Enclosure Purging & Pressurization Solutions | Best Purging Systems Corporation

America's Best UL Listed NFPA 496 Type Y & Z Electrical Enclosure Purging & Pressurization Systems

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Purging & Pressurization Unit Cross-Over Guide
for Directly Compatible Replacement

Model 1001A, Model 1001B Model 1001C, Model 1002, Model 1003 & Model 1004 NFPA 496 UL Listed Best Purging and Pressurization Units Compatability Guide

We're honored to be your primary source for enclosure purging and pressurization units, and pledge to offer the most
exceptional quality, service and sales advantages.

Please open the drop-down charts below each Model to see
the Model Numbers of Units from other Manufactures
they can easily replace.

In addition, feel free to contact us for more
information regarding your specific needs.

Get the Best Solution here!

Applications	Configurations
Class I Areas Enclosures Volume not exceeding 2 Cubic Feet Class II Areas Enclosures Volume not exceeding 10 Cubic Feet	Universal Mount (excluding pressure switch) Left, Right, Top, Bottom or Panel Mounting
	Horizontal Mount (including pressure switch) Top or Bottom Mounting	Vertical Mount (including pressure switch) Left or Right Mounting

Best Purging Systems Corporation	Pepperl+Fuchs Bebco EPS^® (circa 2003-Present Day)	Bebco Industries EPS Division (circa 1990-2003)	Bebco Industries EPS Division (circa 1985-1989)	D & M Instruments (circa 2003-2013)
Model YZ101A-CI/CII-L-U Type Y & Z Universal Mount Enclosure Pressurization Unit (less pressure switch)	Model 1001A-LPS-CI-YZ-LH Model 1001A-LPS-CI-YZ-RH Model 1001A-LPS-CI-YZ-TM Model 1001A-LPS-CI-YZ-BM Model 1001A-LPS-CI-YZ-PM Model 1001A-LPS-CII-YZ-LH Model 1001A-LPS-CII-YZ-RH Model 1001A-LPS-CII-YZ-TM Model 1001A-LPS-CII-YZ-BM Model 1001A-LPS-CII-YZ-PM		Model 101A-LPS-CI-YZ-LH Model 101A-LPS-CI-YZ-RH Model 101A-LPS-CI-YZ-TM Model 101A-LPS-CI-YZ-BM Model 101A-LPS-CI-YZ-PM Model 101A-LPS-CII-YZ-LH Model 101A-LPS-CII-YZ-RH Model 101A-LPS-CII-YZ-TM Model 101A-LPS-CII-YZ-BM Model 101A-LPS-CII-YZ-PM	Model YZ-101-CI/CII-L-U
Model YZ101A-CI/CII-W-H Type Y & Z Horizontal Mount Enclosure Pressurization Unit (with pressure switch)	Model 1001A-WPS-CI-YZ-TM Model 1001A-WPS-CI-YZ-BM Model 1001A-WPS-CII-YZ-TM Model 1001A-WPS-CII-YZ-BM		Model 101A-WPS-CI-YZ-TM Model 101A-WPS-CI-YZ-BM Model 101A-WPS-CII-YZ-TM Model 101A-WPS-CII-YZ-BM	Model YZ-101-CI/CII-W-H
Model YZ101A-CI/CII-W-V Type Y & Z Vertical Mount Enclosure Pressurization Unit (with pressure switch)	Model 1001A-WPS-CI-YZ-LH Model 1001A-WPS-CI-YZ-RH Model 1001A-WPS-CII-YZ-LH Model 1001A-WPS-CII-YZ-RH		Model 101A-WPS-CI-YZ-LH Model 101A-WPS-CI-YZ-RH Model 101A-WPS-CII-YZ-LH Model 101A-WPS-CII-YZ-RH	Model YZ-101-CI/CII-W-V
Group B, C & D Pressure Switch Options
-24 (24 VDC), -120 (120 VAC) or -240 (240 VAC) added as last segment to Horizontal or Vertical Mount Unit Model Numbers to feature Group B, C & D rated Pressure Switches Example: YZ101A-CI/CII-W-H-24	"WPS" replaced by "WPSA" to feature Group B, C & D rated Pressure Switch, and -24VDC, -120VAC or -240VAC added as last segment to indicate Powered Contact Voltage Example: 1001A-WPSA-CI-YZ-TM-24VDC		Group B, C & D rated Pressure Switches were not available while these Products were manufactured	"W" replaced by "B" to feature Group B, C & D rated 120 VAC Pressure Switch on Models with W-H and W-V suffixes Example: YZ-101-CI/CII-B-V
Highlighted fields indicate Products that are discontinued or no longer manufactured

