GGG50 Semi-Open Pump Impellers

02A CLEARER CASTING PURCHASE

Vane bodies and shaft interfaces from one production source

Relia Casting supplies GGG50 semi-open impellers and related pump parts with shell-mould casting and CNC finishing. Our factory has its own sand-casting and machining production, with coated-sand/shell moulding as its main route. This combination suits OEM teams keeping the hydraulic design while buying a finished rotor interface.

PDF, IGS or STP data can define the vane form, hub and shaft connection. Sandblasting, spray painting, powder coating or a custom treatment can be selected by region. Dimensional and material reports, together with real workshop/equipment photographs, are available to support your component and source assessment.

04A CLEARER CASTING PURCHASE

The cast vane and machined hub need a shared axis

The central bore defines how the impeller runs on the shaft; the vane envelope needs the correct relationship to that axis. Mark the locating face, bore and relevant runout or orientation requirement on the drawing. Otherwise a good bore measurement can coexist with a vane form running eccentrically.

Retain enough machining stock on the hub to reach the finished size without cutting into an unacceptable section. The casting-to-machining plan should preserve the hydraulic geometry while producing the shaft connection that your assembly actually uses.

Running datum

Central bore axis

Cast form

Vane envelope and hub relationship

06A CLEARER CASTING PURCHASE

Balancing specified after the final rotating condition

Balancing addresses mass distribution around the running axis; dimensional runout addresses geometry. Both may matter, but they answer different questions. Where rigid-rotor balancing applies, ISO 21940-11 provides a framework for residual-unbalance limits and correction planes. Choose the requirement for your actual rotor and duty.

The balancing brief should state the final component condition, operating speed, mounting method and treatment of keys or retained hardware. Record permitted correction locations so material is not removed from a functional vane or an insufficiently thick region.

07A CLEARER CASTING PURCHASE

The sample connects the finished rotor to its pump setting

Relia's new-part route moves from drawing review to sample manufacture and inspection, then your confirmation before batch production. For an impeller, the sample evidence should identify the bore, locating face and vane envelope together. Any ordered balancing record needs to describe that same final rotor configuration.

Your installation check then sets the intended clearance and retention in the actual pump. A dimensional report helps explain that setting; the separate pump trial establishes hydraulic performance at its defined duty. This division gives an OEM a useful component approval without confusing an accurately measured impeller with a tested complete pump.

Sample output

Finished connection and vane feature report

Buyer check

Pump clearance and retention setting

08A CLEARER CASTING PURCHASE

A repeat order preserves the approved hydraulic version

A small impeller revision can change more than appearance. Changing the outer diameter, vane height, bore location or correction region may affect the installation or performance basis. Keep these features and the selected finish in the approved production definition.

For repeat supply, distinguish a dimensional concession on one part from an approved design revision. If you change the mating casing, shaft or clearance-setting method, include that change in the impeller review. This prevents an unchanged part number from silently carrying incompatible assembly expectations.

09A CLEARER CASTING PURCHASE

Surface treatment and packing protect functional geometry

Sandblasting, spray painting, powder coating and custom treatments are offered. Allocate treatment by surface: a coated bore or locating face can change fit, and buildup on a clearance-sensitive face changes the supplied geometry. Show masking and final-condition requirements on those regions.

Separate impellers so vane edges cannot strike one another during transit. Protect finished bores and locating faces, identify the approved revision and retain batch identity. The receiving check should find the same geometry and finish that were accepted on the sample.

Surface

Mask bore and clearance-sensitive regions

Packing

Separate vane edges and finished faces

10A CLEARER CASTING PURCHASE

A finished impeller definition ready for repeat supply

A repeatable impeller order joins the released vane design, GGG50 requirement, CNC shaft connection and final surface state. Relia can supply the shell-mould casting and finishing work around that complete component. The practical comparison is the rotor ready for your next assembly operation, including the specific inspection and any balancing scope you need.

Start with the vane model and bore/retention drawing, quantity and pump duty. We can discuss the sample, the surfaces left as cast and the features finished for installation. Keep the approved geometry and configuration with later releases so a repeat part number carries the same hydraulic and mechanical meaning.