Motor load interface sealing arrangement

A sealing arrangement for the interface between a fluidic load and a motor, the sealing arrangement comprising:

• a rotating shaft having a shaft body extending along an axis (A) and having a first end, configured to, in use, be in driving engagement with a fluidic load, and a second end configured to, in use, be in engagement with a motor for rotation by the motor,
• the rotating shaft and a shoulder extending radially outwards from the shaft body at the first end;
• wherein the sealing arrangement further comprises:
• a first, major seal extending radially around the shaft;
• a second, minor seal axially spaced from the first seal towards the second end and mounted around the shaft;
• and
• a seal holder block located between the first seal and the second seal around the shaft body;
• wherein the seals are arranged such that pressure acting on an axially outer surface of the shoulder causes the first seal to create a seal with the seal holder block against fluid flow past the shoulder;
• and
• wherein the second seal prevents flow of any fluid that has passed the first seal passing the second seal;
• wherein the sealing arrangement is mounted within a housing;
• and
• wherein the radial dimension of the shoulder is substantially the same as an inner radial dimension of the housing.