Boiler house Level controls
2
For alternative sizes to the standard DN40 (1½")
2. Selection of the valve body material and pressure rating The valve body must be suitable for the maximum pressure and temperature in the feedwater line. Standard valve types are as follows:
KE71 Screwed
SG iron body
PN25 rating (Pmax 25 bar g at 120 ºC)
KE73 Flanged
KE43 Flanged PN40 rating (Pmax 40 bar g at 120 ºC)
Cast steel body
Valve stem seals are available in normal (PTFE) or high temperature (graphite) material. We recommend the use of the high temperature seal to decrease the possibility of leakage over long term use. Valves with high temperature stem seals are suffixed 'H'.
2.3 97
To select the valve, please go to page 4
TI-S75-12 CTLS Issue 5
Page 3 of 4
Selection of Modulating Feedwater Valves Pneumatically Actuated
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