Graco Inc 309475F Introduction, Adjustment knob Spring, Valve plunger, Fluid Inlet, Fluid Outlet

Introduction

Introduction

A fluid pressure regulator is used in air-assisted spray systems to ensure accurate, positive control of fluid pressure to a spray gun, dispensing valve, or atomizing head.

Aregulator installed at a circulating line take-off or pump reduces main line pressure to maintain the desired fluid pressure to the spray gun, dispensing valve, or atomiz- ing head.

Models 233771, 233772, 234268 and 234269 (FIG. 1.) are mechanically operated back pressure regulators that limit the supply pressure to a set value by opening an outlet and guiding back excess material when the prede- termined pressure has been achieved. These valves are used in circulating systems.

Models 233767, 233814, 233768, 234260, 234264, and 234265 (FIG. 2.) are mechanically operated fluid pres- sure regulators designed primarily for use with low to medium viscosity fluids.

Models 233760, 233769, 233770, 233813, 234259, 234266, 234270, and 234271 (FIG. 3.) are pneumati- cally operated fluid pressure regulators designed pri- marily for use with highly viscous coatings.

Adjustment knob

Spring

	Valve plunger
Fluid Inlet	Fluid Outlet
(From gun)	(Return line)

TI1770A

Fig. 1. Cutaway of Mechanical Back Pressure Regulator

6 309475F