CAT PUMPS
CAT PUMPS

High Pressure Plunger Pump · Frame size 35 PFR

3550

This triplex (three plunger rods) positive displacement, reciprocating plunger pump is constructed with a chrome-plated brass block-style manifold, 304 stainless steel valve assemblies, solid ceramic plungers and standard NBR (Buna-N) seals and O-rings.

Technical specifications

Flow rate 38 l/min
Operating pressure 414 bar
Speed 940 min⁻¹
Inlet port 3/4"
Discharge port 1/2"
Shaft diameter 35 mm
Material Brass

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.

2 kits bundle wearing parts of this pump ↓

Skip the drawing, go to the parts list

Exploded view

Exploded view 3550

Parts list

ItemPart no.DescriptionQtyAdd to request list
230742Passfeder, M10 x 8 x 70STL1
5125753Screw, HHC, Sems (M8 x 25) (Model 2530E)S8
844542Deckel, LagerAL2
9815279Shim, Split, 2-Piece 0 - 2FBR2
1012398O-Ring, Bearing Cover - 70DNBR2
1113296Seal, Oil, Crankshaft 0 - 2NBR2
1529326Bearing, RollerSTL2
20121467Rod, Connecting Assembly (Includes: 21, 22, 23) (Model 3521C)TNM3
21126749Washer, Locking (M10)STCP3
22126593Washer, Flat (M10.5)STCP6
23122045Screw, HH (M10x55)STZP6
2529325Crankshaft, Dual End (M48)FCM1
31828710Protector, Oil Cap with Foam Gasket 1PE1
3243211Cap, Oil FillerABS1
3314177O-Ring, Oil Filler Cap - 70DNBR1
34126743Bolt, Eye (M12x1.75) (For Lifting Pump Only)STCP1
3792241Gauge, Oil, Bubble with Gasket - 80D 1 - 22
3844428Gasket, Flat, Oil Gauge - 80DNBR2
40125753Screw, HHC, Sems (M8 x 25) (Model 2530E)S8
4825625Plug, Drain (1/4" x 19 BSP[M])STCP1
4923170O-Ring, Drain Plug - 70DNBR1
5045936Cover, Rear (See Tech Bulltin 118)AL1
5116612O-Ring, Cover - 70DNBR1
5349755Kurbelgehäuse (Enthält: 34, 54)AL1
5427488Pin, GuideS2
5627790Pan, OilPOP1
5992538Screw, HHC, Sems (M6 x 16) (Model 2530E)S2
6443864Pin, CrossheadCM3
6549076Rod, PlungerSSHB3
69126587Washer, Oil SealSTCP3
70100488Seal, Oil, CrankcaseNBRS3
75110669Slinger, BarrierS3
86132952AdapterD3
88110670Washer, Keyhole (M16)S3
90132953Plunger (M20x110)CC3
95126549Stud, Plunger Retainer (M7x103)STCP3
96132954Back-up-Ring, Plunger RetainerPTFB3
9714190O-Ring, Plunger Retainer - 70DNBR3
9844069Gasket, Plunger Retainer (M7) Model 3501, 3501C, Gasket, Plunger Retainer (M10) Model 3511, 3511CSS3
9944068Retainer, Plunger (M7) [7/02]SS3
10044119Retainer, Seal, RearPPG3
10144095Wick, Long Tab3
10643513Seal, LPS w/SS-SpgNBR3
110132956Manifold, SealBBCP1
11211373O-Ring, Inlet Manifold - 70DNBR4
11744585Screw, HSH (M14x40)S4
11848702Plug [1/4" NPT(M)]S2
126132958Adapter, FemalePTFB3
12743516V-PackingSNG9
12843517Adapter, MaleBB3
136132964Retainer, Valve AssyBB3
15514200O-Ring, Seal Case - 70DNBR6
156132960Back-up-Ring, Valve SpacerPTFE6
157132959Spacer, ValveBB3
16248510Back-up-Ring, Valve SeatPTFE6
16311338O-Ring, Valve Seat - 70DNBR6
164132965Seat, ValveS6
16648793ValveSS6
16743751Spring, ValveS6
16844564Retainer, SpringPVDF6
17214179O-Ring, Oil Filler Cap - 70DNBR3
17349850Backup Ring, Valve PlugPTFB3
174132966Plug, ValveBB3
17789921Screw, HSH (M12 x 30)S8
178132967Cover, ValveBB1
185132962Manifold, Inlet/Discharge, Block-StyleBBCP1
18619935Washer (M12)SCP16
188128035Screw, HSH (M12 x 110)S8
25044516Wellenschutzkappe m/2 Schrauben, Federringen und Scheiben (bei Pumpe)NY1
25534018Mount, Direct (STZP R)STZP1
260126611Mount, Rail Assembly (STZP R)STZP1
27880540Screw, Adjusting (M12 x 100) 2ZP1
27930278Oiler (1 oz) (Not Shown) 3STZP3
28334314Kit, Oil Drain (3/8" x 48") (Not Shown)1
2906124Gasket, Liquid (3 oz. / 0,1 l)1
299818608Head, CompleteBBCP1
–6133Oil, Crankcase, Can 4l1

in the request listcovered 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

    76982

    NBRMedium Nitrile (Buna-N)

    contains 7 items · one kit per pump

    Parts list
    • 9714190O-Ring, Plungerhalter - 70D3×
    • 10643513Dichtung, Niederdruck m/SS-Feder3×
    • 11211373O-Ring, Saugstutzen4×
    • 126132958Adapter, weiblich3×
    • 12743516V-Packung9×
    • 15514200O-Ring, Distanzstück - 70D6×
    • 156132960Stützring, Distanzstück6×

Valve kits

  • Valve kit

    77033

    NBRMedium Nitrile (Buna-N)

    contains 8 items · 2 kits per pump

    Parts list
    • 16248510Stützring, Ventilsitz3×
    • 16311338O-Ring, Ventilsitz - 70D3×
    • 164132965Ventilsitz3×
    • 16648793Ventil3×
    • 16743751Feder3×
    • 16844564Federhalter, Ventil3×
    • 17214179O-Ring, Ventilstopfen - 70D3×
    • 17349850Stützring, Ventilstopfen3×

More models in frame size 35 PFR

High Pressure Plunger Pump 3501

3501

Flow rate
37.9 l/min
Operating pressure
345 bar
Speed
915 min⁻¹
Material
Stainless Steel
High Pressure Plunger Pump 3507

3507

Flow rate
33 l/min
Operating pressure
345 bar
Speed
800 min⁻¹
Material
Nickel-Aluminum-Bronze
High Pressure Plunger Pump 3507HS

3507HS

Flow rate
38 l/min
Operating pressure
345 bar
Speed
915 min⁻¹
Material
Nickel-Aluminum-Bronze
High Pressure Plunger Pump 3511

3511

Flow rate
53 l/min
Operating pressure
210 bar
Speed
800 min⁻¹
Material
Stainless Steel

View all plunger pumps →

High Pressure Plunger Pump 3550
3550 · High Pressure Plunger Pump