CH plunger pump
CHC 20/50 S
Part number 291300
- 20Flow, l/min
- 500Pressure, bar
- 1450Speed, rpm
- 19.1Power, 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
- 19.1 kW
- Shaft
- Solid, Ø24 mm
Kits
Low pressure seals1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 147 | Low pressure seal kit |
Plungers1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 151 | Plunger kit |
Valves1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 152 | Valve kit |
High pressure seals1
| Part number | Description | Per pump | Suppliers |
|---|---|---|---|
| KIT 153 | High pressure seal kit |
Exploded view
Parts list
The parts that come in this pump's service kits, by Udor part number.
Motor
A 4-pole motor of at least 19.1 kW drives this pump at 1450 rpm.
| Motor | kW | rpm | Frame | Class | A at 400 V | Suppliers |
|---|---|---|---|---|---|---|
| RN 180La4 | 22 | 1465 | IEC 180L | IE1 | 42 | |
| RN 160Lc4 uprated | 22 | 1450 | IEC 160L | IE1 | 42 |
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 160Lc4) No Udor flange listed for this motor.
- IEC 180, 48 mm shaft (RN 180La4) C15
Coupling
The flexible coupling joins the motor shaft to the pump shaft inside the flange.
- IEC 160, 42 mm motor shaft No Udor coupling listed: you need one for a 42 mm motor shaft to 24 mm pump shaft.
- IEC 180, 48 mm motor shaft No Udor coupling listed: you need one for a 48 mm motor shaft to 24 mm pump shaft.