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#CODE
- Discontinued Products
O-Rings - for Dynamic Applications, P Series (NPF25.5)
- On Sale Till 15/12/2024
- Volume Discount
•Material : Ethylene Propylene Rubber, Fluororubber, Nitrile Rubber, Silicon Rubber
For complete product overview and details on O-Rings - P Series see the sections below:
- inCAD Components
Part Number
Configured Part Number is shown.
NPF25.5
・Materials
| Type | [ M ]Material | [ H ]Hardness (JIS Hs) | Color | Operating Temperature Range | JIS Symbol | Applications | Feature |
| NPA | Nitrile Rubber | 70±5 | Black | -30~100°C | Class 1 A | Mineral Oil Resistant | Most representative material with superior oil / abrasion resistance and heat stability. |
| NPB | Nitrile Rubber | 90±5 | Black | -25~100°C | Class 1 B | ||
| NPSW | Silicon Rubber | 50±5 | Milky White | -50~200°C | - | Heat Resistant | Having excellent high and low temperature resistances, this material has the widest range of operating temperatures among synthetic rubbers. It is suitable for food-related applications. |
| NPSK | Silicon Rubber | 70±5 | Scarlet Red | -50~200°C | Class 4 C | Heat Resistant | |
| NPF | Fluoro Rubber | 70±5 | Black | -15~200°C | Class 4 D | Best in oil / chemical resistance and heat stability as synthetic rubber. Suitable for a wide range of applications. | |
| NPFH | Fluoro Rubber | 90±5 | Black | -15~200°C | - | Heat Resistant | |
| NPEG | Ethylene Propylene Rubber | 70±5 | Black | -45~130°C | - | For weather resistant items | Excellent material in weather resistance, ozone resistance and electrical characteristics. |
| NPBR | Fluororesin | - | White | Subject to O-ring | - | For high voltage use | Used when the pressure resistance of O-ring is insufficient. |
Specifications
| Part Number |
| NPSK25.5 |
■JIS B 2407 Back-Up Rings (For the P Series, Bias Cut)
[ ! ]For orders larger than indicated quantity, please request a quotation.
| Part Number | Nominal No. of Applicable O-Rings | W | d | D | T | |||||
| Type | No. | |||||||||
| NPBR (Fluororesin, White) | 15 | P15 | 2.0 | +0.03 -0.05 | 15 | +0.15 0 | 19 | 0 -0.15 | 1.25 | ±0.1 |
| 16 | P16 | 16 | 20 | |||||||
| 18 | P18 | 18 | 22 | |||||||
| 20 | P20 | 20 | 24 | |||||||
| 21 | P21 | 21 | 25 | |||||||
| 22 | P22 | 22 | 26 | |||||||
| 22A | P22A | 3.0 | 22 | +0.20 0 | 28 | 0 -0.20 | ||||
| 24 | P24 | 24 | 30 | |||||||
| 25 | P25 | 25 | 31 | |||||||
| 26 | P26 | 26 | 32 | |||||||
| 28 | P28 | 28 | 34 | |||||||
| 30 | P30 | 30 | 36 | |||||||
| 32 | P32 | 32 | 38 | |||||||
