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The O ring is used to seal the tank.
Standard is NBR, and other options such as FKM, Silicone,
EPDM, FFKM, Kalrez®, FEP/Silicone double o-ring are available
*Kalrez® is a trademark or registered of DuPont Corporation or its affiliates.
Please select the suitable one depending on the fluid materials.
Model Description Table
| SPR | SIZE | MATERIAL |
| 65 | N: NITRILE RUBBER | |
| 71※ | V:FKM | |
| 90 | E:EPDM | |
| 100 | S:SILICON | |
| 125 | TS:FEP/SILICON | |
| 150 | P:FFKM | |
| 200 | ||
| 250 | ||
| 300 | ||
| 350 |
※Type numbers are different only for the following materials.
| Example | |
| FEP/SILICON | SPR70TS |
| FFKM | SPR70P |
＊FEP/Silicon O-rings (TS) have a silicone rubber inside to provide elasticity,
but their surface is harder than other rubbers,
so they may leak slightly depending on the operating pressure.
＊Kalrez® is a trademark or registered of DuPont Corporation or its affiliates.
Standard Tank Conformance O-ring
| Size | Compatible Tank |
| SPR-65 | TP Series (All) |
| SPR-71 | TK Series (All), TM Series (All), TM-B Series (All) |
| SPR-90 | TA90N, TB1N, TN3B／5B／10B／20B, TMC5/10/21 |
| SPR-100 | TA100N, TMC30／39 |
| SPR-125 | TA125N, TB3N |
| SPR-150 | TA150, TB5N, TN30／39 |
| SPR-200 | TA200／201, TB10N／20N, TN50A |
| SPR-250 | TA253／254, TB21D, TN100A |
| SPR-300 | 300A ferrule/flange |
| SPR-350 | TAB350, Other 350A ferrules/flanges |
