VFC for feeder pump to automatically regulate the flow.
供料泵变频控制，自动调节流量。
In the hot water system a high water tank with solenoid valve controlled water feeder is used to replace the secondary circulating pump.
热水系统中，采用电磁阀根据水箱液位进行补水，省去二次循环泵。
The invention relates to a re-pressing type liquid feeder, which consists of an oil drum, a drum cover, an inflating pump, a spray gun and a liquid conveying pipe.
复压式液体供给器，由油桶、桶盖、打气桶、喷枪及液体输送管构成。
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