Technical Specification: 1" PVC True Union Ball Check Valve
1. General Product Overview
- Product Type: True Union Ball Check Valve
- Nominal Size: 1 Inch (DN 25)
- Pressure Class: Schedule 80
- Sealing Material: EPDM
- Flow Direction: Unidirectional (indicated by body arrow)
2. Material Specifications
- Body Material: Polyvinyl Chloride (PVC), Cell Classification 12454 per ASTM D1784
- Ball Material: Solid PVC
- O-Rings / Seats: Ethylene Propylene Diene Monomer (EPDM)
- Union Nuts: Heavy-duty PVC Schedule 80
- Color: Industrial Gray
3. Pressure and Temperature Ratings
- Maximum Pressure: 235 PSI at 73°F (16.2 Bar at 22.8°C) for socket/threaded ends
- Flanged Rating: 150 PSI at 73°F (10.3 Bar at 22.8°C)
- Maximum Operating Temperature: 140°F (60°C)
- Temperature Derating: Working pressure decreases as temperature rises above 73°F (23°C)
- Minimum Cracking Pressure: 2 to 5 PSI (required for positive seal in horizontal positions)
4. Design and Mechanical Features
- True Union Design: Permits easy removal of valve body from piping system for maintenance
- Full Port Design: Minimizes turbulence and pressure drop across the valve seat
- Flow Coefficient (Cv): Approximately 25 to 30 GPM
- Sealing Mechanism: Free-floating ball utilizes backpressure to seal against the EPDM seat
- Installation Orientation: Vertical (upward flow only) or horizontal positions
5. Compliance and Standards
- Material Quality: ASTM D1784 standard specifications for rigid PVC compounds
- Socket End Connections: ASTM D2467 (Schedule 80 socket dimensions)
- Threaded End Connections: ASTM D2464 (Schedule 80 tapered pipe threads)
- Safety Certification: NSF/ANSI 61 and 372 certified for potable water applications
6. Operational Restrictions
- Media Limitations: Do not use with petroleum-based oils, hydrocarbons, or concentrated solvents
- Gas Warning: Not for use with compressed air or other compressible gases
- Maintenance Requirement: Inspect EPDM seals regularly for degradation in chemical services
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