FLEX User Instruction – 21TEM14546 EN
Page 11 of 43
3.2 FLEX design
The following sections describe the functions of the primary components in the FLEX. For further
clarity, refer to Figure 1 and Figure 12 (page 30) for isometric and exploded views of the device.
3.2.1 Vessel
The vessel acts as the primary pressure containment boundary for the device and contains
passageways (called ports or nozzles) that direct flow between external pipe connections and
appropriate end cover ports inside the device. The center flange allows the vessel to split in two
for access to the internal ceramic cartridge during maintenance.
3.2.2 Accessories
There are two bosses on the outside of the vessel for auxiliary equipment. One boss is fitted with
a sight-glass that allows direct observation of rotor speed using an optical tachometer to
confirm proper operation of the unit. The other boss is machined to allow mounting of an
accelerometer or other customer instrumentation.
3.2.3 End cover
The end covers on either side of the ceramic cartridge direct flow between the vessel ports and
rotor ducts. Low-pressure flow is directed through the end cover in a way that drives the rotation
of the rotor. The end covers also control pressure distribution around the cartridge to reduce
pressure forces and control leakage.
3.2.4 Rotor
The rotor provides a series of ducts that flow back and forth as it rotates to exchange pressure
between the high-pressure waste and low-pressure feed fluid streams. The rotor is designed to
minimize the region inside the ducts where the two fluid streams mix, as well as handle the cyclic
loading between high and low pressure as it spins.
3.2.5 Axle
The axle provides a bearing surface to support and center the rotor. Having this bearing surface
on the inner diameter of the rotor minimizes the amount of lubrication flow that must leak
through the bearing clearances.
3.2.6 Materials
All components that are wetted by the process fluid are made of titanium, alumina ceramic,
non-metallic, and composites that will not corrode in seawater and brine. External bolting is
made of duplex stainless steel to minimize corrosion in a salt air environment. Non-metallic and
composite materials that contact the process fluid are compatible with potable water
applications.
To Next Page
Loading...
