the introduction of control valve
Control Valve introduction
Regulator has simple structure and reliable action characteristics, but
because it is directly contacted with process medium, its performance
directly affect system quality and environmental pollution, so to
regulator must undertake often maintain and preventive maintenance,
especially for poor using conditions and important occasions, we
shouldpay more attention to the maintenance work. Main check parts:
1. body inwall
For using in high-pressure difference and corrosive medium
occasions regulator, the body wall, control valve diaphragm is often
affected by medium shocks and corrosion, must focus on checking pressure
resistance, corrosion resistance.
2. seat
When regulator works, because of medium infiltration, fixed seat
used thread inner surface is susceptible to corrosion and make the seat
loosen, when examination shall attention. To work under high-pressure
difference valve, should inspect seat sealing surface whether impact
value.
3. valve core
Valve core is adjusting work moving parts, scoured and corroded by
medium is most serious, when overhaul, should seriously check valve
spool each part whether corrode, wear, especially under the condition of
high-pressure difference, the valve spool wear is more serious (because
of cavitation phenomenon), should noticed. When valve spool badly
damaged, should undertake changing, another should also pay attention to
is whether the stem has similar phenomena, or the connection with valve
core is loosen, etc.
4. Diaphragm "O" ring and other gasket. Should check diaphragm, whether O-ring is ageing, crack damaged.
5. sealing packing
Should notice PTFE packing, whether sealing grease is ageing,
whether mating face is damaged, should be replaced when necessary
More products of valves
2012-05-22
