Straub OPEN-FLEX 1L Pipe Coupling for 60.3mm Pipes

Description

The Straub OPEN-FLEX 1L, article number 35151, is a hinged, non-axially restraining pipe coupling designed for durability and ease of installation. It is perfectly suited for connecting pipes with an outer diameter of 60.3 mm. The openable design allows for simple installation on existing pipelines, making it an excellent choice for repairs or system extensions. The robust construction ensures a reliable seal for various applications.

Specifications

• Manufacturer: Straub
• Model: OPEN-FLEX 1L
• Article Number: 35151
• Outer Diameter: 60.3 mm / 2.4 inch
• Nominal Pressure (PN): 16 bar / 232 psi
• Test Pressure (PS): 25 bar / 363 psi
• Seal Material: EPDM
• Material Grade: W2 (Stainless Steel Casing, Coated Steel Bolts)
• Required Torque: 7.5 Nm

Label Info

• Art. Nr.: 35151
• Ser. Nr.: 081088150313
• Note: Not pull-out-resistant

Application

This coupling is ideal for use in water supply systems, industrial processing, shipbuilding, and civil engineering. Its EPDM seal is suitable for water, wastewater, air, and various chemical products. The non-pull-out-resistant design requires that the pipes are independently anchored.

Country of Origin

Made in Switzerland by Straub Werke AG.

CO2 Impact

Choosing this pre-owned coupling saves approximately 2.4 kg of CO2 compared to manufacturing a new one. This is equivalent to the emissions from driving a standard car for 12 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?

What does 'not pull-out-resistant' mean for this coupling?

This means the coupling does not provide axial restraint. It seals the pipe connection but will not prevent the pipes from pulling apart under pressure or movement. The pipeline must be securely anchored and supported to prevent axial separation.

What types of pipes is the STRAUB-OPEN-FLEX 1L suitable for?

It is suitable for all types of metal and plastic pipes, including steel, stainless steel, cast iron, copper, PVC, and PE, as long as the outer diameter matches the coupling's specification (60.3 mm).

What is the recommended bolt torque for the Art. Nr. 35151?

The label clearly indicates a required tightening torque of 7.5 Nm (5.5 lbf.ft). It is crucial to use a torque wrench to ensure a proper and safe seal without over-tightening.

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Friday, March 13, 2026