rider ring will inevitably lead to unscheduled downtime
and costly damages to the piston and cylinder liner.
Eliminating wear
In order to increase reliability and the mean time between
maintenance (MTBM) for non-lubricated reciprocating
compressors, the wear mechanism needs to be
eliminated altogether by using the process gas readily
available in the compressor cylinder (Figures 2 – 5).
Howden Thomassen’s Free Floating Piston (FFP
TM
)
technology creates a hydrostatic gas bearing between the
rider ring and cylinder liner. The small but continuous flow
of process gas from the gap between the rider ring and
cylinder liner creates an extremely thin gas cushion. The
piston is lifted and the rider ring no longer touches the
cylinder liner, thus eliminating wear altogether. Although
Figure 4.
Gas nozzles accommodated in the FFP rider rings.
Figure 5.
FFP design for cryogenic applications.
Giving Your
Pipework the
Right Support
with Insulation,
Isolation & Strength
Full 3D
modelling,
product
identification
and
selection
software
Leading global supplier of specialist pipe
supports to the oil & gas industry
Over 3500 tonnes of HD PUF insulated pipe
supports supplied annually
Supports and hydraulic restraints
Comlin isolation products in both moulded
and strip forms
See us at Offshore Technology
Conference, Stand No 2641-E
+44(0)1905 795500
With over 15 years experience supplying insulated pipe
supports to LNG installations, Bergen Pipe Supports
has the commercial and technical team to deliver the
optimum cryogenic pipe support solution you require.
