Flowserve Circpac MD - Manual (Page 7)

7
3 Seal Installation (Non-split Housing Designs)
3.1 Circpac MD seals with non-split housings are pre-assembled at the factory for
cartridge installation. Unless otherwise indicated on the seal assembly drawing, an
installation plug is installed in the seal bore to guide the rings onto the equipment
shaft during installation. If no installation plug is used, the shaft/sleeve end must
have a smooth, 30 degree by 3.2 mm (0.125”) lead-in chamfer to ramp the rings onto
the shaft.
3.2 Check that the housing gasket is properly installed at the face of the housing.
3.3 Carefully slide the housing assembly onto the shaft. The installation plug should be
displaced by the shaft and fall away once the last ring has mounted the shaft.
3.4 Center the housing assembly on the shaft as required.
3.5 Evenly tighten the housing to the equipment until the face gasket is fully compressed
and the housing is squarely seated. Torque housing bolts to 34 N-m (25 ft-lbs)
minimum.
3.6 Remove centering devices, if applicable.
3.7 Connect piping if required.
4 Operational Recommendations
For dual seals, barrier pressure and other controls should be energized prior to starting the
equipment or introducing product. Likewise, do not remove pressure or controls until the
equipment has been fully shut down and vented.
The Circpac MD is designed to operate with clean air or nitrogen barrier gas. Check seal
assembly drawing for recommended barrier pressure setting.
For special problems encountered during installation, contact your nearest Flowserve Sales
and Service Representative or Authorized Distributor.
5 Repairs
This product is a precision sealing device. The design and dimension tolerances are critical
to seal performance. Only parts supplied by Flowserve should be used to repair a seal. To
order replacement parts, refer to the part code and B/M number. A spare backup seal
should be stocked to reduce repair time.
When seals are returned to Flowserve for repair, decontaminate the seal assembly and
include an order marked "Repair or Replace." A signed certificate of decontamination
must be attached. A Material Safety Data Sheet (MSDS) must be enclosed for any
product that came in contact with the seal. The seal assembly will be inspected and, if
repairable, it will be rebuilt, tested, and returned.