Shaft seals

Because of the modular design of variopumps gear pumps there are various possibilities of shaft seals available.
Depending on the specific operating data you can choose - even years after first start up - the best seal. And you will match both: best technical solution in connection with cost optimization.
For special applications sealing types may also be combined (e.g. gap seal with lip seal).

single internal mechanical seal

single internal mechanical seal

universal
all purpose applications
low and medium viscosity
max. 16 bar system pressure
up to 320 °C

single external mechanical seal

single external mechanical seal

for high viscous, sticky or crystallizing materials
low up to high viscosity
low system pressure
up to 320 °C
pressure less flushable (suitable for vacuum extraction)

double mechanical seal

double mechanical seal

for toxic, sticky, polymerizing or crystallizing materials
low up to high viscosity
up to 16 bar system pressure
up to 320 °C
flushable up to 16 bar

magnetic coupling

hermetic seal with magnetic coupling

for toxic, malodorous or hazardous materials
hermetic seal
low or medium viscosity
high system pressure
up to 400 °C
double can for heating / cooling and observance

gap seal

gap seal

for hot melts , plastics and high viscous materials
high and ultra high viscosity
high system pressure
up to more than 400 °C
coolable, heatable

lip seal

lip seal

cheap solution for simple applications
low viscosity
up to ~120 °C