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Air Products Company is a leading distributor, serving this industry for the last 72 years, specializing in the sales and service of the Danfoss Hansen quick disconnect couplings, Graco pumps, sprayers, industrial fluid handling, and Fastest Inc line of leak detection equipment and fittings.

Hansen MLFF Series
Stainless Steel Flat Face Couplings

Danfoss Hansen MLFF Series stainless steel coupling is a flat face dry break coupling used for hydraulic applications where ISO 16028 interchange, corrosion resistance, and cleaner connection points are important.

Series Overview

Stainless steel flat face couplings for aggressive environments

The MLFF Series interchanges with all ISO 16028 profiles and, due to its stainless steel design, is corrosion resistant and able to handle aggressive environments. It is the Danfoss Hansen flat face option for hydraulic applications where dry break performance and stainless construction are both important.

Product Features

316L Stainless Steel Construction

Standard body material is 316L stainless steel for corrosion resistance, with valve material listed as F15NM for aggressive service conditions.

ISO 16028 Interchange

The MLFF Series interchanges with all ISO 16028 profiles used in flat face hydraulic quick disconnect service.

Safety and Connection Control

Safety sleeve lock helps prevent accidental disconnection, while push-to-connect double shut-off valving supports cleaner dry break connection cycles.

Physical Characteristics

MLFF Series physical characteristics

ISO Size*	Coupling Size	Maximum Operating Pressure						Minimum Burst Pressure						Rated Flow**		Fluid Loss ml-cc.	Air Inclusion ml-cc.	Force to Connect
ISO Size*	Coupling Size	Connected bar	Connected psi	Plug/Male bar	Plug/Male psi	Socket/Female bar	Socket/Female psi	Connected bar	Connected psi	Plug/Male bar	Plug/Male psi	Socket/Female bar	Socket/Female psi	lpm	gpm	Fluid Loss ml-cc.	Air Inclusion ml-cc.	N	Lbs
6.3	1/4	250	3,625	250	3,625	250	3,625	2,335	33,858	1,640	23,780	1,330	19,285	17	4.49	0.004	0.007	80	18.0
10	3/8	250	3,625	250	3,625	250	3,625	1,672	24,244	1,664	24,128	845	12,253	29	7.66	0.006	0.010	140	31.5
12.5	1/2	250	3,625	250	3,625	250	3,625	1,679	24,346	997	14,457	993	14,399	55	14.53	0.012	0.013	195	43.8
16	5/8	250	3,625	250	3,625	250	3,625	1,190	17,255	950	13,775	880	12,760	67	17.70	0.016	0.030	205	46.1
19	3/4	250	3,625	250	3,625	250	3,625	1,370	19,865	882	12,789	845	12,253	105	27.74	0.034	0.015	215	48.3
25	1	250	3,625	250	3,625	250	3,625	1,000	14,500	1,000	14,500	850	12,325	177	46.76	-	-	-	-
40	1-1/2	250	3,625	250	3,625	250	3,625	-	-	750	10,875	-	-	450	118.90	-	-	-	-
50	2	175	2,535	175	2,535	175	2,535	-	-	525	7,610	-	-	700	184.90	-	-	-	-

Applications

Common applications

Hydraulic applications requiring flat face dry break couplings
Marine and offshore systems
Corrosion-sensitive or aggressive environments
Washdown-oriented equipment where stainless construction is preferred
General hydraulic quick disconnect duty with ISO 16028 interchange

