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MASCOT DiskFlo Installation, Operation & Maintenance Instructions Manual

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Installation, Operation,
Maintenance Instructions
DiskFlo
Control Valves
CAUTION :
1.
Use pressure relief valves for high pressure
piping.
2.
Use explosion proof valves/accessories for
dangerous media piping.
3.
Use fire safe valves for piping where chances of
fire by external means.
4.
Use seismic proof valves where chances of
earthquake are frequent.
5.
Check whether location of the valve mounting is
of the same service/application as specified on
the marking plate.

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Summary of Contents for MASCOT DiskFlo

  • Page 1 Installation, Operation, Maintenance Instructions DiskFlo Control Valves CAUTION : Use pressure relief valves for high pressure piping. Use explosion proof valves/accessories for dangerous media piping. Use fire safe valves for piping where chances of fire by external means. Use seismic proof valves where chances of earthquake are frequent.

  • Page 2: General Information

    It has to be made sure that the flange face gasket covers the seat retainer and body and surface when installing the doing maintenance of DiskFlo rotary valves. It is advised that the valve in line between flanges. There is a possibility of excessive relevant personnel should review this bulletin thoroughly before leakage downstream in case this is not done.
  • Page 3 DiskFlo Control Valves For proper tightness, inspect the packing box bolting. The Quick Check: tightness of the Packing nuts should be slightly over finger- Before starting, the control valve should be checked as per the tight. To prevent stem leakage, tighten as necessary.
  • Page 4 DiskFlo Control Valves Ensure complete closure of the valve. For DiskFlo valves with seat retainer screws, the seat retainer Note : For valves with fail-open action, supply air pressure screws and retainer clips need to be removed. The seat retainer needs to be lifted out of the valve body. (Presented in under the actuator piston for closing the valve.
  • Page 5 (With some designs, a press may be required.) retainer or metal seat. (An interference between the soft seat NOTE : Previous DiskFlo designs need the disc to be aligned and the retainer is necessary.) Secure the retainer or metal in the body in such a way that it can properly rotate.
  • Page 6 DiskFlo Control Valves Align the actuator lever arm on the shaft so the actuator stem Remounting Actuator to Valve is centered in the transfer case. The linkage bolt needs to be It needs to be verified that the disc rotation matches the actuator firmly tightened.
  • Page 7 DiskFlo Control Valves Trouble shooting DiskFlo Valve Failure Probable Cause Corrective Action Valve moves to failure position, excessive air 1. Failure of actuator O-ring 1. Replace actuator stem O-ring bleeding from transfer case 2. Failure of sliding seal assembly 2. Repair or replace stem adapter / linkage assembly Jerky shaft rotation 1.
  • Page 8 MASCOT VALVES PVT. LTD. 166 / 167, G I D C, Naroda, Ahmedabad : 382330. India Phone : +91 79 22821619/22823369, Fax : +91 79 22822430 Email : info@mascotvalves.com / web : www.mascotvalves.com...