Mogas launches rotary ball control valve for pressure, flow control
Mogas has introduced a new line of progressive rotary ball control valves called FlexStream, specifically designed for severe service, gas regulating applications.
According to the company, FlexStream combines the efficiencies of a quarter-turn ball valve with the energy dissipating properties of a tortuous trim element.
The new line has optimized features for pressure and flow control, and offers a tight shutoff that meets ANSI Class VI for soft seated valves and ANSI Class V for metal seated valves. In addition, FlexStream uses a trim element that delivers pressure reduction, velocity control, and noise reduction.
The trim element is based on a series of torturous paths created by a stack of plates inserted in the flow passage of the ball. These plates force the process fluid through a sequence of right angle turns. These turns provide the controlled velocity and pressure reduction needed to combat cavitation and flashing.
FlexStream has high rangeability with a large capacity in the fully open position, while the tailored trim element controls noise and velocity at the low flow or high ΔP flow cases. The valves can serve a wide range of gas processing applications such as gas transmission mainline inter-connectors, gas storage, and LNG compressor control.
Mogas recently supplied FlexStream for the main feed gas valves in a new LNG facility in Australia. The 10- and 24-in. (25- and 61-cm) ANSI 1500 custom designed FlexStream valves offered a number of pressure reduction stages to reduce noise and velocity at the low flow/high ΔP start-up condition while being able to keep the pressure drop at full operating conditions to a minimum.
Standard metal-seated ball valves range in size from .5 to 32 in. (1 to 81 cm) and are available in 150 to 4500 pressure classes.