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

Description

Oleo Tecnica “UN” Threaded Flanges with Parallel Thread and O-Ring Seat are hydraulic components designed to ensure highly reliable, leak-tight connections in circuits operating under high pressure. The O-ring seat provides effective fluid sealing, preventing leakage even under mechanical stress, while the “UN” (Unified National) parallel thread ensures precise mechanical coupling. The range covers sizes from 1/2″ up to 1″1/2, accommodating different diameters and flow capacities to suit multiple system architectures.

Performance and Pressure Limits by Series

This component family is divided into two main categories according to pressure resistance, identified as Series 3000 and Series 6000. Maximum recommended working pressures vary according to the series and the nominal flange size:

• Series 3000: Designed for medium and medium-high pressures. For 1/2″, 3/4″ and 1″ sizes, the maximum recommended working pressure is 345 kg/cm². For the 1″1/4 size, it decreases to 276 kg/cm², while for the 1″1/2 size the limit is 207 kg/cm².
• Series 6000: Intended for high-pressure heavy-duty applications. For all sizes available in this series (from 1/2″ up to 1″1/2), the flange maintains a uniform and constant maximum recommended working pressure of 414 kg/cm².

Construction Features and Materials

To meet different environmental and chemical requirements, the flanges are manufactured in two primary material options. S355 carbon steel can be selected for standard industrial applications, while AISI 316L stainless steel is available for corrosive environments or specific fluid requirements. The sealing system uses specific O-rings for each size, with coded types (e.g. 4075, 4100, 4131, 4150, 4187). As regards fastening, UNC screw sets are available only for carbon steel versions.

Ordering Designation and Supply Configurations

Product flexibility is reflected in the clear ordering designation structure, which makes it possible to identify both the material and the composition of the supply kit. The letter “S” (e.g. AFS) indicates carbon steel, while “X” (e.g. AFX) identifies stainless steel. The suffixes determine the package configuration:

• …T: Flange only.
• …TM: Flange complete with metric screws, spring washers and O-ring. Metric screws range from M8x30 to M16x55 depending on the model.
• …TU: Flange complete with UNC screws, spring washers and O-ring. UNC screws range from 5/16″x1″1/4 to 5/8″x2″1/4.

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

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