Steam Flash Drum Level Control Valve
Steam Flash Drum Level Control Valve
(OP)
Hi,
For controlling condensate level in a low pressure steam condensate flash drum we are using a globe valve 1-1/2" in a 4" pipe. Calculation shows that flashing occures inside the valve. Any suggestion for changing the existing trim and or changing the piping layout. Process conditions are P1=40.6 psig, P2=18.99 psig, Flow= 6500 kg/hr, Temp=141 deg C.
The valve is about 9 feet below drum outlet nozzel and the valve outlet pipe line runs UPWARD toward the condensate header.
Thanks.
For controlling condensate level in a low pressure steam condensate flash drum we are using a globe valve 1-1/2" in a 4" pipe. Calculation shows that flashing occures inside the valve. Any suggestion for changing the existing trim and or changing the piping layout. Process conditions are P1=40.6 psig, P2=18.99 psig, Flow= 6500 kg/hr, Temp=141 deg C.
The valve is about 9 feet below drum outlet nozzel and the valve outlet pipe line runs UPWARD toward the condensate header.
Thanks.





RE: Steam Flash Drum Level Control Valve
Followings are few guidelines:
1) Do not install a steam valve at the bottom of a down header.
2) Do not install a steam valve at the bottom of a down header without providing a steam trap near the inlet side of the valve.
3) Do not locate a condensate return valve more than 3 feet away from a flash tank or condenser.
4) Do not install a valve in a pipe more than twice the diameter of the valve.