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M3N

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Item	Part no. toDIN 24250	Description
1.1	472	Seal face
1.2	412.1	O-Ring
1.3	474	Thrust ring
1.4	478	Righthand spring
1.4	479	Lefthand spring
2	475	Seat (G9)
3	412.2	O-Ring

M3N

PDF data sheet

Features

For plain shafts
Single seal
Unbalanced
Rotating conical spring
Dependent on direction of rotation

Advantages

Universal application opportunities
Insensitive to low solids content
No damage of the shaft by set screws
Large choice of materials
Short installation lengths possible (G16)
Variants with shrink-fitted seal face available

Operating range

Shaft diameter:
d1 = 6 ... 80 mm (0,24" ... 3,15")
Pressure: p1 = 10 bar (145 PSI)
Temperature:
t = -20 °C ... +140 °C (-4 °F ... +284 °F)
Sliding velocity: vg = 15 m/s (50 ft/s)
Axial movement: ±1.0 mm

Materials

Seal face: Special cast CrMo steel (S)
Seat G9: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B)

Standards and approvals

EN 12756

Recommended applications

Low solids content media
Chemical industry
Pulp and paper industry
Water and waste water technology
Building services industry
Food and beverage industry
Sugar industry
Water and sewage water pumps
Submersible pumps
Chemical standard pumps
Eccentric screw pumps
Cooling water pumps
Basic sterile applications

Product variants

M3
Items and description as M3N.
Seal face: Special cast CrMo steel (S)
Seat G13: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B)

https://media-assets.eagleburgmann.com/image/108134910297/image_oarcqosr997ur9bfbn0dua250e/-FWEBP

M32
Items and descriptions as for type M3N, but with carbon graphite seal face shrink-fitted to the seal face carrier (Item no. 1.1).
Seal face: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B)
Seat G4: special cast CrMo steel (S), Silicon carbide (Q1, Q2)
Seat G6 (M32N4): Special cast CrMo steel (S), Silicon carbide (Q1, Q2)
Seat G9 (M32N): Silicon carbide (Q1, Q2)
Seat G6 also available in A, B = G30 (longer installation length than G6)

https://media-assets.eagleburgmann.com/image/108134910297/image_oa4ju54sd9787er126q2sruj13/-FWEBP

M37G
Items and descriptions as for type M3N, but with shrink fitted silicon carbide seal face to the seal face carrier (Item no. 1.1).
Shaft diameter:
d1 = 16 ... 80 mm (0.63" ... 3.15")
Temperature:
t = –20 °C ... +180 °C (–4 °F ... +355 °F)
Sliding velocity: vg = 10 m/s (33 ft/s)

Seal face: Silicon carbide (Q12, Q22), Tungsten carbide (U22)
Seat G4: Silicon carbide (Q1, Q2)
Seat G13: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B)
Seat G6 (M37GN4): Silicon carbide (Q1, Q2)
Seat G9 (M37GN): Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (Q1, Q2)
Seat G6 also available in A, B = G30 (longer installation length than G6)

Similar products

AX25

External configuration
Balanced
Independent of direction of rotation
Independent of pressure direction

AX40K

Stationary springs
Balanced
Independent of direction of rotation
Independent of pressure direction

BT-C5E

Single seal
For plain shafts
Unbalanced
Multiple springs, rotating
Independent of direction of rotation

