Burgmann MG1 MG12 MG13 MG1S20

The Burgmann MG1, MG12 and MG13 are robust, high-quality elastomer bellows mechanical seals designed for a wide range of industrial applications. These unbalanced single seals feature a rotating bellows design that is independent of the direction of rotation. The special bellows design protects the seal faces during installation and provides a large axial movement capability to accommodate shaft deflections.

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We build most Burgmann seals, not only the MG series. Send the seal part number, a drawing or the old seal. All are equivalents, not sold as genuine OEM parts.

MG-type elastomer bellows seal with seat

Operating limits

Temperature-20°C to 120°C (-4°F to 248°F)

PressureVacuum to 1.2 MPa (174 psi)

Speed≤10 m/s (32.8 ft/s)

Drawing & dimensions

Mechanical seal Chart

Dimensions in mm by shaft diameter d1. Letters match the section drawing. Standard sizes shown; other sizes are built from a drawing or the old seal.

d1	d3	d7	d8	d7-1	l3	l2	l1	l4	l5	l6	l7	l8
10	22	21	19.2	24.6	6.5	6.5	9	10	14.7	25.5	26	33.5
12	24.5	23	21.6	27.8	6.5	6.5	9	10	14.7	25.5	26	33.5
14	24.5	23	21.6	27.8	6.5	6.5	9	10	14.7	25.5	28.5	33.5
16	28	27	24.6	30.9	6.5	6.5	10.5	10	17.2	25.5	28.5	33.5
18	28	27	24.6	30.9	7.5	7.5	10.5	10	17.2	25.5	30.1	37.7
20	31.5	30	34.15	34.15	7.5	7.5	10.5	11.4	21.7	25.5	30.1	37.7
22	31.5	30	34.15	34.15	7.5	7.5	10.5	11.4	21.7	25.5	32.7	42.7
24	34.5	33	40.5	40.5	7.5	7.5	10.5	11.4	21.7	25.5	32.7	42.7
26	34.5	33	40.5	40.5	7.5	7.5	10.5	11.4	21.7	25.5	32.7	42.7
28	37.5	36	46.5	46.5	7.5	7.5	10.5	11.4	21.7	25.5	35.2	42.7
30	37.5	36	46.5	46.5	7.5	7.5	10.5	11.4	21.7	25.5	35.2	42.7
32	40.5	39	48.4	48.4	7.5	7.5	10.5	11.4	21.7	25.5	35.2	42.7
35	40.5	39	48.4	48.4	7.5	7.5	10.5	11.4	21.7	25.5	35.2	42.7
38	43.5	42	50.8	50.8	7.5	7.5	10.5	11.4	21.7	25.5	35.2	47.7
40	43.5	42	50.8	50.8	9	9	10.8	12	14	30.2	33.5	36.2
42	43.5	42	50.8	50.8	9	9	10.8	12	14	30.2	41.5	36.2
45	48.5	48	55.3	55.3	9	9	10.8	12	14	30.2	41.5	36.2
48	48.5	48	55.3	55.3	9	9	10.8	12	14	30.2	41.5	36.2
50	51.5	50	57.15	57.15	9	9	10.8	12	14	30.2	41.5	36.2
53	51.5	50	57.15	57.15	9	9	10.8	12	14	30.2	41.5	36.2
55	54.5	54	61.5	61.5	9	9	10.8	12	14	30.2	41.5	36.2
58	54.5	54	61.5	61.5	9	9	10.8	12	14	30.2	41.5	36.2
60	57.5	57	63.8	63.8	9	9	10.8	12	14	30.2	41.5	36.2
63	57.5	57	63.8	63.8	9	9	10.8	12	14	30.2	41.5	36.2
65	60.5	60	66.7	66.7	9.5	9.5	11.5	13.5	14	30.7	41.5	38.2
68	60.5	60	66.7	66.7	9.5	9.5	11.5	13.5	14	30.7	41.5	38.2
70	63.5	63	69.85	69.85	9.5	9.5	11.5	13.5	14	30.7	41.5	38.2
75	63.5	63	69.85	69.85	9.5	9.5	11.5	13.5	14	30.7	41.5	38.2
80	66.5	66	72.3	72.3	9.5	9.5	11.5	13.5	15	32.2	41.5	41.7
85	66.5	66	72.3	72.3	11	11	13.5	13.5	15	32.2	41.5	41.7
90	69.5	69	75.4	75.4	11	11	13.5	13.5	15	32.2	41.5	41.7
95	69.5	69	75.4	75.4	11	11	13.5	13.5	15	32.2	41.5	41.7
100	72.5	72	78.4	78.4	11	11	13.5	13.5	15	32.2	41.5	41.7

Design

Key features

Elastomer bellows rotating design
Unbalanced single seal, independent of rotation direction
No torsion transmitted to bellows
Shaft is protected over entire seal length
Special bellows design protects seal faces during installation
Large axial movement capability to handle shaft deflections
Suitable for low-end sterile applications and hot water pumps (RMG12)

Materials

Materials of construction

Rotary Face: Carbon, Silicon Carbide, Tungsten Carbide
Stationary Seat: Ceramic, Silicon Carbide, Tungsten Carbide
Elastomers: Nitrile, EPDM, FKM, FFKM
Metal Parts: Stainless Steel

Applications

Chemical processingPulp & paperWater & wastewater treatmentFood & beveragePharmaceuticalGeneral industrial pumps, mixers, agitators

Cross-reference

Interchangeability

MG1 interchangeable with Vulcan Type 19
MG12 interchangeable with Burgmann RMG12
MG13 interchangeable with Burgmann eMG13

FAQ

FAQs

What is the difference between MG1, MG12 And MG13?

MG12 and MG13 are both variants of the MG1 with a longer bellows tail to meet an EN 12756 fitting length: l1k for the MG12, l1N for the MG13.

Request a quote

Send the brand and part number, the seal drawing or a sample of the old seal. As the manufacturer we quote drop-in equivalents, custom and private-label seals at low minimums.

Request a quote →All OEM-compatible seals