Three-way electric valve selection method?
Electric three-type regulator valve selection basis:
First, according to the pipeline parameters to choose the electric two-way regulator valve: diameter Specifications (that is, DN), interface mode
1, according to the field pipeline diameter size or flow requirements to determine the diameter (DN) size.
2, interface mode, General >DN50 to choose Flange Interface, ≤DN50 can be freely selected according to user needs.
Second, according to the fluid parameters to choose the electric two-way regulator valve: material, temperature group
1, corrosive fluid: it is advisable to choose corrosion-resistant electric three-way regulator valve and all stainless steel; edible ultra-clean fluid: it is advisable to choose food grade stainless steel electric two-way control valve.
2, high-temperature fluid: To choose the use of high-temperature electrical materials and sealing materials made of electric three-to-three control valve, and to choose the piston type of structure.
3, Fluid state: Large to have gaseous, liquid or mixed state, especially when the caliber is greater than DN25 order must be distinguished.
4, fluid viscosity: Usually under 50cSt can be arbitrarily selected, if this value is exceeded, you should choose a high viscosity electric two-way control valve.
Third, according to the pressure parameters to choose the electric three-type regulator valve: Principle and structural varieties
1, nominal pressure: This parameter and other general valve meaning is the same, is based on the pipeline nominal pressure to set.
2, work pressure: if the work pressure is low, you must choose the direct or step straight principle, the minimum operating pressure difference in more than 0.04MPA when the direct, step-through direct, pilot type can be selected.
Four. Electrical Selection: voltage specifications should be as priority as possible to choose ac220v more convenient
Five, according to the length of continuous working time to choose: often closed, often open, or sustainable electrification
1, when the electric three-in-three regulator valve needs to be opened for a long time, and the duration of the excess closure should be selected often open type.
2, if the opening time is short or the time of opening and closing is not much, then choose the normal closed type.
3, but some of the working conditions used for safety protection, such as furnace, kiln flame monitoring, can not be selected often open, should be selected for long-term power-on type.
Six, according to environmental requirements to choose auxiliary functions: Explosion-proof, stop back, manual, Waterproof fog, water, diving;
1, explosive environment: must choose the corresponding explosion-proof grade of electric three-phase regulator valve (my company’s existing: DIIBT4, DIICT5, ExmI/IIT4).
2, when the need for electric three-way regulator valve on-site manual operation, you can choose our company Seil/seio series with manual function electric three-way control valve.
3, open-air installation or dust multi-occasions should choose Waterproof, dustproof varieties (Protection level above IP54).
4, for the fountain must use submersible electric three-phase control valve (protection level above IP68).