EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Graham Corporation
We consent to the incorporation by reference in Registration Statement No. 333-00401 and
Post-Effective Amendment No. 1 to Registration Statement No. 33-82432 on Forms S-3 and Registration
Statement Nos. 2-83432, 2-82265, and 333-113426 on Forms S-8 of our reports dated June 6, 2006,
relating to the consolidated financial statements and consolidated financial statement schedule of
Graham Corporation and subsidiaries appearing in this Annual Report on Form 10-K of Graham
Corporation and subsidiaries for the year ended March 31, 2006.
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/s/ Deloitte & Touche LLP |
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Deloitte & Touche LLP
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Rochester, New York |
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June 6, 2006 |
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