Control station PKTBA-PGS-122ZB-PSV

• Description and design features

  The control station for both smooth testing and precise adjusting of PSV and safe testing of shut-off valves. The station has module construction and equipped with the following systems:

  • Hydraulic clamping control system

  The pressure up to 250 bar is adjusted manually. Working medium –oil from the control station tank.

  • Liquid and gas “Gas over water” PSV test system up to 400 bar

  The test system up to 400 bar is equipped with additional test vessels with volume 4 and 1 L for increasing of test line volume and a DN20 supply hose. Additional test medium volume provides dynamic PSV disc lifting and precise determination of PSV set point, reseat point, provides an accurate re-seating point determination, protecting PSV sealing surfaces from damages while disc reseating.

  
  System operates using HP gas received from external source (optional unit 8) or another gas source, i.e. HP gas vessels or workshop HP gas line. The pressure in the system is limited to the supplied gas pressure. Equipment complies with following standards: ISO4126-1, API RP 576, ASME BPVC Section VIII, which are establishing the requirements for the accuracy of safety valve adjustment, and the ASMEPTC 25-2014 standard, which regulates the speed of the pressure gaining when 90% of the set pressure is reached.

  • LP air test line up to 7 bar

  Separate test line used for LP testing of PSV/shut-off valves. Uses workshop air as a pressure source.

  Manual adjusting by means of LP regulator on the control panel.

  • Filling line

  This station is also equipped with high-capacity filling pump to fill the valves tested with water. Filling hose is connected to the test table by the special tee.

  Testing process control:  Manual – using the control elements at the main panel of the station

  Test pressure ranges: 

  • Hydraulic clamping: 10 – 250 bar, manual adjusting
  • Liquid and gas “gas over water” testing of PSV: 0,5 – 400 bar using needle valves and 1L and 4L test vessels
  • LP air test line: 0,5 – 7 bar
  • Filling line: 3,5 bar

  Filling pump capacity: 

  • Liquid and gas “gas over water” testing of PSV:1x600 bar and 1x160 bar; both Ø 160 (150) mm, accuracy class 0,5; liquid filled
  • LP air test line: 1x10 Bar, Ø 160 mm, accuracy class 1, double scale bar/psi, liquid filled

control_station_pktba-pgs-122zb-psv.pdf