Henan Gongwei Machinery Equipment Co., Ltd. is based in China and lists an ultrasonic vibrating screen for superfine particles and a linear vibrating sieve for screening perlite. The ultrasonic vibrating screen is described with an ultrasonic controller, converter and resonance loop, and features a self-cleaning function for sieve cloth in the 50~625 mesh range. The linear vibrating sieve is described as WZS series equipment for fine grain and powder materials, with adjustable screen inclination via support leg height. Both items are packed in wooden cases or as requested. Buyers can send an enquiry through Global Trade Plaza.