High Pressure Plunger Pump · Frame size 4SP
4SP21EL
This triplex (three plunger rods) positive displacement, reciprocating plunger pump is constructed with a brass manifold, 304 stainless steel valve assemblies, solid ceramic plungers and standard NBR (Buna-N) seals and O-rings. This pump model does not include a pressure control device, opening possibilities for multiple plumbing configurations.
Technical specifications
| Flow rate | 7.9 l/min |
|---|---|
| Operating pressure | 138 bar |
| Speed | 1,750 min⁻¹ |
| Inlet port | 3/8" NPT(F) |
| Discharge port | 3/8" NPT(F) |
| Shaft diameter | 5/8" (hollow shaft) |
| 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.
On the request list: 0 · for this pump: 0Open request list →
2 kits bundle wearing parts of this pump ↓
Parts list
| Item | Part no. | Description | Qty | Add to request list |
|---|---|---|---|---|
| 5 | 549360 | Screw, HH (M6 x 14)STCP | 3 | |
| 8 | 547153 | Cover, BearingAL | 1 | |
| 10 | 14041 | O-Ring, Bearing Cover - 70DNBR | 1 | |
| 11 | 55337 | Seal, Oil, CrankshaftNBR | 1 | |
| 15 | 14488 | Bearing, Ball, InnerSTL | 1 | |
| 20 | 547020 | Assembly Rod, ConnectingTNM | 3 | |
| 25 | 132605 | Crankshaft, 5/8", (8.1 mm) (Models 4SP21ELR, ELU)CM | 1 | |
| 26 | 12385 | Ring, Retaining, BearingSTL | 1 | |
| 27 | 15710 | Bearing, Ball, OuterSTL | 1 | |
| 32 | 549726 | Cap, Vented with O-Ring (Rain Cap) | 1 | |
| 33 | 14179 | 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 | |
| 48 | 44842 | Plug, DrainNY | 1 | |
| 49 | 14179 | O-Ring, Oil Filler Cap - 70DNBR | 1 | |
| 53 | 547099 | CrankcaseAL | 1 | |
| 64 | 16948 | Pin, CrossheadCM | 3 | |
| 65 | 49982 | Rod, PlungerBB | 3 | |
| 69 | 126259 | Washer, Oil SealSTCP | 3 | |
| 70 | 25301 | Seal, Oil - 80DNBR | 3 | |
| 88 | 132607 | WasherS | 3 | |
| 90 | 132606 | Plunger (M16 x 24.6) (Models 4SP21ELR, ELU)CC | 3 | |
| 98 | 46730 | Washer, Seal - 90DNBR | 3 | |
| 99 | 542405 | Retainer, Plunger (M6 x 35)S | 3 | |
| 100 | 44869 | Retainer, SealPVDF | 3 | |
| 106 | 48222 | Seal, Low-Pressure with S-SpringNBR | 3 | |
| 120 | 132608 | Case, Seal (Models 4SP21ELR, ELU)BB | 3 | |
| 121 | 13977 | O-Ring, Seal Case - 70D (Models 4SP21ELR, ELU)NBR | 3 | |
| 125 | 547157 | Seal, High-Pressure (Models 4SP21ELR, ELU)SNG | 3 | |
| 160 | 17428 | O-Ring, Inlet Seat - 80DNBR | 3 | |
| 161 | 547077 | Seat, InletS | 3 | |
| 162 | 48361 | Backup Ring, SeatD | 3 | |
| 163 | 670085 | O-Ring, Discharge Seat - 90DNBR | 3 | |
| 164 | 547076 | Seat, DischargeS | 3 | |
| 166 | 547098 | ValveS | 6 | |
| 167 | 134579 | SpringS | 6 | |
| 168 | 543988 | Retainer, Spring, InletPVDF | 3 | |
| 169 | 49764 | Retainer, Spring, DischargePVDF | 3 | |
| 172 | 142807 | O-Ring, Valve Plug - 90DNBR | 3 | |
| 174 | 547104 | Plug, Valve (M20 x 1.5) with O-RingBB | 3 | |
| 185 | 132609 | Head, ManifoldFBB | 1 | |
| 188 | 549357 | Screw, HSH (M6 x 60)STCP | 8 | |
| 197 | 941516 | Assembly, Garden Hose (3 /8" NPT[M] x 3/4" GH[F])BB | 1 | |
| 255 | 30516 | Assembly, Bolt MountSTZP | 1 | |
| – | 6132 | Oil, Crankcase, Bottle 1l | 1 |
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
76968
NBRMedium Nitrile (Buna-N)
contains 4 items · one kit per pump
Parts list
- 9846730Washer, Seal - 90D3×
- 10648222Seal, Low-Pressure with S-Spring3×
- 12113977O-Ring, Seal Case - 70D (Models 4SP21ELR, ELU)3×
- 125547157Seal, High-Pressure (Models 4SP21ELR, ELU)3×
Valve kits
Valve kit
76976
NBRMedium Nitrile (Buna-N)
contains 10 items · one kit per pump
Parts list
- 16017428O-Ring, Inlet Seat - 80D3×
- 161547077Seat, Inlet3×
- 16248361Backup Ring, Seat3×
- 163670085O-Ring, Discharge Seat - 90D3×
- 164547076Seat, Discharge3×
- 166547098Valve6×
- 167134579Spring6×
- 168543988Retainer, Spring, Inlet3×
- 16949764Retainer, Spring, Discharge3×
- 172142807O-Ring, Valve Plug - 90D3×
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- Operating pressure
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- Speed
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- Material
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