Back to overview

d₁	d₃	d₆	d₇	d₈	d₁₁1)	d₁₂1)	d₁₃	d_b	l_1N	l₃3)	l₅	l₆	l₇	l₈	l₉	l₁₀	l₁₁	l₁₂	l₁₃	l₁₄	l₁₅	l₁₆	l₁₈	l₁₉	l₂₁3)	l₂₂	l₂₃	l₂₈	b2)	R
6	14	–	–	–	11.5	16.0	16	8	–	–	–	–	–	–	–	–	9.0	6.5	7.1	5.6	1.2	3.8	–	–	10.5	11.9	–	–	–	1.2
8	18	–	–	–	15.5	19.2	18	11	–	–	–	–	–	–	–	–	9.0	8.0	7.1	7.0	1.2	3.8	–	–	15.5	16.9	–	–	–	1.2
10*	19	17	21	3	15.5	19.2	20	13	40	15.5	1.5	4	8.5	17.5	10.0	7.5	9.0	7.5	7.1	6.6	1.2	3.8	–	–	15.5	16.9	–	6.6	(8)	1.2
12*	21	19	23	3	17.5	21.6	22	16	40	16.0	1.5	4	8.5	17.5	10.0	7.5	10.0	6.5	7.6	5.6	1.2	3.8	–	–	15.5	17.4	–	6.6	(8)	1.2
14*	23	21	25	3	20.5	24.6	24	18	40	16.5	1.5	4	8.5	17.5	10.0	7.5	10.0	6.5	7.6	5.6	1.2	3.8	–	–	15.5	17.4	16.5	6.6	(8)	1.2
15	24	–	–	–	20.5	24.6	25	19	–	–	–	–	–	–	–	–	11.0	7.5	8.6	6.6	1.2	3.8	–	–	15.5	17.4	–	–	–	1.2
16*	26	23	27	3	22.0	28.0	26	21	40	18.0	1.5	4	8.5	17.5	10.0	7.5	11.5	8.5	9.0	7.5	1.5	5.0	–	–	17.5	19.5	16.5	6.6	(8)	1.5
18*	29	27	33	3	24.0	30.0	31	23	45	19.5	2.0	5	9.0	19.5	11.5	8.5	12.5	9.0	10.0	8.0	1.5	5.0	15	7.0	18.5	20.5	18.0	7.5	(8)	1.5
20*	31	29	35	3	29.5	35.0	34	26	45	22.0	2.0	5	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15	7.0	20.0	22.0	19.0	7.5	(8)	1.5
22*	33	31	37	3	29.5	35.0	36	28	45	21.5	2.0	5	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15	7.0	21.5	23.5	20.5	7.5	(8)	1.5
24*	35	33	39	3	32.0	38.0	38	30	50	23.5	2.0	5	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15	7.0	23.0	25.0	22.0	7.5	(8)	1.5
25*	36	34	40	3	32.0	38.0	39	31	50	26.5	2.0	5	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15	7.0	24.5	26.5	23.5	7.5	(8)	1.5
26	37	–	–	–	34.0	40.0	40	32	–	–	–	–	9.0	–	–	–	13.0	9.0	10.0	8.0	1.5	5.0	–	–	24.5	26.5	23.5	–	–	1.5
28*	40	37	43	3	36.0	42.0	42	35	50	26.5	2.0	5	9.0	19.5	11.5	8.5	14.0	10.0	11.0	9.0	1.5	5.0	15	7.0	24.5	26.5	24.5	7.5	(8)	1.5
30*	43	39	45	3	39.2	45.0	44	37	50	26.5	2.0	5	9.0	19.5	11.5	8.5	14.0	11.5	11.0	10.5	1.5	5.0	15	7.0	24.5	25.0	24.5	7.5	(8)	1.5
32*	46	42	48	3	42.2	48.0	46	39	55	28.5	2.0	5	9.0	19.5	11.5	8.5	14.0	11.5	11.0	10.5	1.5	5.0	15	7.0	28.0	28.5	28.0	7.5	(8)	1.5
33*	47	42	48	3	–	–	47	40	55	28.5	2.0	5	9.0	19.5	11.5	8.5	–	12.0	–	–	–	–	15	7.0	–	–	–	7.5	(8)	1.5
35*	49	44	50	3	46.2	52.0	49	43	55	28.5	2.0	5	9.0	19.5	11.5	8.5	14.5	12.0	11.5	11.0	1.5	5.0	15	7.0	28.0	28.5	28.0	7.5	(8)	1.5
