High Pressure Piston Pump · Frame size 4 PFR 333

Name: 333
Brand: CAT PUMPS
SKU: 333

This triplex (three piston rods) positive displacement, reciprocating piston pump is constructed with chrome-plated brass manifolds, 304 stainless steel valve assemblies, and chrome-plated 304 stainless steel sleeves and cylinders. Multiple piston cup and seal configurations are available with NBR (Buna-N) O-rings.

The lower RPM belt drive design provides strong inlet suction and long-lasting pump and seal life.

Request this pump Data sheet (PDF) Spare parts

Technical specifications

Flow rate	15 l/min
Operating pressure	85 bar
Speed	1,070 min⁻¹
Inlet port	1" NPT
Discharge port	3/8" / 1/2" NPT
Shaft diameter	16.5 mm
Material	Brass

Downloads

CAD files

STEP – 333 (catpumps.com)

333: drive, frame size and accessories

Drive: At its rated point – 15 l/min at 85 bar – the 333 needs about 2.7 kW of drive power by the rule of thumb pressure × flow / 480; the next standard motor size above is 3 kW. More under Sizing and drive.
Frame size: Frame size 4 PFR comprises 4 models covering 15–19 l/min and 70–85 bar. For more flow see the 430 (19 l/min at 70 bar); none reaches a higher pressure.
Material: The 333 belongs to the brass group. The same ratings (flow, pressure, speed) are also available in other materials: 331 (stainless steel).
Accessories: Our catalogue has 17 pressure regulators, 29 unloader valves, 33 pressure relief valves and 17 pulsation dampeners that suit 15 l/min and 85 bar. The lists are filtered to this operating point.

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.

