<SEC-DOCUMENT>0000897069-17-000109-index.html : 20170214
<SEC-HEADER>0000897069-17-000109.hdr.sgml : 20170214
<ACCEPTANCE-DATETIME>20170214143656
ACCESSION NUMBER:		0000897069-17-000109
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20170214
DATE AS OF CHANGE:		20170214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFRI INC
		CENTRAL INDEX KEY:			0000914122
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFYING EQUIP [3564]
		IRS NUMBER:				363922969
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0131

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-43197
		FILM NUMBER:		17607231

	BUSINESS ADDRESS:	
		STREET 1:		6410 WEST HOWARD STREET
		CITY:			NILES
		STATE:			IL
		ZIP:			60714
		BUSINESS PHONE:		8479661000

	MAIL ADDRESS:	
		STREET 1:		6410 WEST HOWARD STREET
		CITY:			NILES
		STATE:			IL
		ZIP:			60714

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MIDWESCO FILTER RESOURCES INC
		DATE OF NAME CHANGE:	19970402

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PERRITT CAPITAL MANAGEMENT INC
		CENTRAL INDEX KEY:			0001279342
		IRS NUMBER:				363538658
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		300 SOUTH WACKER DRIVE
		STREET 2:		SUITE 2880
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3126691650

	MAIL ADDRESS:	
		STREET 1:		300 SOUTH WACKER DRIVE
		STREET 2:		SUITE 2880
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>cg874.htm
<TEXT>
Document 1 - file: cg874.htm

</DOCUMENT>
</SEC-DOCUMENT>