... ,plastics and chemical,etc. The patented QGX design uses s spring-loaded piston that applies balanced pressure on the seal ring to ... free floating to accommodate angular and offset misalignment. With its spring -loaded piston and reverse seal,the Tengxuan Technology QGX seal technlogy ... under the most difficult operating conditions,The QGX is related up to 235 degree(455 F),11 bar (160 psig), and ...