Watts 9BD - Manual

Model 9BD
Backflow Preventer for Vend ing
Machine Water Supply Lines
Sizes: 1 ⁄
4
" and 3 ⁄
8
" (6 and 10mm)
Model 9BD backflow preventer for vending machine water sup­
ply lines prevents backflow of carbon dioxide gas and car bon­
at ed water into the water supply system to vend ing ma chines,
thus elim i nat ing the hazardous re ac tion of car bon di ox ide with
cop per tub ing.
Its design features include a dual check valve to as sure pos i­
tive, dependable seating protection. For trouble­free longevity, it
is also equipped with a ball check valve which is a third­check
mem ber, its main func tion being to pre vent backpressure on
each pump cycle from unnecessarily acting di rect ly on the
check members. In stant check valve re sponse pre vents un nec­
es sary vent dis charge dur ing pump "off cycle".
Vent discharges C02 gas to atmosphere in the event of foul ing
or mal func tion of check No. 2 thereby safe guard ing the po ta ble
water sys tem from CO2 gas con tam i na tion. In line design min­
i miz es pres sure drop across the valve thereby assuring max i­
mum pump per for mance.
Features
• Available in Flare or NPTM end connections
• Stainless steel body and parts
• Instant check valve response
• Minimum pressure drop
• Triple check protection of the water supply
Pressure - Temperature
Temperature Range: 33ºF-140ºF (0.5ºC-60ºC)
Maximum Working Pressure; 150psi (10.34 bar)
All stain less steel body and heavy duty rubber parts as sure the
long est and most dependable operating life. All rubber com­
pounds com ply with FDA food additive reg u la tions.
Standards
Designed to meet the requirements of New York City Health
Code Sec tion 81.47.
NSF Standard No. 25, Revised Items 4.35.2 and 4.35.3.
ES-9BD
For Non-Health Hazard Applications
Water
Supply
Valve
Filter
Pump
100psi
Carbonator
H
2
O and CO
2
Backpressure 60-120psi
CO
2
Gas
Cooler
9BD Backflow Preventer
Typical Installation
9BD
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.
*The wetted surface of this product contacted by consumable
water contains less than one quarter of one percent (0.25%) of
lead by weight.
Approvals
Approved by independent testing, completing over 2,000,000
successful pump cycles with positive backflow protection and
trou ble­free performance.
All rubber compounds comply with FDA food additive reg u la-
tions.
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
LEAD FREE
*