Watts Series SD-3 Dual Check Valves
Series SD3 is a dual check with atmospheric port designed for the protection of the water supply from carbon dioxide gas and carbonated water.
These substances can flow from post-mix beverage systems and are very acidic. If the acidic water comes in contact with copper tubing or copper pipe, it will cause the leaching of copper salts into the water supply.
The dissolved copper if ingested can cause nausea, abdominal pain, and in some cases vomiting.
The SD3 prevents the reverse flow of potentially contaminated water into the potable water supply due to back pressure backflow and is used for continuous or intermittent pressure conditions.
The SD3 atmospheric vent provides a visual indication of failure in the event that the downstream check fails and system backpressure exceeds the supply pressure.
The Watts SD3 is recommended for use on Post-Mix Carbonated Beverage Equipment and dispensing equipment for tea and coffee.
Features:
Certified to ANSI/NSF Standard 18, Manual Food and Beverage Dispensing Equipment
ASSE 1022 Approved Dual Check with Atmospheric Vent
316 stainless steel body for corrosion resistance
All rubber compounds comply with FDA food additive regulations
Streamlined body design minimizes pressure loss and cavitation
A wide variety of custom end connections are available
Endurance tested for more than 500,000 pumping cycle
Atmospheric port provides visual indication of failure of the second check
Wye pattern strainer model for water supply installations
Surcharge applied to items shipped to AK, HI or PR