Ownership Submission
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 *
CURCIO ROBERT A
   2. Issuer Name and Ticker or Trading Symbol
NATCO GROUP INC [NTG] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Senior Vice President
(Last)
(First)
(Middle)
C/O NATCO GROUP INC., 2950 NORTH LOOP WEST, SUITE 700		 3. Date of Earliest Transaction (Month/Day/Year)
06/29/2006
(Street)

HOUSTON, TX 77092		 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 06/29/2006   M   40,000 A $ 8.81 54,423 D  
Common stock 06/29/2006   M   26,667 A $ 10 81,090 D  
Common stock 06/29/2006   M   15,000 A $ 12.91 96,090 D  
Common stock 06/29/2006   M   13,350 A $ 6.27 109,440 D  
Common stock 06/29/2006   M   3,467 A $ 8.055 112,907 D  
Common stock 06/29/2006   S   100 D $ 40.17 112,807 D  
Common stock 06/29/2006   S   2,500 D $ 39.75 110,307 D  
Common stock 06/29/2006   S   200 D $ 40.12 110,107 D  
Common stock 06/29/2006   S   500 D $ 40.1 109,607 D  
Common stock 06/29/2006   S   300 D $ 40.08 109,307 D  
Common stock 06/29/2006   S   6,400 D $ 40.07 102,907 D  
Common stock 06/29/2006   S   2,900 D $ 40 100,007 D  
Common stock 06/29/2006   S   3,000 D $ 39.99 97,007 D  
Common stock 06/29/2006   S   7,300 D $ 39.98 89,707 D  
Common stock 06/29/2006   S   2,800 D $ 39.97 86,907 D  
Common stock 06/29/2006   S   27,200 D $ 39.95 59,707 D  
Common stock 06/29/2006   S   6,100 D $ 39.94 53,607 D  
Common stock 06/29/2006   S   1,400 D $ 39.93 52,207 D  
Common stock 06/29/2006   S   1,500 D $ 39.92 50,707 D  
Common stock 06/29/2006   S   2,100 D $ 39.91 48,607 D  
Common stock 06/29/2006   S   4,000 D $ 39.9 44,607 D  
Common stock 06/29/2006   S   2,200 D $ 39.89 42,407 D  
Common stock 06/29/2006   S   5,100 D $ 39.88 37,307 D  
Common stock 06/29/2006   S   1,100 D $ 39.87 36,207 D  
Common stock 06/29/2006   S   1,100 D $ 39.86 35,107 D  
Common stock 06/29/2006   S   1,100 D $ 39.85 34,007 D  
Common stock 06/29/2006   S   1,684 D $ 39.84 32,323 D  
Common stock 06/29/2006   S   700 D $ 39.83 31,623 D  
Common stock 06/29/2006   S   300 D $ 39.82 31,323 D  
Common stock 06/29/2006   S   900 D $ 39.81 30,423 D  

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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
Stock option (right to buy) $ 8.81 06/29/2006   M   40,000   06/30/1999(1) 06/30/2008 common stock 40,000 $ 0 0 D  
Stock option (right to buy) $ 10 06/29/2006   M   26,667   01/01/2001(1) 01/01/2010 common stock 26,667 $ 0 0 D  
Stock option (right to buy) $ 12.91 06/29/2006   M   15,000   05/25/2002(1) 05/25/2011 common stock 15,000 $ 0 0 D  
Stock option (right to buy) $ 6.27 06/29/2006   M   13,350   12/07/2002(1) 12/07/2011 common stock 13,350 $ 0 0 D  
Stock option (right to buy) $ 8.055 06/29/2006   M   3,467   09/09/2005(2) 09/09/2014 common stock 10,400 $ 0 6,933 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
CURCIO ROBERT A
C/O NATCO GROUP INC.
2950 NORTH LOOP WEST, SUITE 700
HOUSTON, TX 77092		       Senior Vice President  

Signatures

 Robert A. Curcio   06/30/2006
**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) Options vested in one-quarter increments on thr first through fourth anniversaries of the date of grant. Date exercisable given is the date of the first such anniversary for such option. The number indicated represents all of the granted and vested options in the grant.
(2) Options vested in one-thirdincrements on thr first through thirdanniversaries of the date of grant. Date exercisable given is the date of the first such anniversary for such option. The number exercised represents all of the currently vested options in the grant.
 
Remarks:
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