What are the tips for selecting high quality electromagnetic pulse valves?

Select all imported high-quality brands: electromagnetic pulse valve is the heart of dust removal equipment, its total price is about 5% of the total price of pulse jet duster; it is 1% cost of air box pulse dust collector, choose the highest quality The import pulse valve is only 1 to 2% higher than the total cost of equipment made with domestic valves. Therefore, it is least worthwhile to save equipment costs on the pulse valve and bear the risk of failure of the entire dust removal system.
Choose a valve manufacturer with a long history: The valve manufacturer must have more than 10 years of production history and successful operation cases, so as to ensure that the pulsed electromagnetic valve product has a perfect quality assurance system and truly achieves 100,000 injections for 5 years. .
Choose a 3-year free warranty period: the number of test actions of the pulse valve is not sufficient to explain the quality of the valve, and the diaphragm must pass the age of natural aging factor test. Therefore, the valve supplier must provide the free warranty period for the diaphragm and solenoid coil, which is generally 3 years.
The choice of a pulsed single-bag filter with an actual blowing volume is not limited to the connection size: the interface size of the pulse valve cannot always be used to determine the cleaning function.
Pulse valves with high, medium, and low pressure ranges can be selected: The pulse valve must have a pressure range of at least 1 to 8 kg/cm2. In this way, if the resistance of the filter material increases with time during the application process, the airbag pressure can be adjusted to maintain the good running resistance of the filter and ensure that the filter material does not stick to the bag.
Selecting the production quality of the pulse valve: The manufacture of the valve must be a fully automatic production line equipped with a robot and a CNC center to eliminate the unequal production quality due to human processing. On a dust removal system, the entire system is often paralyzed due to the leak of a valve.
Select low-resistance pulse valve: the internal structure of the pulse valve needs to ensure that the injected gas volume is large, the diaphragm stroke is long, and the internal structure of the housing makes the valve resistance small according to the hydrodynamic design. Due to the improper design of the valve body, some 3” interface valves can only inject the air volume of the “1~”2 interface valve. The use of low-resistance, high-injection pulse valve can make each valve clearer. Large area of ​​filter material greatly saves the overall cost of the blowing system.

R141B,Dichlorofluoroethane (HCFC- R-141b) is a nontoxic and colorless chemical with small ODP value and excellent chemical stability. Since its physical and chemical properties are similar to those of CFC-11 and CFC-113, it can substitute refrigerant R-11 as foaming agent for rigid or soft PU foam without changing process and equipment, or CFC-113 as metal cleaner and solder- remover as well. Refrigerant R-141b has following characteristics:

 1. Chemical Stability: It can be stored at room temperature without decomposition.

 2. Dissolvability: It can dissolve in most organic solvents, alcohol and ether. It has excellent compatibility with grease and lubricant, and no obvious effects on most polymers including plastics and rubbers.

 3. Toxicity: The toxicity trials conducted by Allied Signal and Atochem indicate that it has no irritant effect on hum an skin and eyes, but inhalation of high-concentrated refrigerant R-141b will cause anaesthetic effect.

 4. Flammability: HCFC-141b is inflammable, it should be stored in ventilated place without flame.

 

R141B Refrigerant

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