can be defined as the means of operating the valve that depends on the basic
kind of valve.Before choosing an actuator the factors that should be taken into
consideration are size of the valve, its location and function in a system, frequency
of operation, as well as the degree of control desired. A few general type of actuation are gear, hand, chainwheel, spring,
lever, motor, servo,solenoid, gravity, pressure and flow rate of the fluid
media, etc. Generally, a specific type of valve is limited in its operation.For
example the actuators like relief and safety valves are spring actuated, while
the check valves are spring or gravity actuated, however high pressure globe
valves are usually actuated by motors, chainwheels, etc.
valve to be used usually determined by the desired closure member. On the other
hand, the selection of a valve type will typically determine the type of
closure member. Some examples of the common closure members are like ball, gate,
disc, plug as well as pop.
end fitting is quite important for a valve. The kind of end fittings to be specific for a valve is usually
determined by the quality of the piping system into which it must be inserted. A
few most common fittings are like
brazing end, compression, butt weld ends, , flange, flared, hub ends,hose ends,
pipe thread, socket, quick disconnect and solder ends. It is wise to use for
high pressure as well as high temperature conditions. The threaded fitting
should be considered mostly.
nature of the fluid to be carried like the operating pressure, temperature, various
kind of closure member, seat along with the aspects like weight, cost, etc
determine the material selected for valve trim. To deal with high pressure
service and/or high temperatures always consider numerous kind of nickel alloys, steels, titanium alloys or
comparable materials of greater strength.while the control of corrosive liquids
and gases calls for the metal like nickel alloys, stainless steels, ceramic
materials and various plastics. However the steam service believe bronze, cast
iron steel and similar metals.and lastle the nuclear valves call for titanium,
special steels and other alloys developed particularly for this type of services.
Among all the cases stern use conditions, the producer literature should be
consulted to find out the suitability of a exacting valve.
different type of valves have different valve seats.Those may differ in
material,geometry, rigidity, etc. The conical valve seats can provide a wide
sealing surface which minimizes wire drawing. For narrow sealing surface a
conical seat is most desirable type to provide very tight sealing at low
pressures.Where spherical or ball seats have almost same characteristics as a
conical seat. But, they are expensive to produce. Moreover, flat seats are used
commonly in valves that need not be leaktight as they usually do not seal
completely at low pressures.
About Adamant Valves.
Founded in 2002, Adamant Valves, as a global
sanitary valves manufacturer and valves supplier, has grown to become one of
the leading valves manufacturers for high precision stainless , sanitary butterfly
valves, pumps and pipe fittings. Adamant Valves uses advanced numerical control
machine tools, processing and testing facilities to ensure that our products
will meet your expectations for reliable performance and quality.