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SAFETY INSTRUCTION

WARNING:

 This product can expose you to chemicals including lead, which 

is known to the State of California to cause cancer and birth defects or other 
reproductive harm. For more information go to www.P65Warning.ca.gov.

CAUTION: 

All work must be performed by qualified personnel trained in the 

proper application, installation, and maintenance of systems in accordance 
with all applicable codes ordinances.

CAUTION: 

If the backflow preventer is not installed, commissioned and

maintained properly, according to the instructions contained in this manual, it

may not operate correctly and may endanger the user.

CAUTION: 

 Make sure that all the connecting pipework is water tight.

CAUTION: 

When making the water connections, make sure that the backflow

preventer connecting pipework is not mechanically over-stressed. Over time

this could cause breakages, with consequent water losses which, in turn, 

could cause harm to property and/or people.

Caleffi shall not be liable for damages resulting from stress corrosion, misapplication or 

misuse of its products. 

This safety alert symbol will be used in this manual to draw attention to safety related 
instructions. When used, the safety alert symbol means

 

ATTENTION! BECOME ALERT! 

YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS 
MAY RESULT IN A SAFETY HAZARD.

CAUTION: 

Water temperatures higher than 100 degrees F can be dangerous.

During the installation, commissioning and maintenance of the backflow 

preventer, take the necessary precautions to ensure that such temperatures 

do not endanger people.

CAUTION: 

In the case of highly aggressive water, arrangements must be 

made to treat the water before it enters the backflow preventer, in accordance 

with current legislations. Otherwise, the valve may be damaged and will not 

operate correctly.

Содержание 573 Series

Страница 1: ...ric vent size 1 2 3 4 NPT female threaded connection with union size 1 2 sweat connection with union size 1 2 press connection with union Technical specifications Connections 1 2 3 4 NPT female with u...

Страница 2: ...echanically over stressed Over time this could cause breakages with consequent water losses which in turn could cause harm to property and or people Caleffi shall not be liable for damages resulting f...

Страница 3: ...ci pourrait causer des ruptures avec pour cons quence des pertes en eau qui leur tour peuvent causer des dommages la peopri t et ou les gens Caleffi ne pourra etre tenue responsable des dommages resul...

Страница 4: ...4 Flow rate graph 10 2 5 10 5 20 50 Dp psi G l min gpm 20 10 5 psi bar 20 1 0 5 10 2 5 15 1 0 52 0 3 Cv 0 7 VENT p psi p psi bar G l min gpm...

Страница 5: ...arrow on the valve body It also must be installed with one isolating valve and a strainer upstream and one isolating valve downstream The 573 Series FlowShield DuC AV backflow preventer must be instal...

Страница 6: ...s 1 2 S N VENT Heating system application BACKFL OW PRE V Series 573 Sizes 1 2 S N VENT Field testing installation SUPPLY Inlet test valve Upstream shut off valve Y strainer Upstream test valve 573 se...

Страница 7: ...ightness of the internal second check valve When backpressure is applied to the downstream side of the valve the internal second check valve must close back drip tight on its seat a Close shutoff valv...

Страница 8: ...8 NOTES Caleffi North America Inc 3883 West Milwaukee Road Milwaukee WI 53208 T 414 238 2360 F 414 238 2366 09 2023 For Technical Support call 1 414 338 6338 or email techsupport us caleffi com...

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