Watts NLF-9 - Manual

For Health Hazard Applications
ES-NLF9
Job Name –––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location –––––––––––––––––––––––––––––––––––––––––– Approval ––––––––––––––––––––––––––––––––––––––––––––––
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Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative –––––––––––––––––––––––––––––––––––––––––
Series NLF9
Dual Check Vacuum Breakers
for Laboratory Faucets
Sizes: 3 ⁄
8
" and 3 ⁄
4
" (10 and 20mm)
Series NLF9 Dual Check Vacuum Breakers for Laboratory Faucets
are used for noncontinuous pressure, health hazard, applications
and are backsiphonage backflow preventers. This series is specially
made for laboratory faucets where portable hoses can be attached
and prevent the flow of contaminated water back into the potable
water supply. These vacuum breakers can be installed on new or
existing faucets without plumbing changes.
Pressure-Temperature
Temperature Range: 33°F – 180°F (0.5°C — 82°C)
Maximum Working Pressure: 150psi (10.3 bar)
Applications
NLF9 should be installed on every laboratory outlet where a hose
can be attached. Its unique design provides full protection against
all backsiphonage conditions.
To prevent tampering, it is recommended that the NLF9 be secured
to the laboratory faucet with Loctite.
Use NLF9 for non-continuous pressure applications.
NLF9
Hose
Connection
Combination
Fixture
Recommended Strainer
Watts Model 27
NLF9
Laboratory Faucet
Construction
NLF9 is suitable for either hot or cold water service. It features brass
construction and a primary check valve utilizing a soft disc which
seats against a soft rubber mating part to ensure tight closing. A
secondary check valve utilizes a soft disc-to-metal seating. NLF9
provides better-than-average flow rate and consequently lower pres-
sure loss. Construction is brass body with polished chrome plating,
stainless steel working parts and durable rubber diaphragm and disc.
Standards
B
A
B 1
kPa psi
207 30
172 25
138 20
103 15
69 10
35 5
0 1 2 3 4 5 6 gpm
0 3.8 7.6 11 15 19 23 lpm
Dimensions — Weights
Capacity
SIZE (DN) DIMENSIONS WEIGHT
A B B 1
in. mm in. mm in. mm in. mm lbs. kgs.
3 ⁄
8
10 2 3 ⁄
8
60 1 1 ⁄
4
32 1 25 .38 .17
3 ⁄
4
20 2 3 ⁄
8
60 1 1 ⁄
4
32 1 25 .38 .17
CSA B64.7
ASSE 1035 – “Laboratory
Faucet Vacuum Breakers”
Approvals
ASSE CSA
ES-NLF9 1322 © 2013 Watts
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca
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 without prior notice and without incurring any obligation to make such changes and modifications
on Watts products previously or subsequently sold.
A Watts Water Technologies Company