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 * CLARKE JOHN U   2. Issuer Name and Ticker or Trading Symbol NATCO GROUP INC [NTG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) 2950 N. LOOP WEST, SUITE 700 3. Date of Earliest Transaction (Month/Day/Year) 06/22/2006 (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 - restricted stock (1) 06/22/2006   A   8,800 A $ 37.785 179,240 D (2)

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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

$ 37.785

06/22/2006

A

15,525

(3)

06/22/2016

Common stock

15,525

$ 0

15,525

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CLARKE JOHN U 2950 N. LOOP WEST SUITE 700 HOUSTON, TX 77092	X		Chief Executive Officer

Signatures

John U. Clarke		06/26/2006
**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)	Restrictions on this grant of restricted stock lapse (1) as to all of the shares on August 15, 2009, provided that the Company has achieved an earnings per share of at least $2.25 calculated on a trailing twelve months basis as of the last day of a quarter, for three consecturive quarters and that (i) earnings per share may be normalized in certain circumstances and (ii) the recipient has continuously served as an employee from the date of the award until such date or (b) if earlier, pursuant to the 2001 stock incentive plan or upon the occurrence of a Corporate Change as defined in such plan, subject to the recipient having been continuously employed by the Company or a subsidiary on such date or the date of such Corporate Change, as applicable. The shares are subject to forfeiture upon termination of employment prior to the time restirctions lapse or if the performance restrictions are not met on or before August 15, 2009.
(2)	Direct ownership includes an aggregate of 30,800 shares of restricted stock subject to performance-based restrictions, including the shares reported in this transaction.
(3)	Stock options vest in 1/3 increments on the first, second and third anniversaries of the date of grant, subject to continued emploument by the Company or a subsidiary on the applicable date. The first third will vest on June 22, 2007.

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