Brochure

Steam Vent Valve
Boiler startup requires a gradual temperature and pressure
increase in the steam distribution system in order to
minimize stress on equipment. A steam vent is useful to
vent low temperature and pressure steam containing a
large amount of moisture. This allows for a gradual warm
up of the steam system. In the event of a pressure surge,
the vent system prevents overpressure of critical assets.
Vent valve applications have potential for noise and
vibration due to the high ow and pressure drops
experienced. Noise attenuating trim can reduce noise and
vibration to acceptable levels. A vent diffuser can also be
used for additional noise abatement and allow the valve
to operate at a lower pressure drop ratio. Valve shutoff
is important as any leakage results in wasted energy.
Another consideration to make is valve trim material. Trim
must be able to withstand high steam temperatures while
maintaining a high level of shutoff.
12 | Fisher
®
Olefin Production Solutions
Test programs are conducted on Fisher control valves, valve
trim, silencers, diffusers, and spargers as well as tees, elbows,
reducers, and expansions to determine their contribution to
overall noise.