Watts SD-2 - Manual

Model SD-2
Backflow Preventer for Carbonated
Beverage Machines
Sizes: 1 ⁄
4
", 3 ⁄
8
" (8, 10mm)
The Watts SD2 is a dual check designed for the protection
of the water supply from carbon dioxide gas and carbonated
water. These substances can flow from post-mix beverage sys-
tems 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 SD-2 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 Watts SD-2 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 1032 Approved Dual Check Valve
• 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
• Shock tested for more than 100,000 pumping cycle
Specifications
Body and adapters are of 316 stainless steel construction and
all rubber components comply with FDA food additive regula-
tions. 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.
ES-SD2
Available Models
1 ⁄
4
" (8mm) SD2-MN: Male NPT
3 ⁄
8
" (10mm) SD2-MN: Male NPT
1 ⁄
4
" (8mm) SD2-FN: Female NPT
3 ⁄
8
" (10mm) SD2-FN: Female NPT
1 ⁄
4
" (8mm) SD2-MF: SAE Male Flare
3 ⁄
8
" (10mm) SD2-MF: SAE Male Flare
1 ⁄
4
" (8mm) SD2-FF: SAE Female Flare
3 ⁄
8
" (10mm) SD2-FF: SAE Female Flare
For Non-Health Hazard Applications
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
LEAD FREE
*
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.