38*	53	49	56	4	49.2	55.0	54	45	55	33.5	2.0	6	9.0	22.0	14.0	10.0	14.5	11.3	11.5	10.3	1.5	5.0	16	8.0	31.0	32.2	31.0	9.0	7,5	1.5
40*	56	51	58	4	52.2	58.0	56	49	55	36.0	2.0	6	9.0	22.0	14.0	10.0	14.5	11.8	11.5	10.8	1.5	5.0	16	8.0	34.0	34.7	34.0	9.0	(8)	1.5
42	59	–	–	–	53.3	62.0	58	52	–	–	–	–	9.0	–	–	–	17.0	13.2	14.3	12.0	2.0	6.0	–	–	35.0	37.3	35.0	–	–	2.5
43*	59	54	61	4	–	–	59	52	60	38.5	2.0	6	9.0	22.0	14.0	10.0	–	13.2	–	–	2.0	–	16	8.0	–	–	–	9.0	7,5	2.5
45*	61	56	63	4	55.3	64.0	61	55	60	39.5	2.0	6	9.0	22.0	14.0	10.0	17.0	12.8	14.3	11.6	2.0	6.0	16	8.0	36.5	39.2	36.5	9.0	(8)	2.5
48*	64	59	66	4	59.7	68.4	64	58	60	46.0	2.0	6	9.0	22.0	14.0	10.0	17.0	12.8	14.3	11.6	2.0	6.0	16	8.0	42.0	44.7	42.0	9.0	(8)	2.5
50*	66	62	70	4	60.8	69.3	66	61	60	45.0	2.5	6	9.0	23.0	15.0	10.5	17.0	12.8	14.3	11.6	2.0	6.0	17	9.5	43.0	45.7	43.0	9.5	(8)	2.5
53*	69	65	73	4	–	–	69	64	70	47.0	2.5	6	9.0	23.0	15.0	12.0	–	13.5	–	–	–	–	17	9.5	–	–	–	11.0	8,0	2.5
55*	71	67	75	4	66.5	75.4	71	66	70	49.0	2.5	6	9.0	23.0	15.0	12.0	18.0	14.5	15.3	13.3	2.0	6.0	17	9.5	47.0	49.0	47.0	11.0	(8)	2.5
58*	76	70	78	4	69.5	78.4	78	69	70	55.0	2.5	6	9.0	23.0	15.0	12.0	18.0	14.5	15.3	13.3	2.0	6.0	18	10.5	50.0	52.0	50.0	11.0	(8)	2.5
60*	78	72	80	4	71.5	80.4	79	71	70	55.0	2.5	6	9.0	23.0	15.0	12.0	18.0	14.5	15.3	13.3	2.0	6.0	18	10.5	51.0	53.0	51.0	11.0	(8)	2.5
63*	83	75	83	4	–	–	83	74	70	55.0	2.5	6	9.0	23.0	15.0	12.0	–	14.2	–	–	–	–	18	10.5	–	–	–	11.0	(8)	2.5
65*	84	77	85	4	76.5	85.4	85	77	80	55.0	2.5	6	9.0	23.0	15.0	12.0	18.0	14.2	15.3	13.0	2.0	6.0	18	10.5	52.0	54.3	52.0	11.0	(8)	2.5
68*	88	81	90	4	82.7	91.5	88	80	80	55.0	2.5	7	9.0	26.0	18.0	12.5	19.0	14.9	16.0	13.7	2.0	6.0	18,5	11.0	53.0	55.3	52.7	11.3	(8)	2.5
70*	90	83	92	4	83.0	92.0	90	83	80	57.0	2.5	7	9.0	26.0	18.0	12.5	18.0	14.2	15.3	13.0	2.0	6.0	19	11.5	54.0	56.3	54.0	11.3	(10)	2.5
75*	98	88	97	4	90.2	99.0	98	88	80	62.0	2.5	7	9.0	26.0	18.0	12.5	18.0	15.2	15.3	14.0	2.0	6.0	19	11.5	55.0	56.3	54.0	11.3	(10)	2.5
80*	100	95	105	4	95.2	104.0	103	93	90	61.8	3.0	7	9.0	26.2	18.2	13.0	19.0	16.2	16.3	15.0	2.0	6.0	19	11.5	58.0	59.3	58.0	12.0	10.0	2.5

Dimensions in millimeter 1) Fitting dimensions d~11~ and d~12~ only apply to type M37G with d~1~ 16 mm 2) Dimensions in brackets lie either above or below l~1N~ 3) l~3~ valid for M3...N, l~21~ valid for M3 *) According to EN 12756