Nok Corporation
Nok Refrigerant O-rings
Manufacturer: Nok.
Features
- Low temperature resistance, refrigerant resistance, and refrigeration oil resistance are all made of excellent rubber materials.
Specifications
| Required Characteristics | General EPDM | HNBR for Refrigerants | Low-Temperature HNBR | |
|---|---|---|---|---|
| E116 | E340 | G859 | G2280 | |
| Refrigerant Resistance | ||||
| – R-1234yf (Fluorocarbon refrigerant) | ○ | ○ | ◎ | ◎ |
| – R-32 (Fluorocarbon refrigerant) | △ | △ | △ | ◎ |
| – R-290 (Natural refrigerant) | ✕ | ✕ | ○ | ◎ |
| – R-744 (Natural refrigerant) | ✕ | ○ | ○ | ◎ |
| Freezer Oil Resistant | ||||
| – PAG | ◎ | ◎ | ◎ | ◎ |
| – POE | △ | △ | ◎ | ○ |
| Low Temperature Resistance (TR10 value) | ◎ (-49°C) | ◎ (-48°C) | △ (-22°C) | ○ (-40°C) |
- PAG: Polyalkylene glycol, POE: Polyol ester
- ※Remarks: ◎ Resistant.
- ◯ Resistant except in certain cases.
- △ Not resistant except in certain cases.
- ✕ Not resistant.
