Air Fuel Proportional Control Valve Burner Gas Solenoid Valve VG
15R03
safety:
1. Corrosive media: plastic king solenoid valve and all stainless
steel should be selected; for strongly corrosive media, isolation
diaphragm type must be used. For the neutral medium, the solenoid
valve with copper alloy as the material of the valve shell should
also be selected. Otherwise, rust debris often falls off in the
valve shell, especially in the occasion of infrequent movement. The
valve for ammonia cannot use copper.
2. Explosive environment: the corresponding explosion-proof
products must be selected, and waterproof and dustproof products
should be selected for outdoor installation or dusty occasions.
3. The nominal pressure of the solenoid valve should exceed the
maximum working pressure in the pipe.
applicability:
1. Medium characteristics
1) Different types of solenoid valves are selected for gas, liquid
or mixed state;
2) Products with different specifications of medium temperature,
otherwise the coil will burn out and the seals will be aged, which
will seriously affect the service life;
3) Medium viscosity, usually below 50cSt. If this value is
exceeded, a multifunctional solenoid valve is used when the
diameter is greater than 15mm; a high viscosity solenoid valve is
used when the diameter is less than 15mm.
4) When the medium cleanliness is not high, a recoil filter valve
should be equipped in front of the solenoid valve. When the
pressure is low, a direct-acting diaphragm solenoid valve can be
used;
5) If the medium is directional and does not allow reverse flow,
bidirectional flow is required;
6) The medium temperature should be selected within the allowable
range of the solenoid valve.
2. Pipeline parameters
1) Select the valve port and model according to the requirements of
medium flow direction and pipeline connection;
2) The nominal diameter is selected according to the flow rate and
the Kv value of the valve, or the same as the inner diameter of the
pipeline;
3) Working pressure difference: the minimum working pressure
difference above 0.04Mpa is optional indirect pilot; the minimum
working pressure difference is close to or less than zero must use
direct-acting or step-by-step direct.
3. Environmental conditions
1) The maximum and minimum temperature of the environment should be
selected within the allowable range;
2) In the environment where the relative humidity is high and there
are water drops and rain, waterproof solenoid valves should be
selected;
3) In the environment where vibration, bumps and impacts are
frequent, special varieties should be selected, such as marine
solenoid valves;
4) The use of corrosive or explosive environment should
preferentially select the corrosion resistant type according to the
safety requirements;
5) If the environmental space is limited, a multi-function solenoid
valve is required, because it eliminates the bypass and three
manual valves and is convenient for online maintenance.
4. Power conditions
1) According to the type of power supply, AC and DC solenoid valves
are selected respectively. Generally speaking, the AC power supply
is convenient;
2) Use AC220V.DC24V as the priority for voltage specifications;
3) Fluctuation of power supply voltage usually selects +% 10% .-
15% for AC, and DC allows about ±% 10. If it is out of tolerance,
voltage stabilization measures must be taken;
4) The rated current and power consumption should be selected
according to the power supply capacity. It should be noted that the
VA value is higher during AC starting, and the indirect pilot
solenoid valve should be preferred when the capacity is
insufficient.
5. Control accuracy
1) Ordinary solenoid valves have only two positions, open and
close, and multiple solenoid valves are required when the control
accuracy is high and the parameters are stable;
2) Action time: refers to the time when the electrical signal is
turned on or off to the completion of the action of the main valve;
3) Leakage: The leakage value given on the sample is a commonly
used economic grade.
reliability:
1. Working life, this item is not included in the factory test
items, it is a type test item. In order to ensure the quality, we
should choose the brand-name products of regular manufacturers.
2. Working system: divided into long-term working system, repeated
short-time working system and short-time working system. For the
case where the valve is opened for a long time and only closed for
a short time, the normally open solenoid valve should be used.
3. Working frequency: When the operating frequency is high, the
structure should be a direct-acting solenoid valve, and the power
source should be AC.
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