Fisher D and DA single-port, high-pressure valves are
widely used in oil and gas production industries. These
valves are especially useful for either throttling or
on/off control of liquids or gases which are gritty,
sticky, or which have a tendency to build up on internal valve parts. The DA valve is also useful in angle piping or other applications where a self-draining valve is desired.
Features include
Heavy-Duty Construction – Massive guiding positively aligns the valve plug in the seat ring for
high pressure drop applications. The screwed-in
seat ring completely encloses the seat ring gasket.
Easy Maintenance – Screwed bonnet/body joint
allows repair or maintenance with a minimum of
tools.
Severe Service Capability – Valve is available with
VTC (ceramic) trim for service in very erosive
applications. The valve plug is also available with a
tungsten carbide tip and the seat ring can be fitted
with a full-bore tungsten carbide insert for erosive
service.
Meets Variety of Specifications – Valve body and end connection constructions are available for API as
well as ASME standards.
NACE Trim Standard – NACE trim and bolting
materials are standard for all applications. These
materials comply with the requirements of NACE
MR0175-2002.