EXHIBIT 21

CIRCOR International, Inc.

SCHEDULE OF SUBSIDIARIES – As of 12/31/2020

I.Subsidiaries of CIRCOR International, Inc.:

1.CIRCOR, LLC, a Massachusetts Limited Liability Company

2.CIRCOR (Jersey) Ltd., a Jersey Company* (83% ownership)

3.CIRCOR Aerospace, Inc., a Delaware Corporation

4.CIRCOR Dutch Holdings B.V., a Netherlands Limited Liability Company

5.CIRCOR Energy, LLC., a Delaware Limited Liability Company*

6.CIRCOR Energy Products (Canada) ULC, an Alberta Unlimited Liability Company*

7.CIRCOR France SAS, a French Corporation*

8.CIRCOR German Holdings Management GmbH, a German Closed Corporation*

9.CIRCOR Holdings, Inc., a Delaware Corporation*

10.CIRCOR Luxembourg Holdings Sarl, a Luxembourg Limited Liability Company* (21.1524%)

11.CIRCOR Naval Solutions, LLC, a Delaware Limited Liability Company

12.CIRCOR Pipeline Engineering, LLC, a Delaware Limited Liability Company*

13.CIRCOR Precision Metering, LLC, a Delaware Limited Liability Company

14.CIRCOR Pumps North America, LLC, a Delaware Limited Liability Company

15.Downstream Holding, LLC, a Delaware Limited Liability Company*

16.Leslie Controls, Inc., a Delaware Corporation

17.Spence Engineering Company, Inc., a Delaware Corporation*

II.Subsidiaries of CIRCOR Aerospace, Inc.:

1.CIRCOR IP Holdings Co., a Delaware Corporation*

III.Subsidiaries of CIRCOR Energy, LLC:

1.CIRCOR Energy Products, LLC, an Oklahoma Limited Liability Company*

2.CIRCOR Mexico, S.A. de C.V., a Mexico Corporation* (99%)

3.CIRCOR Empleados de Mexico S.A. de C.V., a Mexico Corporation* (99%)

IV.Subsidiaries of CIRCOR Energy Products, LLC:

1.CIRCOR Mexico, S.A. de C.V., a Mexico Corporation (1%)

2.CIRCOR Empleados de Mexico S.A. de C.V., a Mexico Corporation* (1%)

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

a.CIRCOR German Holdings, LLC, a Delaware Limited Liability Company*

2.    CIRCOR Singapore Pte Ltd, a Singapore Private Limited 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.Allweiler GmbH, a Germany Corporation

2.Regeltechnik Kornwestheim GmbH, a German Corporation

3.SCHROEDAHL-ARAPP Spezialarmaturen GmbH & Co. KG, a German Corporation

VIII.Subsidiaries of CIRCOR Luxembourg Holdings, Sarl.:

1.CIRCOR do Brasil Particpaçöes LTDA, a Brazilian Corporation*

2.CIRCOR (Barbados) Holdings SARL, a Barbados Corporation*

3.CIRCOR India Holdings BV, a Netherlands Corporation*

4.CIRCOR Middle East FZE, a United Arab Emirates Corporation*

5.Howitzer Acquisition Limited, a United Kingdom Corporation*

IX.Subsidiaries of CIRCOR do Brasil Particpaçöes LTDA.:

1.    CIRCOR do Brasil Industria e Comercio LTDA, a wholly owned subsidiary of CIRCOR do Brasil Participacoes LTDA*

X.Subsidiaries of CIRCOR Energy Products (Canada) ULC, an Alberta Unlimited Liability Company:

a.Imo Industries (Canada) Inc., a Canadian Corporation*

b.CIRCOR Luxembourg Holdings Sarl, a Luxembourg Limited Liability Company* (78.8476%)

XI.Subsidiaries of Howitzer Acquisition Limited, a United Kingdom Corporation:

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

2.Pipeline Engineering & Supply Co., Limited, a United Kingdom Corporation

3.TapcoEnpro UK Limited, a United Kingdom Corporation*

XII.Subsidiaries of CIRCOR India Holdings BV, a Netherlands Corporation:

1.CIRCOR Flow Technologies India Private Ltd, an Indian Private Corporation

2.CIRCOR India LLC, a Delaware Limited Liability Company*

XIII.Subsidiaries of CIRCOR France, a French Corporation

1.CIRCOR Bodet SAS, a French Corporation*

2.CIRCOR Industria SAS, a French Corporation

3.CIRCOR Maroc SARL A.U., a Moroccan Corporation

XIV.Subsidiaries of Downstream Holding, LLC, a Delaware Limited Liability Company:

a.DeltaValve, LLC, a Delaware Limited Liability Company

b.TapcoEnpro, LLC, a Delaware Limited Liability Company

XV.Subsidiaries of CIRCOR Holdings, Inc.:

c.CIRCOR Netherlands Holdings B.V., a Netherlands Limited Liability Corporation

XVI.Subsidiaries of CIRCOR Netherlands Holdings B.V.

d.CIRCOR Valve Company, Ltd., a Chinese Foreign Owned Enterprise*

XVII.Subsidiaries of CIRCOR Dutch Holdings B.V.

e.Allweiler India Private Limited (formerly known as Tushaco Pumps Private Limited) (99.999%), an Indian Private Corporation

f.CIRCOR Netherlands II Holdings BV, a Netherlands Corporation

g.CIRCOR Pump (Weihai) Company Ltd., a Chinese Foreign Owned Enterprise*

h.Colfax Fluid Handling Middle East Ltd., an England/Wales Corporation*

XVIII.Subsidiaries of Netherlands II Holdings BV, a Netherlands Corporation:

1.Houttuin BV, a Netherlands Corporation*

2.SES-Rosscor Holding B.V., a Netherlands Corporation* (19.9%)

XIX.Subsidiaries of Allweiler GmbH

1.Allweiler A/S, a Norway Entity

2.Allweiler AlFarid Pumps Co. (28%), a United Arab Emirates Entity*

3.Allweiler Finland Oy AB, a Finland Entity*

4.CIRCOR Allweiler Imo SpA, a Italian Entity

5.CIRCOR Imo Allweiler, a France Entity*

6.IMO AB, a Sweden Entity

7.PD-Technik Ingenieurbüro GmbH, a German Entity

8.Rapid Allweiler Pumps & Engineering Company (Pty) Ltd. (35%), a South African Private Corporation

XX.Subsidiaries of CIRCOR Naval Solutions, LLC

1.CIRCOR Sub Holding, LLC, a Delaware Limited Liability Company

XXI.Subsidiaries of CIRCOR Sub Holding, LLC

1.CIRCOR Sub Ltd., a England / Wales Corporation

2.Portland Valve LLC, a Delaware Limited Liability Company

XXII.Subsidiaries of Hale Hamilton (Valves) Limited

1.CIRCOR Energy Gulf Arabia (75%), a United Arab Emirates Corporation

*Subsidiaries designated as Immaterial Subsidiaries