Flowserve PT Series Limitorque - Manual (Page 12)

Limitorque PT Series Worm Gear Operator FCD LMENIM2001-00 – 01/10
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Lubrication
Flowserve Limitorque PT operators are shipped with the following lubricants:
Table 3.1 – Lubricants
Product Lubricant Soap Base Temperature Range
PT 12, 14, 30, 40, 50, 75 Premium MC 2092SW Calcium -65ºF to 225ºF (-54ºC to 107ºC)
PT 60 Esso Unirex EP-2 Lithium -22ºF to 176ºF (-30ºC to 80ºC)
PT 65, 120 through 1000 Conoco Dynalife-L-EPO Lithium 0ºF to 225ºF (-18ºC to 107ºC)
nOTE: The lubricant should be checked every 18 months for manual operators.
a CaUTIOn: Do not add a different lubricant to a Flowserve Limitorque operator unless it is of the same soap base
as the existing lubricant, or you have received the approval of lubricant manufacturer.
Quantity
Limitorque operators are built to operate on the partial immersion principle. The primary concern regarding the amount
of lubricant is whether the “worm” is totally immersed in grease. This can be verified by the use of one or more of the
“fill” and “drain” plugs provided on the operator housing in most sizes.
Quality
When removing a “fill” or “drain” plug to inspect the lubricant level, remove a small amount and ensure that it is clean
and free of any contaminant including water. Should dirt, water, or other foreign matter be found, the operators should
be flushed with a commercial degreaser/cleaner like Exxon VARSOL #1 or #3, which is non-corrosive and does not
affect seal materials such as Buna-N or Viton. Repack operator with fresh lubricant.
Consistency
The main gear box lubricant should be slightly fluid, approximating a standard NLGI-0 grade consistency or less.
Alternate lubricants may be used in place of the standard lubricants supplied by Flowserve provided they are of a
formulation similar to those listed above for the respective product.