electric valve - Selection guide and replacement guide
The basic parameters of the selected electric actuator
Power supply voltage : Average regular choice AC220V, AC380V, DC24V also available.
Protection Level : Average regular choice IP65, IP67, easy to explosive situations should then choose explosion-proof.
Signal feedback : one is active feedback signal , output signal and the feedback it has the same actuator input power ; the other is a passive signal feedback , feedback output signal power supply voltage it can be a remote signal display device provided or to reflect the relative more flexible.
Heater : When the electric valve continued to work in wet or frost environment , built-in heater ensures that the electric actuator internal electronics normal working life.
Handwheel function : When the control system, power or electric actuator fails, you can take temporary emergency operations .
Torque parameters: first determine the valve torque , and then press the valve torque choice , ① steam or non- lubricated medium security value increased by 25% ; 60% increase in security value ② non-lubricated dry gas medium ; particles ③ non-lubricated gas transportation 100% increase in dielectric powder safe value ; ④ for cleaning , lubricating medium friction safe value increased by 20% , according to the gas source and the working pressure , the pneumatic actuator torque lookup table to provide accurate linear actuators . ( NOTE: This security is recommended. )
Ball Floating ball Structure: Drive axis connected with the ball core upper and lower ball core suspension , bi- elastic sealing lip seal or leaf spring loaded valve seat structure.
Features: Stable performance, good sealing , attractive appearance, stainless steel using silica technology, optional flatbed (ISO5211 standard ), WCB beautiful and durable surface phosphate processing , medical benefits
Application: It is the most widely used pneumatic valve, common to all occasions
Slim Ball Structure: Referring to the Italian thin ball design, structure and similar floating ball .
Features: The compact body length of only about 50% of the ordinary ball , attractive appearance , the use of silica sol process , ISO5211 installation standards.
Application: Widely used in various applications , especially for small mounting space applications.
Fixed Ball Structure: Upper and lower ball cores are designed with a drive connected to a fixed axis , optional , single or bi-directional sealing sealing sealing structure .
Features: Diameter range, stable performance, flexible seal can pass powdery solid , anti- blocking impurities from excretory function .
Application: Suitable for large diameter , containing powder , impurities, slurry , fiber media applications.
Tee Ball Structure: Floating ball core , divided into three-way L -type , T -type channel structure.
Features: Optional three-way reversing, merging , diversion eight kinds of ways of distribution.
Application: Applicable to piping systems for a variety of media distribution methods occasions.
Lined ball valve Structure: Floating ball core , fixed ball valve
Features: Ball core , valve chamber , and export all lined PTFE sealing surface .
Application: Suitable occasions acid, alkali , special corrosive media such as benzene .
Insulation valve Structure: Floating ball core , fixed ball valve
Features: Other types of ball valve on the outside of the original cast or welded layer of insulation plus jacket , the jacket layer can pass into the water , oil and other heat transfer medium .
Application: Suitable for medium requires heating or insulation control the flow of the occasion .
Butterfly Butterfly valve Structure: Disc center, the radius of the center axis of the valve body , in the same center line .
Features: Simple structure, low cost, select NBR, EPDM, PTFE and other sealing .
Application: Suitable for ambient temperature and pressure of water, gas, oil, ordinary media applications.
Eccentric butterfly valve Structure: Disc center, the radius of the center axis of the valve body , not in the same center line .
Features: Friction , long life , high temperature resistance, corrosion resistance ( depending on material terms ) .
Application: Applicable to impurity , powder, high temperature and other media applications.
Lined butterfly valve Structure: Disc center, the radius of the center axis of the valve body , in the same center line .
Features: Simple structure , the valve plate , the valve sealing surface and all PTFE lining .
Application: Suitable occasions acid, alkali , special corrosive media such as benzene .