Product details： 1。Always keep great sealing performance not mater it's swing or rotating。 2.Spillover proof design to protect circuit without pollution at the instant of valve body separation. 3.Imported O-type fluororubber Sealing ring are able to work at -20°~+220°. 4.Corner bend made of SUS420 with high compressive strength. 5.The material of steel ball is imported SUS440, HRC58-60. 6.Sealing surface roughness Ra≤0.1 ,keep more longer time for abrasion resistance&rust resistance. 7。Cage shell and steel ball are designed to rotating smoothly。 8.Plastice bearing with carbon fibre for self-lubricating installed in the inner center.