PA 3511F / PA3511F Fluid-o-Tech 125 GPH 2.08 GPM Standard Bypass Stainless Steel Rotary Vane Pump PA0351HHCDN0000
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⚙️ Fluid-o-Tech PA 3511F High-Flow Brass Rotary Vane Pump with Bypass Valve
The Fluid-o-Tech PA 3511F is a powerful brass rotary vane pump belonging to the high-capacity Rotoflow® line. This pump is engineered for large commercial and industrial systems requiring smooth, pulse-free fluid delivery up to 900 LPH (238 GPH) at moderate to high pressures.
The PA prefix confirms that this model includes a built-in, adjustable bypass/relief valve, which is essential for safely controlling the maximum discharge pressure and protecting the system and motor. The Flange Mount ('F') design ensures a stable, robust connection directly to a compatible motor shaft. Constructed with a durable brass housing, stainless steel rotor, and carbon graphite internals, the PA 3511F is widely used in high-volume reverse osmosis boost systems, large carbonators, chillers, and chemical metering systems involving non-aggressive liquids.
Technical Specifications Summary
| SPECIFICATION |
DETAILS |
NOTES |
| Model Number |
PA 3511F |
'PA' indicates built-in bypass valve; 'F' indicates Flange Mount. |
| Manufacturer |
Fluid-o-Tech |
High-capacity model in the PO/PA 300-3500 series. |
| Pump Type |
Rotary Vane (Positive Displacement) |
Delivers smooth, pulse-free fluid transfer. |
| Housing Material |
Brass |
Durable construction for water and mild fluids. |
| Internal Materials |
Stainless Steel Rotor, Carbon Graphite Vanes |
Designed for long service life. |
| Bypass Valve |
Built-in and Adjustable |
Allows system pressure control without external components. |
| Port Size |
3/4" NPT or GAS Thread |
Larger ports for high flow requirements. |
| Nominal Flow (60 Hz / 1725 RPM) |
238 GPH (900 LPH) |
High-volume flow rate. |
| Max Differential Pressure |
16 bar (230 PSI) |
Maximum continuous differential pressure rating. |
| Max Static Pressure |
20 bar (290 PSI) |
Maximum static pressure limit. |
| Max Operating Temp |
70∘C (158∘F) |
Maximum fluid temperature limit. |
| Part # |
Bypass |
Mount |
Body |
1450 RPM |
|
|
|
1725 RPM |
|
|
|
Req. HP @ 200 PSI |
| |
|
|
|
100 PSI |
|
200 PSI |
|
100 PSI |
|
200 PSI |
|
|
| |
|
|
|
GPH |
LPH |
GPH |
LPH |
GPH |
LPH |
GPH |
LPH |
|
| PA 3511F |
Yes |
Flange |
Stainless steel |
103 |
390 |
98 |
371 |
123 |
466 |
117 |
443 |
1/2 |
The PO 70-400 series positive displacement rotary vane pumps are available with brass or stainless steel housings with 3/8” GAS or NPT ports and internal relief valve. The nominal flow rates range between 70 and 400 l/h at 1450 rpm. Any vane pump of this series may be operated at 1725 rpm as well and will provide about 20% more capacity, with a maximum of 530 l/h. Maximum discharge pressure is 16 bar (230 psi). This series mounts directly to NEMA 48Y motors by means of a v-band clamp and to M71, M80 IEC and NEMA 56C motors by means of an adapter and relevant coupling.
