Oleo Tecnica “UN” Threaded Counter Flanges with Parallel Thread and O-Ring Seat

Description

Operating Principle and Applications

Oleo Tecnica “UN” Threaded Counter Flanges with Parallel Thread and O-Ring Seat are designed to ensure leak-tight hydraulic connections within high-pressure circuits. Thanks to the parallel thread design combined with the dedicated O-ring seat, these counter flanges provide maximum protection against fluid leakage even under the most demanding operating conditions.

Construction Features and Materials

These technical components are manufactured to meet the stringent standards of the hydraulic sector. They are available in two main construction materials: S355 steel, ideal for standard industrial applications, and AISI 316L stainless steel, essential for environments requiring extremely high corrosion resistance. The nominal component sizes range from 1/2″ up to 1″1/2, covering a wide range of flow capacities. The hydraulic connection threads are UNF and UN types (from a minimum of 3/4″-16UNF up to a maximum of 1″7/8-12UN). In addition, the fastening holes can be selected with metric threads (from M8 to M16) or UNC inch threads (from 5/16″ to 5/8″), providing maximum flexibility during system assembly and maintenance.

Series 3000 and Series 6000: Pressure Specifications

The counter flanges are divided into two categories according to the maximum recommended working pressure:

• Series 3000: This series supports working pressures up to 345 Kg/cm² for 1/2″, 3/4″ and 1″ sizes. As the size increases, the maximum recommended pressure gradually decreases: for the 1″1/4 size it is 276 Kg/cm², while for the 1″1/2 size the limit is set at 207 Kg/cm².
• Series 6000: Specifically designed for very high-pressure systems, Series 6000 provides a constant maximum recommended working pressure of 414 Kg/cm² across all sizes, from the smaller 1/2″ up to the larger 1″1/2 size.

Dimensions and Overall Size Specifications

The dimensional specifications and weights of Oleo Tecnica “UN” Threaded Counter Flanges with Parallel Thread and O-Ring Seat reflect their ability to withstand mechanical stress. In Series 3000, the 1/2″ size (type GFS080T) has a maximum transverse dimension of 57 mm, with a fastening-hole centre distance of 17.48 mm. The largest model in this series (1″1/2) reaches a maximum diameter of 93 mm with a structural weight of 1.12 kg. For Series 6000, the profiles are specifically oversized. Although the 1/2″ flange retains the 57 mm overall dimension, the 1″1/2 model (type GFS405T) requires a maximum diameter of 112 mm. This top-of-the-range model, which uses larger M16 fastening holes, weighs 1.88 kg, ensuring structural integrity under a load of 414 Kg/cm².

Ordering Designation

The commercial coding system makes it possible to immediately identify the counter flange material and fastening-hole configuration:

• GFS…T: S355 steel model with metric threaded fastening holes.
• GFX…T: AISI 316L stainless steel model with metric threaded fastening holes.
• GFS…TU: S355 steel model with UNC threaded fastening holes.
• GFX…TU: AISI 316L stainless steel model with UNC threaded fastening holes.

Summary technical table of the main characteristics of Oleo Tecnica “UN” Threaded Counter Flanges with Parallel Thread and O-Ring Seat

Product Codes