3 kits bundle wearing parts of this pump ↓

Skip the drawing, go to the parts list

Parts list

Item	Part no.	Description	Qty
5	125824	Screw, HHC Sems (M6x16) 8/4STCP	8
8	27950	Cover, BearingAL	2
10	26536	O-Ring, Bearing Cover - 70DNBR	2
11	24159	Seal, Oil, CrankshaftNBR	2
15	14487	Bearing, BallSTL	2
20	48734	Rod, Connecting, AssemblyTNM	3
25	43163	Crankshaft, Dual End, Tapped (M8 x 1.25)FCM	1
32	43211	Cap, Oil FillerABS	1
33	14177	O-Ring, Oil Filler Cap - 70DNBR	1
37	92241	Gauge, Oil, Bubble with Gasket - 80D 1 - 2PC	1
38	44428	Gasket, Flat, Oil Gauge - 80DNBR	1
40	126541	Screw, HHC Sems (M6 x 20)STCP	4
48	25625	Plug, Drain (1/4" x 19 BSP[M])STCP	1
49	23170	O-Ring, Drain Plug - 70DNBR	1
50	48772	Cover, Rear [07/08]AL	1
51	48773	O-Ring, Rear Cover [07/08]NBR	1
53	76953	Crankcase with Guide PinsAL	1
55	126546	Stud (M8x41.4)STCP	2
56	27712	Pan, Oil (Use with Blue Dot Seals and Wick)POP	1
64	16948	Pin, CrossheadCM	3
65	27981	Rod, Piston, SteppedSZZ	3
69	126259	Washer, Oil SealSTCP	3
70	25301	Seal, Oil - 80DNBR	3
71	126189	Washer, Oil SealSTCP	3
75	25327	Slinger, BarrierS	3
77	25392	O-Ring, Sleeve 6/3NBR	6
80	25299	SleeveSCP	3
100	27710	Retainer, SealPVDF	3
101	27711	Wick, Long Tab (Use with Blue Dot Seals and Oil Pan)	3
106	30315	Seal, Low-Pressure, (Greased)NBR	3
109	22177	Plug HH (1/4" NPT)BBCP	1
110	25128	Manifold, Inlet (Models 333, 430)BBCP	1
118	22160	Elbow, Street [1/2" NPT(M)]BBCP	3
119	27004	Valve, InletS	3
119	28339	Valve, InletS	3
130	22021	PistonS	3
133	28955	Cup, Piston (Machined Cup - Models 331, 333)NBR	3
133	43172	Cup, Piston (Machined Cup - Models 331, 333)FPM	3
135	27983	Spacer, PistonS	3
136	27002	Retainer, PistonS	3
137	27006	Washer, Conical (M6)S	3
138	27000	Nut, Slotted (M6)S	3
139	14158	Cotterpin (M1.6 x 10)S	3
143	23172	O-Ring, Cylinder - 70DNBR	6
150	24285	CylinderSCP	3
150	25660	CylinderSCP	3
153	21985	Backup Ring, SeatPTFE	3
164	43434	Seat, Q.V.S	3
166	43723	Valve, Q.V.S	3
167	43360	Spring, Q.V.S	3
168	43442	Retainer, Spring, Q.V.S	3
185	24459	Manifold, Discharge (Models 333, 430)BBCP	1
186	126232	Lockwasher (M8)STCP	2
187	126564	Bolt, Cylinder (M8)STCP	2
188	126591	Washer, Shim (M8 x 2 x 13) 2 - 4STCP	2-4
189	126813	Washer, Shim (M8 x 1 x 13) 2 - 4STCP	2-4
190	126576	Washer, Shim (M8 x .5 x 13) 2 - 4STCP	2-4
191	126590	Washer, Shim (M8 x .3 x 13) 2 - 4STZP	2-4
192	26676	Retainer, Shim (M8)S	2
194	126201	Nut, Hex Flange (M8)STCP	2
196	22187	Plug, Discharge (3/8" NPT[M]) (Not Shown)BBCP	1
–	6124	Gasket, Liquid (3 oz. / 0,1 l)	1
–	6139	Lubricant, Anti-Seize (8 oz) (Model 1531)	1
–	6340	Pump, Pulse (Not Shown)	1
–	6400	Manifold, Pulse Pump (Models 335, 435)BB	1
–	25130	Protector, Shaft	1
–	25634	Manifold, Discharge (Models 331, 431)SS	1
–	25635	Manifold, Inlet (Models 331, 431)SS	1
–	28460	Sleeve (Unchromed) (323)S	3
–	29044	Cylinder (Unchromed)S	3
–	30047	Key (M5 x 5 x 24)	1
–	30243	Mount, Direct (Belt-Drive Only)	1
–	30305	Kit, Seal - Standard NBR	1
–	34334	Kit, Oil Drain (3/8" x 24") (Not Shown) 1	1
–	126610	Mounting, Angle Rail (STZP R)	1
–	828710	Protector, Oil Cap with Foam Gasket 1	1
–	6132	Oil, Crankcase, Bottle 1l	1

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.

Valve kits

Valve kit

30024

NBRMedium Nitrile (Buna-N)

contains 5 items · one kit per pump
Parts list
- 143 23172 O-Ring, Zylinder 6×
- 164 29487 Ventilsitz 3×
- 166 22842 Ventil 3×
- 167 22031 Feder, Ventil 3×
- 168 22841 Federhalter, Ventil (2 Stk. für 30103) 3×
Valve kit

30103

NBR (PULSE)Medium Nitrile (Buna-N)

contains 5 items · one kit per pump
Parts list
- 143 23172 O-Ring, Zylinder 6×
- 164 29487 Ventilsitz 3×
- 166 22842 Ventil 3×
- 167 22031 Feder, Ventil 3×
- 168 22841 Federhalter, Ventil (2 Stk. für 30103) 3×
Valve kit

30686

NBRMedium Nitrile (Buna-N)

contains 5 items · one kit per pump
Parts list
- 143 23172 O-Ring, Zylinder 6×
- 164 43434 Ventilsitz 3×
- 166 43723 Ventil 3×
- 167 43360 Feder, Ventil 3×
- 168 43442 Federhalter, Ventil (2 Stk. für 30103) 3×