Two metal circular industrial connectors: a knurled, female receptacle on the left with visible pins, and a male plug on the right, shown as a two-piece connector.
Nominal Diameter 25mm

551 Series | Safety Lock Double Shut Off ISO 7241-1 Quick Release Couplings & Plugs

551 Series conforms to ISO 7241-1 A SERIES, steel double shut-off design, for hydraulic applications.

Related Series

Single Shut Off CouplingsSingle Shut Off CouplingsVersion not available
Double Shut Off CouplingsDouble Shut Off CouplingsThis Series (551)
Straight Through CouplingsStraight Through CouplingsVersion not available
Safety CouplingsSafety CouplingsVersion not available
Technical side view of a stepped cylindrical component with a top cap; diameters Ø34.3, Ø33, Ø36.5 and overall height 36.6, base labeled 551.

Female Thread BSPP Coupling

Part Number Termination Length Diameter
551CDFP01SNP 1" 104mm 54mm

Female Thread BSPP Plug

Part Number Termination Length Diameter
551PDFP01SNP 1" 71mm 34mm

Coupling Cap

Part Number
551CC01

Plug Cap

Part Number
551PC01

Advantages

  • Twin handed operation.
  • ISO-A

Technical Specifications

Coupling Specifications
Materials
Performance

Working Limits

Working Temperature

-30°C to +100°C (NBR)

Working Pressure

230 Bar (safety factor 4:1)

Maximum static working pressure with safety factor 4:1

Interchangeability

Interchangeable With:

No interchangeables listed.

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