWER REQUIREMENTS
FLOW
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.
PRESSURE
MOTOR PULLEY SIZE
psi
3000
psi
3500
psi
4000
psi
5000
Using 1725 rpm Motor
10" O.D. Pump Pulley
Pulley
rpm
O.D.
U.S.
gpm
lpm
bar
210
bar
245
bar
275
bar
345
4.5
17
9.3
10.8
12.3
15.4
1700
9.5
4.0
15
8.2
9.6
11.0
13.7
1511
8.5
DETERMINING
THE PUMP R.P.M.
Rated gpm
Rated rpm
=
“Desired” gpm
“Desired” rpm
DETERMINING
THE REQUIRED H.P.
gpm x psi
1460
=
Electric Brake
H. P. Required
Motor Pulley O.D.
Pump rpm
=
Pump Pulley O.D.
Motor rpm
DETERMINING
MOTOR PULLEY SIZE
See complete Drive Packages [Inclds: Pulleys, Belts, Hubs, Key] Tech Bulletin 003.
Refer to pump Service Manual for repair procedure and additional technical information.
PARTS LIST
ITEM
2
5
8
9
10
11
15
20
25
30
31
32
33
37
38
40
48
49
50
51
53
54
64
65
69
70
75
88
89
90
95
96
97
◆
98
99
100
104
◆
105
106
◆
110
112
◆
117
122
123
◆
124
126
127
128
139
162
163
◆
164
166
167
168
185
188
255
260
265
274
283
299
781
MATL
PART NUMBER
781K
MATL
30067
92538
43466
815280
12393
43222
43221
48863
119234
46554
44967
828710
44666
14177
92241
44428
92538
25625
23170
127701
14047
127698
27488
43237
48913
126589
43228
43328
45697
43505
45890
89653
43235
17399
14160
46204
44041
49665
995686
701734
701912
703297
701587
48821
701790
49466
49205
—
701595
701913
703298
87952
701598
701596
701914
703318
701589
701682
45895
701911
701683
45156
701599
701597
701915
703180
701591
701751
44056
44565
49214
87952
30243
30645
30611
30660
33000
34334
811483
—
STL
S
AL
FBR
NBR
NBR
STL
TNM
FCM
FCM
AL
PE
RTP
NBR
—
NBR
S
STCP
NBR
AL
NBR
AL
S
CM
SHS
STCP R
NBR
S
S
BB
CC
SS
PTFE
NBR
FPM
EPDM
SS
SS
PVDF
NBR
FPM
EPDM
SS
NBR
SFTA*
EPDM
SS
—
NBR
FPM
EPDM
S
PTFE
NBR
FPM
EPDM
SS
SS
SNG
SFTA*
SS
SS
PTFE
NBR
FPM
EPDM
SS
SS
SS
PVDF
SS
S
STZP
STZP R
STZP R
—
STL
—
SS
—
30067
92538
43466
815280
12393
43222
43221
48863
119234
46554
44967
828710
44666
14177
92241
44428
92538
25625
23170
127701
14047
127698
27488
43237
48913
126589
43228
43328
45697
43505
45890
89653
43235
17399
14160
46204
44041
49665
995686
701734
701912
703297
701587
48821
701790
49466
—
49241
701595
701913
703298
87952
701598
701596
701914
703318
701589
701682
45895
701911
701683
45156
701599
701597
701915
703180
701591
701751
44056
44565
49214
87952
30243
30645
30611
30660
33000
34334
—
811485
STL
S
AL
FBR
NBR
NBR
STL
TNM
FCM
FCM
AL
PE
RTP
NBR
—
NBR
S
STCP
NBR
AL
NBR
AL
S
CM
SHS
STCP R
NBR
S
S
BB
CC
SS
PTFE
NBR
FPM
EPDM
SS
SS
PVDF
NBR
FPM
EPDM
SS
NBR
SFTA*
EPDM
—
SS
NBR
FPM
EPDM
S
PTFE
NBR
FPM
EPDM
SS
SS
SNG
SFTA*
SS
SS
PTFE
NBR
FPM
EPDM
SS
SS
SS
PVDF
SS
S
STZP
STZP R
STZP R
—
STL
—
—
SS
◆
◆
◆
◆
◆
◆
DESCRIPTION
Key (M8x7.5x25)
Screw, HHC, Sems (M6x16)
Cover, Bearing
Split Shim, 2 Pc.
