Data Sheet

EH and EHA Valves
D100042X012
Product Bulletin
51.2:EH
April 2015
25
Table 15. Flowing Pressure Drop Limits for NPS 6 CL2500 Fisher EHD/EHT and NPS 8 CL2500 EHAD/EHAT Valves (w/o
Cavitrol III or Whisper Trim III)
VALVE
PRESSURE
RATING
FLOW
MEDIA
STEM SIZE, mm (INCHES)
MAXIMUM FLOWING PRESSURE DROP
Bar PSI
Flowing
Down
Flowing up with
Diverter Cone
Flowing
Down
Flowing up with
Diverter Cone
CL2500
All except boiler
feedwater
19.1 mm (3/4 inch) 69 --- 1000 ---
50.8 mm (1-inch) 69 --- 1000 ---
31.7 mm (1-1/4 inch) 138 431 2000 6250
Boiler feedwater 31.7 mm (1-1/4 inch) 69 431 1000 6250
1. 31.7 mm (1-1/4 inch) S20910 stem with 50.8 mm (2-inch) plug to stem connection.
BOTH GASKET CONSTRUCTIONS
O-RING CONSTRUCTION ONLY
(SOUR SERVICE)
O-RING CONSTRUCTION ONLY
BOTH GASKET CONSTRUCTIONS BOTH GASKET CONSTRUCTIONS
BOTH GASKET CONSTRUCTIONS
NOTES:
For recommended service applications, See table 15.
O-ring construction limited to 232°C (450°F), laminated graphite construction limited to 427°C (800°F) for oxidizing service and
593°C (1100°F) for non-oxidizing service.
CF8M (316 SST) valve bodies are available for use with trim 60 up to 232°C (450°F).
CF8M valve bodies are available for use with trim 61 up to 232°C (450°F).
Trim 49 and 63 are only good down to -29°C (-20°F).
4
2
3
1
1
49
63
5
5
Figure 21. Pressure/Temperature Limits for Trim Material Combinations (NPS 1-1/2 x 1 through 6 Globe Valves)
(also see table 15)