Table of
Materials
Material code
Description
BURGMANN
1)E N
12756
Material code
Description
BURGMANN
1)E N
12756
Material code
Description
BURGMANN
1)E N
12756
Face Materials (Item 1/2)Synthetic Carbons
̈A Buko 03Carbon graphite,antimony impreg.̈B
Buko 1Carbon graphite, resin impreg.approved for foodstuffs
B3Buko 02Carbon graphite, resin impreg.B5Buko 34Carbon, resin bonded
C
Buko 22Electrographite, antimony impreg.Metalle
̈E
Bume 20Cr-Steel G Bume 17CrNiMo-Steel
̈S
Bume 5Special cast CrMo-Steel T 41
Bube 281
1.4462 DLC-coated
Carbides
U =Tungsten carbides
̈U 1Buka 1 brazed Tungsten carbide, Co-binder ̈U 2Buka 16 solid Tungsten carbide, Ni-binder ̈U 22
Buka 16shrunk-in Tungsten carbide, Ni-binder U 3Buka 15 solid Tungsten carbide, NiCrMo-binder U 37Buka 15shrunk-in Tungsten carbide, NiCrMo-binder U 7Buka 17 solid Tungsten carbide, binder-free
Q = Silicon carbides
̈Q 1
Buka 22 solid SiC, silicon carbide, sintered
pressureless
̈Q 12Buka 22shrunk-in SiC, sintered pressureless ̈Q 2Buka 20 solid SiC-Si, reaction bonded ̈Q 22Buka 20shrunk-in SiC-Si, reaction bonded Q 3Buka 30solid SiC-C-Si, carbon silicon impr.Q 32Buka 30shrunk-in SiC-C-Si, carbon silicon impr.Q 4Buka 24 solid C-SiC, carbon surface silicated Q 19Buka 221SiC, DLC-coated
Metal Oxides (Ceramics)
̈V
Buke 5Al-Oxide >99%V 2Buke 3Al-Oxide >96%
X
Buke 8
Steatite (Magnesia silicate)
Plastics
̈Y 1
Buku 2PTFE, glassfibre reinforced Y 2
Buku 3PTFE, carbon reinforced
Secondary Seal Components (Item 3)Elastomers, not wrapped
B B Butyl rubber (IIR 2))
̈E E Ethylene propylene rubber (EPDM 2)), e.g. Nordel ®
K K Perfluorocarbon rubber (FFKM 2)),e.g. Kalrez ®Chemraz ®, Simriz ®N
N Chloroprene rubber (CR Neopren ®
̈P
P Nitrile-butadiene-rubber (NBR 2)) e.g. Perbunan ®
S
S Silicone rubber (MVQ 2)),e.g. Silopren ®
̈V
V Fluorcarbon rubber (FKM 2)),e.g.Viton ®Elastomers, wrapped
̈M 1
TTV FKM, double PTF wrapped ̈M 2
TTE EPDM, double PTF wrapped M 3TTS MVQ, double PTFE wrapped M 4TTN CR, double PTF wrapped M 5FEP FKM, FEP-wrapped
M 7
TTV/T
FKM, double PTFE wrapped/PTFE, solid
Differing Materials
U 1
K/T
Perfluorocarbon rubber/PTFE
Non-Elastomers
G Statotherm ®Pure graphite
T T PTFE (Polytetrafluorethylene)T 2T2PTFE, glassfibre reinforced T 3T3PTFE, carbon reinforcedt
T 12T12
PTFE, carbon-graphite reinforced Y 1
Burasil ®-U
Static seal, non-asbestos
Spring and Construction Mat.(Item 4/5)Spring Materials
̈G    1.4571CrNiMo-steel
̈M
Hast. C4
Hastelloy ®C-4 (2.4610)Nickel-base alloy
Construction Materials
D
St C-steel ̈E
1.4122Cr-steel F    1.4301CrNi-steel F    1.4308CrNi-cast steel F 1  1.4313special CrNi-cast steel ̈G    1.4401CrNiMo-steel ̈G    1.4571CrNiMo-steel G    1.4581CrNiMo-cast steel ̈G 1  1.4462CrNiMo-steel G 2  1.4439CrNiMo-steel G 3  1.4539NiCrMo-steel M = Nickel-base alloy ̈M Hast. C4Hastelloy ®C-4 (
2.4610)M 1Hast. B2Hastelloy ®B-2 (2.4617)M 3Carp.Carpenter ®20 Cb3 (2.4660)M 4Monel K500Monel ®alloy K500 (2.4375)M 5Hast. C-276Hastelloy ®C-276 (2.4819)M 6Incon. 718Inconel ®718 (2.4819)T = Other materials T 1  1.4505CrNiMoCuNb-steel T 2Titan Pure titanium (
3.7035)T 3Incon. 625Inconel ®625 (2.4856)T 4Carp. 42Carpenter ®42 (1.3917)T 5Incon. 800Incoloy ®800 (1.4876)
Legend for seal selection by media (starting page 3)
̈ Preferred materials
1)Standard following EN 12756, Dec. 20002)Shortway acc. to ISO 1629, Nov. 2004
