UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13G/A
                                (Amendment No. 3)

                    Under the Securities Exchange Act of 1934
                                 (Rule 13d-102)

                 Information to be Included in Statements Filed
          Pursuant to Rule 13d-1(b)(c), and (d) and Amendments thereto
                         Filed Pursuant to Rule 13d-2(b)


                                NATCO GROUP, INC.
             -----------------------------------------------------
                                (Name of Issuer)


                     Common Stock, par value $0.01 per share
             -----------------------------------------------------
                         (Title of Class of Securities)


                                   63227W 20 3
                  --------------------------------------------
                                 (CUSIP Number)


                                December 31, 2006
             -----------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


         Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

         [ ] Rule 13d-1(b)

         [ ] Rule 13d-1(c)

         [X] Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


--------------------------------------------------------------------------------
1.   Names of Reporting Persons.
     1. I.R.S. Identification Nos. of above persons (entities only).

     Capricorn Holdings, Inc.
--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions)
                                                                         (a) [ ]
                                                               .         (b) [X]
--------------------------------------------------------------------------------
3.   SEC Use Only
--------------------------------------------------------------------------------
4.   Citizenship or Place of Organization

     Connecticut
--------------------------------------------------------------------------------
Number of Shares             5.   Sole Voting Power          0
Beneficially Owned           ---------------------------------------------------
by Each Reporting            6.   Shared Voting Power        710,285
Person With:                 ---------------------------------------------------
                             7.   Sole Dispositive Power     0
                             ---------------------------------------------------
                             8.   Shared Dispositive Power   710,285
--------------------------------------------------------------------------------
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     710,285
--------------------------------------------------------------------------------
10.  Check box if the Aggregate Amount in Row (9) Excludes Certain Shares
     (See Instructions)
                                                                             [ ]
--------------------------------------------------------------------------------
11.  Percent of Class Represented by Amount in Row (9)

     4.1%
--------------------------------------------------------------------------------
12.  Type of Reporting Person (See Instructions)

     CO
--------------------------------------------------------------------------------

                                       2


--------------------------------------------------------------------------------
1.   Names of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     Winokur Family Investors, LLC
--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions)
                                                                         (a) [ ]
                                                               .         (b) [X]
--------------------------------------------------------------------------------
3.   SEC Use Only
--------------------------------------------------------------------------------
4.   Citizenship or Place of Organization

     Connecticut
--------------------------------------------------------------------------------
Number of Shares             5.   Sole Voting Power          0
Beneficially Owned           ---------------------------------------------------
by Each Reporting            6.   Shared Voting Power        180,287
Person With:                 ---------------------------------------------------
                             7.   Sole Dispositive Power     0
                             ---------------------------------------------------
                             8.   Shared Dispositive Power   180,287
--------------------------------------------------------------------------------
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     180,287
--------------------------------------------------------------------------------
10.  Check box if the Aggregate Amount in Row (9) Excludes Certain Shares
     (See Instructions)
                                                                             [ ]
--------------------------------------------------------------------------------
11.  Percent of Class Represented by Amount in Row (9)

     1.04%
--------------------------------------------------------------------------------
12.  Type of Reporting Person (See Instructions)

     CO
--------------------------------------------------------------------------------

                                       3


--------------------------------------------------------------------------------
1.   Names of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     HERBERT S. WINOKUR, JR.
--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions)
                                                                         (a) [ ]
                                                               .         (b) [X]
--------------------------------------------------------------------------------
3.   SEC Use Only
--------------------------------------------------------------------------------
4.   Citizenship or Place of Organization

     USA
--------------------------------------------------------------------------------
Number of Shares             5.   Sole Voting Power          919,500
Beneficially Owned           ---------------------------------------------------
by Each Reporting            6.   Shared Voting Power        0
Person With:                 ---------------------------------------------------
                             7.   Sole Dispositive Power     919,500
                             ---------------------------------------------------
                             8.   Shared Dispositive Power   0
--------------------------------------------------------------------------------
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     919,500
--------------------------------------------------------------------------------
10.  Check box if the Aggregate Amount in Row (9) Excludes Certain Shares
     (See Instructions)
                                                                             [ ]
--------------------------------------------------------------------------------
11.  Percent of Class Represented by Amount in Row (9)

     5.30%
--------------------------------------------------------------------------------
12.  Type of Reporting Person (See Instructions)

     IN
--------------------------------------------------------------------------------

                                       4


1.
         (a)      Name of Issuer:
                  --------------

                  NATCO Group, Inc.

                  Address of Issuer's Principal Executive Offices:
                  -----------------------------------------------

                  2950 North Loop West
                  7th Floor
                  Houston, TX 77092

2.
         (a)      Name of Person Filing:
                  ---------------------

                  Capricorn Holdings, Inc.
                  Winokur Family Investors, LLC
                  Herbert S. Winokur, Jr.

         (b)      Address of Principal Business Office or, if none, Residence:
                  -----------------------------------------------------------

                  The principal business office of all of the filing parties is
                  30 East Elm Street, Greenwich, CT 06830.

         (c)      Citizenship:
                  -----------

                  Capricorn Holdings, Inc. is a Delaware corporation.

