STP-I plunger pump
STP-I 20.50 N
Part number 27171
- 20Flow, l/min
- 500Pressure, bar
- 1450Speed, rpm
- 18.5Power, kW
50 Hz Rated at a motor speed for 50 Hz mains (UK, Europe, Africa, Australia, most of Asia).

Specification
- Flow
- 20 l/min
- Pressure
- 500 bar
- Speed
- 1450 rpm
- Absorbed power
- 18.5 kW
- Weight
- 18.5 kg
Kits
Plungers1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 2872 | Plunger kit, Ø18 mm |
Oil seals1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 2873 | Oil seal kit |
Water seals1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 2874 | Water seal kit, Ø18 mm |
Other kits1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 42120 | Plunger guide kit, Ø18 mm |
Valves1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 43408 | Valve kit |
Exploded view
Parts list
Positions are the balloon numbers on Annovi Reverberi's exploded view. A part with no number of its own comes in the kit shown beside it.
| Pos | Part number | Description | Qty | In kit |
|---|---|---|---|---|
| 1 | 1943040 | Screw TCEI M10x130 | 8 | |
| 2 | 650530 | Washer | 8 | |
| 3 | 1982570 | Washer | 3 | |
| 4 | 1943560 | Screw TCEI M6x12 | 3 | |
| 5 | 880830 | O-ring Ø 15,54x2,62 | 3 | KIT 43408 |
| 6 | 1949055 | Complete valve | 6 | KIT 43408 |
| 7 | 1944010 | Head | 1 | |
| 8 | 180101 | O-ring Ø 17,5x2 | 1 | |
| 9 | 960870 | Plug 1/2" G nickel-plated | 1 | |
| 10 | 1980740 | Plug 3/8" G brass | 2 | |
| 11 | 740290 | O-ring Ø 14x1,78 | 3 | |
| 14 | 1942470 | Piston guide Ø 18 | 3 | KIT 42120 |
| 16 | 1942690 | Water seal | 3 | KIT 2874 |
| 18 | 1340600 | Washer | 3 | |
| 19 | 1941020 | Piston Ø 18 | 3 | KIT 2872 |
| 21 | 1383190 | Plate | 3 | |
| 22 | 1942700 | Gasket | 3 | KIT 2874 |
| 23 | 1940960 | Piston | 3 | |
| 24 | 1940060 | Pin | 3 | |
| 25 | 1941380 | O-ring Ø 66,34x2,62 | 2 | KIT 2873 |
| 26 | 1941390 | Shim 0.05 mm | 1 | |
| 26 | 1941400 | Shim 0.10 mm | 1 | |
| 26 | 1941410 | Shim 0.19 mm | 1 | |
| 26 | 1941420 | Shim 0.25 mm | 1 | |
| 28 | 850370 | Screw TCEI M8x16 | 8 | |
| 29 | 1140410 | Bearing | 2 | |
| 30 | 1940051 | Connecting-rod | 3 | |
| 31 | 1940530 | Shaft | 1 | |
| 31 | 1940970 | Shaft | 1 | |
| 32 | 650250 | Key | 1 | |
| 33 | 1941330 | Pump body | 1 | |
| 34 | 1140370 | Plug | 1 | |
| 35 | 1260250 | Level gauge | 1 | |
| 36 | 1260430 | Ring | 1 | |
| 37 | 1940410 | O-ring Ø 132x3 | 1 | KIT 2873 |
| 38 | 1200430 | Screw TCEI M6x16 | 6 | |
| 39 | 1949010 | Cover | 1 | |
| 40 | 1780690 | Plate | 1 | |
| 41 | 1140450 | O-ring Ø 20,24x2,62 | 1 | |
| 42 | 820680 | Ring | 1 | KIT 2873 |
| 43 | 1940560 | Ring | 3 | KIT 2873 |
| 44 | 1940370 | Foot | 2 | |
| 45 | 1940380 | Screw TCEI 10x18 | 4 | |
| 46 | 200231 | Washer | 4 | |
| 51 | 1949011 | Cover | 1 | |
| 52 | 1941240 | Support | 1 | |
| 53 | 1941640 | Screw TE M6x60 | 3 | |
| 54 | 1941800 | Plug nickel-plated | 3 | |
| 55 | 1941070 | Ring | 3 | |
| 58 | 820490 | O-ring Ø 34,65x1,78 | 3 | KIT 2874 |
| 60 | 1949259 | Head assembly | 1 | |
| 75 | 1941270 | Level gauge | 1 | |
| 76 | 100410 | O-ring Ø 34,6x2,62 | 1 | |
| 77 | 1941260 | Plate | 1 | |
| 78 | 1941290 | Ring | 1 | |
| 79 | 1942480 | Piston guide Ø 18 | 3 | KIT 42120 |
| 80 | 1981180 | Plug 3/8" G nickel-plated | 1 | |
| 81 | 1944020 | Suction fitting | 1 | |
| 82 | 800560 | O-ring Ø 8,73x1,78 | 1 | |
| 83 | 720030 | O-ring Ø 22,22x2,62 | 3 | KIT 43408 |
Motor
A 4-pole motor of at least 18.5 kW drives this pump at 1450 rpm.
| Motor | kW | rpm | Frame | Class | A at 400 V | Suppliers |
|---|---|---|---|---|---|---|
| RN 180Ma4 | 18.5 | 1465 | IEC 180M | IE1 | 37 | |
| RN 160Lb4 uprated | 18.5 | 1420 | IEC 160L | IE1 | 38 |
The contactor and overload relay for each motor are on the motor's page.
Flange
The flange bolts the pump to the face of the motor. It depends on the motor's IEC frame.
- IEC 160, 42 mm shaft (RN 160Lb4) No Annovi Reverberi flange listed for this motor.
- IEC 180, 48 mm shaft (RN 180Ma4) No Annovi Reverberi flange listed for this motor.
Coupling
The flexible coupling joins the motor shaft to the pump shaft inside the flange.
- IEC 160, 42 mm motor shaft No Annovi Reverberi coupling listed: you need one for a 42 mm motor shaft to the pump shaft.
- IEC 180, 48 mm motor shaft No Annovi Reverberi coupling listed: you need one for a 48 mm motor shaft to the pump shaft.