CSA SCF Manual
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CSA SCF Manual

Combination air valve
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CSA products for waste water
Combination air valve
Mod. SCF

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Summary of Contents for CSA SCF

  • Page 1 CSA products for waste water Combination air valve Mod. SCF...
  • Page 2 CSA air valve Mod. SCF Introduction This manual will provide you with the information to properly install and maintain CSA Mod. SCF waste water air valve. They are for use by personnel who are responsible for installation, operation and maintenance of CSA Air/Vacuum valves.

  • Page 3: Table Of Contents

    CSA air valve Mod. SCF Contents Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4...

  • Page 4: Description

    CSA air valve Mod. SCF Description The CSA SCF combination wastewater air valve is designed to allow the entrance of large volumes of air in case of negative pressure conditions, caused for example by pump failure, burst, draining, and the discharge of large volumes during filling. During working conditions, the air release system will purge our air pockets accumulating inside the valve.

  • Page 5: Installation

    Tighten the flange bolts or studs in a crisscross pattern and minimum of four stages.  Due to the high capacity in terms of flow rate of SCF possible and unexpected rapid filling and transient events may cause the liquid to reach high levels inside the air valve, before stabilizing to the safety required value.

  • Page 6: Maintenance

    CSA air valve Mod. SCF Maintenance The combination wastewater air valve SCF is automatic in operation and requires very little maintenance. It should always be installed in a vertical position with a maximum tilt within 4°. A semi-annual visual inspection for leakage is recommended as well as a check of the O-rings on the seat (ref picture on page 7).

  • Page 7: Drawing

    CSA air valve Mod. SCF Drawing SCF DN50/65 cap                       Component Material Lower body GJS 500-7/GJS 450-10 Upper body GJS 500-7/GJS 450-10 GJS 500-7/GJS 450-10 Float AISI 316 Float shaft AISI 316 O-ring NBR/EPDM/Viton/Silicone Driving sleeve AISI 303/AISI 316...

  • Page 8: Troubleshooting

    CSA air valve Mod. SCF Troubleshooting (ref. drawing 1 on page 7) Condition Possible Cause Corrective Action Loose flange bolting. Tighten flange bolting. Blown flange gasket. Replace flange gasket. Valve leaks at flange joint. Miss-alignment or damage to Adjust miss-alignment or repair field piping and supports.

  • Page 9: Guarantee

    You shall be solely responsible for determining suitability for use and in no event shall CSA Srl. be liable in this respect. CSA Srl does not guarantee resistance to corrosion, erosion, abrasion or other sources of failure, nor does CSA Srl guarantee a minimum length of service.

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