Back pressure maintaining valves –
spring or dome loaded
Back pressure maintaining valves
regulate the inlet pressure to keep this
pressure at a constant level. This means
the valve will open to reduce excessive
pressure in the line, or close when the
pressure drops below the set point.
> Ideally suited for maintaining
the output pressure from the
compressor or dryer
> Port sizes: 1/4" to 3"
> Pressure range: 100 to 420 bar
> Flow rate: up to 10 000 Nm
3
/h
> Temperature range: -20 to +80°C
> Body materials: Aluminium bronze,
Brass or Stainless Steel
Proportional pressure control
valves
Functioning in the same way as the
spring and dome loaded regulators,
except the output pressure is controlled
by an electrical signal. They can be
used to control the pilot pressure onto
a dome loaded pressure regulator
and therefore automate a pressure
control process.
> Port sizes: 1/4" or flange mounted
directly on dome loaded regulator
> Pressure range: up to 420 bar
> Temperature range: -20 to +80°C
> Control signal: 4-20 mA or 0-10V
> Internal closed loop control
> Body materials: Brass or
Aluminium bronze
Proportional
pressure
control
valve
pressure
relief
valve
Pressure relief valves
The valve opens to the atmosphere if
the inlet pressure rises above the pre-
set point. Excess pressure is therefore
relieved from the system in a safe and
controlled manner.
> Port sizes: 1/4" to 1" 1/2
> Pressure range: up to 450 bar
> Pre-set pressure range: up to
450 bar
> Tamper proof seal
> Body materials: Aluminium bronze,
Brass or Stainless Steel
ENERGY 9
Pressure control
solutions
