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Danfoss / Eaton Cplng 3RL Series

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Description & Features

Designed for demanding industrial environments, the Danfoss / Eaton Cplng 3RL Series is a female half quick disconnect coupling socket built around a ball lock internal connection and ring lock safety mechanism. The push-to-connect inlet pairs with a 3/4" NPTF port, and the carbon steel body with Buna-N seals supports a minimum working temperature of -40°F, making it well suited for shipyard, marine, mining, and general pneumatic applications.

Compatibility with the Hansen sub-brand and Aeroquip standards means this coupling integrates reliably into existing 3RL Series installations. No special tools are required for connection or disconnection, and the design exceeds ISO 16028 operating pressure requirements. At 1.31" wide and 1.53 lb, it is a compact, field-ready component.

SKU: 3R31A

Supplier Part Number (MPN): 3R31A

Specifications

Brand
Danfoss
Connection Size 1
3/8 in
Connection Size 2
3/4 in
Connection Type
FNPT
Connection Type 1
Female NPTF
Connection Type 2
Female NPTF
Dimensions
2.66 in L x 1.31 in W x 1.31 in H
Finish
Zinc Trivalent
Fitting Type
Female Half Coupling
Fluid Compatibility
Compressed Air
Hex Size
1.188 in
Latch Type
Push/Pull
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40 to 250 deg F
Safety Locking Mechanism
Ring Lock
Seal Material
NBR
Series
3RL Series
Thread Size
3/4-14

Product Questions & Answers (1)

Question by: Hugh H on May 27, 2025, 5:05 PM
Can this quick disconnect handle general pneumatic applications in mining?
Answer by: Customer Support on May 29, 2025, 11:55 AM
It's designed to work well in demanding industrial environments like mining, plus shipyard, marine, and general pneumatic applications.

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