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MG1 Compact,Unitised,Unbalanced,Elastomer Single Spring Bellow Mechanical Seal | Replacement for EagleBurgmann eMG1 and MG1 Elastomer bellows seals
MG1 Compact,Unitised,Unbalanced,Elastomer Single Spring Bellow Mechanical Seal | Replacement for EagleBurgmann eMG1 and MG1 Elastomer bellows seals - Image 2
MG1 Compact,Unitised,Unbalanced,Elastomer Single Spring Bellow Mechanical Seal | Replacement for EagleBurgmann eMG1 and MG1 Elastomer bellows seals - Image 3

MG1 Compact,Unitised,Unbalanced,Elastomer Single Spring Bellow Mechanical Seal | Replacement for EagleBurgmann eMG1 and MG1 Elastomer bellows seals

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The Formax MG1 is a compact, unbalanced elastomer bellows mechanical seal with a single spring and a unitised rotating assembly.
Offered for selected EagleBurgmann MG1 replacement applications, it operates independently of shaft rotation direction.
Catalogued shaft diameters range from 10 to 100 mm.
Installation dimensions, seal face materials and operating conditions must be verified before ordering.

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  • Product Overview

The MG1 mechanical seal combines an elastomer bellows with a single spring to maintain contact between the rotating seal face and stationary seat. The bellows provides secondary sealing and transmits torque to the rotating assembly.

The compact, unitised design simplifies handling and installation in compatible pump equipment. The bellows geometry provides flexibility for limited axial movement and helps accommodate minor shaft deflection within the approved installation limits.

The bellows profile is designed to resist creasing or folding under the intended operating conditions. Correct installation and material selection remain essential for reliable operation.

  • Design Features
Feature Description
Seal Category Elastomer bellows component seal
Seal Arrangement Single mechanical seal
Balance Unbalanced, according to the HJMG1 supplier specification
Spring Design Single spring
Bellows Design Rotating elastomer bellows
Torque Transmission Through the elastomer bellows assembly
Direction of Rotation Independent of shaft rotation direction
Construction Compact, unitised rotating assembly
Bellows Flexibility Allows limited axial movement within the specified assembly limits
Replacement Reference Selected EagleBurgmann MG1 configurations, subject to verification
  • Operating Parameters
Parameter HJMG1 Supplier-Stated Specification
Product Model Formax MG1
Catalogued Shaft Diameters 10–100 mm; selected sizes listed below
Maximum Operating Pressure 16 bar / 1.6 MPa / approximately 232 psi
Operating Temperature −20 to +140°C / −4 to +284°F
Maximum Sliding Velocity 10 m/s / approximately 33 ft/s
Direction of Rotation Bidirectional
Permissible Axial Movement Confirm for the selected size and assembly

Operating limits depend on the seal size, material combination, fluid properties and installation conditions. Maximum pressure, temperature and sliding velocity must not be assumed to apply simultaneously. The full temperature range does not apply to every elastomer option.

  • Material Options
No. Component Catalogued Materials
1 Stationary Seat Cup NBR, FKM/FPM, HNBR
2 Stationary Seat Silicon carbide, aluminium oxide ceramic, cemented carbide
3 Rotating Seal Face Carbon graphite, silicon carbide, cemented carbide
4–5 Retainers Stainless steel 304 or 316
6 Spring Stainless steel 304 or 316
7 Elastomer Bellows NBR, FKM/FPM, HNBR

Select the face pairing, elastomers and metal components according to fluid chemistry, concentration, temperature, lubrication and solids content.

EPDM elastomers, specific carbide grades and other material options require confirmation for the selected supplier configuration.

  • Dimensions & Installation

The following table lists the supplier’s MG1 dimensions for selected shaft diameters from 10 to 100 mm. Compare all dimensions with the existing seal and equipment drawing before ordering.

All dimensions are in millimetres. The table and cross-sectional drawing must be used together.

