Mechanical seal with bellows seating alignment

1. A mechanical seal comprising:

a stationary ring;

a runner adjacent the stationary ring;

an elastomer bellows adjacent the runner;

a spring retainer plate;

a spacer positioned between the elastomer bellows and the spring retainer plate;

a bellows housing; and

a spring captured between the bellows housing and the spring retainer plate.

2. The mechanical seal of claim 1 , further comprising:

a retaining ring; and

a shim located between the retaining ring and the spring retainer plate.

3. A pumping system comprising:

a motor assembly;

a pump assembly driven by the motor assembly;

a seal section positioned between the pump assembly and the motor assembly, wherein the seal section includes:

a mechanical seal having a stationary ring, a runner adjacent the stationary ring, an elastomer bellows adjacent the runner, a spring retainer plate and a spacer positioned between the elastomer bellows and the spring retainer plate;

a bellows housing; and

a spring captured between the bellows housing and the spring retainer plate.

4. The pumping system of claim 3 , wherein the mechanical seal further includes:

a retaining ring; and

a shim located between the retaining ring and the spring retainer plate.

5. A seal section for use in a downhole pumping system, the seal section comprising:

a mechanical seal having a stationary ring, a runner adjacent to the stationary ring, an elastomer bellows adjacent to the runner, a spring retainer plate and a spacer positioned between the elastomer bellows and the spring retainer plate;

a bellows housing;

a spring captured between the bellows housing and the spring retainer plate;

a thrust bearing; and

an elastomeric bag.

6. The seal section of claim 5 wherein the mechanical seal further includes:

a retaining ring; and

a shim located between the retaining ring and the spring retainer plate.