Materials of construction declaration for wetted and service-contact components of the CUASCHEM5.
| Component | Declared Material | Service Function | Contact Type |
|---|---|---|---|
| Outer vessel shell | FRP | Structural shell for pressure-rated feeder vessel | External structural enclosure |
| Internal vessel liner | HDPE | Primary wetted lining for TCCA feeder vessel | Direct chemical and service-water contact |
| Manifold body | PP | Flow distribution and connection branch assembly | Wetted |
| Bulkheads | PP | Connection transition through vessel wall or manifold interface | Wetted |
| Threaded fittings | PP | Connection hardware for feeder branch assembly | Wetted |
| Vessel lid | PP | Screw-style service closure | Chemical vapor and service-contact environment |
| Unions | PVC | Branch connection and service disassembly points | Wetted |
| Check valve bodies | PVC | Isolation, depressurization path, and backflow control | Wetted |
| Check valve springs | Titanium | Internal spring element for check valve operation | Wetted internal hardware |
| Seals and O-rings | EPDM | Elastomeric sealing at wetted joints and valve interfaces | Wetted |
| Tubing | LLDPE | Connected process tubing and sample routing | Wetted or service-contact depending on location |
The materials listed above are used in the CUASCHEM5 for public pool chemical feeder duty involving TCCA tablet media, branch-flow water service, and the operating pressure and temperature ranges declared in the engineering compliance dossier.
Material declaration prepared from manufacturer-declared component information for the CUASCHEM5 submission package.