Since several years, DB Progetti designs and manufactures quick opening closures of various types, strictly in accordance with international regulations, for equipment that requires opening and closing operations in reduced times, such as:

  • Pig traps
  • Filters
  • Scrubbers
  • Manhole openings

The available pressure range  goes from ASME 150# to 2500#  and API 10000. The QOCs can be supplied made in carbon steel and stainless steel.

All models are available in both horizontal version (with hinge support), and vertical version (with davit support).

All the quick opening closures are also equipped with a safety system that prevents opening if residual pressure is still present inside the equipment.

The security systems are the following:

Standard lock with DB Progetti safety valve according to ASME VIII div.1 UG-35 and ASME VIII Division 2 Para. 4.8, it consists of a threaded machined plug connected to a locking system that does not allow the opening of the quick opening closure without the cap itself being unscrewed. In this way, any residual pressure can leak from the machined thread.

Key interlock security system (On customer request):
DB Progetti may include, according to customer specifications, the connection of a Key Interlock System which, through sequences specifically designed by the manufacturer, locks the opening of the quick opening closure before the unit, and the piping, have been completely depressurized..

System with locking pressure pin, made by a pivot directly connected to the device which, in case of pressure, remains in the extended position preventing the opening of the closure.