1. Introducció
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the FORAS JA300 self-priming centrifugal electric pump. Please read this manual thoroughly before installation and use to ensure proper functioning and to prevent damage or injury.
The FORAS JA300 is designed for pumping clean water, even when mixed with air, without solid particles or non-aggressive chemical liquids. It is suitable for domestic water supply, small-scale irrigation, and increasing water pressure in conjunction with pressure tanks.

Figure 1: FORAS JA300 Self-Priming Centrifugal Electric Pump.
2. Informació de seguretat
WARNING: Failure to follow these safety instructions may result in electric shock, fire, serious injury, or death.
- Assegureu-vos que totes les connexions elèctriques les realitzi un electricista qualificat i que compleixin les normatives locals.
- Always disconnect the pump from the power supply before performing any installation, maintenance, or repair work.
- Install the pump in an enclosed space or a location protected from atmospheric influences (rain, direct sunlight, frost).
- Do not operate the pump with flammable or explosive liquids.
- Ensure the pump is properly grounded to prevent electric shock.
- Mantingueu els nens i el personal no autoritzat allunyats de la bomba durant el funcionament.
- The pump is designed for clean water only. Pumping liquids with solid particles or aggressive chemicals can damage the pump and void the warranty.
3. Instal·lació i configuració
3.1 Desembalatge i inspecció
Carefully remove the pump from its packaging. Inspect the pump for any signs of damage that may have occurred during transit. Report any damage to the supplier immediately.
3.2 Ubicació de muntatge
Select a stable, level surface for mounting the pump. The location must be protected from weather elements and have adequate ventilation. Ensure sufficient space around the pump for maintenance and access.
3.3 Connexions de fontaneria
- The suction connection (inlet) is 1.5 inches (32 mm).
- The discharge connection (outlet) is 1 inch (25 mm).
- Use appropriate fittings and sealants to ensure watertight connections. Avoid overtightening.
- Install a foot valve with a strainer on the end of the suction line if drawing water from a well or tank to prevent debris entry and maintain prime.
- For optimal performance, keep suction lift as short as possible.
3.4 Connexió elèctrica
- The pump requires a 230 V AC, 50 Hz power supply.
- Ensure the electrical circuit is protected by an appropriate circuit breaker or fuse.
- Connect the pump to a properly grounded electrical outlet.
- The motor includes integrated thermal protection.

Figura 2: lateral view of the FORAS JA300 pump, showing connections.
4. Instruccions de funcionament
4.1 Cebament de la bomba
As a self-priming pump, the JA300 can handle some air in the suction line. However, for initial startup or after the pump has been drained, it is recommended to fill the pump casing with water through the priming port (usually a plug on top of the pump casing) before starting. This ensures faster priming and protects the mechanical seal.
- Traieu el tap d'amortiment.
- Ompliu la bomba casing completely with clean water.
- Torneu a col·locar el tap d'encès de manera segura.
4.2 Engegada de la bomba
Once primed and all connections are secure, connect the pump to the power supply. The pump will start automatically if connected to a pressure switch system, or manually if controlled by a switch. Allow the pump to run for a few minutes to ensure stable operation and check for leaks.
4.3 Condicions de funcionament
- The pump is designed for continuous operation.
- The maximum water temperature for operation is 50 °C.
- Do not run the pump dry, as this can cause severe damage to the mechanical seal and other components.
5. Manteniment
Regular maintenance ensures the longevity and efficient operation of your FORAS JA300 pump.
- Inspecció periòdica: Periodically check all connections for leaks. Inspect the power cable for any damage.
- Neteja: Keep the pump exterior clean and free from debris. Ensure the motor's cooling fins are not obstructed.
- Hivernització: In areas subject to freezing temperatures, drain the pump completely to prevent damage from ice expansion. Disconnect the power, open drain plugs, and remove priming plugs to allow all water to escape.
- Servei professional: For internal component inspection or repair, it is recommended to contact a qualified service technician.
6. Solució De Problemes
Aquesta secció ofereix solucions a problemes comuns. Per a problemes que no figuren aquí, poseu-vos en contacte amb l'atenció al client.
| Problema | Causa possible | Solució | |
|---|---|---|---|
| La bomba no arrenca. | Sense font d'alimentació. Sobrecàrrega tèrmica activada. Falla del motor. | Comproveu la connexió d'alimentació i l'interruptor. Allow motor to cool down; check for obstructions. Contact qualified technician. | |
| La bomba funciona però no subministra aigua. | Bomba no imprimada. Fuga d'aire a la línia d'aspiració. Suction line blocked. Foot valve stuck or clogged. | Torneu a cebar la bomba. Check all suction connections for tightness. Clear any blockages in the suction line. Inspect and clean foot valve. | |
| Reduced flow or pressure. | Partial blockage. Aire al sistema. Impulsor desgastat. | Check for and clear blockages. Ensure proper priming and no air leaks. Poseu-vos en contacte amb un tècnic qualificat per a la seva inspecció. | |
| La bomba és sorollosa. | Cavitation (running dry or insufficient water). Desgast dels coixinets. Foreign object in pump. | Ensure adequate water supply and proper priming. Contact qualified technician. Disconnect power and inspect pump casing. | |
7. Especificacions tècniques

Figure 3: Rating plate of the FORAS JA300 pump, showing electrical and performance data.
| Dades generals | |
|---|---|
| Model | JA300 |
| Marca | FORAS (PENTAX INDUSTRIES S.p.A.) |
| Tipus | Self-Priming Centrifugal Electric Pump |
| Aplicació | Clean water supply, pressure boosting, irrigation |
| Rang de temperatura del líquid | 0 a 50 °C |
| Dimensions (L x A x A) | 59.6 x 22 x 24 cm |
| Pes | 33 kg |
| Dades de rendiment | |
|---|---|
| Caudal màxim | 140 L/min (8.4 m³/h) |
| Cap Max | 64.5 m |
| Suction Connection (Inlet) | DNA 1.5" (32 mm) |
| Discharge Connection (Outlet) | DNM 1" (25 mm) |
| Dades elèctriques | |
|---|---|
| Voltage | 230 V AC |
| Freqüència | 50 Hz |
| Corrent nominal | 11.8 A |
| Power Absorbed (P1) | 2650 W |
| Power Output (P2) | 2200 W (2.2 kW) |
| Tipus de motor | Asynchronous with integrated thermal protection |
| Classe d'aïllament | F |
| Índex de protecció | IP44 |
| Materials | |
|---|---|
| Cos de la bomba | Cataphoresis Cast Iron / Grey Cast Iron |
| Suport del motor | Ferro colat gris |
| Impulsor | Noryl |
| Eix de transmissió | Acer inoxidable AISI 303 |
| Segell mecànic | Ceramic - Graphite (NBR) |

Figure 4: Performance curve and dimensional drawing for JA series pumps, including JA300.
8. Garantia i Suport
The FORAS JA300 pump is manufactured by PENTAX INDUSTRIES S.p.A. in Italy and comes with a factory guarantee, ensuring European quality and reliability.
For warranty claims, technical assistance, or spare parts inquiries, please contact your authorized dealer or the manufacturer directly. Information regarding spare parts availability is not provided in this manual.
Always provide the model number (JA300) and serial number (found on the rating plate) when contacting support.




