High Pressure Plunger Pump · Frame size 68 PFR 6821

Name: 6821
Brand: CAT PUMPS
SKU: 6821

This triplex (three plunger rods) positive displacement, reciprocating plunger pump is constructed with 316 stainless steel block-style manifolds, 316 stainless steel valve assemblies, solid ceramic plungers and standard NBR (Buna-N) seals and O-rings.

Request this pump Data sheet (PDF) Spare parts

Technical specifications

Flow rate	95 l/min
Operating pressure	210 bar
Speed	615 min⁻¹
Inlet port	1 1/2" NPT
Discharge port	1" NPT
Shaft diameter	45 mm
Material	Stainless Steel

Downloads

CAD files

Spare parts

Click an item in the drawing or in the parts list to add it to your request list. We turn it into a quotation – no order is placed.

8 kits bundle wearing parts of this pump ↓

Skip the drawing, go to the parts list

Parts list

Item	Part no.	Description	Qty
5	89728	Screw, HH (M10 x 40)S	8
6	15847	Lockwasher (M10)S	8
7	19934	Washer, Flat (M10)S	8
8	29443	Cover, Bearing, OuterALE	2
10	29444	O-Ring, Bearing Cover - 70DNBR	2
11	11443	Seal, Oil, Crankshaft - 70DNBR	2
12	126594	Washer, Shim (M120 x 0.3) 0 - 2STCP	0-2
13	126595	Washer, Shim (M120 x 0.5) 0 - 2STCP	0-2
15	29441	Bearing, RollerSTL	2
16	29442	Cover, Bearing, InnerSTL	2
17	29444	O-Ring, Bearing Cover - 70DNBR	2
20	126612	Assembly, Connecting Rod (Includes: 21, 22)BBHS	3
21	126560	Washer, LockingSTCP	3
22	126593	Washer, Flat (M10.5)STCP	6
25	29440	Crankshaft, Dual End (M65.5)FCM	1
32	43211	Cap, Oil FillerABS	1
33	14177	O-Ring, Oil Filler Cap - 70DNBR	1
34	126743	Bolt, Eye (M12x1.75) (For Lifting Pump Only)STCP	1
38	129343	Gasket, Flat FlexibleRBR	1
39	27769	Dip Stick (Blue)ABS	1
40	89627	Screw, HH (M10 x 30)S	8
41	15847	Lockwasher (M10)S	8
42	19934	Washer, Flat (M10)S	8
48	25625	Plug, Drain (1/4" x 19 BSP[M])STCP	1
49	23170	O-Ring, Drain Plug - 70DNBR	1
50	29438	Cover, RearALE	1
51	129386	Gasket, Rear CoverNBR	1
53	133667	Crankcase Assembly (Includes: 54)ALE	1
54	43282	Pin, GuideS	2
64	29481	Pin, CrossheadCM	3
65	48735	Rod, PlungerSSZZ	3
69	126588	Washer, Oil SealSTCP	3
70	29454	Seal, Oil, Crankcase - 80DNBR	3
75	43865	Slinger, BarrierS	3
88	45676	Washer, Keyhole (M16)S	3
90	43957	Plunger (M32x145)CC	3
95	89778	Stud, Plunger Retainer (M10x135)SS	3
96	20189	Back-up-Ring, Plunger RetainerPTFE	3
97	11345	O-Ring, Plunger Retainer - 70DNBR	3
