1
Introduction
1.1
Purpose of this manual
This manual provides guidance to owners and personnel in the installation, operation and
maintenance of the
Daniel
TM
Series 788DVC Digital Control Valves manual, 3-9008-556
. It is
imperative that product owners and operation personnel read and follow the information
contained in this manual to ensure that the control valve is installed correctly and is
operating according to the design certifications and safety considerations.
1.2
Description of the Model 788DVC Digital
Control Valves
1.2.1
General features of the Digital control valve
The Daniel
™
Series 788DVC Digital Control Valve operates on a balanced piston principle,
spring biased (loaded) to the closed position.
The Daniel Series 788DVC Digital Control Valves have the following characteristics:
•
Modular construction: All internal parts including seat ring can be removed with the
cylinder assembly without disturbing line connections.
•
No diaphragms or stuffing boxes
•
45° body design assures high capacity
•
Positive shut-off
•
Uniform speed-of-response
•
Linear control
•
O-ring plus metal-to-metal seat
•
Pilots and other optional accessories enable the valve to perform a variety of control
functions such as back pressure control, regulating rate-of-flow, pressure relief, surge
control, etc.
1.2.2
Control valve applications
The Daniel Model 788DVC Digital Control Valve is a solenoid operated device designed to
provide precise flow rate control and batch delivery of liquid products. It is used in
conjunction with an electronic batch control device. The Model 788DVC valve is
automatically controlled by preset 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.
User manual
Introduction
P/N 3-9008-556
October 2019
User manual
11
Summary of Contents for Daniel 788DVC
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Page 48: ...Introduction User manual October 2019 P N 3 9008 556 48 Model 788DVC Digital Control Valve ...
Page 88: ...Spare parts User manual October 2019 P N 3 9008 556 88 Model 788DVC Digital Control Valve ...
Page 90: ...Decommission User manual October 2019 P N 3 9008 556 90 Model 788DVC Digital Control Valve ...
