CALEFFI 574 Series Manual

CALEFFI 574 Series Manual

Testable, reduced pressure zone backflow preventer
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574 series testable, reduced pressure zone backflow preventer
© Copyright 2018 Caleffi
ASSE 1013
Technical specifications
Materials
Body:
Cover:
Check valves:
Springs:
Diaphragms and seals:
Isolation ball valves, inlet and outlet
Body material:
Ball:
Handle and nut:
Seat ring and packing gland:
Gland nut:
Stem:
Performance
Suitable Fluids:
Max. working pressure:
Max. working temperature:
Pressure test ports:
Connections:
Certifications
1. ASSE 1013/CSA B64.4, certified by ICC-ES, file PMG-1433.
2. Complies with NSF/ANSI 372, Drinking Water System Components-Lead Content Reduction
of Lead in Drinking Water Act, California Health and Safety Code 116875 S.3874, Reduction
of Lead in Drinking Water Act, as certified by ICC-ES, file PMG-1360.
Function
The backflow preventer can be used in all systems where there is
danger of the potable water supply system being contaminated. It
prevents an accidental reduction in the pressure in the distribution
system from causing backflow from contaminated water in
user installations. The valve is ICC-ES certified to ASSE 1013 and
CSA B64.4. It complies with codes IPC, IRC, NPC and UPC for
use in accordance with the US and Canadian plumbing codes,
and standard NSF/ANSI 372, low lead.
Product range
574 series
Testable reduced pressure zone backflow preventer
code 574004A...................................................size ½" NPT female
code 574064A............................................................size ½" press
code 574050A...................................................size ¾" NPT female
code 574056A............................................................size ¾" press
1
www.caleffi.com
574 Series
DZR low-lead brass, EN 1982 CB752S
DZR low-lead brass, EN 12165 CW724R
peroxide-cured EPDM
upstream, intermediate, downstream
½" NPT female & press
¾" NPT female & press
H0003953.01
PSU-POM
stainless steel
C89833 bronze
304 stainless steel
steel
PTFE
brass
low lead brass
water
150 psi (10 bar)
150°F (65°C)

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Summary of Contents for CALEFFI 574 Series

  • Page 1 H0003953.01 www.caleffi.com 574 series testable, reduced pressure zone backflow preventer 574 Series © Copyright 2018 Caleffi Function The backflow preventer can be used in all systems where there is danger of the potable water supply system being contaminated. It prevents an accidental reduction in the pressure in the distribution system from causing backflow from contaminated water in user installations.
  • Page 2 SAFETY INSTRUCTION / CONSIGNE DE SÉCURITÉ 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. Ce symbole d'avertissement servira dans ce manuel à...
  • Page 3: Principle Of Operation

    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 legislation. Otherwise the valve may be damaged and will not operate correctly. ATTENTION: Dans le cas de l'eau fortement agressifs, des dispositions doivent être prises pour traiter l'eau avant qu'elle ne pénètre dans le disconnecteur, conformément à...
  • Page 4: Installation Diagram

    Installation The installation of backflow preventer should only be carried out by qualified personnel in accordance with applicable codes and regulations. The backflow preventer includes an upstream and downstream shut-off valve. Install the unit in an accessible area which is not susceptible to accidental flooding. The equipment is to be installed horizontally only.
  • Page 5 Maintenance Since the backflow preventer valve is used to ensure the safety of domestic water supplies it must be inspected per local codes. The first sign that the equipment is not functioning properly, generally associated with the presence of sand or other impurities is indicated by a permanent leakage through the discharge.
  • Page 6: Hydraulic Characteristics

    Hydraulic Characteristics (LPM) (1/2 inch) 574004A (3/4 inch) 574064A 574050A 574056A FLOW RATE (GPM) Size Max. Cv ½" ¾"...
  • Page 7 RAPID INSPECTION PROCEDURE Close downstream -Permanent leakage Upstream valve or Dismantle and shut-off valve -No leakage discharge valve inspect leaking -Discharge does not open. Leakage is Close upstream minimal and lasts shut-off valve and Dismantle and Discharge blocked more than 1 minutes. open upstream inspect -Discharge opens...
  • Page 8 Procedure for 1. Release the pressure by unscewing the examining pressure test. Remove the cover bolts. internal parts 2. Pull out the core assembly and contrast spring. 3. Remove the split rings holding the check valves in place with pair long-nose pliers.
  • Page 9 4. Remove the upstream and downstream check valves using common pipe wrench or suitable size pliers. After examination after replacing any necessary components when reinstalling check valves make sure the split rings are perfectly located in the seat.
  • Page 10: Spare Parts

    574004A 574064A (½”) Spare parts Discharge assembly Terungslagklep bovenstrooms Dräneringsventil Dispositivo di scarico Discharge device Auslaufvorrichtung Dispositif de décharge 574004A Upstream check valve Ref # Backflow code # Upstream check valve Terungslagklep benedenstrooms Uppströms backventil Ritegno a monte Vordruck-RV 574064A Clapet amont Downstream check valve Afvoermechanisme...
  • Page 11 574050A 574056A (¾”) Spare parts Discharge assembly 574050A Upstream check valve Ref # Backflow code # 574056A Downstream check valve 59471 Discharge valve seat 59469 Air gap 59470 Spare part code # Deflector 59472 Pressure test port 39623 Iinspection Cover Split ring Inspection equipment Body...
  • Page 12 Application diagram Caleffi North America, Inc. 3883 West Milwaukee Road Milwaukee, WI 53208 T: 414.238.2360 F: 414.238.2366 8-20-20...

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