Deringer 20/20G
Lightweight Stainless Steel Double Check Valve Backflow Preventers with Integral Butterfly or OSY Shutoffs
Ames Deringer™ 20 and 20G Double Check Valve Assemblies are designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions. Deringer 20 features integral Eccentric-seal™ butterfly shutoff valves for a short lay length, and Dual-action™ checks for high performance at low- and high-flow rates. Deringer 20G also features Dual-action checks, but with OS&Y shutoff valves.
Either may be installed under continuous pressure service to protect against both backpressure and backsiphonage. Maximum working pressure: 175psi (12 bar).
Features
- Integral shutoffs for shorter lay length and lightweight construction (Deringer 20 only)
- Bow-seal™ full access cover for lower weight and easy access to valve internals
- Dual-action check module for low- and high-flow performance
- Tamper-resistant test cocks
- Prewired supervisory switches (Deringer 20 only)
Literature
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- Brochure - Ames Flow Control For Fire Protection
- Brochure - Deringer Series For Fire Protection
- Maintenance Manual - Deringer Gear Box Replacement
- Maintenance Manual - Deringer Gear Box Wiring
- Maintenance Manual - Deringer Indicator Flag
- Maintenance Manual - Deringer Tamper Switch
- Maintenance Manual - For Deringer Models 20/30 - Sizes 6 and 8 IN, For Models 20X/30X - Sizes 4 and 6 IN
- Maintenance Manual - For Deringer Models 20/30 Only - Sizes 2 1/2-4 IN
- Maintenance Manual - For Deringer Models 20G/30G - Sizes 6 and 8 IN, For Models 20GX/30GX - Sizes 4 and 6 IN
- Maintenance Manual - For Deringer Models 20G/30G Only - Sizes 2 1/2-4 IN
- Specification Sheet - Deringer 20
- Specification Sheet - Deringer 20G
- User Guide - For All Deringer Series Valves
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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 |