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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

Info@esd-gmbh.de

Internet

www.ekato.com

Subjecttochangesw

ithoutnotice.

ESD34G-gb-4-04.0

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