Emerson 788 DVC manual Connections, Valve Capacity, Flow vs. Pressure Drop See Figure

INMETRO Certification:

- Certificate Number:

- INMETRO Marking:

D E C 2012 DANIELTM MODEL 788DVC DIGITAL CONTROL VALVES

NCC 12.1244 X

Ex d nC IIB T3 Gc

Ex d IIC T* Gb

*See Tables 1 and 2 in the certificate for temperature range details.

Special condition for safe use: When the digital control valve is assembled with solenoid models 80174, 80173, 80143, 80144, HP80143, 8014G2 and F8003G1, the temperature of the process fluid must not be greater than 40°C.

Connections

2" through 6" ANSI flanged

Valve Capacity

Valve Size	2"	3"	4"	6"	8"
Cv* - gpm	86	186	309	688	1296

*Cv based on valve full open using water at 60/F (16/C)

For Valve Flow vs. Pressure Loss see Figure 3-1. Consult manual 3-9008-550, Capacity Charts for valve sizing.

Flow vs. Pressure Drop (See Figure 3-1)

Curve A - Wide open valves with no spring resistance.

Applicable to pilot operated valves with Y and Z ports vented to sump, atmosphere or pump station.

Curve B - Light main valve spring.

Applies only to On-Off valves, rate of flow control valves and check valves with ANSI 150 to 300 lb. flanges.

Curve C - Medium main valve spring.

Applies to all modulating control valves except rate of flow and valves using ANSI 600 lb. flanges.

Curve D- Heavy main valve spring.

Applies to all valves using ANSI 600 lb. flanges.

3-2 SPECIFICATIONS