Do you need a dry-priming pump that can handle heavy solids without clogging? The Gorman-Rupp PAV Series pumps are designed for demanding applications in construction, industry, and municipal settings. Thanks to their vortex design, they provide an unobstructed flow path, minimizing clogging and reducing wear. Priming is fast and consistent via a compressor/venturi system or a high-capacity diaphragm priming pump. An optional TPAWS system is available for even faster results in challenging conditions.
With above-ground access, these pumps are easy to inspect and maintain on-site. The PAV series is built for long-term use, handles large solids, can run dry without damage, and resists wear in harsh environments.
The PAV-6400VA is a priming-assisted centrifugal pump with a vortex impeller design, based on the Gorman-Rupp 6400 Series platform. The vortex design uses a recessed impeller that creates a swirling vortex inside the pump casing to draw fluids and suspended solids into the volute. This reduces direct contact between the impeller and the pumped material, which minimises wear and reduces the risk of clogging. The priming-assisted system enables the pump to evacuate air from the suction line and prime from dry conditions.
In a conventional centrifugal pump, the impeller makes direct contact with the liquid and any solids being pumped. In the vortex design, the impeller is recessed away from the flow path. It creates a powerful swirling vortex within the pump casing that draws fluids and suspended solids into the volute without the impeller directly contacting the pumped material. This results in an unobstructed flow path that minimises clogging, reduces impeller wear when handling abrasive or solids-laden liquids, and extends service intervals.
The 6400 Series vortex models deliver flows up to 495 m³/h (137 l/s), heads up to 42 m, and can pass solids up to 4″ (102 mm). Specific performance depends on the impeller type selected and the operating conditions. Contact Gorman-Rupp Europe for detailed performance curves and sizing assistance based on your application requirements.
The PAV-6400VA uses a diaphragm pump priming system to evacuate air from the pump casing and suction line to create a vacuum. For applications requiring faster and more reliable priming under harsh conditions, the optional TPAWS (Twin Port Air/Water Separation) system is available.
Two vortex impeller types are available, each suited to different applications. The straight-vane impeller is designed for more aggressive, abrasive liquids where maximum wear resistance is required. The winged-vane impeller is suited for applications requiring higher discharge pressures. The impeller selection depends on the medium being pumped, solids content, and required hydraulic performance. Consult Gorman-Rupp Europe for selection advice.
Yes. The PAV-6400VA is designed with dry-run capability. An oversized, oil-lubricated mechanical seal allows the pump to operate without liquid in the casing without sustaining damage. This is particularly relevant for applications with intermittent flow, such as sewage bypass, stormwater handling, HDD-bentonite applications and construction site dewatering where the pump may periodically run dry between pumping cycles.
The vortex design and priming-assisted capability make the PAV-6400VA suitable for applications involving solids-laden, abrasive, or stringy liquids where clogging resistance and reduced wear are important. Typical applications include sewage bypass operations, municipal wastewater handling, HDD-bentonite applications, construction site dewatering, industrial process water, and stormwater management. The unobstructed flow path is particularly effective for handling rags, debris, and other materials that cause blockages in conventional pump designs.
TPAWS stands for Twin Port Air Water Separator, a proprietary system invented and designed by Gorman-Rupp. A priming-assisted system relies on a valve system, allowing air to be removed from the suction line and at the same time preventing fluids from entering the priming pump. The TPAWS effectively seals the vacuum port once the pump is fully primed, and opens when a reprime is needed. Thanks to the large secondary port, the priming time is reduced by up to 30%. As an added benefit, contamination on the valve seats is virtually impossible. Should any contamination hinder the effective reprime, a quick rinse with fresh water through the built-in flush port gets you going again. TPAWS is the most reliable air-water separating system on the market.
The 6400 Series is built on the proven components and technology of the Gorman-Rupp Super T Series. Standard construction includes a ductile iron pump casing and an impeller made from a Gorman-Rupp proprietary Hard Iron 400 Brinell alloy. The pump features a heavy-duty shaft and oil-lubricated mechanical seal designed for abrasive and solids-handling service. For specific material recommendations based on your application and medium, contact Gorman-Rupp Europe.
The 6400 Series comes standard with a five-year warranty. Gorman-Rupp Europe provides application engineering support for pump selection, system sizing, and configuration advice from its European facilities in Waardenburg (Netherlands) and Namur (Belgium). Product support includes operation and maintenance manuals, specification data sheets, performance curves, and outline drawings. Parts and service are available through a network of factory-trained distributors across Europe.
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