Core Laboratories offers two series of back pressure regulators for the maintenance of pressure in
laboratory test systems. These regulators are used in maintaining the pressure in
flow studies, PVT studies, Supercritical Fluids tests, and batch and continuous
flow reactors. Our regulators are used to control the flow of either single or
multi-phase flow. They operate via a balanced pressure system.
Gas, at the desired
set point pressure, is injected into the dome of the regulator. This pressure seals
off the fluid or gas flow from the process. Once the process pressure into the regulator
exceeds the dome pressure, the diaphragm will flex and allow the fluids and gas
to pass, thus maintaining the process pressure. When the pressure of the process
drops below the dome pressure, the diaphragm will again seal off the process and
maintain the pressure.
The BP series offers either an elastomeric diaphragm or a Teflon®diaphragm. The
elastomers used are either Buna-N or Viton®. These elastomers are recommended for
lower pressure applications, up to 1,000 psi. For higher pressures to 5,000 or 10,000
psi, the Teflon® diaphragm is recommended. In the event that solids may pass through
the regulator, the flow ports can be enlarged to prevent possible plugging of the
The BPR series offers a thin metal diaphragm with a needle assembly attached to
the diaphragm. As the diaphragm flexes, the needle assembly is pulled off the seat
and fluids and gases can pass through the regulator. This design is recommended
for two phase flow or where very precise pressure regulation is required.