QDP Flyer - EagleBurgmann

QDP:24 

Mechanical seals 

Product range 

MG 

M32 

M7N 

HJ92 

Cartex ® 

Unitex ®

Table of Materials 

Material Code | Description 

EN 12756 | Burgmann 

Face materials (Position 1/Position 2) 

B | Buko 1 | Carbon graphite, artificial resin impregnated, approved for 

foodstuffs 

Q1 | Buka 22 solid | SiC, silicon carbide, pressureless sintered 

Q12 | Buka 22 shrunk-in | SiC, pressureless sintered 

Secondary seals (Position 3) 

E | E | Ethylene propylene diene rubber (EPDM), e.g. Nordel ® 

P | P | Nitrile butadiene rubber (NBR) e.g. Perbunan ® 

V | V | Fluorocarbon rubber (FPM), e.g. Viton ® 

M1 | TTV | FPM, double PTFE wrapped 

M2 | TTE | EPDM, double PTFE wrapped 

U1 | K/T | Perfluorocarbon rubber/ PTFE 

Spring and construction materials (Position 4, Position 5) 

G | 1.4571 | CrNiMo-steel 

G | 1.4401 | CrNiMo-steel casting 

M | Hast. C4 | Hastelloy ® C-4 (2.4610) 

Please note 

All technical information is based on 

comprehensive testing and our wealth 

of practical experience. However, given 

the diversity of possible applications, the 

information should only be considered as a 

guideline. A guarantee in an individual instance 

is only possible if we are familiar with the 

precise conditions for use and this has been 

confirmed in a separate agreement. With 

especially critical operating conditions, e.g. with 

mixed products, we recommend taking advice 

from our specialist engineers. In all cases, it 

must be noted that the operating limits have 

a mutual influence on one another and thus 

not all maximum values can be assumed 

simultaneously. We reserve the right to make 

changes without notice. 


Only the types of mechanical seals in the sizes 

and the combinations of materials shown in this 

brochure can be supplied within the framework 

of and under the conditions applicable for 

QDP:24. Please inquire regarding other 

variants. The immediate delivery quantities of 

QDP:24 mechanical seals are limited.


... like the fire 

brigade – when 

speed of response 

matters 

QDP:24. The quick delivery 

program for mechanical 

seals from EagleBurgmann 

You aim to keep your pumps and 

facilities running problem-free as far as 

possible, avoiding downtimes and costs 

in the process. Yet in the event that 

something does happen, you can still 

find that you are missing the right spare 

seal. Burgmann QDP:24 means that you 

have one less worry in future… 

n Reliable, on-the-dot delivery of your 

seal (just-in-time) 

n Delivery on all working days within 

just 24 hours of receiving your order 

n No quibbles and no need to inquire 

about delivery dates/times – a 

promise is a promise 

n Optimum adherence to deadlines 

n The QDP:24 program comprises 

approximately 3,200 different types 

or sizes (MG1, MG12, M32, M32N, 

HJ92N, HJ977GN, M7N, H75N, 

Cartex-SN, Cartex-DN, Unitex) 

n The program range is the fruit of our 

wealth of experience 

n QDP:24 covers the largest part of all 

industrial pump applications 

n High-quality materials for a wide 

range of applications 

n Enables you to reduce stock 

inventories and the variety of types 

used 

n QDP:24, your first step towards 

realigning spare parts procurement 

and storage

MG1. 

n Single seal 

n For plain shafts 

n Rotating spring 

n Independent of direction of 

rotation 

Mechanical seals in the MG series are 

amongst the most commonly used. The 

bellows is not subjected to any torsional 

stress, and sophisticated geometry 

enables it to handle a number of tasks: 

it is a seal face carrier, secondary 

sealing element and drive collar. 

However, the seal face is actually driven 

via the “L” rings and the spring. There 

are no bonded joints. Highly 

recommended for applications with 

media containing solids, e.g. in waste 

water and sewage applications. 

Operational limits 

p1 = 12 (16) bar 

vacuum up to 0.5 bar 

(up to 1 bar with seat locking) 

t = –20 … 120 (140) °C 

vg = 10 m/s 

Stationary seat option 

G60

MG1-G6/G60 MG12-G6/G60 

QDP:24 dimensions: 

d1 = 12 … 95 mm 

Materials: 

Q1Q1V(E,P)GG, 

AQ1V(E,P)GG 


d1 = 12 … 70 mm 

As for MG1, but with extended bellows 

to achieve the fitting length l1k acc. to 

EN 12756 with stationary seat G6 or 

G60 (d4 min. acc. to EN 12756 is 

exceeded). 

Materials: 

Q1Q1V(E)GG, 

AQ1V(E)GG

M32. 

n Single seal 

n Unbalanced 

n Conical spring 

n Dependent on direction of 

rotation 



Mechanical seals of the M3 series are 

immensely popular as a machine seal 

element. 

