... silicone seal pads: 1. Any design and color are available. 2. Good quality and reasonable price FDA grade silicone seal pads ... sealing,pressure vessel,gas compressor,reaction vessel,heatexchanger,boiler,filter and so on.Main advantage:First,excellent anti-chemical character. ... Four,long service life.Material:NBR,FFKM,VMQ,PTFE,PU and so on (according to your requirements )Operation conditions:Pressure ...