Griffco-valve HP-Series Manuel d'utilisateur télécharger pdf (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

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