Jiangsu PPH Vertical Check Valve Manufacturer Phone, Wholesale, Price [Jiangsu Jiayuan Pipe Valve Co., Ltd.] The PPH Flanged Vertical Check Valve is a valve made of polypropylene (PPH) material that automatically prevents reverse flow of the medium. Below is a detailed introduction to the PPH Flanged Vertical Check Valve: Valve Body and Disc Material: The valve body and disc of the PPH Flanged Vertical Check Valve are usually made of PPH material, which has excellent corrosion resistance and high-temperature resistance, capable of adapting to the transportation of various corrosive media. Sealing Surface: The sealing surfaces of the valve body and disc are often lined with stainless steel surfacing to enhance sealing performance and corrosion resistance. Connection Type: The valve is connected via flange, facilitating installation and maintenance.