Flow Data

MLFF Series flow data

MLFF part number tables

Socket/Female

NBR	FKM	EPDM	Body Size	ISO Size	Nominal Flow Dia.	Thread Size	Thread Type	Fig.	A	B	C	Hex
ML6FFS25	ML6FFS25143	-	1/4	6.3	6 mm	1/4-18f	NPT	1	2.13 / 54	1.06 / 27	0.94 / 24	0.87 / 22
ML10FFS37	ML10FFS37143	ML10FFS37192	3/8	10	8.6 mm	3/8-18f	NPT	1	2.67 / 67.8	1.26 / 32	1.16 / 29.5	1.06 / 27
ML12FFS50	ML12FFS50143	-	1/2	12.5	11 mm	1/2-14f	NPT	1	3.03 / 77	1.50 / 38.2	1.56 / 39.5	1.42 / 36
ML19FFS75	ML19FFS75143	-	3/4	19	15 mm	3/4-14f	NPT	1	3.80 / 96.6	1.82 / 46.2	1.81 / 46	1.65 / 42
-	ML19FFS75BS143	-	3/4	19	15 mm	3/4-14	BSPP	1	3.80 / 96.6	1.82 / 46.2	1.81 / 46	1.65 / 42
ML19FFS100	ML19FFS100143	-	1	19	15 mm	1-11.5f	NPT	1	3.80 / 96.6	1.82 / 46.2	1.81 / 46	1.65 / 42
-	ML25FFS125143	-	1-1/4	25	18 mm	1-1/4-11.5f	NPT	1	4.07 / 103.5	2.17 / 55.2	2.36 / 60	2.17 / 55
-	ML40FFS150143	-	1-1/2	40	30.1 mm	1-1/2-11.5f	NPT	1	5.01 / 127.4	3.13 / 79.5	2.76 / 70	2.56 / 65
-	ML50FFS200143	-	2	50	39.2 mm	2-11.5f	NPT	1	6.17 / 156.8	3.84 / 97.5	3.46 / 87.8	3.15 / 80

Plug/Male

NBR	FKM	EPDM	Body Size	ISO Size	Nominal Flow Dia.	Thread Size	Thread Type	Fig.	D	E	F	G	Hex
ML6FFP25	-	-	1/4	6.3	6 mm	1/4-18f	NPT	3	2.01 / 51	0.64 / 16.2	0.94 / 24	1.58 / 40.1	0.87 / 22
ML10FFP37	ML10FFP37143	ML10FFP37192	3/8	10	8.6 mm	3/8-18f	NPT	3	2.56 / 65	0.78 / 19.7	1.16 / 29.5	1.96 / 49.7	1.06 / 27
ML12FFP50	ML12FFP50143	-	1/2	12.5	11 mm	1/2-14f	NPT	3	2.71 / 69	0.96 / 24.5	1.56 / 39.5	2.05 / 52	1.42 / 36
ML19FFP75	ML19FFP75143	-	3/4	19	15 mm	3/4-14f	NPT	3	3.69 / 93.8	1.18 / 29.9	1.81 / 46	2.84 / 72	1.65 / 42
-	ML19FFP75BS143	-	3/4	19	15 mm	3/4-14	BSPP	3	3.69 / 93.8	1.18 / 29.9	1.81 / 46	2.84 / 72	1.65 / 42
ML19FFP100	ML19FFP100143	-	1	19	15 mm	1-11.5f	NPT	3	3.69 / 93.8	1.18 / 29.9	1.81 / 46	2.84 / 72	1.65 / 42
ML25FFP125	ML25FFP125143	-	1-1/4	25	18 mm	1-1/4-11.5f	NPT	3	4.12 / 104.6	1.42 / 36	2.36 / 60	3.22 / 81.7	2.17 / 55
-	ML40FFP150143	-	1-1/2	40	30.1 mm	1-1/2-11.5f	NPT	3	4.13 / 105	2.24 / 57	2.61 / 66.3	3.01 / 76.5	2.36 / 60
-	ML50FFP200143	-	2	50	39.2 mm	2-11.5f	NPT	3	5.31 / 135	2.87 / 73	3.29 / 83.5	3.80 / 96.6	2.95 / 75

Color-Coded Rings

Socket/Female Ring**

Body Size	Green	Blue	Red	Yellow
10FF	CR10FFSDG	CR10FFSLB	CR10FFSRD	CR10FFSYL
12FF	CR12FFSDG	CR12FFSLB	CR12FFSRD	CR12FFSYL
16FF	CR16FFSDG	CR16FFSLB	CR16FFSRD	-
19FF	CR19FFSDG	CR19FFSLB	CR19FFSRD	CR19FFSYL

** Orders must be in multiples of 10 pcs.

Plug/Male Ring**

Body Size	Green	Blue	Red	Yellow
10FF	CR10FFPDG	CR10FFPLB	CR10FFPRD	CR10FFPYL
12FF	CR12FFPDG	CR12FFPLB	CR12FFPRD	CR12FFPYL
16FF	CR16FFPDG	CR16FFPLB	CR16FFPRD	-
19FF	CR19FFPDG	CR19FFPLB	CR19FFPRD	CR19FFPYL