Mechanical seal
max. 16 bar, -20 °C ... +160 °C | HR series BURGMANN INDUSTRIES



Single seal
Independent of direction of rotation
Multiple springs stationary
Seat rotating
Seat arranged directly behind the impeller
Spring protection sleeve
Variant with cylindrical spring and acc. EN 12756 (HRZ1) available
Variant as cartridge with/without guide sleeve for application with/without quench (HR2, HR3)
Dual seal as cartridge unit (HRKS-D) available


Especially for application in solids containing media without external flush or internal product circulation. Solids content 40 % (single seal) and 60 % (double seal)
Operation under vacuum without seat locking possible
Pumping screw for increased circulation available
Springs are protected from product and leakage
No damage of the shaft by dynamically loaded O-Ring
Insensitive to shaft deflections due to stationary design

Recommended applications

Water and waste water technology
Power plant technology
Pulp and paper industry
Oil and gas industry
Mining industry

Dirty, abrasive and solids containing media

Sewage water pumps
Dredger pumps
Oil sand extraction
Suspension pumps of flue-gas desulphurization plants (FGD)



Mechanical seals

Magnetic couplings

Carbon floating ring seals

Seal supply systems

Gaskets / Compression Packings

Expansion joints

Special products