Griffco Valve High-Flow Series - Manual (Page 3)

TYPICAL INSTALLATION
INJECTION
VALVE
CHEMICAL
CONTAINER
GRIFFCO HF BACK PRESSURE /
ANTI-SIPHON VALVE WITH OPTIONAL
PRIMING VALVE
GRIFFCO
CALIBRATION
CYLINDER
GRIFFCO HF
PRESSURE
RELIEF VALVE
CHEMICAL
FEED PUMP
PULSATION
DAMPENER
OPTIONAL PRESSURE RELIEF PIPING
Y-STRAINER
ISOLATING BALL VALVES
DRAIN VALVE
SHUT OFF VALVE
MAINTENANCE:
The pressure relief and back pressure valves were
designed with minimizing the amount of maintenance
required to keep the valves in operation. However,
periodic replacement of the diaphragm is required. A
parts kit can be purchased from your local Griffco Valve
distributor. To facilitate inspection and replacement, the
valve layout is such that removal of the diaphragm can
be done without taking the valve out of the chemical
line.
Caution: Ensure the system is not under pressure
and that the chemical lines are flushed with water
before disassembly.
Unscrew the pressure adjustment screw to remove the
pressure from the diaphragm. Remove the 4 bolts and
lift off the valve top.
After the diaphragm and the valve seat have been
inspected and replaced if necessary, (White PTFE side
down), check the adjustment spring. Make sure there is
no rust or corrosion. Place the support disc the spring
onto the valve body and slide the top back over the four
bolts.
Tighten the 4 bolts, and then replace the adjustment
screw. Turn the adjustment screw clockwise to
approximately the same position as it was prior to
disassembly. If an exact pressure setting is required or
a different pressure is desired a pressure gauge should
be used to verify the setting. Turning the adjustment
screw clockwise will increase pressure.
DIMENSIONS
:
A
C
B
D
Warranty:
GRIFFCO Valve, Inc. warrants its products against defects in workmanship and materials for one year under normal use or 18 months from date of shipment
whichever occurs first. All obligations and liabilities under this warranty are limited to repair or replacement (at our option), FOB our plant such allegedly defective units as are returned
to our factory transport prepaid. Repairs or replacements are made subject to inspection of returned items.
This warranty does not extend to damage by corrosion or erosion. The materials of construction offered are recommendations subject in all cases to acceptance by the customer.
These recommendations, based on previous experience and best available information, do not constitute guarantees against wear or chemical action. Expressly excluded from this
warranty are defects caused by misuse, abuse or improper application, installation or operation of the unit. No liability for consequential damages or reinstallation labor is accepted.
GRIFFCO Valve, Inc. will not assume responsibility for contingent liability for alleged failure of its products.
D A (in) B (in) C (in)
1/2” 5.90 3.50 1.25
3/4” 5.90 3.50 1.25
1” (4.5”) 7.56 4.50 1.28
1” (5”) 7.56 4.90 1.28