O-Ring, Bearing Cover
Seal, Oil, Crankshaft
Bearing, Roller
Rod Assy, Connecting [6/02]
Crankshaft - Single End (60mm Extension)
Crankshaft - Single End (34mm Extension) Gearbox Only
Cover, Blind Bearing
Protector, Oil Cap w/Foam Gasket
Cap, Oil Filler, Domed
O-Ring, Filler Cap - 70D
Gauge, Oil, Bubble w/Gasket - 80D
Gasket, Flat Flex., Oil Gauge - 80D
Screw, HHC, Sems (M6x16) (See Tech Bulletin 106)
Plug, Drain (1/4"x19BSP)
O-Ring, Drain Plug - 70D
Cover, Rear [03/10]
O-Ring, Rear Cover - 70D (See Tech Bulletin 106)
Crankcase w/Guide Pins [03/10]
Pin, Guide
Pin, Crosshead
Rod, Plunger, Short [05/02]
Washer, Oil Seal
Seal, Oil, Crankcase
Slinger, Barrier
Washer, Keyhole (M18)
Spacer, Plunger
Plunger (M14x72)
Stud, Plunger Retainer (M6x58)
Back-up-Ring, Plunger Retainer
O-Ring, Plunger Retainer - 80D
O-Ring, Plunger Retainer - 80D
O-Ring, Plunger Retainer - 70D
Gasket, Plunger Retainer
Retainer, Plunger (M6)
Retainer, Seal (See Tech Bulletin 105)
O-Ring, Inlet Adapter - 70D
O-Ring, Inlet Adapter - 75D
O-Ring, Inlet Adapter - 70D
Adapter, Inlet
Seal, LPS w/SS-Spg
Seal, LPS w/SS-Spg
Seal, LPS w/SS-Spg
Manifold, Inlet/Discharge, Block-Style (1/8" Flushed Port)
Manifold, Inlet/Discharge, Block-Style Flushed
O-Ring, V.P. Spacer - 70D
O-Ring, V.P. Spacer - 75D
O-Ring, V.P. Spacer - 70D
Screw, HSH (M10x55)
Back-Up Ring, V.P. Cylinder
O-Ring, V.P. Cylinder - 70D
O-Ring, V.P. Cylinder - 75D
O-Ring, V.P. Cylinder
Cylinder V.P.
Adapter, Female
V-Packing
V-Packing
Adapter, Male
Plug, Inlet/Discharge Manifold (1/2" NPT)
Back-up-Ring, Valve Seat
O-Ring, Seat - 70D
O-Ring, Seat - 75D
O-Ring, Seat
Seat
Valve
Spring
Retainer, Spring
Manifold, Valve, Block-Style
Scew, HSH, (M10x55)
Kit, Direct Mount
Assy, Angle Rail A
Assy, Angle Rail B
Kit, Complete Mounting
Hub, (M24) H Series (See Tech Bulletin 003)
Kit, Oil Drain (3/8"x24")
Head, Complete, Block-Style
Head, Complete, Block-Style, Flushed
QTY
1
8
1
1/2
2
1
2
3
1
1
1
1
1
1
1
1
4
1
1
1
1
1
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
1
1
3
3
3
4
3
3
3
3
3
3
9
9
3
1
12
12
12
12
6
6
6
6
1
14
1
1
1
1
1
1
1
1
EXPLODED VIEW
Model
781, 781K
February 2013
ITEM
300
310
350
352
370
781
MATL
701883
701920
◆ 76883
701884
701921
◆ 76884
30696
44050
—
6107
NBR
FPM*
EPDM
NBR
FPM
EPDM
STZP
STZP
—
—
6119
—
PART NUMBER
781K
701883
701920
◆ 76883
701884
701921
◆ 768884
30696
44050
990663
6107
6119
DESCRIPTION
QTY
MATL
NBR
FPM*
EPDM
NBR
FPM
EPDM
STZP
STZP
—
—
—
Kit, Seal (Inclds: 96,97,104,106,112,122,123,127)
Kit, Seal (Inclds: 96,97,104,106,112,122,123,127) (781.0110, 781K.0110)
Kit, Seal (Inclds: 96,97,104,106,112,122,123,127) (781.0220, 781K.0220)
Kit, Valve (Inclds: 162,163,164,166,167,168)
Kit, Valve (Inclds: 162,163,164,166,167,168) (781.0110, 781K.0110)
Kit, Valve (Inclds: 162,163,164,166,167,168) (781.0220, 781K.0220)
Plier, Reverse
Tool, Oil Gauge Removal
Assembly, Flushing, 5 Gal, 1 GPM, 3 PSI
Oil, Bottle (21 oz.) ISO 68 Hydraulic
(Fill to specified crankcase capacity prior to start-up)
Lubricant, Antiseize (1 oz.)
