TOMOE Valve Limited, a global leader in the design and manufacture of valves and process control systems, has introduced a new rotary control butterfly valve that provides accurate control and low noise levels, even at high velocities.
TOMOE valves are renowned for unparalleled levels of leak-tightness, longevity and wear resistance. In addition to these benefits, the new DTM valve features the latest anti-cavitation technology pioneered by TOMOE engineers that delivers superior control and low turbulence in the line due to its straight through flow path. Mr Toru Aoki, General Manager, Tomoe Japan explains:
“Cavitation in valves is typically caused by rapid falls in low static pressure and fast pressure recovery. It can be overcome by building in various anti-cavitation features during the initial stages of design to determine the final shape of the valve. Previously, when examining the parameters producing cavitation and its growth, it was often concluded that it was not possible to analyse the differential pressure equation because of the occurrence of a vortex or reverse flow. TOMOE engineers completely resolved these issues and, consequently, TOMOE became the first company to develop valves for the 21st century that produce such low noise levels at high velocities.”
As a result, the DTM valve has a 20dB reduction in noise-eliminating cavitation problems and associated damage to the piping and equipment compared to conventional valves. Also, unlike other butterfly control valves, the DTM provides a wide range of control from closed to fully open with its wide rangeability 100:1. It can handle extremely high differential pressure with control in the opening range of 0 – 30% and differential pressures greater than 2MPa making it the ideal choice for high pressure, high temperature, low flow and highly corrosive process applications.
The DTM is also available with an optional RPTFE seat which provides zero leakage to ISO 5208 Rate A.
A new high performance diaphragm pneumatic actuator that is compact, highly accurate and has proven long life in the field manages the DTM valve actuation process.
New DTM process valve from TOMOE delivers accurate control and low noise 21st October 2009