| 34 | P34 | 34 | 40 | |||||||
| 38 | P38 | 38 | 44 | |||||||
| 40 | P40 | 40 | 46 | |||||||
| 42 | P42 | 42 | 48 | |||||||
| 48 | P48 | 48 | 54 | |||||||
| 50 | P50 | 50 | 56 | |||||||
■JIS B 2401 P Series (For Mounting, Dynamic)
| Part Number | JIS Nominal Number | W | I.D. | Matching Material | |||||||
| Type | No. | do | NPA, NPB Tolerance | NPSK, NPSW NPEG Tolerance | NPF, NPFH Tolerance | d | Tolerance | D | Tolerance | ||
| NPA (Nitrile Rubber, Black) NPB (Nitrile Rubber, Black) NPSW (Silicon Rubber, Milky White) NPSK (Silicon Rubber, Scarlet Red) NPF (Fluoro Rubber, Black) NPFH (Fluoro Rubber, Black) NPEG (Ethylene Propylene Rubber, Black) | 3 | P3 | 1.9±0.08 | 2.8 | ±0.14 | ±0.21 | ±0.16 | 3 | 0 -0.05 | 6 | +0.05 0 |
| 4 | P4 | 3.8 | 4 | 7 | |||||||
| 5 | P5 | 4.8 | ±0.15 | ±0.22 | ±0.18 | 5 | 8 | ||||
| 6 | P6 | 5.8 | 6 | 9 | |||||||
| 7 | P7 | 6.8 | ±0.16 | ±0.24 | ±0.19 | 7 | 10 | ||||
| 8 | P8 | 7.8 | 8 | 11 | |||||||
| 9 | P9 | 8.8 | ±0.17 | ±0.25 | ±0.20 | 9 | 12 | ||||
| 10 | P10 | 9.8 | 10 | 13 | |||||||
| 10A | P10A | 2.4±0.09 | 9.8 | 10 | 0 -0.06 | 14 | +0.06 0 | ||||
| 11 | P11 | 10.8 | ±0.18 | ±0.27 | ±0.21 | 11 | 15 | ||||
| 11.2 | P11.2 | 11.0 | 11.2 | 15.2 | |||||||
| 12 | P12 | 11.8 | ±0.19 | ±0.28 | ±0.22 | 12 | 16 | ||||
| 12.5 | P12.5 | 12.3 | 12.5 | 16.5 | |||||||
| 14 | P14 | 13.8 | 14 | 18 | |||||||
| 15 | P15 | 14.8 | ±0.20 | ±0.30 | ±0.24 | 15 | 19 | ||||
| 16 | P16 | 15.8 | 16 | 20 | |||||||
| 18 | P18 | 17.8 | ±0.21 | ±0.31 | ±0.25 | 18 | 22 | ||||
| 20 | P20 | 19.8 | ±0.22 | ±0.33 | ±0.26 | 20 | 24 | ||||
| 21 | P21 | 20.8 | ±0.23 | ±0.34 | ±0.27 | 21 | 25 | ||||
| 22 | P22 | 21.8 | ±0.24 | ±0.36 | ±0.28 | 22 | 26 | ||||
| 22A | P22A | 3.5±0.1 | 21.7 | 22 | 0 -0.08 | 28 | +0.08 0 | ||||
| 22.4 | P22.4 | 22.1 | 22.4 | 28.4 | |||||||
| 24 | P24 | 23.7 | 24 | 30 | |||||||
| 25 | P25 | 24.7 | ±0.25 | ±0.37 | ±0.30 | 25 | 31 | ||||
| 25.5 | P25.5 | 25.2 | 25.5 | 31.5 | |||||||
| 26 | P26 | 25.7 | ±0.26 | ±0.39 | ±0.31 | 26 | 32 | ||||
| 28 | P28 | 27.7 | ±0.28 | ±0.42 | ±0.33 | 28 | 34 | ||||
| 29 | P29 | 28.7 | ±0.29 | ±0.43 | ±0.34 | 29 | 35 | ||||
| 29.5 | P29.5 | 29.2 | 29.5 | 35.5 | |||||||
| 30 | P30 | 29.7 | 30 | 36 | |||||||
| 31 | P31 | 30.7 | ±0.30 | ±0.45 | ±0.36 | 31 | 37 | ||||
| 31.5 | P31.5 | 31.2 | ±0.31 | ±0.46 | ±0.37 | 31.5 | 37.5 | ||||
| 32 | P32 | 31.7 | 32 | 38 | |||||||
| 34 | P34 | 33.7 | ±0.33 | ±0.49 | ±0.39 | 34 | 40 | ||||
| 35 | P35 | 34.7 | ±0.34 | ±0.51 | ±0.40 | 35 | 41 | ||||
| 35.5 | P35.5 | 35.2 | 35.5 | 41.5 | |||||||
| 36 | P36 | 35.7 | 36 | 42 | |||||||
