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DANIEL MODEL 788DVC DIGITAL CONTROL VALVES DEC 2012
TM
INTRODUCTION 1-1
1.0 INTRODUCTION
The Daniel Model 788DVC Digital Control Valve is a solenoid operated device designed to
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provide precise flow rate control and batch delivery of liquid products. It is used in conjunction with
an electronic batch control device such as the Daniel DL8000. The Model 788DVC valve is
automatically controlled by the DanLoad for low flow start-up, high flow rate control, low flow
shut-down, and final shut-off. It also provides for maximum flow meter accuracy by maintaining
a constant flow rate in applications with varying line pressure. The Model 788DVC features an
external pilot control loop that consists of a normally open solenoid pilot, a normally closed solenoid
pilot, strainer and opening/closing speed controls.
1.1 Aggressive Products
Some Daniel control valves have been equipped with an “AP” (Aggressive Products) cylinder
assembly. This cylinder assembly may be supplied as a direct replacement for existing units or may
be supplied with the original order. It is designed for all Daniel 2", 3", 4" and 6", 150/300 lb. ANSI,
Series 700 Valves. Spring-loaded Teflon cup-seals are utilized on the main body piston and low
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swell Nitrile O-rings in static positions. For specific instructions for receipt, installation and
maintenance of Control Valves containing the “AP” Cylinder Assembly reference manual 3-9008-
554. Also contained within this manual are complete instructions for retrofitting existing standard
valves with the “AP” Option package.
If you have questions or need information not contained in this manual, please contact your Daniel
sales representative or the Daniel Measurement and Control service center nearest you.