High pressure ball valve
29 Apr 2003
Parker Instrumentation has launched a ball valve range designed for high pressure operation at up to 10,000 PSIG/689 BarG. Using a novel two-piece construction, the new Hi Pro valve reduces potential leak paths to a minimum. Because integral compression tube fitting ends can be selected - avoiding the use of taper threads - the valve offers can meet the requirements of oil, gas and chemical process control applications.
The fully bidirectional Hi Pro valve is fabricated from 316 stainless steel. Available in 1/4, 3/8 and 1/2 inch sizes, or 6, 8, 10 and 12 mm metric versions, the design conforms with ANSI/ASME ratings and features a 4:1 pressure boundary safety factor, to deliver 10,000 PSIG/689 BarG operation. It meets the fire safe requirements of API 607 and BS6755 Part 2. The valve’s body end connector thread is additionally fitted with an environmental seal, protecting it from corrosion attack.
The valve mechanism works on the floating ball principle, with dynamic response seats and an anti blow-out stem, and offers and 100% bubble tight operation. PEEK (polyetherketone) seat material is used on 10,000 PSIG versions to allow the valve to operate over a wide temperature range from -54 to +232 degrees C (-65 to +450 degrees F). Alternatively, Hi Pro valves may be specified with PTFE seats for operation over -54 to +204 degrees C (-65 to +400 degrees F) at pressures to 6000 PSIG/414 BarG.
Hi Pro’s seats are designed for inherent cavity relief, assuring complete venting downstream of any process medium within the valve. The ball valve also operates with low ‘breakout’ (actuation) torque, which has been measured at 7.9 Nm (70 pound-inches) at full differential 10,000 PSIG/689 BarG pressure.
