At our workshops equipped with washing areas, sandblasting booths, machine tools, lapping machines, painting booths, pressing and calibration benches, we perform the:
Workshop Interventions
Overhaul of Valves in the Workshop
- overhaul and pressing of manual and motorized shut-off valves;
- overhaul and calibration of safety valves;
- overhaul, pressing and calibration of control valves;
- overhaul of electric, hydraulic and pneumatic actuators.
The Steps of the Standard Review for Shut-off Valves and Regulating Valves
The standard overhaul of shut-off and regulation valves involves the following steps:
- identification and stamping;
- disassembly of any servomotor / actuator;
- disassemblaggio completo della valvola;
- sandblasting and cleaning with suitable solvents of all components;
- check of the support seats of the body-castle coupling gasket;
- straightness control of the stem;
- visual inspection and with penetrating liquids of the sealing elements;
- lapping of the shutter seat;
- lapping of the valve body seal seat;
- stem counter-seal lapping;
- back-sealing of the castle;
- replacement of the body-castle coupling gasket;
- replacement of the seal pack (packing and / or pre-formed rings);
- restoration of the threads with possible replacement of the linkage;
- reassembly of all components;
- operation check of any servomotor / actuator;
- refitting the servomotor / actuator;
- testing according to API 598 with verbal release of pressing;
- functionality test;
- painting;
- labeling with indication of the revision date;
- insertion of flange protection covers.
