EXHIBIT 12

STATEMENT OF COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

(dollars in
thousands)



|                                                                                             |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|-------------------------------------------------------------------------------------------- |  | -------------------------- | ------- | - | -------------------------- | - | ------ | -------------------------- |  | - | -------------------------- | - |  | -------------------------- | ------ |  |  | - | ------ | 
|STANADYNE HOLDINGS, INC.                                                                     |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|                                                                                             |  | Year EndedDecember 31,2011 |         |   | Year EndedDecember 31,2010 |   |        | Year EndedDecember 31,2009 |  |   | Year EndedDecember 31,2008 |   |  | Year EndedDecember 31,2007 |       
|(Loss) income before taxes, extraordinary item and cumulative effect of change in accounting |  | $                          | (21,184 | ) |                            | $ | (9,948 | )                          |  | $ | (27,216                    | ) |  | $                          | 5,396  |  |  | $ | 8,979  | 
|Fixed charges deducted from earnings                                                         |  |                            | 32,314  |   |                            |   | 31,077 |                            |  |   | 29,956                     |   |  |                            | 29,228 |  |  |   | 28,890 | 
|                                                                                             |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Earnings available for payment of fixed charges                                              |  | $                          | 11,130  |   |                            | $ | 21,129 |                            |  | $ | 2,740                      |   |  | $                          | 34,624 |  |  | $ | 37,869 | 
|                                                                                             |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Fixed charges:                                                                               |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Interest expense                                                                             |  | $                          | 30,220  |   |                            | $ | 29,161 |                            |  | $ | 20,935                     |   |  | $                          | 16,735 |  |  | $ | 17,151 | 
|Amortization of deferred financing fees                                                      |  |                            | 1,788   |   |                            |   | 1,695  |                            |  |   | 8,791                      |   |  |                            | 12,217 |  |  |   | 10,994 | 
|Portion of rent deemed to be interest (Rent Expense 1/3)                                     |  |                            | 306     |   |                            |   | 221    |                            |  |   | 230                        |   |  |                            | 276    |  |  |   | 745    | 
|                                                                                             |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Total fixed charges                                                                          |  | $                          | 32,314  |   |                            | $ | 31,077 |                            |  | $ | 29,956                     |   |  | $                          | 29,228 |  |  | $ | 28,890 | 
|                                                                                             |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Ratio of earnings to fixed charges(1)                                                        |  |                            |        |   |                            |   |       |                            |  |   |                           |   |  |                            | 1.2    |  |  |   | 1.3    | 
|                                                                                             |  |                            |         |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 



|                                                                                             |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|-------------------------------------------------------------------------------------------- |  | -------------------------- | ------ | - | -------------------------- | - | ------ | -------------------------- |  | - | -------------------------- | - |  | -------------------------- | ------ |  |  | - | ------ | 
|STANADYNE CORPORATION                                                                        |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|                                                                                             |  | Year EndedDecember 31,2011 |        |   | Year EndedDecember 31,2010 |   |        | Year EndedDecember 31,2009 |  |   | Year EndedDecember 31,2008 |   |  | Year EndedDecember 31,2007 |       
|Income (loss) before taxes, extraordinary item and cumulative effect of change in accounting |  | $                          | (8,816 | ) |                            | $ | 2,371  |                            |  | $ | (15,404                    | ) |  | $                          | 15,913 |  |  | $ | 18,320 | 
|Fixed charges deducted from earnings                                                         |  |                            | 20,054 |   |                            |   | 18,816 |                            |  |   | 18,204                     |   |  |                            | 18,773 |  |  |   | 19,594 | 
|                                                                                             |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Earnings available for payment of fixed charges                                              |  | $                          | 11,238 |   |                            | $ | 21,187 |                            |  | $ | 2,800                      |   |  | $                          | 34,686 |  |  | $ | 37,914 | 
|                                                                                             |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Fixed charges:                                                                               |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Interest expense                                                                             |  | $                          | 18,221 |   |                            | $ | 17,161 |                            |  | $ | 16,402                     |   |  | $                          | 16,740 |  |  | $ | 17,164 | 
|Amortization of deferred financing fees                                                      |  |                            | 1,527  |   |                            |   | 1,434  |                            |  |   | 1,572                      |   |  |                            | 1,757  |  |  |   | 1,685  | 
|Portion of rent deemed to be interest (Rent Expense 1/3)                                     |  |                            | 306    |   |                            |   | 221    |                            |  |   | 230                        |   |  |                            | 276    |  |  |   | 745    | 
|                                                                                             |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Total fixed charges                                                                          |  | $                          | 20,054 |   |                            | $ | 18,816 |                            |  | $ | 18,204                     |   |  | $                          | 18,773 |  |  | $ | 19,594 | 
|                                                                                             |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 
|Ratio of earnings to fixed charges(1)                                                        |  |                            |       |   |                            |   | 1.1    |                            |  |   |                           |   |  |                            | 1.8    |  |  |   | 1.9    | 
|                                                                                             |  |                            |        |   |                            |   |        |                            |  |   |                            |   |  |                            |        |  |  |   |        | 



|(2) | The ratio of earnings to fixed charges is not presented for years that the ratio is less than 1.0. The deficiency of earnings at Stanadyne Holdings, Inc. was $21,184,
$9,948 and $27,216 during the years ended December 31, 2011, 2010 and 2009, respectively. The deficiency of earnings at Stanadyne Corporation was $8,816 and $15,404 during the years ended December 31, 2011 and 2009, respectively.
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