Catalog Searcher
Categories

PTFE Jacket Valve Stem Seal R30-A

Model R30-A / ロータリーシール / SKF (Official website) / Listed on page 55 of the document

PTFE valve stem seal for low-friction applications. The rubber energizer automatically increases preload when leakage is detected.

Last verified: (date the content was verified against the source document)

PTFE Jacket Valve Stem Seal R30-A on page 55 of SKF "切削加工シール製品ラインアップ"
Source: SKF「切削加工シール製品ラインアップ」page 55
A reduced image of the relevant page is quoted from the document. Copyright belongs to SKF.Request removal

Specifications

Operating Temperature Range -25～+200 °C
Maximum Sliding Speed 0.5 m/s
Maximum Pressure 1000 bar

ロータリーシール model comparison

Compare 25 models in the same series by specification.

Model Operating Temperature Range Maximum Sliding Speed Maximum Operating Pressure
R01-AF2 — 0.5 m/s 15 bar
R02-P 0～+80 °C 0.2 m/s —
R02-R -50～+200 °C 0.2 m/s —
R03-P -40～+100 °C 0.2 m/s 400 bar
R03-R -50～+200 °C 0.2 m/s 250 bar
R04-A -50～+110 °C 0.2 m/s 160 bar
R05-A -50～+110 °C 0.2 m/s 160 bar
R06-P -50～+110 °C 25 m/s —
R06-R -50～+200 °C 25 m/s —
R07-P -50～+110 °C 25 m/s —
R07-R -50～+200 °C 25 m/s —
R08-A -60～+200 °C — —
R08-P -50～+110 °C 2.5 m/s —
R08-R -60～+200 °C 7.5 m/s —
R09-F -20～+200 °C 0.4 m/s 350 bar
R09-FS -30～+200 °C 0.4 m/s 350 bar
R10-F -20～+200 °C 0.4 m/s 350 bar
R10-FS -30～+200 °C 0.4 m/s 350 bar
R11-F -200～+260 °C 20 m/s 5 bar
R19-F -200～+260 °C 2 m/s 150 bar
R19-FX -200～+260 °C 2 m/s 150 bar
R30-A This product -25～+200 °C 0.5 m/s —
TX -30～+150 °C 11 m/s —
TY -30～+150 °C 11 m/s —
TZ -30～+150 °C 11 m/s —

How to choose Seals

Points to check when selecting, with the values for this product (R30-A).

  1. 1. Select the inner diameter to suit the mating part and groove

    An O-ring must be selected with an inner diameter matched to the shaft diameter and groove dimensions it fits. Selecting by a nominal size compliant with standards such as JIS B 2401 makes it easier to align with groove design. Listed products cover inner diameters from 15 to 1055 mm, and there are application-specific series such as those for vacuum flanges.

  2. 2. Check cross-section diameter and squeeze

    The cross-section diameter (wire diameter) and groove depth determine whether an appropriate squeeze (compression amount) can be achieved. An incorrect fit causes leakage, extrusion or early deterioration. O-rings for vacuum flanges come in series such as 4 mm, 6 mm and 10 mm, so select by checking against the groove dimensions.

  3. 3. Select a material suited to the fluid and environment

    Material is selected based on resistance to the sealed fluid. Rubber materials differ greatly in oil resistance, weather resistance and chemical resistance depending on type, while resins such as PTFE offer excellent chemical resistance and low friction. For vacuum applications, low outgassing should also be considered. Verify against a fluid-to-material compatibility chart.

  4. 4. Confirm operation is within the service temperature range

    This product: Operating Temperature Range -25～+200 °C

    Seal materials harden and degrade at high temperatures and lose elasticity at low temperatures, reducing sealing performance. Confirm that the maximum and minimum operating temperatures fall within the service temperature range, and if the seal is continuously exposed to high temperatures, also check the continuous service temperature. Temperature ranges may differ by grade even within the same product.

  5. 5. Allow margin below the maximum pressure

    This product: Maximum Pressure 1000 bar

    If the operating pressure exceeds the maximum pressure, the seal may extrude into the gap and fail. Check that pressure, including surge pressure (momentary pressure rise), stays within the maximum pressure. Listed products include an example with a maximum pressure of 1000 bar; at high pressures, consider gap control in the groove and the use of backup rings.

  6. 6. Judge sliding applications by the limit PV value

    For dynamic seals used in reciprocating or rotating motion, wear increases sharply when the PV value, the product of pressure and speed, exceeds the limit PV value. Listed products include examples with a limit PV value of 1.5 MPa·m/s and a maximum sliding speed of 0.5 m/s. Calculate from the operating pressure and speed, and confirm that both upper limits are met.

This guide was written by AI based on the listed products' documents and specification items.

About Seals and all products

Description

Configured by combining a casing and backup ring, using SKF Ecorubber-H or SKF Ecorubber-2 as the energizer.

Features

  • Automatic preload increase
  • Low friction

Applications

  • Manufacturing equipment

FAQ

Q. What are the operating temperature range and maximum sliding speed of the R30-A?
A. The operating temperature range is -25 to +200 °C, and the maximum sliding speed is 0.5 m/s.
Q. What is the maximum pressure of the R30-A?
A. The maximum pressure is 1000 bar.
Q. What is the configuration of the R30-A, and which materials are used for the energizer?
A. It is configured by combining a casing and backup ring, and uses SKF Ecorubber-H or SKF Ecorubber-2 for the energizer.
Q. How does the automatic preload increase of the R30-A work?
A. The rubber energizer detects leakage and automatically increases the preload.
Q. What applications is the R30-A suited for?
A. It is a valve stem seal for low-friction applications, and its application is manufacturing equipment.

Written by AI based on the content of the source documents.

Source documents

Similar products (other manufacturers)

Seals products, ordered by similarity of specifications and applications.

More products from SKF

See all →