... : Water, oil, weak acid, weak alkali, , etc. Temperature: -30oC~200oC o ring mechanical seals (DY412) Working Conditions: Mediums: Water, oil, weak acid ... /TC) Rotary Ring(Steel/SiC/TC) Secondary Seal(NBR/EPDM/Viton/Silica Gel) Spring and Metal Part (Steel) o ring mechanical seals (DY412 ...