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© NETZSCH www.netzsch.com 14.08.2008 - 1
Gland Packing• simple design• easy replacement of packing
rings without dismantling the pump
• wear protection with coated shaft
• design with flushing connection also available
• for applications where mechanical seals are not suitable, e.g. adhesive and coagulating fluids
Shaft Seals
© NETZSCH www.netzsch.com 14.08.2008 - 2
• single acting seal, non balanced• bi-directional• for pressures up to 230 Psi• torsion free elastomer bellows• suitable for large axial movements(+/- 2 mm)
• robust open spring construction• economical, standard shaft seal for most applications
MG1-S50-G6/... Q1 Q1 V GG
MG1-G60/... Q1 Q1 V GG
Burgmann MG 1
Shaft Seals
© NETZSCH www.netzsch.com 14.08.2008 - 3
• Single acting, non balanced• bi-directional• for pressures up to 230 Psi
• exchangeable faces
• Dimensions acc. To DIN 24960
• Super-Sinus spring
• for chemical applications; with fluids with up to a dry solids content of 5 %.
Burgmann M7N
Shaft Seals
product
© NETZSCH www.netzsch.com 14.08.2008 - 4
• Single acting, balanced• bi-directional• for pressures up to 360 Psi
• dimensions acc. To DIN 24960
• enclosed spring
• external profile with very few gaps
• For applications in environmental, chemical and food industries; for adhesive products or products with a high solids content
Burgmann HJ 977
Shaft Seals
© NETZSCH www.netzsch.com 14.08.2008 - 5
Type SHJ
• single acting, balanced• bi-directional• for pressures up to 230 Psi• crevice free, no dead areas; for optimal cleaning
• encapsulated spring• special design with smooth outside surface
• in accordance with EHEDG and QHD regulations
• elastomer to FDA standards
only for NEMO® Hygienic and Aseptic Pump
Shaft Seals
© NETZSCH www.netzsch.com 14.08.2008 - 6
• pre-assembled cartridge seal
• fastest possible assembly
• no faulty mounting
Cartridge Seal Type Cartex
Cartex QE single acting for quench
Cartex DE double acting for applications with and without sealing pressure
Shaft Seals
© NETZSCH www.netzsch.com 14.08.2008 - 7
Double Mechanical SealTANDEM - Arrangement
• for fluids which tend to cure easily at the seal faces
• to prevent leakage to the atmosphere
• the quench fluid is under static pressure.
Shaft Seals
product buffer liquid
© NETZSCH www.netzsch.com 14.08.2008 - 8
Double mechanical seal, tandem arrangement,in a NEMO® aseptic pump type SA
Shaft Seals
© NETZSCH www.netzsch.com 14.08.2008 - 9
• detecting of leakage• cooling and lubricate the second
mech. Seal (Tandem arrangement)• the product has no air contact• dry running protection• API plan 62
For single mech. Sealswith quench and Tandem arrangement
Quench Pot
mech. seal
© NETZSCH www.netzsch.com 14.08.2008 - 10
Double Mechanical Seal BACK-TO-BACK
- Arrangement• for adhesive, toxic fluids and products
with a high content of dry solids
• for vacuum up to – 26.5 inches of mercury
• pressure control for buffer liquid required
• the pressure of the sealing liquid
must be a minimum of 30 Psi higher than
the pressure of the pumped product.
• long service life due to the clean
lubrication film between the sealing faces.
Shaft Seals
atmosphere product side
buffer liquid
© NETZSCH www.netzsch.com 14.08.2008 - 11
TS 1016 TS 2000
SPS
SPU
SPN
SPI
Thermosyphon vessel
© NETZSCH www.netzsch.com 14.08.2008 - 12
Sticky products
Single mech. Seal
Single with quench
Tandem arrangement
Back to back
M7 MG1 HJ Cartex
recommended possible not recommended
not possible
© NETZSCH www.netzsch.com 14.08.2008 - 13
High viscosity products
Single mech. Seal
Single with quench
Tandem arrangement
Back to back
M7 Cartex HJ packing
recommended possible not recommended
Not possible
Not possible
(with flushing)
© NETZSCH www.netzsch.com 14.08.2008 - 14
corrosive products
Single mech. Seal
Single with quench
Tandem arrangement
Back to back
M7 MG1 Cartex
recommended possible Not recommended
(with special metallic parts)
(metal free)Not possible
© NETZSCH www.netzsch.com 14.08.2008 - 15
Products with solids
Single mech. Seal
Single with quench
Tandem arrangement
Back to back
M7 MG1 CARTEX
recommended possible Not recommended
- 5 %, - 12 %,* > 15 - 50 % - 20 %
Not possible
* only for sludge
Recommended