98	44085	Gasket, Plunger Retainer (M7) Model 3501, 3501C, Gasket, Plunger Retainer (M10) Model 3511, 3511CSS	3
99	44084	Retainer, Plunger (M10)SS	3
100	703084	Retainer, SealD	3
104	43875	O-Ring, Inlet Adapter - 70DNBR	3
105	45562	Adapter, Inlet, Low-PressureSS	3
106	44098	Seal, Low-Pressure, with SS - SpringNBR	3
107	44101	Washer, Low-Pressure SealSS	3
110	701321	Manifold Inlet, Block-StyleSS	1
111	701116	Plug, Inlet [1-1/2" NPT(M)]SS	1
112	701632	O-Ring, Spacer, InletNBR	6
113	701329	Backup Ring, Spacer, InletPTFE	6
114	701327	Spacer, InletSS	3
117	89694	Screw, HSH (M16 x 110), UpperS	8
118	701077	Plug, [1/4" NPT(M)]SS	3
123	12391	O-Ring, V-Packing Cylinder - 70DNBR	3
124	701330	Cylinder, V-PackingSS	3
126	45564	Adapter, FemaleSS	3
127	44608	V-PackingSTG	6
128	704477	Adapter, MaleSS	3
155	48861	O-Ring, V-Packing Spacer, Inner - 90DNBR	3
156	48371	Backup Ring, V-Packing, Spacer, InnerD	3
157	45674	Spacer, V-PackingSS	3
158	48362	Backup Ring, V-Packing, Spacer, OuterD	3
159	48860	O-Ring, V-Packing Cylinder - 90DNBR	3
160	44756	Pin, Guide IMDMS	2
162	21985	Backup Ring, SeatPTFE	6
163	26089	O-Ring, Seat - 80DNBR	6
164	44080	SeatSS	6
166	44081	ValveSS	6
167	44082	SpringSS	6
168	44735	Retainer, SpringPVDF	6
170	44794	Washer, Spring RetainerSS	6
171	44793	Spring, Coil, Valve PlugSS	6
172	15853	O-Ring, Valve Plug - 70DNBR	6
173	20224	Back-up-Ring, Valve PlugPTFE	6
174	701260	Plug, ValveSS	6
175	87951	Screw, HSH (M10x30)S	36
185	701320	Manifold, Discharge, Block-StyleSS	1
188	701279	Screw, HSH (M12 x 100), LowerS	4
193	89694	Screw, HSH (M16 x 110), UpperS	8
250	29445	Protector, Shaft (Included w/pump)ALE	1
255	33243	Mount, DirectSTZP	1
256	29649	Washer, Slant (M16) (Ensures Proper Alignment Between the Rail and Mounting Screw)STCP	4
259	126604	Rail, Box (Included with Pump)STCP	2
–	6124	Gasket, Liquid (3 oz. / 0,1 l)	1
–	6139	Lubricant, Anti-Seize (8 oz) (Model 1531)	1
–	34314	Kit, Oil Drain (3/8" x 48") (Not Shown)	1
–	43048	Key (M14 x 9 x 90) 1	1
–	88902	Stud (M16 x 277) For Removal of DM and IM) (Not Shown) 2	1
–	701322	Manifold Inlet, Block-Style, Flushed (Models 6801K, 6811K)SS	1
–	819010	Assembly, Crankcase, Cast Iron Conversion (Not Shown) 1	1
–	828710	Protector, Oil Cap with Foam Gasket 1	1
–	910001	Pumpenkopf, komplett, Block-Style	1
–	910002	Pumpenkopf, komplett, Block-Style	1
–	990663	Assembly, Flushing, 5 Gal, 115V, 1.1 Amp, 1/2" NPT (Model 6821K) 1	1
–	6138	Oil, Crankcase, Can 5l	2

