DV series centrifugal gas separator is installed to
prevent errors due to gas and air inclusions. It is used in
custody transfer installations for petrol, aviation, and
other hydrocarbons as well as other liquids and
guarantees measurement within permissible tolerances
in the downstream flowmeter.
The DV series consists of a vertical cylinder vessel with
inlet and outlet connections located tangentially.
The automatic float controlled air release valve is
located at the highest point. The sight glass on the
valve housing provides for monitoring of air release
process. the vessel is made in carbon steel.
The liquid enters into the gas separator from the inlet connection; the velocity decrease and the pressure distribution in the rotational flow permits efficient separation of air/gas inclusions from the fluid.
The climb between the entry and exit generates on hydraulic head.
The ample permanence time permits an efficient separation of the air that takes up the upper part; when there is enough air/gas, the sphere on the diaphragm valve is no longer sustained by the fluid and then the air vent valve opens, letting the gas flow out. When the gas is completely vented out, the liquid level raises again sustaining the sphere and thus making the air vent valve close.
DV Centrifugal gas separator 
Fuel transfer
The strainer-air separators Isoil are necessary on a
measuring system as protection against the foreign matter in
the flow stream and to vent air essential for accurate
metering.
Interesting feature is the combined solution: filtering and air
separation in one vessel.
This allows a space reduction in the installation.
Strainers are designed to give a minimum pressure drop and
a maximum protection of the P.D. meter.
The main characteristics is the great filtering surface of the
basket respect to the liquid inlet/outlet section.
This allows a long working time before the strainer’s cleaning.
For specific uses of filtering only or air separation only,
strainers FA type and air separators ASV type are available.
LS/AS strainers air separators are usually used to filter petroleum products or other liquids;
the installation of strainer filters along the line is necessary to protect devices like PD meters,
valves and other equipment from damage derived by foreign particles or crusts that may be
present in the fluid flowing in the pipes.