1. Exposed type full lift spring safety
valve is usually chose for steam boiler using.
2. Low lift spring safety valve is usually chose when the medium
is liquid.
3. Sealed Fall lift Spring safety valve is usually chose when
the medium is air or other
4.Full lift inner safety valve is usually chose for tank-truck
for liquefied petroleum gas using or tank car for liquefied petroleum
gas using .
5. Pilot operated safety
valve is usually chose for Christmas tree using
6. The pilot operated safety valve with functions of safety and
controlling is usually used in turbine high pressure bypass of
steam-electric power equipment
7. The safety valve with release level should be chose when the
opening-test is demanded regularly. Disc can be lifted slightly
at the fluid pressure above 75% of opening pressure
8. If temperature of medium is higher, the safety valve with radiator
should be chose to bring down the temperature of spring cavity
when operating temperature above 300¡æ in sealed type safety valve
or above 350¡æ in exposed type safety valve.
9. Bellow seal safety
valve should be chose when backing pressure of valve is changed
and amount of change above 10% of opening pressure.
10.If the medium is caustic, bellow seal safety valve should be
chose to protect important parts from fault.
Pay attention in installing and maintaining safety valve
1. All kinds of safety valve should be installed vertically
2. There should be no resistance in exit of safety valve to avoid
pressure
3. Safety valve should have special test and seal test before
installation
4. Using-safety-valve should be checked regularly
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