                  Winokur Family Investors, LLC is a Connecticut limited
                  liability company.

                  Herbert S. Winokur, Jr. is a citizen of the United States.

         (d)      Title of Class of Securities (of Issuer):
                  ----------------------------------------

                  Common Stock, par value $0.01 per share.

         (e)      CUSIP Number:
                  ------------

                  63227W 20 3

3.       If this statement is filed pursuant to ss.ss. 240. 13d-1(b) or 240.
         13d-2(b) or (c), check whether the person filing is a:

         NOT APPLICABLE

4.       Ownership

         (a)      Amount Beneficially Owned: 919,500 (See Exhibit 1)
                  -------------------------

         (b)      Percent of Class:
                  ----------------

                  The 919,500 shares beneficially owned by Mr. Winokur represent
                  5.30% of the outstanding shares of Common Stock. Percentage
                  ownership of the Common Stock is based on 17,323,147 shares of
                  Common Stock, which represents the number of outstanding
                  shares of Common Stock as of September 30, 2006, as stated on
                  the Form 10-Q of NATCO Group Inc. for the period ended
                  September 30, 2006

                                       5


         (c)      Number of shares as to which such person has:
                  --------------------------------------------

                  (i)      Sole power to vote or direct the vote: 919,500

                  (ii)     Shared power to vote or direct the vote: 0

                  (iii)    Sole power to dispose or to direct the disposition
                           of: 919,500

                  (iv)     Shared power to dispose or direct the disposition of:
                           0

5.       Ownership of Five Percent or Less of a Class:

         See Exhibit 1.

6.       Ownership of More than Five Percent on Behalf of Another Person:

         NOT APPLICABLE

7.       Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company:

         See Exhibit 1.

8.       Identification and Classification of Members of the Group:

         NOT APPLICABLE

9.       Notice of Dissolution of Group:

         NOT APPLICABLE

10.      Certification:

         NOT APPLICABLE


                                        6


                                    SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date: January 18, 2007


                                       CAPRICORN HOLDINGS, INC.

                                       By: /s/ HERBERT S. WINOKUR JR.
                                           -------------------------------------
                                           Name:  Herbert S. Winokur, Jr.
                                           Title: President



                                       WINOKUR FAMILY INVESTORS, LLC

                                       By: /s/ HERBERT S. WINOKUR JR.
                                           -------------------------------------
                                           Name:  Herbert S. Winokur, Jr.
                                           Title: Managing Member



                                       By: /s/ HERBERT S. WINOKUR JR.
                                           -------------------------------------
                                           Herbert S. Winokur, Jr.


                                       7


                                    EXHIBIT 1
                                    ---------

This Schedule 13G (Amendment No. 3) is being filed by Capricorn Holdings, Inc.,
a Delaware corporation ("Holdings Inc."), Winokur Family Investors, LLC ("WFI"),
a Connecticut limited liability company and Herbert S. Winokur, Jr. ("Mr.
Winokur") (collectively, the "Filing Parties"). Of the 919,500 shares reported
as beneficially owned by Mr. Winokur and the other Filing Parties, 710,285
shares are owned directly by Holdings Inc., 180,287 shares are directly owned by
WFI, of which Mr. Winokur is an owner, and 28,928 shares are owned directly by
Mr. Winokur. As the manager of WFI and the sole stockholder of Holdings Inc.,
Mr. Winokur may be deemed to control each of them and, in such capacities,
possesses voting and dispositive power over the shares held by WFI and Holdings
Inc. Accordingly, Mr. Winokur may be deemed the beneficial owner of all of the
shares reported as beneficially owned by the Filing Parties. A joint filing
agreement among the Filing Parties is filed as Exhibit 2.



                                       8


                                    EXHIBIT 2
                                    ---------

                             JOINT FILING AGREEMENT
                                      AMONG
             CAPRICORN HOLDINGS, INC., WINOKUR FAMILY INVESTORS, LLC
                                       AND
                             HERBERT S. WINOKUR, JR.

The undersigned hereby agree that the Schedule 13G/A with respect to the common
stock without par value of NATCO Group, Inc. (the "Schedule 13G/A") is, and any
amendments thereto executed by each of us shall be, filed on behalf of us
pursuant to and in accordance with the provisions of Rule 13d-1(k)(1) under the
Securities Exchange Act of 1934, as amended. Each of the undersigned agrees to
be responsible for the timely filing of the Schedule 13G/A and any amendments
thereto, and for the completeness and accuracy of the information concerning
itself contained therein.

Dated: January 18, 2007


                                       CAPRICORN HOLDINGS, INC.

                                       By: /s/ HERBERT S. WINOKUR JR.
                                           -------------------------------------
                                           Name:  Herbert S. Winokur, Jr.
                                           Title: President



                                       WINOKUR FAMILY INVESTORS, LLC

                                       By: /s/ HERBERT S. WINOKUR JR.
                                           -------------------------------------
                                           Name:  Herbert S. Winokur, Jr.
                                           Title: Managing Member



                                       By: /s/ HERBERT S. WINOKUR JR.
                                           -------------------------------------
                                           Herbert S. Winokur, Jr.


                                       9