The rectangular combination seal for piston rods consists of a PTFE-filled rectangular sealing ring and a rectangular rubber ring. It is suitable for bidirectional pressure sealing in reciprocating hydraulic and pneumatic applications. The rectangular ring provides radial force and compensates for seal ring wear. For rod diameters less than 30mm, a split (open) groove design should be used.
Features:
1. Low friction, low starting resistance, smooth movement, equal dynamic and static friction, and no creep;
2. Dual-purpose seal for hydraulic and pneumatic applications, suitable for bidirectional pressure sealing;
3. Long service life, suitable for oil-free lubrication;
4. Compact design for easy installation and maintenance.
Applicable Operating Conditions (Extreme Values Should Not Appear Simultaneously)
|
Pressure Mpa |
Temperature ℃ |
Speed m/s |
Medium |
Extrusion gap Smax |
|
≤40 |
-35~+100 (matching rectangular ring NBR) |
≤4 |
Mineral-based hydraulic oil, flame retardant fluid (HFA/HFB), water, gas, etc. |
0.4 (＜25MPA) |
|
-20~+200 (matching rectangular ring FKM) |
0.2 (＜40MPA) |
Material Selection
1. Available rectangular materials: R01 nitrile rubber (NBR), RO2 fluororubber (FKM), etc.
2. Sealing ring materials: PTFE2, PTFE3, PTFE4 (see material description).
Ordering Example
Order Model SPN-d*DL-PTFE3-R01: Rod Diameter*Groove Bottom Diameter*Groove Width
SPN Model 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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