Z8 / ZR8

The catalogue identifies AISI 304 hydraulic construction for Z8 and duplex stainless for ZR8. Check the component material table against the water analysis.

These figures describe separate limits of the range. Check that the required flow and total head lie on the curve of a specific model.

Z8 and ZR8 are multistage hydraulic families for high-flow borehole duties. Selection between Z8 and duplex ZR8 depends on water chemistry, the outside diameter including cable guards and the stage count needed at the duty point. Check the actual clear bore rather than relying on the nominal well size. Example applications: Water supply from deep wells to a network or reservoir; Agricultural irrigation networks.

50 Hz catalogue maximum flow: 180 m³/h. Verify against the complete model code, frequency and operating conditions. Family limits may occur on different variants or at different duty points; they must not be assumed to apply simultaneously.

50 Hz catalogue maximum head: 525 m. Verify against the complete model code, frequency and operating conditions. Family limits may occur on different variants or at different duty points; they must not be assumed to apply simultaneously.

Maximum pump outside diameter: 198 mm including both cable guards. Verify against the complete model code, frequency and operating conditions.

Stainless Z8 or duplex ZR8 hydraulic construction. Integrated spring-loaded non-return valve. Stage-specific operating curves. Assess these features with flow, head, fluid and installation conditions.

Establish dynamic water level, well yield and sand content. Select motor cooling, cable sizing and electrical protection as part of the complete system.

No. Selection requires dynamic water level, well yield, delivery elevation and pressure, pipe losses and sand content. Installation depth is not total dynamic head. Motor cooling and minimum submergence require separate checks.

The Technical Documents section lists 2 document links. PDFs open on the Parla site. Check model, language, 50/60 Hz and revision; document types may vary by product.

Share minimum, normal and maximum flow, total head, liquid and temperature, power supply, suction and installation conditions. For replacements add the nameplate, connection dimensions and measured operating values.