URD Series U-Cup Seal | High-Pressure & Anti-Extrusion Rod Seal
Polypac’s URD Series U-Cup Seal offers heavy-duty, high-pressure performance with superior anti-extrusion protection. Crafted from durable urethane, this rod seal ensures long-lasting reliability in demanding applications. Ideal for efficient sealing in hydraulic systems.
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Details
1. Application and properties:
Suitable for one-way reciprocating rod seal. and has excellent dynamic and static sealing performance at high,
medium and low pressure.
The sealing surface has two lips, and the sealing medium between the two lips is used as a lubricant, which avoids
dry friction and wear to a certain extent, and the friction coefficient is greatly reduced compared with the sealing parts
of the same type of single lip, and the life is prolonged. The double mouth structure prevents the entry of outside air,
reduces the gas in the working medium, and increases the sealing capacity at low pressure.
It is suitable for a wide range of working pressures and can be used independently at medium to low pressures.
The pressure resistance can also be enhanced by adding retaining rings. At higher pressures, it can be used in
combination with a buffer seal. By adding a buffer seal in front of this seal and installing a back-up ring at the base of
this seal, the sealing system can withstand pressures up to 35MPa.
Operating temperature range from -30°C to +110°C.
The installation groove meets the requirements of ISO5597/1 international standard. Non-standard sizes are also
available. Closed groove, easy installation of seals.
Strong residual oil retraction ability under reciprocating motion, with minimal residual oil on the rod.
2. Standard Material
NBR/TPU
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