Heavy-duty piston rod step seals (Step Seals) consist of a PTFE-filled stepped seal ring and a rectangular rubber ring. They are suitable for unidirectional pressure sealing in reciprocating hydraulic applications. The rectangular ring provides radial force and compensates for seal ring wear. They are generally used in conjunction with a guide ring. Split (open) grooves should be used for rod diameters less than 30mm. They are commonly used in heavy-duty hydraulic equipment.
Features:
1. Low friction, low starting resistance, smooth movement, equal dynamic and static friction, and no creep;
2. High pressure stability under pressure and harsh conditions;
3. Long service life, suitable for oil-free seals;
4. Suitable for sealing low-viscosity media such as water.
Applicable Operating Conditions (Extreme Values Should Not Appear Simultaneously)
|
Pressure Mpa |
Temperature ℃ |
Speed m/s |
Medium |
|
≤60 |
-35~+100 (matching O-ring NBR) |
≤6 |
Mineral-based hydraulic oil, flame retardant fluid (HFA/HFB), water, etc. |
|
-20~+200 (matching O-ring FKM) |
Material Selection
1. Available rectangular ring materials: R01 nitrile rubber (NBR), R02 fluororubber (FKM), etc.
2. Sealing ring materials: PTFE2, PTFE3, PTFE4, PU, etc. (See Material Description).
Ordering Example
Order Model: RC12 - 40 x 55 x 7.5 mm - PTFE3 - RO1 Model - Rod Diameter x Groove Diameter x Groove Width; PTFE3 - Modified PTFE Material Code; R01 - Rectangular Ring Material Code
Address
No.1 Ruichen Road, Dongliuting Industrial Park, Chengyang District, Qingdao City, Shandong Province, China
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