| 38 | P38 | 37.7 | ±0.37 | ±0.55 | ±0.44 | 38 | 44 | ||||
| 39 | P39 | 38.7 | 39 | 45 | |||||||
| 40 | P40 | 39.7 | 40 | 46 | |||||||
| 41 | P41 | 40.7 | ±0.38 | ±0.57 | ±0.45 | 41 | 47 | ||||
| 42 | P42 | 41.7 | ±0.39 | ±0.58 | ±0.48 | 42 | 48 | ||||
| 44 | P44 | 43.7 | ±0.41 | ±0.61 | ±0.49 | 44 | 50 | ||||
| 45 | P45 | 44.7 | 45 | 51 | |||||||
| 46 | P46 | 45.7 | ±0.42 | ±0.63 | ±0.50 | 46 | 52 | ||||
| 48 | P48 | 47.7 | ±0.44 | ±0.66 | ±0.52 | 48 | 54 | ||||
| 50 | P50 | 49.7 | ±0.45 | ±0.67 | ±0.54 | 50 | 56 | ||||
| 50A | P50A | 5.7±0.13 | 0 -0.10 | 60 | +0.10 0 | ||||||
| 52 | P52 | 51.6 | ±0.47 | ±0.70 | ±0.56 | 52 | 62 | ||||
| 53 | P53 | 52.6 | ±0.48 | ±0.72 | ±0.57 | 53 | 63 | ||||
| 55 | P55 | 54.6 | ±0.49 | ±0.73 | ±0.58 | 55 | 65 | ||||
| 56 | P56 | 55.6 | ±0.50 | ±0.75 | ±0.60 | 56 | 66 | ||||
| 58 | P58 | 57.6 | ±0.52 | ±0.78 | ±0.62 | 58 | 68 | ||||
| 60 | P60 | 59.6 | ±0.53 | ±0.79 | ±0.63 | 60 | 70 | ||||
| 62 | P62 | 61.6 | ±0.55 | ±0.82 | ±0.66 | 62 | 72 | ||||
| 63 | P63 | 62.6 | ±0.56 | ±0.84 | ±0.67 | 63 | 73 | ||||
| 65 | P65 | 64.6 | ±0.57 | ±0.85 | ±0.68 | 65 | 75 | ||||
| 67 | P67 | 66.6 | ±0.59 | ±0.88 | ±0.70 | 67 | 77 | ||||
| 70 | P70 | 69.6 | ±0.61 | ±0.91 | ±0.73 | 70 | 80 | ||||
| 71 | P71 | 70.6 | ±0.62 | ±0.93 | ±0.74 | 71 | 81 | ||||
| 75 | P75 | 74.6 | ±0.65 | ±0.97 | ±0.78 | 75 | 85 | ||||
| 80 | P80 | 79.6 | ±0.69 | ±1.03 | ±0.82 | 80 | 90 | ||||
Part Number
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- *In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
- Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.
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| Part Number |
|---|
| NPF25.5 |
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Please check the type/dimensions/specifications of the part NPF25.5 in the O-Rings - for Dynamic Applications, P Series series.
Stock
-
- Stock Item Only
Specification/Dimensions
-
Application
- Mineral Oil Resistant
- Heat Resistant
- Abrasion Resistant
- Chemical Resistant
- Weather Resistance
- Cold Resistance
-
Nominal No. of Applicable O-Rings
-
type
- NPA
- NPB
- NPBR
- NPEG
- NPF
- NPFH
- NPSK
- NPSW
-
Material
- Nitrile Rubber
- Ethylene Propylene Rubber
- Silicon Rubber
- Fluororubber
-
Wire diameter W(mm)
-
I.D. do (or d)(Ø)
-
JIS Nominal Number
-
Hardness
- Hs50
- Hs70
- Hs90
- Not Provided
-
CAD
- 2D
- 3D
Days to Ship
-
- All
- Same day
- 8 Days or Less
Specify Alterations
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
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