HRS MA43 - U-rings

Type/Ref.: Rod seal
Pressure (bar): 35/350
Temperature (°C): -150 to +250
Speed (m/s): up to 15

HRS MA43 is a PTFE U-ring seal which is provided with a steel V spring.

Standard material

U-ring: PTFE/carbon compound
V spring: non-corrosive, acid resistant steel 1.4310

Area of application

Diverse applications in all branches of general mechanical and apparatus engineering, hydraulics and pneumatics, chemical and processing technology, reciprocating movements.


The HRS MA43 is a single acting, internal sealing U-ring with sealing lips of varying design. These achieve optimal sealing strength and reduces friction. This results in the seal having an exceptionally good service life. The metal spring permanently activates the sealing lips which guarantees zero leakage even in an unpressurized state.


All types of hydraulic oils, hot air, steam, most chemicals.

Operational application limits

Pressure (MPa/bar): 35/350
Temperature (°C): -150 to +250
Running speed (m/s): up to 15


We generally recommend split seal housing. In a limited range, half-open or closed housing is also possible. Please also follow the general installation instructions.


For operational conditions other than the standard applications, further PTFE compounds and V springs made of ELGILOY® are available. The use of PTFE compounds in the pharmaceutical and foodstuffs industries is completely harmless. However, in this case, the spring housing of the seal should be filled completely with a flexible silicone casting compound so that a smooth surface is formed. Please mention this application when placing your orders.