CEJN Series 566 is a Flat-Face quick-connect coupling dimensionally in accordance to ISO 16028 Standard for low- and medium-pressure hydraulic applications. The Flat-Face design minimizes spillage during connection and disconnection. The stainless steel design makes it extra sturdy to fit applications in extreme environments. Series 566 couplings require only one hand for operation, making connection and disconnection fast and easy. Dust caps are available as accessories for both the coupling and nipple to prevent dust and debris from entering the system. Series 566 couplings also feature manual security locking as added protection against involuntary disconnection.

The couplings and nipples are also available in three other sizes; DN 6.3 (Series 266), DN 10 (Series 366), DN 19 (Series 766). For a steel version see Series 565. Nipples with pressure eliminator available under Series 564.

Download drawings/3dmodels

Technical data
Nominal flow diameter:	1/2" (12.5 mm)
Rated flow:	12.5 GPM (47.2 l/min)
Max. working pressure connected:	3630 PSI (250 bar)
Max. working pressure disconnected:	3630 PSI (250 bar)
Min. burst pressure connected:	14500 PSI (1000 bar)
Min. burst pressure disconnected:	14500 PSI (1000 bar)
Temperature range:	-4°F — +401°F (-20°C — +205°C)
Material coupling:	Stainless steel, AISI 316
Material nipple:	Stainless steel, AISI 316
Material seal:	Viton (FPM), other sealing materials on request
Connectability:	Without pressure
Disconnection under pressure:	Not allowed

Rated flow is measured at 14.5 PSI pressure drop.

Pressure drop chart

Pressure drop, PSI

Flow, GPM

Couplings	Part No.	Connection	Length	Diameter	Hexagon	Seal
Female thread	105661215	G 1/2"	74.8	38.2	32	FPM
	105661217	G 3/4"	76.3	38.2	33	FPM

Nipples	Part No.	Connection	Length	Diameter	Hexagon	Seal
Female thread	105666217	G 3/4"	72.9	36.7	33	FPM
	105666215	G 1/2"	71.4	35.7	32	FPM

Thread connections are listed according to ISO Standards. All measurements are in mm. Check with an authorized CEJN distributor for availability and prices.

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Series 566, DN12.5 Stainless Steel

Hydraulic Products

X66 Flat-Face Stainless Steel Couplings & Nipples

Series 566, DN12.5 Stainless Steel

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Category	Class	Connection	Article Nr	Model Files (.stp)	Drawing Files (.pdf)
Couplings	Female thread	G 1/2"	105661215
Couplings	Female thread	G 3/4"	105661217
Nipples	Female thread	G 3/4"	105666217
Nipples	Female thread	G 1/2"	105666215