Pump Solutions Group Neptune Relief Valves - Manual (Page 2)

Back Pressure and
Relief Valves
BULLETIN BP-08
Back Pressure and
Relief Valves
Purpose
BACK PRESSURE VALVES maintain a set
pressure at the pump outlet port (discharge)
to assure accurate metering and are also used
to prevent syphoning. Use of the Back Pressure
Valve assures proper metering pump check valve oper-
ation when the system pressure against which the pump
is injecting fluid is too low.
The Back Pressure Valve is a required accessory when pumping
to a low pressure injection point below the tank level or when
pumping from a bulk tank with a high head pressure.
RELIEF VALVES protect the piping and system from overpressure.
Discharge is piped to tank.
Features
BACK PRESSURE VALVES
• Broad range of valve body materials
• Long life Teflon ® diaphragm
• Field adjustable to a maximum
back pressure of 50 psi
• Low maintenance
RELIEF VALVES
• Broad range of valve body materials
• Long life Teflon ® diaphragm
• Field adjustable to a maximum
pressure of 150 psi
• Low maintenance
• Two port design on 1/2" models
• Right angle, three port design on
3/4" and 1" models eliminate the
need for a separate “T” fitting in the
piping (two port design available
only for 1-1/2" units).
MODEL
BP-SS
MODEL
BP-PVC