EXHIBIT 21

SCHEDULE OF SUBSIDIARIES

Subsidiaries of CIRCOR International, Inc.

I. Subsidiaries of Circor International, Inc.

1 Circor (Jersey) Ltd., a United Kingdom Company (80% ownership)

2 Circor Aerospace, Inc., a Delaware Corporation

3 CIRCOR Business Trust, a Massachusetts Business Trust

4 Circor Energy Products, Inc., an Oklahoma Corporation

5 Circor Luxembourg Holdings Sarl, a Luxembourg limited liability company (32%)

6 Circor, Inc., a Massachusetts Corporation

7 Dovianus B.V., a Netherlands Corporation

8 Industria S. A., a French limited liability company

9 Leslie Controls, Inc., a New Jersey Corporation

10 Patriot Holdings, Inc., a Nevada corporation

11 Sagebrush Pipeline Equipment Co., an Oklahoma Corporation

12 Spence Engineering Company, Inc., a Delaware Corporation

13 Texas Sampling Inc., a Texas Corporation

14 Circor Holdings, Inc., a Delaware Corporation

II. Subsidiaries of Circor Aerospace, Inc.:

1. CIRCOR IP Holding Co., a Delaware Corporation

2. Circor Instrumentation Technologies, Inc., a New York Corporation

3. Circor Luxembourg Holdings Sarl., a Luxembourg limited liability company (<1%)

4. Motor Technology, Inc., an Ohio Corporation

III. Subsidiaries of Circor Instrumentation Technologies, Inc.:

1. CIRCOR German Holdings Management GmbH, a German Closed Corporation

2. Circor (Jersey) Ltd., a United Kingdom Company (20% ownership)

3. Circor Instrumentation Ltd., a United Kingdom Company

4. Dopak Inc., a Texas Corporation

IV. Subsidiaries of Circor Energy Products, Inc.:

1. Circor Luxembourg Holdings Sarl., a Luxembourg limited liability company (approx. 68%)

V. Subsidiaries of Circor (Jersey), Ltd.:

1. Circor German Holdings, LLC, a Massachusetts Limited Liability Company

VI. Subsidiaries of Circor German Holdings, LLC:

1. Circor German Holdings GmbH & Co. KG , a German private company

VII. Subsidiaries of Circor German Holdings GmbH & Co. KG

1. Hoke Handelsgesellschaft GmbH, a German Corporation

2. Regeltechnik Kornwestheim GmbH, a German Closed Corporation

VIII. Subsidiaries of Regeltechnik Kornwestheim GmbH:

1. RTK Control Systems Limited, a United Kingdom Corporation

IX. Subsidiaries of Circor Business Trust:

1. Circor Securities Corp., a Massachusetts Corporation

X. Subsidiaries of Circor Luxembourg Holdings, Sarl.

1. CEP Holdings Sarl., a Luxembourg limited liability company (6% ownership)

2. Circor Energy Products (Canada) ULC, an Alberta unlimited liability company

3. Howitzer Acquisition Limited, a United Kingdom Corporation

XI. Subsidiaries of Circor Energy Products (Canada) ULC, an Alberta unlimited liability company

1. CEP Holdings Sarl., a Luxembourg limited liability Company ( 94% ownership)

XII. Subsidiaries of CEP Holdings, Sarl.

1. Pibiviesse Srl, an Italian Company

XIII. Subsidiaries of Pibiviesse Srl:

1. De Martin Giuseppe & Figli Srl, an Italian Company

2. Suzhou KF Valve Co., Ltd., a Chinese Foreign Owned Enterprise

XIV. Subsidiaries of Howitzer Acquisition Limited, a United Kingdom Corporation

1. Hale Hamilton (Valves) Limited, a United Kingdom Corporation

XV. Subsidiaries of Hale Hamilton (Valves) Limited, a United Kingdom Corporation

1. Cambridge Fluid Systems Limited, a United Kingdom Corporation

2. CFS Technology PTE Ltd, a Singapore limited Company