Mechanical seals in agitators
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Transcript of Mechanical seals in agitators
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Product Information
Technical Data
The most commonly used mechanical sealin agitators worldwide
Double-acting mechanical seal, liquid lubricated
Extremely sturdy construction
Standardized wear parts due to modular design
D e s i g n S e r i e s E S D 3 4 G
E
S
D
3
4
G
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The shaft seal type ESD34G is a
double-acting bidirectional mechanicalseal made to DIN standards. It can be
applied to vessels made to DIN 28136
of steel or stainless steel with moun-
ting flanges according to DIN 28141
fitting shaft ends made according to
DIN 28154. The shaft seal type
ESD34G is designed with a total of
four seal rings, with two identical seal
ring pairs arranged back-to-back. Pro-
duct and atmospheric side seal ring
pairs are hydraulically balanced via
flexible secondary seals. This ensures
that the position of the seal rings re-mains unchanged also if the pressure
acting on the seal is reversed. Since
the flexible secondary seals are only
mechanically loaded by the force of
the springs acting on the seal rings,
their elasticity is retained. This princi-
ple allows high radial deflection of the
shaft without any negative influence
on the sealing gap and consequently
on the sealing effect.
Function Applications
Quality
The shaft seal type ESD34G is sup-
plied ready for installation as a car-
tridge unit. Prior to delivery every
mechanical seal is dynamically tes-ted under process conditions accor-
ding to an internal QM System that
conforms to DIN EN ISO 9001:2000,
and receives a test certificate.
The mechanical seal type ESD34G is
the most commonly applied shaft sealfor agitators worldwide. Due to its
modular design it can be modified to
suit various needs. By having product
wetted parts that are small in size,
materials such as Titanium, Hastelloy
or even glass-lined parts can be used
economically.
Extremely robust and distortion
resistant seal rings ensure almost
zero-leakage even under the roughest
conditions. Special spring designs
ensure uniform pre-tensioned conditi-
ons even in cases of strong agitatorshaft deflection.
In most cases the seal liquid chamber
is pressurized to a pressure level which
lies above the vessel pressure. (This
is done either by a pressure overlay or
by use of the ESD pressure compen-
sator). The achieved pressure gradient
ensures a high degree of operational
safety for applications up to 40 bar
even using the standard version of
the seal.
The main areas of application are:
Chemical industry
Hydrometallurgy
Pharmacy
Biotechnology
The worlds largest
mechanical seal for agitators.
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Optimized load distribution
in a seal ring by the use of FEA.
Almost zero-leakage
even under the roughest conditions.
Special spring designs ensure
uniform pre-tensioned conditions,
also in cases of agitator shaft deflection.
Low life cycle costs.
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Mechanical Seal ESD34G
Design Details ESD34GJ Application Limits
Dimensions
Seal type/ d1 d3 d4 d9 LK n x d2 H
ESD34G/040 175 40 110 120 145 4 x 18 188
ESD34G/060 240 60 176 170 210 8 x 18 210
ESD34G/080 275 80 204 192 240 8 x 23 213
ESD34G/100 305 100 234 214 270 8 x 23 212
ESD34G/120 330 120 260 245 295 8 x 23 243
ESD34G/140 395 140 313 292 350 12 x 23 250
ESD34G/160 395 160 313 292 350 12 x 23 271
ESD34G/180 445 180 364 348 400 12 x 23 286
ESD34G/200 445 200 364 358 400 12 x 23 304
ESD34G/220 505 220 422 380 460 26 x 23 332
all dimensions in mm; additional sizes on request; subject to change without notice
Vessel pressure
Vacuum ... 40 bar (abs.)*
Vessel temperature
-50 ... +400 C
Shaft size
40 ... 220 mm
Sliding speed
0 ... 5 m/s
*For high pressure version up to 70 bar (abs.)
(ESD64H/ESD66H)
Materials
Housing
Aluminium, stainless steel
Product-wetted parts
Stainless steel, Hastelloy, Titanium,
other special materials
Seal rings
Carbon, Silicon Carbide,
Tungsten Carbide etc.
O-rings
FKM, EPDM, Perfluor elastomers,special materials
FDA approval
Possible for all product-wetted parts
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Design Details ESD34GL
Dimensions
Seal type / d1 d3 d4 d9 LK n x d2 H
ESD34G/040 175 40 110 120 145 4 x 18 227
ESD34G/060 240 60 176 170 210 8 x 18 270
ESD34G/080 275 80 204 192 240 8 x 23 292
ESD34G/100 305 100 234 214 270 8 x 23 281
ESD34G/120 330 120 260 245 295 8 x 23 324
ESD34G/140 395 140 313 292 350 12 x 23 340
ESD34G/160 395 160 313 292 350 12 x 23 358
ESD34G/180 445 180 364 348 400 12 x 23 366
ESD34G/200 445 200 364 358 400 12 x 23 346
ESD34G/220 505 220 422 380 460 26 x 23 374
all dimensions in mm; additional sizes on request; subject to change without notice
Application Limits
Vessel pressure
Vacuum ... 40 bar (abs.)*
Vessel temperature
-50 ... +400 C
Shaft size
40 ... 220 mm
Sliding speed
0 ... 5 m/s
*For high pressure version up to 70 bar (abs.)
(ESD64H/ESD66H)
Housing
Aluminium, stainless steel
Product-wetted parts
Stainless steel, Hastelloy, Titanium,
other special materials
Seal rings
Carbon, Silicon Carbide,
Tungsten Carbide etc.
O-rings
FKM, EPDM, Perfluor elastomers,special materials
FDA approval
Possible for all product-wetted parts
Materials
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ESD GmbH
EKATO Sicherheits-
und Dichtungstechnik
Schnauer Strasse 66
79669 Zell i.W.
Germany
Phone
+49 7625 9282-0
Fax
+49 7625 9282-11
E-mail
Internet
www.ekato.com
Subjecttochangesw
ithoutnotice.
ESD34G-gb-4-04.0
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