K02-RD Piston Seal

Specifications

K02 model comparison

Compare 4 models in the same series by specification.

How to choose Piston Seals

Points to check when selecting, with the values for this product (K02-RD).

1. 1. Match cylinder bore and groove dimensions

   The seal is designed around the combination of cylinder bore D, piston-side groove diameter d, and groove width L. If these three dimensions do not match, excess or insufficient squeeze (the amount by which the seal is compressed) causes leakage, premature wear, or improper installation. When replacing parts on existing equipment, measure the groove and check whether a matching dimensional series is available.

2. 2. Choose single-acting or double-acting by application

   Use single-acting types for cylinders pressurized on one side only, and double-acting types for double-acting cylinders pressurized in both directions. Single-acting types often have asymmetric cross-sections, and sealing fails if they are installed in the wrong orientation. Double-acting types generally have symmetric cross-sections and seal pressure in both directions with a single seal.

3. 3. Allow margin for maximum pressure

   This product: Maximum Pressure 250 bar

   The listed products have maximum pressures ranging from 25 to 1500 bar. Compare them using the maximum pressure including surge pressure (momentary pressure spikes). At high pressure, extrusion into the clearance gap is more likely, so backup-ring-integrated designs or high-pressure-rated profiles are good candidates.

4. 4. Select material by fluid and temperature

   Polyurethane-based materials offer excellent wear resistance and pressure resistance and are widely used in hydraulics. PTFE-based materials have low friction and high chemical and heat resistance, making them suitable for chemical and food applications. Rubber-based materials such as NBR are common materials for mineral oil applications. Select a material compatible with the working fluid and temperature range (listed products include examples from -60 to 260°C).

5. 5. Check sliding speed and friction characteristics

   This product: Maximum Sliding Speed 0.5 m/s

   The listed products have maximum sliding speeds of 0.3 to 15 m/s. High-speed operation and frequent reciprocating motion increase heat generation and wear. In low-speed positioning, stick-slip (vibration caused by sticking) becomes a concern, so profiles with PTFE-based slide rings, which have low breakaway resistance, are suitable.

6. 6. Consider integrating guide functions

   Profiles that incorporate guide ring functions allow a shorter piston length and reduce the number of components. However, when lateral loads are high, designs that combine a separate guide ring are common. Select the profile after reviewing the groove configuration and lateral load conditions.

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

About Piston Seals and all products

Description

Shares the same profile as the K02-PD and is designed specifically for SKF Ecorubber-based materials.

FAQ

Q. What are the operating temperature range and maximum pressure of the K02-RD piston seal?

A. The operating temperature range is -50 to +200 °C, and the maximum pressure is 250 bar.

Q. Can the K02-RD piston seal be used in high-pressure hydraulic cylinders, and what is its maximum sliding speed?

A. It is intended for high-pressure hydraulic cylinders. The maximum sliding speed is 0.5 m/s.

Q. What are the features of the K02-RD piston seal and how does it relate to the K02-PD?

A. It is a hydraulic single-acting piston seal with a trapezoidal backup ring, offering excellent chemical and heat resistance. Its profile is the same as the K02-PD, and it is designed specifically for SKF Ecorubber-based materials.

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

Source documents

• Catalog 切削加工シール製品ラインアップ 84 pages Open page 18
  Found on: https://azuma-eg.com/catalogue/