U-ring seal Type UH

staticNBREPDM

Product description
The UH profile U-ring is an elastomeric connector seal designed for sealing screw connections and screw-in sockets according to DIN EN ISO 1179-2 (imperial) and DIN EN ISO 9974-2 (metrical), formerly DIN 3869. When compressed, the profile is pressed into the groove and creates a seal between the two flat mating surfaces.

Materials

• NBR
• EPDM
• FKM

Fields of application

• static
• dynamic
• single acting
• double acting
• linear
• rotating (inactive)
• oscillating

Main use
Sealing of connection elements (screw connections and screw-in sockets)

Advantages

• Suitable for high-pressure applications (material dependent)
• Simple and fast assembly in standardized grooves
• Standardized dimensions for interchangeability

Standards and application notes
Elastomeric profile rings manufactured according to DIN EN ISO 1179-2 and DIN EN ISO 9974-2 (former DIN 3869) for sealing connecting elements and screw-in sockets. Groove dimensions according to DIN 3852 Part 11.

Technical values

• Materials available: NBR, EPDM, FKM
• NBR — Pressure: up to 63 MPa; Temperature: -30°C / +80°C (material dependent)
• EPDM — Pressure: up to 63 MPa; Temperature: -40°C / +130°C (material dependent)
• FKM — Pressure: up to 63 MPa; Temperature: -20°C / +200°C (material dependent)
• Speed: not applicable / no specification

Design information
Install the seal into a screw connection groove or screw-in socket per DIN 3852 Part 11. Process pressures up to max. 63 MPa depending on material. U-rings are not suitable for securing screws.

Assembly instructions

• Defined insertion angles; burr-free, rounded transitions
• Surface quality: Ra < 1.6 µm, Rmax < 6.3 µm
• Burr-free rounded holes and slots
• Avoid damage caused by threads
• Use installation tools to pass over sharp edges and corners (e.g. threads)
• Ensure clean sealing surfaces
• Do not overstretch the UH-ring during installation

Characteristics / Technical specifications

• Product: U-ring Type UH
• Main use: sealant for connection elements (screw connections and sockets)
• Material options: NBR, EPDM, FKM
• Maximum pressure: up to 63 MPa (material dependent)
• Temperature ranges (material dependent): NBR -30°C / +80°C; EPDM -40°C / +130°C; FKM -20°C / +200°C
• Standards: DIN EN ISO 1179-2, DIN EN ISO 9974-2 (former DIN 3869)
• Groove dimensions: according to DIN 3852 Part 11
• Note: Maximum temperature, speed and pressure values are not simultaneously applicable and depend on material and media