TPi September 2016

32 / 68

30 Tube Products International September 2016
products & developments
Features of metal-seated ball valves and
special alloy ball valves
As well as soft-seated ball valves, Valwell
Development Enterprise Co provides
customers with further options, with
metal-seated ball valves and special
alloy ball valves.
The metal-seated ball valves provide
excellent sealing between ball and
seats by metal-to-metal design. Coating
materials include hard chrome and
tungsten carbide, with precisemachining
to achieve a zero-leakage promise. The
valves offer advantages such as tight
shut-off, low torque design, fire safe,
abrasion and corrosion resistance, and
a wide range of operating temperatures
up to 500°C.
Valwell Development can manufacture
the ball valves with special alloys by
austenitic, super austenitic, nickel-
based alloys, and duplex and super
duplex alloy, which can be supplied on
request.
Special alloys provide a number of
characteristics, including maintaining
high performance of mechanical strength
under high operating temperatures, and
corrosion resistance in difficult working
environments.
The metal-seated ball valves and
special alloy ball valves are suitable
for applications in the chemical,
petrochemical, marine/offshore, oil/gas,
refining, and pulp/paper industries. The
ball valves are available in sizes from
½" to 24".
Valwell Development, established in
1998, specialises in the design and
manufacture of ball valves and blind
flange valves, with full product ranges
including conventional, metal-seated,
multiple-way, high-pressure ball
valves.
The company will be exhibiting at Valve
World Expo in Düsseldorf, Germany, on
stand 3H02.
Valwell Development Enterprise Co,
Ltd – Taiwan