Symbol Description
d1 Shaft diameter
d2 Stationary seat housing dimension, shown with H11 tolerance
d3 Stationary seat housing dimension, shown with H8 tolerance
d4 Minimum seal chamber clearance diameter
d5 Rotating assembly envelope dimension shown in the drawing
d6 Minimum internal clearance diameter shown in the drawing
L1 Rotating assembly working height
L2 Stationary seat assembly axial dimension shown in the drawing
L3 Axial housing dimension shown in the drawing
L4 Housing chamfer dimension; the drawing specifies a 20° chamfer
  • MG1 Dimensional Table — All Dimensions in mm
d1 d2 d3 d4 d5 d6 L1 L2 L3 L4
10 17 21 24 22.5 20.5 14.5 6.6 4 1.5
12 19 23 26 25 22.5 15 6.6 4 1.5
14 21 25 30 28.5 26.5 17 6.6 4 1.5
15 — — 30 28.5 26.5 17 — — —
16 23 27 30 28.5 26.5 17 6.6 4 1.5
18 27 33 33 32 29 19.5 7.5 5 2
19 — — 38 37 33 21.5 — — —
20 29 35 38 37 33 21.5 7.5 5 2
22 31 37 38 37 33 21.5 7.5 5 2
24 33 39 44 42.5 38 22.5 7.5 5 2
25 34 40 44 42.5 38 23 7.5 5 2
28 37 43 50 49 44 26.5 7.5 5 2
30 39 45 50 49 44 26.5 7.5 5 2
32 42 48 55 53.5 46 27.5 7.5 5 2
33 42 48 55 53.5 46 27.5 7.5 5 2
35 44 50 59 57 50 28.5 7.5 5 2
38 49 56 61 59 53 30 9 6 2
40 51 58 64 62 55 30 9 6 2
42 — — 67 65.5 58 30 — — —
43 54 61 67 65.5 58 30 9 6 2
45 56 63 70 68 60 30 9 6 2
48 59 66 74 70.5 63 30.5 9 6 2
50 62 70 77 74 65 30.5 9.5 6 2.5
53 65 73 81 78.5 70 33 11 6 2.5
55 67 75 83 81 72 35 11 6 2.5
58 70 78 88 85.5 75 37 11 6 2.5
60 72 80 91 88.5 79 38 11 6 2.5
65 77 85 96 93.5 84 40 11 6 2.5
68 81 90 100 96.5 88 40 11.3 7 2.5
70 83 92 103 99.5 90 40 11.3 7 2.5
75 88 97 110 107 95 40 11.3 7 2.5
80 95 105 116 112 100 40 12 7 3
85 100 110 124 120 107 41 14 7 3
90 105 115 131 127 114 45 14 7 3
95 110 120 136 132 119 46 14 7 3
100 115 125 140 137 124 47 14 7 3

“—” indicates that the dimension is not provided in the source table. Missing values must be confirmed; they do not automatically indicate that the shaft size is unavailable.

These are catalogue reference dimensions. Confirm tolerances, seat configuration, installed working height and the approved assembly drawing before ordering.

  • Typical Applications
Industry or Service Typical Equipment
Water Supply Water pumps and compatible distribution equipment
Water and Wastewater Treatment Wastewater pumps and suitable submersible pumps
Chemical Processing Compatible standard chemical and transfer pumps
Pulp and Paper Suitable stock pumps and circulation equipment
General Process Industry Circulating pumps and helical screw pumps
Oil Handling Compatible oil-transfer and circulation duties
Food, Beverage and Sugar Processing Suitable pump installations with verified wetted materials

Equipment type alone does not establish suitability. Review the fluid, seal chamber, operating conditions and material combination for each application.

  • Media & Solids Handling

Candidate media include water, wastewater, selected oils, latex and compatible chemical liquids. Dilute slurry and pulp duties require a review of solids concentration, particle size, abrasiveness and fibre characteristics.

The supplier lists slurry concentrations up to 5% by weight and pulp concentrations up to 4%. These are application references rather than universal handling guarantees. Confirm the pulp concentration measurement basis and complete duty before selection.

Food-contact, drinking-water and hygienic applications require configuration-specific material documentation.

  • EagleBurgmann MG1 Replacement Compatibility

The Formax MG1 is offered for selected EagleBurgmann MG1 replacement applications. Verify the exact dimensions, stationary seat arrangement, working height, materials and operating duty before ordering.

Enquiries referencing eMG1, MG12, MG13 or other related variants require separate verification. A common family name does not establish dimensional or performance equivalence.

Selection Check Information Required
Existing Seal Manufacturer, complete model and material codes
Shaft or Sleeve Diameter and installation details
Rotating Assembly Working height and clearance dimensions
Stationary Seat Seat type, diameters, axial dimensions and mounting arrangement
Operating Duty Fluid, solids content, pressure, temperature and shaft speed
Seal Arrangement Single seal or separately specified multiple-seal arrangement
Documentation Drawing or measured photographs
Order Requirements Quantity and required delivery date
  • Frequently Asked Questions
Question Answer
Is MG1 a rubber bellows or metal bellows seal? It is an elastomer, or rubber, bellows mechanical seal. Its metal spring and retainers do not make it a metal bellows seal.
Is this MG1 direction-dependent? No. The specified design operates independently of shaft rotation direction.
What shaft sizes are listed? The supplied dimensional table covers selected shaft diameters from 10 to 100 mm. Several seat-related dimensions require confirmation for the 15, 19 and 42 mm entries.
Is this the same product as EagleBurgmann eMG1? No. It is a Formax MG1 replacement offering with its own supplier specification. eMG1 dimensions, ratings and approvals must not be assumed to apply.
Can it handle slurry or pulp? Selected dilute slurry and pulp duties may be considered after reviewing solids concentration, particle properties, lubrication and operating conditions.
What information is needed for a quotation? Provide the existing seal designation, dimensions, materials, fluid, pressure, temperature, shaft speed and quantity.
  • Request a Quote

Need an MG1 replacement seal? Send your existing seal designation, installation dimensions and operating conditions to Formax Fluid for configuration review and quotation.

 

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