Emerson Daniel 1770, User Manual

Page: 44 / 80

Operating conditions for the Model 770 control valve
(continued)
Table 2-1:
Condition type Description
Maximum safe working
pressure 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
• DIN PN64 (class 300) MWP at 120 °C: 51 bar
• DIN PN64 (class 600) MWP at 120 °C: 64 bar
• DIN PN100 MWP at 120 °C: 100 bar
Flange connections/Ratings (ANSI) for valve sizes 2"-16":
• Class 150 MWP at 100 °F: 285 psi
• Class 300 MWP at 100 °F: 740 psi
• Class 600 MWP at 100 °F: 1480 psi
* MWP: Maximum Working Pressure
Materials of construction O-Rings:
• Standard: FKM
• Optional: Neoprene
™
, EPR, FKM V1289, Nitrile, 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 (0.372")
- NPS 8-16 Carbon steel/Stainless steel 13 mm (0.5")
• Class 600:
- NPS 2-6: Stainless steel 13 mm (0.5")
- Can be furnished in metric sizes
Other internal parts: Stainless steel
Pilot spring ranges Class 150-300 Class 600
(kPa) (PSI) (kPa) (PSI)
0-138 0-20 345-690 5-100
0-276 0-40 345-1724 50-250
207-552 30-80 1379-2758 200-400
485-1241 70-180 2413-4482 350-650
1034-2413 150-350 4137-6550 600-950
2413-4482 350-650 6205-10342 900-1500
Spring selection based on control
pressure set point. Refer to
Section 2.3 Pilot spring selection
for details.
2.1.1 Design considerations
Some conditions to consider:
• Service operating pressure
Operating conditions and specifications
34 Differential Control Valve