Oleo Tecnica Double CETOP Flanges with Butt-Weld Stub and Counter Stub and Metric Screw Set

Description

Operating Principle and Applications

Oleo Tecnica Double CETOP Flanges with Butt-Weld Stub and Counter Stub and Metric Screw Set are designed to ensure rigid, leak-free connections within industrial hydraulic circuits. The coupling between the stub with O-ring seat and the smooth counter stub, clamped by the two CETOP flanges and the supplied metric screw set, ensures optimal leak-tight sealing. The maximum recommended working pressure of the system depends directly on the thickness and quality of the steel pipe used for butt welding, while the flange itself defines the nominal limit of the series, available for working pressures of 250 Bar or 400 Bar.

Construction Features and Materials

The structure of these components is based on the use of materials suitable for withstanding severe mechanical stresses and pressure variations. The two CETOP flanges are manufactured from S355 steel, an alloy characterized by a high yield strength. The weld stubs, both the version with O-ring seat and the version without seat, are manufactured from S355/A105 steel or alloys with similar mechanical properties. For applications in corrosive environments, the entire supply, including the CETOP flanges and stubs, is available on request in AISI316L stainless steel, providing superior resistance to oxidation and chemical attack from fluids.

Kit Composition and Supply Standard

The system is supplied as a complete mounting package, identified by the ordering designation DCET…ST… (or DCETX…ST… for stainless steel configurations). Each standard set includes exactly:

• 2 CETOP Flanges in S355 material (or AISI316L on request).
• 1 Butt-weld stub with O-ring seat (in A105 or AISI316L).
• 1 Butt-weld counter stub without O-ring seat (in A105 or AISI316L).
• 4 Metric socket head cap screws (TCE).
• 8 Grower washers to prevent dynamic loosening caused by vibration.
• 4 Nuts for structural fastening.
• 1 O-ring seal for primary hydraulic sealing.

Sizing and Pressure Variants

The flanges are classified into two main categories according to the maximum recommended working pressure: Series 250 and Series 400. The available sizes cover a wide range of nominal diameters, from 3/8″ connections up to 4″ pipes. Each size features precisely calculated dimensions to ensure accurate coupling. The diameter of the fastening screws progressively ranges from M6x45 for compact models up to M24x160 for the largest sizes, ensuring a mechanical preload proportional to the internal hydraulic thrust of the circuit.

Technical Summary Table of the Main Characteristics of Oleo Tecnica Double CETOP Flanges with Butt-Weld Stub and Counter Stub and Metric Screw Set.

Product Codes