303
Screwed End Silent Check Valves
Series 303 Screwed End Silent Check Valves are designed to prevent surge, backflow, and water hammer in liquid service. These check valves are available in cast iron, bronze, or stainless steel; pressure and temperature conditions will dictate the appropriate body material. For air and gas applications, consult factory.
Features
- Spring closes disc before flow reversal, preventing surge and water hammer
- Disc begins to open at 0.5 psi (34.5 kPa), and opens 1/4 inch per inch of line size
- Disc is center guided to ensure alignment in both fully open and fully closed positions
- Choice of body material, depending on pressure and temperature conditions
Literature
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Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:
| ASSE | CSA | FM Approvals | NSF |
| UL | ULC | USC | WQA |