Marine, Pump and Valve Casting â From Impellers to Valve Bodies, Zero Tooling
3DPTEK delivers precision sand castings using 3D printed molds. Complex impellers with integrated cores, pump housings with internal channels, corrosion-resistant valve bodies. Prototype in 5 days, CT7 accuracy, 6 alloy families, 10 manufacturing centers. ISO 9001 certified.
Why Global Manufacturers Trust 3DPTEK for Marine, Pump & Valve Castings
From single prototypes to annual production contracts â faster delivery, zero tooling, consistent quality.
10 Manufacturing Centers
Full in-house control. 10,000+ tons aluminum capacity, 4,000+ tons iron, 3,000+ tons steel per year. No subcontracting â consistent quality, on-time delivery.
500+ Industrial 3D Printers
Our own 3DPTEK-J4000, J2500, LaserCore series printers run 24/7. Massive parallel capacity â your order never waits in a queue.
5-Day Prototypes
CAD to casting in 5 days. No patterns, no core boxes, no tooling. Design iterations at near-zero cost. Move at your development speed.
CT7 Accuracy, Every Pour
Âą0.3mm on parts up to 300mm. CMM, X-ray NDT, spectrometer on every batch. Full material certifications included as standard.
What We Cast for Marine, Pump & Valve Applications
Complex internal geometries, integrated cores, and optimized flow paths that traditional patterns cannot achieve.
Impellers & Propellers â CFD-Optimized, Single-Piece Cast
Closed, semi-open, axial, mixed-flow impellers up to 2,200mm. 3D printed cores reproduce exact CFD blade curvature. Single-piece casting eliminates welded joints â better dynamic balance, 15-30% efficiency gains. HT250, Ni-Al-Bronze, duplex stainless.
Pump Housings & Volute Casings
Single and multi-stage housings with integrated channels, mounting flanges, wear ring seats. Split-case, vertical turbine, submersible. Pour weights up to 1 ton.
Valve Bodies & Bonnets
Gate, globe, check, butterfly, ball valve bodies â single-piece cast with complex internal cavities. Class 2500, fire-safe, cryogenic. CF8M, 316, duplex, Monel, Hastelloy.
Marine Hardware & Deck Components
Stern tubes, rudder stocks, hawse pipes, propeller brackets, deck fittings. Ni-Al-Bronze (C95800) and duplex stainless for lifelong seawater corrosion resistance. Reverse engineering available.
Custom Engineered Castings
Desalination pump components, dredge casings, subsea manifold blocks, hydraulic components. Send your drawing â our engineers handle mold flow simulation before the first pour.
Case Studies â Real Parts, Real Savings
Actual projects delivered to marine, pump, and valve manufacturers worldwide.
Aluminum Pump Body â 80% Time Savings
Industrial Pump Brand, Asia| Process | 3DP Outer Mold + SLS Sand Core (4-6MPa) |
| Material | Aluminum Alloy, 200x200x120mm |
| Result | 5 days/piece, CT7, Ra12.3 surface |
Combined 3DP outer mold with SLS sand cores. Eliminated $15,000+ in pattern tooling. Customer went from 6-week lead time to same-week prototype delivery.
CF8M Multiway Valve Body â Single-Pour
European Valve Distributor| Process | 3DP Sand Mold + Gravity Pour |
| Material | CF8M (316 SS Equivalent) |
| Result | 15 days / 10 units, eliminated 3 welding ops |
Complex internal passageways cast as a single piece. Eliminated three welding operations, reduced NDT inspection time by 25%.
Large Closed Impeller for Chemical Pump
European Pump Manufacturer| Process | 3DP Sand Mold + Gravity Casting |
| Material | HT250 Gray Iron, 4 Sets |
| Result | 20 days delivery, CT7, 40% less machining |
Saved $12,000 in pattern tooling. 3D printed core blade surface reduced post-machining by 40%. Dynamic balance passed on first article.
Duplex Stainless Propeller Bracket â On-Demand
Scandinavian Shipyard| Process | 3DP Sand Mold + Precision Machining |
| Material | 2205 Duplex Stainless Steel |
| Result | 12 days / 2 sets, zero pattern storage |
Legacy marine component produced on-demand without physical patterns. Full traceability documentation provided.
Equipment That Delivers Speed, Precision & Scale
Every casting starts with a 3D printed sand mold on our own equipment. No outsourcing, no bottlenecks.
3DPTEK-J4000
4,000Ã2,500Ã1,800mm. 400 L/h. The largest sand printer in our fleet. One mold per large marine component.
Binder Jetting
3DPTEK-J2500
2,500Ã1,500Ã1,200mm. 300 L/h. Workhorse for medium-large pump and valve castings.
