NSF/ANSI 61 material handling. POM for precision valve internals. PA66+GF pump housings with established supplier track record. Sealing surfaces to ±0.025 mm.
Water treatment components span a wide range of mechanical and chemical demands — from precision flow-control orifices in POM to structurally loaded pump volutes in glass-filled PA66. Material selection error here causes field failures in potable water systems.
The go-to material for valve internals, ball seats, flow restrictors, pump impellers, water-meter measuring chambers, and faucet cartridges. Its 0.20 friction coefficient against steel, 0.25% water absorption, and excellent chlorinated-water resistance make it the precision-mechanism workhorse of the water treatment industry.
Key properties:
We have established suppliers with direct track record producing water pump upper and lower housings in PA66+33%GF with NSF/ANSI 61 certified materials. This is not a capability claim — it is a documented supplier relationship.
Key properties:
ABS handles system housings, filter cartridge end-caps, dispenser fascias, and cosmetic covers where water contact is indirect or incidental. PA6 reinforced covers non-pressure structural roles in softener heads — note that PA6's 3% equilibrium moisture absorption makes it unsuitable for sealing-surface applications.
NSF/ANSI 61 is mandatory in 43+ US states for components in contact with potable water. There is a critical distinction that many suppliers get wrong:
The resin grade itself carries an NSF listing from the material supplier. This is what we provide — traceable, named-grade resins with existing NSF listings.
✓ What Aurora Precision delivers
The finished part undergoes migration testing and audit as a complete article. This certification belongs to your brand as the OEM — it requires your product and your end-use claim.
→ Your responsibility as the OEM
| Feature | Material | Tolerance ± | Notes |
|---|---|---|---|
| O-ring groove diameter | POM | ±0.025 mm | Mold-fixed, critical for seal compression |
| Valve seat bore | POM | ±0.03 mm | Annealing post-mold recommended |
| Flow restrictor orifice | POM | ±0.02 mm | ±5–10% flow accuracy achievable |
| Pump housing bore | PA66+GF | ±0.10–0.12 mm | GF-reinforced, 48h conditioning before QC |
| Threaded fitting (NPT) | POM/PA66 | Per ASME B1.20.1 Class 2A/2B | ISO 228 for BSP |
| General housing wall | ABS | ±0.10–0.15 mm | ISO 20457 TG6 baseline |
Upper and lower covers in PA66+33%GF NSF-listed material
Ball seats, cartridges, and flow control in POM copolymer
Orifice-critical POM components to ±0.02 mm
ABS and PA66 enclosures for filtration systems
Control valve internals and manifold bodies
PA66+GF as lead-free alternative to brass
Specify your NSF/ANSI 61 requirement upfront. We'll confirm material traceability and sealing-surface tolerance before we quote.
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