Pressure /temperature ratings class 300, Materials, Pressure /temperature ratings class 150 – Flowserve BK 15 User Manual
Page 8: Admissible differential pressure
8
Pressure /Temperature Ratings Class 300
Body material
Forged steel 1.0460 (P250GH / C22.8) / ASTM A105
Nominal sizes (DN)
40, 50
Connections
Flanged to ASME Class 300
Service pressure PMA
[barg]
51
43.9
38.9
34.6
20.2
[psig]
740
637
565
500
293
Related temperature TMA [°C]
20
200
300
400
450
[°F]
68
392
572
752
842
Explanatory Notes
– continued –
Technical Data
– continued –
Materials
EN
DIN
ASTM equivalent
Body
P250GH (1.0460)
C22.8 (1.0460)
A105
Cover
P250GH (1.0460)
C22.8 (1.0460)
A105
Bolts
42CrMo4 (1.7225)
A193 B7
Body gasket
graphite
Regulator
stainless steel
Other internals
stainless steel
Pressure /Temperature Ratings Class 150
Body material
Forged steel 1.0460 (P250GH / C22.8) / ASTM A105
Nominal sizes (DN)
40, 50
Connections
Flanged to ASME Class 150
Service pressure PMA
[barg]
19.7
14
10.2
6.5
4.6
[psig]
287
203
149
94.3
66.7
Related temperature TMA [°C]
20
200
300
400
450
[°F]
68
392
572
752
842
Corrosion Resistance
The valve body must not be subjected to pulsating loads. The dimensional allowances
for corrosion reflect the latest state of technology.
Sizing
When used for its intended purpose the safe functioning of the steam trap will not be
impaired by corrosion.
Admissible differential pressure
1
)
2
)
Differential pressure
∆
PMX
22 barg (319 psig)
1
) Note pressure/temperature ratings
2
) Inlet pressure minus outlet pressure