Binder Jetting
LaserCore-5300
800Ã800Ã550mm. SLS sand. Âą0.1mm accuracy for precision sand cores and fine-detail molds.
SLS Sand
AFS-500
500Ã500Ã500mm. SLS sand. Compact precision for small cores and rapid sample molds.
SLS SandTraditional Casting vs. 3DPTEK 3D Printed Sand Mold Casting
Why pump and valve manufacturers are switching.
Traditional Pattern-Based Casting
- Pattern tooling: $5,000-$50,000 per set
- Lead time: 4-8 weeks for tooling
- MOQ required to amortize tooling cost
- Design change = new tooling
- Separate core boxes for internal features
- Draft angles constrain design freedom
- Multi-piece assembly for complex geometries
- Pattern storage and maintenance costs
- Pattern wear degrades accuracy
3DPTEK 3D Printed Sand Mold Casting
- Zero tooling â print directly from CAD
- 3-5 days to first casting
- Single piece to serial â no minimums
- Iterate designs at near-zero cost
- Complex cores printed as one piece
- No draft angle restrictions
- Single-piece casting reduces welding
- No pattern storage â print on demand
- Every mold identical â zero drift
6 Alloy Families, 30+ Grades
Full material traceability on every order.
Cast Iron
HT200, HT250, HT300, QT. 4,000+ tons/year.
Aluminum
A356, A357, AlSi10Mg, 1-7xxx. 10,000+ tons/year.
Stainless Steel
304, 316, CF8M, 17-4PH, 2205, 2507. 3,000+ tons/year.
Ni-Al-Bronze
C95800, C95500, H62, C90300. 1,000+ tons/year.
Specialty
Monel, Hastelloy, Inconel. High-temp, cryogenic.
Custom
Need a specific grade? Our metallurgists source or formulate.
Certifications & Quality Systems You Can Rely On
Every casting ships with full documentation. In-house inspection lab, complete traceability.
ISO 9001:2015
Certified quality management â order intake to final inspection.
ISO 45001:2018
Occupational health & safety. Safe, compliant across all 10 locations.
ISO 14001:2015
Environmental management. Sustainable foundry operations.
EN 10204 3.1
Full material cert â chemistry, mechanicals, NDT. Traceable to heat.
CMM (PEE=5.18um)
Zeiss-class coordinate measurement. Every dimension verified.
X-Ray & Spectrometer
Industrial X-ray NDT, spectrometer at 10pm/pixel. In-house.
From Your CAD to Your Casting â 4 Steps
A streamlined digital workflow that eliminates tooling entirely.
Submit Your CAD
Upload STEP/IGES or STL. Engineering review within 24 hours.
Print Sand Mold
3D print mold and cores directly from your CAD. No tooling, overnight.
Pour & Cast
Pour your alloy in our self-owned foundries. Full process control from melt to shakeout.
Inspect & Ship
CMM verification, NDT, full documentation. Castings arrive ready for machining.
Explore Other Casting Applications
Questions Our Marine & Pump Customers Ask
Most prototypes ship in 5-7 days from CAD approval â including simulation, printing, pouring, and inspection. Complex parts with extensive machining may add 2-3 days. Batch production (10-100 units) typically delivers in 10-20 days.
Ni-Al-Bronze (C95800 â standard for propellers/impellers), 316/CF8M stainless, 2205/2507 duplex and super duplex, Monel, Hastelloy. Also aluminum (A356, A357) and gray iron (HT250, HT300) with protective coatings. Full chemistry and mechanical reports included.
All three levels: raw (as-cast, cleaned), semi-finished (critical surfaces machined), and fully finished ready for assembly. In-house: 5-axis gantry (3x4m), V8 vertical centers, CNC turning (up to 450mm), wire-cutting EDM. Surface treatments: sandblasting, painting, anti-corrosion coatings.
Yes â a core use case. Send the original part or 3D scan. We recreate the CAD model, optimize gating, and produce castings matching or exceeding the original spec. Typical turnaround: 2-3 weeks from receiving the sample. Ideal for obsolete pump/valve components where OEM tooling no longer exists.
EN 10204 3.1 material certificate (chemistry + mechanical properties), dimensional inspection report (CMM data), visual inspection report. For pressure-containing parts: X-ray or dye penetrant NDT. Full traceability: raw material heat number, mold batch, pour date, heat treatment cycle, inspector sign-off.
One piece. Zero tooling means zero setup cost to amortize. Order a single prototype, verify, then scale. Per-unit cost decreases with volume due to pouring efficiency, but we never require a minimum order.