VALVE SEATS AND INSERT RINGS

LIMA boasts decades of experience in the production of seats and insert rings, assembled inside valves then used for gas and oil pipelines, oil rigs, cryogenic plants and devices for the chemical industry.

Both seats and insert rings have to guarantee the higher sealing during the functioning of the valve. The particular working conditions, the complexity of operations, enormous costs due to eventual lock of the plants impose the highest degree of quality and resistance with regard to materials used.

It is precisely for this reason that, more and more frequently, seats and insert rings are requested in thermoplastic or elastomeric material, able to guarantee high performances in terms of mechanical resistance, elasticity, heat resistance, processibility and resistance to substances as methane, carbon dioxide, sulphydric acid, superheated steam and sulphurous hydrocarbons.

Controllo dei seggi tramite comparatore e sfera calibrata

Control of the seats with the comparator

To make the right choice we should bear in mind the parameters of fluid type , higher pressures, working temperature and the number of opening and closing cycles.

  • ABOUT VALVES

    Valve seats and insert rings: application fields, dimensional aspects, features and materials

DISCOVERING VALVE SEATS AND INSERT RINGS

SEATS

Lima is able to produce seats of more than 1.000 mm of outside diameter. The working quality is guaranteed both by our excellent technologies and by our skilled workers: all our seats are controlled by altimeters, comparators and set of calibrate spheres.

MATERIALS
  • PTFE
  • PEEK
  • PCTFE
  • PA
  • DEVLON
  • PE
  • POM
INSERT RINGS

When particularly critical situations happen, we prefer to produce metallic seats provided with a quarry in which insert a thermoplastic or elastomeric rings, able to guarantee the sealing of the valve. LIMA can produce rings up to 1.400 mm of external diameter and we have a hydraulic press specific for the carrying-out of the assembly of insert rings inside the correspondent metallic seats.

MATERIALS
  • PTFE
  • PEEK
  • PCTFE
  • PA
  • DEVLON
  • PE
  • POM
  • FKM
  • HNBR

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