SPECIFICATIONS
IOM-011 Page 4 of 20
CP2G, CP5G, CP35G
Rev: F
Last updated: 7/9/2018
1.2 D
ESCRIPTION OF
P
RODUCT
The Constant Pressure Sample
Cylinder is designed for use in
systems where it is necessary to
extract and isolate accurate
product samples by maintaining
a steady pressure from the
pipeline to the cylinder. The
cylinders are equipped with a
magnetic indicator and a
graduated scale set to specify
the capacity of the device.
During continuous sampling,
when the magnetic indicator
reaches the 80% mark, all
sampling should be stopped. A
pneumatic supply pre-charges
the cylinder with pressure to
correspond with pipeline pressure. Pre-charging allows the sample to be transferred to the
cylinder without taking a pressure drop. An internal piston in the cylinder helps to purge
out air and contaminants prior to taking the sample by displacement.
During the purge process, the piston is pushed to the end of the cylinder, also preventing
any other possible contaminants from entering. Burst discs and gauges are also included
on each end cap of the device. In the event that the cylinder is overpressurized, these
discs will rupture, relieving excess pressure from the cylinder. CP-2 Premium Purge
model cylinders have valves built into the pre-charge and product end cap ports. They are
also included with product purge and pre-charge purge valves.
Adjustable relief valve (optional)
The adjustable relief valve functions as a safety device for the unit.
During continuous sampling and transportation of the cylinder, the
relief valve assures that the device maintains a constant pressure
and does not exceed maximum allowable pressure. The valve will
relieve any pressure that exceeds the set pressure.
Figure 2
Figure 1
