Description
Watts 0061667 SD3-FN 3/8" Dual Check with Atmospheric Port for Carbonated Beverage Machines
This 3/8 inch dual check valve backflow preventer with atmospheric port and strainer for carbonated beverage machines prevents the reverse flow of polluted water, such as carbon dioxide gas and carbonated water, from entering into the potable water supply due to backpressure backflow. It is designed for continuous or intermittent pressure applications and ideal for use on post-mix carbonated beverage equipment and dispensing equipment for tea and coffee. This valve consists of stainless steel body construction, female NPT end connections, internal rubber components and an atmospheric vent and a wye pattern strainer. Includes an atmospheric port that provides visual indication of failure of the second check.
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.
- 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
- Atmospheric port provides visual indication of failure of the second check
- Strainer model for water supply installations
- Includes strainer
- For carbonated beverage machines
- Can be installed vertically or horizontally
- Maximum working pressure is 150 psi (10 bar)
Specifications
Backflow preventer body and adapters are of 316 stainless steel construction and all rubber components comply with FDA food additive regulations. All materials in contact with the potable water are in compliance with the requirements of the Safe Drinking Water Act, Public Law 93-523, National Interim Primary Drinking Water Regulations. Strainer manufactured from NSF approved acetal plastic.
Standards
ASSE 1022
Installation: The valve can be installed horizontally or vertically (flow up or flow down). The valve should be installed so that the strainer and the valve are accessible for service and maintenance. In the event the second check valve becomes fouled, the vent port opens to atmosphere and water and CO2 Gas is discharged. Connect a vent discharge line to the vent outlet of the SD3 and vent to a safe place of disposal with adequate ventilation in order to prevent personal injury or damage. The valve should be installed such that water discharge from the vent will not cause damage to the surrounding equipment or property. The device should not be installed inside a wall or in a concealed location. Copper tubing shall not be used on the downstream side of the backflow preventer used in carbonated systems. Copper tubbing can be used downstream for non carbonated systems such as coffee makers.
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