... .O ring Silicone Seal Ring/NBR Rubber Seal Ring The Details: ItemSilicon Seal Ring/Viton Seal Ring/NBR Rubber Seal RingMaterialNBR,SBR,EPDM ... good self-lubricating property. Can make no oil lubrication seal. 5.Seal Ring simple structure, convenient installation. 6.Work pressure: ... /s; Working temperature: 250 degrees and 55. 7.Seal Ring applicable medium: hydraulic oil, gas, water, mud, crude oil, the ...