Extremely rugged and reliable, they 

cover a wide spectrum of applications: 

in water pumps, sewage pumps, 

submerged pumps, chemical pumps etc. 


p1 = 10 bar 

t = –20 … 180 °C 

vg = 10 (15) m/s 

Axial movement: ± 1.0 mm

M32 M32N 


d1 = 16 … 55 mm with stationary seat 

G4, acc. to EN 12756 

Materials: 

BQ1VGG, 

BQ1EGG 


d1 = 16 … 70 mm 

with stationary seat G9 (Burgmann 

Standard) 

Materials: 

BQ1V(E,M1)GG

M/H7.. 

n Single seals 



rotation 

n EN 12756 

Mechanical seals of the H7N and M7N 

series are ideal for stock rationalizations 

as they are designed for universal 

applications. The seal faces are loosely 

inserted and can be easily exchanged, 

allowing for simplified storage and easy 

adaptation of the face material 

combination or rapid repair. 

The super-sinus spring on the M7N 

provides practically even drive force 

over the full range of motion tolerances. 

It has no welded points, thus reducing 

the risk of corrosion. 


H75N: 

p1 = 25 (40) bar 

t = –50 … 220 °C 

vg = 20 m/s 

Axial movement 

± 2 to 4 mm, Ø-dependent 

M7N: 

p1 = 16 (25) bar 

t = –50 … 200 °C 

vg = 20 m/s 

Axial movement 

d1 up … 25 mm: ± 1.0 mm 

d1 28 … 63 mm: ± 1.5 mm 

d1 over 65 mm: ± 2.0 mm

M7N H75N 


d1 = 14 … 100 mm 

Unbalanced seal for plain shafts. 

Materials: 

Q1Q1E(V,M1)GG, 

Q1BE(V,M1)GG 


d1 = 28 … 90 mm 

Unbalanced seal for stepped shafts. 

With multiple springs in sleeves. 

Materials: 

AQ1E(V, M1, M2)GG

HJ9... 

10 

n Single seals 

n Balanced 


rotation 



n Enclosed springs 

n EN 12756 

Due to their protected arrangement of 

springs, mechanical seals of the HJ 

series are ideal for applications 

involving media containing solids or 

which are highly viscous; model 

applications are, for instance, in the 

sugar industry, paper industry or in 

waste water and sewage processing. 

Robust, reliable, with no adhesion or 

clogging of springs. 


p1 = 0.8 abs. … 25 bar 

t = –50 … 220 °C (HJ92N) 

= –20 … 180 °C (HJ977GN) 

vg = 20 m/s (HJ92N) 

= 10 m/s (HJ977GN) 

Axial movement ± 0.5 mm

HJ92N HJ977GN 


d1 = 22 … 75 mm 

Materials: 

BQ1VGG 


d1 = 20 … 100 mm 

Materials: 

Q12Q12V(M1)GG 

11

Cartex ® 

1 

n Cartridge seal 

n Balanced 


rotation 

n Stationary spring 

n Rotating seat 

Cartex ® mechanical seals are fully preassembled 

units for use in conventional 

stuffing box compartments of centrifugal 

pumps. As single and as double seals, 

they are equipped with all auxiliary 

connections for key modes of operation. 

High-quality materials enable a 

practically universal range of 

applications. 


t = –40 … 220 °C 

(check O-ring temperature 

resistance) 

p1 = 25 bar } Q1/B combination of materials 

vg = 16 m/s 

p1 = 12 (20*) bar 

}Q1/Q1 

vg = 10 m/s 

p3 = 25 bar 

∆p (p3–p1) ≤ 25 bar 

(recommended 1.5 … 2 bar) 

(7 bar for buffer media with poor 

lubricating properties) 

Axial movement ± 1.0 mm

Cartex-SN Cartex-DN 


d1 = 25 … 75 mm 

Single seal with flushing connection. 

Materials: 

Q1Q1VMG, 

Q1Q1U1MG, 

BQ1U1MG, 

BQ1VMG 


d1 = 25 … 75 mm 

Double seal, double pressure-balanced, 

buffer fluid system required, integrated 

circulation device. 

Materials: 

Q1Q1VMG-BQ1VMG, 

Q1Q1U1MG-BQ1VMG, 

BQ1VMG-BQ1VMG, 

BQ1U1MG-BQ1VMG 

1

Unitex ® 

1 

n Cartridge unit 

n Single seal 


rotation 

n Elastomer bellows 

n Unbalanced 


Unitex ® mechanical seals are fully preassembled 

units for the mid-pressure 

and mid-stress range in conventional 

stuffing box compartments. High-quality 

materials used in construction and for 

the sliding parts facilitate a wide range 

of applications. It is ideal as a 

substitute for packings, without 

requiring time-consuming adjustments 

or preparatory work. 


dN = 25 … 75 mm 

1.000” … 2.625” 

p1 = 12 (16) bar 

t = –20 … 120 (140) °C 

vg = 10 m/s 

Admissible axial movement: ± 0.5 mm

Unitex-G60 


dN = 1.000” … 2.625” 

Materials: 

Q1Q1V(E)GG, BQ1V(E)GG 


dN = 25 … 75 mm 

Materials: 

Q1V(E)GG, Q1Q1V(E)GG 

UNITEX/dw-G60 

Werb-Nr. 2847 

1

Burgmann Industries 

GmbH & Co. KG 

Aeussere Sauerlacher Str. 6-10 

D-82515 Wolfratshausen 

Phone +49(0)8171 / 23-0 

Telefax +49(0)8171 / 23-1246 

www.eagleburgmann.com 

QDPE / E2 / 3.000 / 07.07 / 9.7.5 © EagleBurgmann Marketing Communications Germany

QDP Flyer - EagleBurgmann

Create successful ePaper yourself

Delete template?

Save as template?