FLOWSERVE Precision Machined Cast Iron Spare Parts Volute Casing

Our self-developed brand was founded to serve the fluid machinery and engineering sector with comprehensive technical solutions. Our ecosystem of proprietary technologies and product brands offers clients high-caliber technical consultation, sales support, and comprehensive product solutions — including pumps, frequency converters, servo drives, PLC-HMI, control cabinets, motors, mechanical seals and assemblies, couplings, gearboxes, and full-scope engineering services (overseas on-site 3D scanning reverse molding of pump replacement parts and equipment debugging by our engineers deployed internationally).

The volute casing casting process is selected based on geometry complexity, material requirements, and order quantity:

Used for complex thin-walled geometries, stainless steel, and high-precision applications:

1. Pattern Making — Wax patterns produced to exact casing geometry; runner and gating system designed for complete fill
2. Cluster Assembly — Individual wax patterns attached to sprue to form a cluster; improves production efficiency
3. Shell Building — Ceramic slurry dipped and sanded repeatedly to build a refractory shell around the wax cluster
4. Dewaxing — Autoclave steam dewaxing removes wax; shell remains as the ceramic mould
5. Mould Firing — Shell fired at high temperature for strength and dimensional stability
6. Casting — Molten metal poured into the heated ceramic shell; precision solidifies against smooth ceramic face
7. Post-Cleaning — Shell broken away; casting divested of runner, gate, and sprue
8. Heat Treatment — Normalizing, annealing, or QT as required for the specified material and mechanical properties
9. Inspection — Dimensional check, NDT, and material verification before release to machining

Used for larger casings, cast iron, and cost-effective medium-volume production:

1. Pattern Preparation — Wooden or metal pattern produced to casing geometry with allowance for shrinkage
2. Mould Assembly — Cope and drag mould halves rammed with resin sand; core prints and venting prepared
3. Coring — Sand cores placed to form internal cavities, volute passages, and bearing housing bores
4. Casting — Mould assembled and metal poured; risers and feeders ensure complete fill
5. Fettling — Mould material removed; risers, gates, and feeders cut off; sandblast cleaning
6. Heat Treatment — Stress relief or normalizing for cast iron; QT for alloy steels
7. Inspection — Full NDT and dimensional inspection before machining

No original drawings? We reconstruct a dimensionally equivalent replacement:

1. Submit worn sample or photographs with key dimensions marked
2. FARO 3D laser scanning captures full internal and external geometry to ±0.05mm
3. CAD model reconstruction from point cloud data; volute profile rebuilt to as-designed geometry
4. CFD simulation validates hydraulic performance of the reconstructed volute passage
5. Mould production and casting to the verified geometry
6. CNC machining and full QC inspection before shipment

Every volute casing undergoes comprehensive quality verification:

• Material Certificate — Mill certificate with chemical composition against ASTM, DIN, EN, ISO, TOCT
• Hydrostatic Pressure Test — 1.5× rated working pressure held for 30 minutes; no leakage or permanent deformation
• 3D CMM Dimensional Inspection — Full coordinate measurement of bearing housings, flange faces, and critical hydraulic geometry
• Non-Destructive Testing — RT and UT for internal casting soundness; MT and PT for surface and near-surface defects
• Hardness Testing — Verifies heat treatment condition and material grade compliance
• Surface Roughness Measurement — Interior volute surface roughness measured per ISO 1302
• Visual Inspection — Final check for surface defects, handling damage, and coating quality

Certifications: ISO9001:2015, ISO14001:2004, API Specification Q1.