Nordson EFD 781S Series - User Manual

781S Series Spray Valve
Installation Guide
Electronic pdf les of Nordson EFD
manuals are also available at
www.nordsonefd.com
Control air
hose
Stroke control knob
Air cap retainer
Fluid inlet tting
Stroke reference ring
Nozzle air hose
Introduction
The 781S Series precision Low Volume Low Pressure (LVLP) liquid
spray valves are designed for high transfer efciency without overspray
or airborne mist and provide consistent coating of low- to medium-
viscosity uids.
781S Series valves are simple to use and will operate many millions of
cycles without maintenance. Spray valve cleaning is accomplished by
purging with the appropriate solvent.
The 781S air cylinder body and uid body are hard-coated aluminum.
The 781S-SS valve model uses stainless steel throughout.
Fluid supply line

Summary

Introduction to 781 S Series Spray Valve

Installation Guide for 781 S Spray Valve

How the Valve Operates

Calibration Feature

Recalibrating the stroke control zero position on the 781S-SS valve after disassembly.

ValveMate Concept

Overview of the ValveMate 8040 controller for spray valve output adjustment.

Specifications and Spray Patterns

Spray Patterns Coverage

Data on round and fan spray area coverage relative to nozzle type and distance.

Nordson EFD 781S Series Specifications

General

Brand	Nordson EFD
Model	781S Series
Category	Control Unit
Language	English