Notes on the medium (2)
G = Mixture/group N = Natural product ®= Trade mark S = Collective term V
= Impurities
Concentration (3)
–= “any“
< 10= less than 10 weigth %ϳ10= approx. 10%F10= Solids up to 10%L = Defined solution < L = Unsaturated solution > L = Supersaturated sol.Sch = Melt
Sus
= Suspension
Temperature (4)
< 100= less than 100 °C > F = > Solidifying temp.> K    =  > Crystallization
temperature
< Kp =< Boiling temperature > Pp => Pour point TG =< Material tempera-ture limit
Arrangem.of shaft seal (5)
S = Single mechanical seal S1= Internal arrangement S2= External arrangement S3
= Internal arrangement with rotating counter ring
D = Dual mechanical seal D1= Back-to-back D2= Tandem
D3= Face-to-face
Q = Quench
Q1= Without throttle bushing
Q2= With throttle bushing
Q3
= With auxiliary seal
Auxiliary piping (6)
00= None (“dead end“)01= Internal circulation 02= Connection from pump case 08= Supply of external fluid 08a = Flushing 08b = Quench (static)09= Throughflowing
quench or buffer fluid 10= Circulating quench
or buffer fluid,
pressureless
11= Same as 10, but
pressurized 12= Pressure transmitter
Auxiliary measures (7)
D = Steam quench
(H), H = Heating (if necessary)
kD = Conical stuffing box
SS = Splash guard
SW = Replacement of
buffer medium
QW = Replacement of
quench medium
ThE = Thermal buffer
Mechanical seal type on product side (8)1= With elastomer O-rings, rotating springs in contact with the product 2= same as 1 but springs not in contact with the product 3= same as 2 but
stationary springs 4= same as 2 but metal-free on product side
5= with elastomer bellows 6= with metal bellows X = special design Material selection (9)For designations acc. to EN 12756see table of materials.Health hazard warnings (10)A = Corrosive C = Carcinogenic C1= Proven in humans C2= Proven in animal experiments C3= Suspected for good reason G = Toxic H = Skin resorption R = Irritant S = Sensitization X = Moderately toxic 1= Vapour pressure/gas
2
= Corrosion 3= Exclusion of air 4= Lubricating properties 5= Icing risk 6= Leakage
7= Readily flammable 8= Flame-promoting 9= Potentially explosive 0
= Insufficient information
TLV (11)
a fig.= TLV in ppm mg = TLV in mg/m 3
#= mg/m 3of base substance *
= No TLV because it is dearly carcinogenic
Normal cond. (12)
ga = Gaseous fe = Solid fl = Liquid kr = Crystalline pa
= Viscous
Melting point (14)
<= Efflorescence temperature
<= Sublimation temperature ...%
= Values for ...%aqueous solution
Boiling point (15)
<= Boiling point of the azeotrope Z = Decomposition temperature
(...)= Reference pressure in mbar
...%
= Values for ...%aqueous solution
Density (g/cm 3) (16)
(+)= Heavier then air (–)= Lighter than air
(...)= Reference temp. in °= Density of the azeotrope at ...%
reaction in the shaft...%
= Values for ...%aqueous solution
Solubility in water (13)
(...)
= Deviating reference temperature
–= Solubility decrease with rising temperature
++= Solubility increases greatly with rise in temperature sll = Soluble in less than 1 part water ll = Soluble in    1 –10 parts water l = Soluble in  10– 30 parts water wl = Soluble in  30– 100 parts water sl = Soluble in  100– 1000 parts water ssl = Soluble in 1000– 10000 parts water unl
= Soluble in more than 10000 parts water

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