1
1
1
2
2
2
1
1
1
1-2
1
Bold print numbers are unique to a particular pump model. Italics are optional items. ◆ Silicone oil/grease required.
[ ] Date of latest production change. R Components comply with RoHS Directive. *Review materail codes for individual items (SFTA generally may be used as alternate).
See Tech Bulletins 002, 003, 024, 035, 036, 043, 053, 054, 061, 064, 067, 074, 077, 083, 105 and 106 for additional information.
See 8051-8078 Gearbox data sheet for optional gearbox drive.
MATERIAL CODES (Not Part of Part Number): AL=Aluminum CC=Ceramic CM=Chrome-Moly
EPDM=Ethylene Propylene Diene Monomer FBR=Fiber FCM=Forged Chrome-Moly FPM=Fluorocarbon NBR=Medium Nitrile (Buna-N)
PE=Polyethylene PTFE=Pure Polytetrafluoroethylene PVDF=Polyvinylidene Fluoride RTP=Reinforced Composite S=304SS SFTA=Special Blend PTFE Tan
SHS=304SS/High Strength SS=316SS STCP=Steel/Chrome Plated STL=Steel STZP=Steel/Zinc Plated TNM=Special High Strength
13.15 (334)
9.68 (246)
6.91 (176)
6.42 (163)
6.34 (161)
6.06 (154)
2.83
(72)
3.15
(80)
8MM
2.36
(60)
3.15 (80)
0.43 (11)
'A' RAIL
0.36 (9)
'B' RAIL
1.69
(43)
24MM
1.81
(46)
2.80
(71)
9.25 (235)
5.87 (149)
(2) 3/8" NPT DISCHARGE PORT
(2) 1/8" NPT FLUSHING PORT
(.K MOLDEL ONLY)
3.78 (96)
4.33 (110)
4.92 (125)
3.90 (99)
4.92 (125)
(2) 1/2" NPT INLET PORT
5.88 (144) 'A' RAIL
5.12 (130) 'B' RAIL
M8 X 1.25
THREADED HOLE (4)
0.79 (20) DEEP
Model 781, 781K
2
2
4
5
3
1
4
1
2
Special concentric, high density, polished,
solid ceramic plungers provide a true wear
surface and extended seal life.
Manifolds are 316 SS block-style for long
term, continuous duty and corrosion
resistance.
3
4
Standard Models: Lo-Pressure Seals and
V-Packings are completly lubricated and
cooled by the liquid being pumped.
316 SS valves and seats provide corrosionresistance, ultimate seating and extended life.
Lenntech
5
6
Specially formulated, Cat Pump exclusive,
V-Packings offer unmatched performance
and seal life.
Optional special ported Flushed Inlet
Manifold permits external flush for lubricating and cooling seals when pumping
liquids such as DI water, Hi-Temp or low
lubricity. (Not Shown)
www.lenntech.com
Tel.
.09.00
PN 993124 Rev D 2/13 13069