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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 | ||
| 350 |
※Type numbers are different only for the following materials.
＊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 Compatible 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-350 | ● TAB350 |
