Griffco Valve HP-Series - Manual (Page 2)

INTRODUCTION
Griffco piston / diaphragm pressure relief
valves are designed to protect chemical feed
systems from over pressure damage caused
by defective equipment or a blockage in the
chemical feed line. Robust construction
ensures reliability in the rigorous service of
municipal and industrial applications. Wetted
materials include 316 SS, A 20 and Hast. C.
Available sizes: 1/4”, 3/8”, 1/2”, 3/4" and 1”
OPERATION:
Griffco high pressure relief valves operate
when the pressure in the chemical system
exceeds the preset pressure of the valve.
The piston is held against the valve seat by
an internal spring. When the preset pressure
is exceeded the piston is forced up and the
chemical flows out the relief port, to drain or
back to the chemical tank. The valves are
pre-set on request, however they are field
adjustable from 350 - 2000 psi via the
adjustment screw. The relief valve should be
set approximately 10% higher than the
system operating pressure.
INJECTION
VALVE
DRAIN
VALVE
SHUT OFF VALVE
Y-STRAINER
ISOLATING BALL VALVES
CHEMICAL
CONTAINER
GRIFFCO
CALIBRATION
CYLINDER
GRIFFCO PRESSURE
RELIEF VALVE
CHEMICAL
FEED PUMP
PULSATION
DAMPENER
GRIFFCO BACK
PRESSURE VALVE
TYPICAL INSTALLATION
HP RELIEF VALVE
RELIEF PORT