FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * BLOSS DAVID A SR   2. Issuer Name and Ticker or Trading Symbol CIRCOR INTERNATIONAL INC [CIR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman, President & CEO (Last) (First) (Middle) C/O CIRCOR INTERNATIONAL, INC., 25 CORPORATE DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 03/16/2006 (Street) BURLINGTON, MA 01803 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/16/2006   M(1)   15,520 A $ 9.45 (1) 59,553 D   Common Stock 03/16/2006   F(1)   6,255 D $ 28.45 (2) 53,298 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Units

$ 9.45 (1)

03/16/2006

M(1)

15,520

03/16/2006(1)

(1)

Common Stock

15,520

(1)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BLOSS DAVID A SR C/O CIRCOR INTERNATIONAL, INC. 25 CORPORATE DRIVE BURLINGTON, MA 01803	X		Chairman, President & CEO

Signatures

Alan J. Glass, Attorney-in-Fact		03/17/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Shares acquired pursuant to conversion of Restricted Stock Units (RSUs) on a one-for-one basis. RSUs issued pursuant to Management Stock Purchase Plan under which executive may make an advance election to receive RSUs in lieu of specified percentage or dollar amount of annual incentive cash bonus under bonus plan applicable to executive. RSUs are issued in whole units on teh basis of a 33% discount from the fair market value of the issuer's common stock on teh date the underlying bonus is determined ($9.45 in this case) and generally vest 3 years from the date of the grant, at which time they convert into shares of common stock unless the executive has previously selected a longer deferral period. Transactions reported reflect conversion of RSUs into shares and withholding of sufficient shares to pay taxes.
(2)	Fair market value of shares, based on closing price of issuer's stock on March 15, 2006 is $28.45.

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