Emerson Daniel 788DVC User Manual page 50

Operating conditions and specifications
October 2019
Table 2-1: Operating conditions for the control valve
Condition type
Maximum safe working
pressure
Materials of construction
Valve capacity
50
Description
Flange connections/Ratings (DIN) for valve sizes DN50 and DN400:
• DIN PN16 MWP at 120 °C: 16 bar
• DIN PN25 MWP at 120 °C: 25 bar
• DIN PN40 MWP at 120 °C: 40 bar
Flange connections/Ratings (ANSI) for valve sizes 2"-8":
• Class 150 MWP at 100 °F: 285 psi
• Class 300 MWP at 100 °F: 740 psi
* MWP: Maximum Working Pressure
Main valve body: Steel, ASTM-A352 Gr. LCC
Main valve cylinder:
• NPS 2-4: Stainless steel
• NPS 6 and larger: Nickel coated steel
Main valve piston: Stainless steel (standard)
Seat ring:
• Class 150 and 300:
— NPS 2-6: Stainless steel
— NPS 8: Nickel coated steel
O-Rings:
• Standard: FKM
• Optional: CR, EPR, FKM V1289, NBR, FFKM, FKM GLT
• For other material contact the factory
External hook up:
• Class 150 and 300:
— NPS 2-6: Carbon steel/Stainless steel 10 mm (0.375")
— NPS 8: Carbon steel/Stainless steel 13 mm (0.5")
Other internal parts: Stainless steel
C is a capacity coefficient that defines as the number of US gpm of
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water that flows through a valve with a pressure drop of 1 psi across
the valve. Daniel valves have the following C
• NPS 2: 86 gpm
• NPS 3: 186 gpm
• NPS 4: 309 gpm
• NPS 6: 688 gpm
• NPS 8: 1296 gpm
*C based on wide open valve with water temperature at 16°C (60°F)
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User manual
P/N 3-9008-556
(continued)
:
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Model 788DVC Digital Control Valve