Hydraulic Quick-Connect Couplings

Product Specifications

Technical details and manufacturing context for Hydraulic quick-connect couplings

Definition

Hydraulic quick-connect couplings are specialized components used in hydraulic systems to provide fast, secure, and leak-free connections between hoses, pipes, or equipment. They are designed for applications where frequent coupling and uncoupling is required, such as in mobile machinery, industrial equipment, and maintenance operations. These couplings consist of a plug (male) and a socket (female) with internal mechanisms like ball bearings, sleeves, or locking collars that engage to form a sealed joint. Connection is typically achieved with a push-to-connect or twist-lock action, while disconnection is done by manually releasing the locking mechanism, allowing quick separation without tools. This minimizes downtime and fluid loss during maintenance or tool changes. The couplings are available in various materials, including stainless steel, carbon steel, and brass, to suit different environmental and fluid compatibility requirements. Key parameters include nominal size (6–50 mm per ISO 7241-1), operating pressure (1.0–1.6 MPa), burst pressure (40–63 MPa), flow rate (20–200 L/min at nominal size and 0.1 MPa pressure drop), leakage rate (≤0.1 mL/min per ISO 7241-2), temperature range (-20 to 100°C), connection type (NPT 1/8–1/2 per ASME B1.20.1), material (stainless steel 316 per ASTM A276), seal material (NBR per ASTM D2000), weight (0.1–2.5 kg), and connection cycles (10,000–50,000). These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. Standards listed are for procurement and verification reference only, not certification. Always confirm model-specific values and standards before use.

Working Principle

The coupling operates by aligning the plug and socket, then pushing or twisting to engage internal locking mechanisms such as ball bearings or a locking collar. This action compresses seals to create a leak-free joint. Disconnection involves releasing the locking mechanism, often by pulling back a sleeve, which allows the plug to be withdrawn. The design ensures rapid connection and disconnection without tools, reducing fluid loss and downtime.

Common Materials

Stainless steel, Carbon steel, Brass

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Size	6–50 mm	Determines flow capacity and mating compatibility.ISO 7241-1
Burst Pressure	40–63 MPa	Safety margin above operating pressure.
Flow Rate	20–200 L/min	At nominal size and 0.1 MPa pressure drop.
Leakage Rate	≤0.1 mL/min	At rated pressure with sleeve locked.ISO 7241-2
Temperature Range	-20–100 °C	Seal material dependent; outside range may cause leakage.
Connection Type	NPT 1/8–1/2 inch	Thread size range for port connections.ASME B1.20.1
Material	316 SS	Corrosion resistance for hydraulic fluids.ASTM A276
Seal Material	NBR	Compatible with mineral oils; FKM for higher temps.ASTM D2000
Weight	0.1–2.5 kg	Depends on size and material.
Connection Cycles	10000–50000 cycles	Under normal operating conditions.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Locking Sleeve Part
Engages and disengages the coupling mechanism for connection/disconnection.

Material: Steel
Seal Part
Prevents fluid leakage at the connection point.

Material: Nitrile rubber
Body Part
Main structural component housing internal mechanisms.

Material: Stainless steel
Ball Bearings Optional
Drop into the plug groove to hold the joint on ball-lock couplings.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Hydraulic quick-connect couplings.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Attachment interface

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Manufacturers of Hydraulic quick-connect couplings

Manufacturer profiles associated with Hydraulic quick-connect couplings.

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Frequently Asked Questions

What are the typical materials used for hydraulic quick-connect couplings?

Common materials include stainless steel, carbon steel, and brass. The choice depends on the application's environmental conditions and fluid compatibility. Stainless steel (e.g., 316) offers high corrosion resistance, while brass is suitable for lower-pressure applications.

How do I select the correct nominal size for my hydraulic system?

Nominal size determines flow capacity and mating compatibility. It should match the hose or pipe size in your system. Refer to the manufacturer's specifications and standards like ISO 7241-1 to ensure proper fit and performance.

What is the maximum operating pressure for these couplings?

The operating pressure range is 1.0–1.6 MPa. However, this is a reference range; the actual maximum pressure depends on the specific model and material. Always verify with the manufacturer for your application.

Can these couplings be used with high-temperature fluids?

The standard temperature range is -20 to 100°C, but this depends on the seal material. NBR seals are suitable for mineral oils within this range, while FKM seals may be required for higher temperatures. Confirm the seal material and temperature limits with the supplier.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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pressure:	Up to 10,000 psi (690 bar)
flow rate:	Up to 200 GPM (757 L/min)
temperature:	-40°C to 120°C
slurry concentration:	Not recommended for slurries >5% solids by volume

Product Specifications

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