in the request list covered by a requested kit

Seal and valve kits

A kit bundles the wearing parts of one assembly. Selecting it highlights the items it covers in the drawing and the parts list – once requested, they stay marked.

Seal kits

Seal kit

701649

NBR (STD)Medium Nitrile (Buna-N)

contains 11 items · one kit per pump
Parts list
- 97 11345 O-Ring, Plungerhalter 3×
- 104 43875 O-Ring, Adapter, Einlass 3×
- 106 44098 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 701632 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 123 12391 O-Ring, V-Packung Zylinder 3×
- 127 44608 V-Packung 6×
- 155 48861 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 48371 Stützring, Distanzstück, innen 3×
- 158 48362 Stützring, Distanzstück, außen 3×
- 159 48860 O-Ring, Distanzstück, V-Packung, außen 3×
Seal kit

33720

FPM (0.0110)Fluorocarbon

contains 11 items · one kit per pump
Parts list
- 97 11375 O-Ring, Plungerhalter 3×
- 104 44826 O-Ring, Adapter, Einlass 3×
- 106 44827 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 701328 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 123 13266 O-Ring, V-Packung Zylinder 3×
- 127 44608 V-Packung 6×
- 155 11748 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 48371 Stützring, Distanzstück, innen 3×
- 158 48362 Stützring, Distanzstück, außen 3×
- 159 20137 O-Ring, Distanzstück, V-Packung, außen 3×
Seal kit

702352

EPDM (0.0220)Ethylene Propylene Diene Monomer

contains 11 items · one kit per pump
Parts list
- 97 701490 O-Ring, Plungerhalter 3×
- 104 701656 O-Ring, Adapter, Einlass 3×
- 106 48244 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 701973 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 123 701657 O-Ring, V-Packung Zylinder 3×
- 127 44608 V-Packung 6×
- 155 701749 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 48371 Stützring, Distanzstück, innen 3×
- 158 48362 Stützring, Distanzstück, außen 3×
- 159 701492 O-Ring, Distanzstück, V-Packung, außen 3×
Seal kit

76864

IPFE (0.0770)I-Perfluoroelastomer

contains 11 items · one kit per pump
Parts list
- 97 702961 O-Ring, Plungerhalter 3×
- 104 702977 O-Ring, Adapter, Einlass 3×
- 106 76298 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 703291 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 123 703481 O-Ring, V-Packung Zylinder 3×
- 127 44608 V-Packung 6×
- 155 703486 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 28242 Stützring, Distanzstück, innen 3×
- 158 20464 Stützring, Distanzstück, außen 3×
- 159 703159 O-Ring, Distanzstück, V-Packung, außen 3×

Valve kits

Valve kit

34151

NBR (STD)Medium Nitrile (Buna-N)

contains 10 items · 2 kits per pump
Parts list
- 162 21985 Stützring, Ventilsitz 3×
- 163 26089 O-Ring, Ventilsitz 3×
- 164 44080 Ventilsitz 3×
- 166 44081 Ventil 3×
- 167 44082 Feder, Ventil 3×
- 168 44735 Federhalter, Ventil 3×
- 170 44794 Scheibe, Federhalter 3×
- 172 15853 O-Ring, Ventilstopfen 3×
- 172 89827 O-Ring, Ventilstopfen 3×
- 173 20224 Stützring, Ventilstopfen 3×
Valve kit

701798

FPM (0.0110)Fluorocarbon

contains 10 items · 2 kits per pump
Parts list
- 162 21985 Stützring, Ventilsitz 3×
- 163 11377 O-Ring, Ventilsitz 3×
- 164 44080 Ventilsitz 3×
- 166 44081 Ventil 3×
- 167 44082 Feder, Ventil 3×
- 168 44735 Federhalter, Ventil 3×
- 170 44794 Scheibe, Federhalter 3×
- 172 11720 O-Ring, Ventilstopfen 3×
- 172 11747 O-Ring, Ventilstopfen 3×
- 173 20224 Stützring, Ventilstopfen 3×
Valve kit

701799

EPDM (0.0220)Ethylene Propylene Diene Monomer

contains 9 items · 2 kits per pump
Parts list
- 162 21985 Stützring, Ventilsitz 3×
- 163 46647 O-Ring, Ventilsitz 3×
- 164 44080 Ventilsitz 3×
- 166 44081 Ventil 3×
- 167 44082 Feder, Ventil 3×
- 168 44735 Federhalter, Ventil 3×
- 170 44794 Scheibe, Federhalter 3×
- 172 701481 O-Ring, Ventilstopfen 3×
- 173 20224 Stützring, Ventilstopfen 3×
Valve kit

76171

IPFE (0.0770)I-Perfluoroelastomer

contains 9 items · 2 kits per pump
Parts list
- 162 21985 Stützring, Ventilsitz 3×
- 163 703244 O-Ring, Ventilsitz 3×
- 164 44080 Ventilsitz 3×
- 166 44081 Ventil 3×
- 167 44082 Feder, Ventil 3×
- 168 44735 Federhalter, Ventil 3×
- 170 44794 Scheibe, Federhalter 3×
- 172 702974 O-Ring, Ventilstopfen 3×
- 173 20224 Stützring, Ventilstopfen 3×