Applications	Configurations
Class II Areas Enclosures Volume not exceeding 50 Cubic Feet	Universal Mount (excluding pressure switch) Left, Right, Top, Bottom or Panel Mounting
	Horizontal Mount (including pressure switch) Top or Bottom Mounting	Vertical Mount (including pressure switch) Left or Right Mounting

Best Purging Systems Corporation	Pepperl+Fuchs Bebco EPS^® (circa 2003-Present Day)	Bebco Industries EPS Division (circa 1990-2003)	Bebco Industries EPS Division (circa 1985-1989)	D & M Instruments (circa 2003-2013)
Model YZ101B-CI/CII-L-U Type Y & Z Universal Mount Enclosure Pressurization Unit (less pressure switch)	Model 1001B-LPS-CI-YZ-LH Model 1001B-LPS-CI-YZ-RH Model 1001B-LPS-CI-YZ-TM Model 1001B-LPS-CI-YZ-BM Model 1001B-LPS-CI-YZ-PM Model 1001B-LPS-CII-YZ-LH Model 1001B-LPS-CII-YZ-RH Model 1001B-LPS-CII-YZ-TM Model 1001B-LPS-CII-YZ-BM Model 1001B-LPS-CII-YZ-PM		Model 101B-LPS-CI-YZ-LH Model 101B-LPS-CI-YZ-RH Model 101B-LPS-CI-YZ-TM Model 101B-LPS-CI-YZ-BM Model 101B-LPS-CI-YZ-PM Model 101B-LPS-CII-YZ-LH Model 101B-LPS-CII-YZ-RH Model 101B-LPS-CII-YZ-TM Model 101B-LPS-CII-YZ-BM Model 101B-LPS-CII-YZ-PM	Model YZ-101-CI/CII-L-U
Model YZ101B-CI/CII-W-H Type Y & Z Horizontal Mount Enclosure Pressurization Unit (with pressure switch)	Model 1001B-WPS-CI-YZ-TM Model 1001B-WPS-CI-YZ-BM Model 1001B-WPS-CII-YZ-TM Model 1001B-WPS-CII-YZ-BM		Model 101B-WPS-CI-YZ-TM Model 101B-WPS-CI-YZ-BM Model 101B-WPS-CII-YZ-TM Model 101B-WPS-CII-YZ-BM	Model YZ-101-CI/CII-W-H
Model YZ101B-CI/CII-W-V Type Y & Z Vertical Mount Enclosure Pressurization Unit (with pressure switch)	Model 1001B-WPS-CI-YZ-LH Model 1001B-WPS-CI-YZ-RH Model 1001B-WPS-CII-YZ-LH Model 1001B-WPS-CII-YZ-RH		Model 101B-WPS-CI-YZ-LH Model 101B-WPS-CI-YZ-RH Model 101B-WPS-CII-YZ-LH Model 101B-WPS-CII-YZ-RH	Model YZ-101-CI/CII-W-V
Highlighted fields indicate Products that are discontinued or no longer manufactured

Applications	Configurations
Class II Areas Enclosures Volume not exceeding 250 Cubic Feet	Universal Mount (excluding pressure switch) Left, Right, Top, Bottom or Panel Mounting
	Horizontal Mount (including pressure switch) Top or Bottom Mounting	Vertical Mount (including pressure switch) Left or Right Mounting

Best Purging Systems Corporation	Pepperl+Fuchs Bebco EPS^® (circa 2003-Present Day)	Bebco Industries EPS Division (circa 1990-2003)	Bebco Industries EPS Division (circa 1985-1989)	D & M Instruments (circa 2003-2013)
Model YZ101C-CI/CII-L-U Type Y & Z Universal Mount Enclosure Pressurization Unit (less pressure switch)	Model 1001C-LPS-CI-YZ-LH Model 1001C-LPS-CI-YZ-RH Model 1001C-LPS-CI-YZ-TM Model 1001C-LPS-CI-YZ-BM Model 1001C-LPS-CI-YZ-PM Model 1001C-LPS-CII-YZ-LH Model 1001C-LPS-CII-YZ-RH Model 1001C-LPS-CII-YZ-TM Model 1001C-LPS-CII-YZ-BM Model 1001C-LPS-CII-YZ-PM		Model 101C-LPS-CI-YZ-LH Model 101C-LPS-CI-YZ-RH Model 101C-LPS-CI-YZ-TM Model 101C-LPS-CI-YZ-BM Model 101C-LPS-CI-YZ-PM Model 101C-LPS-CII-YZ-LH Model 101C-LPS-CII-YZ-RH Model 101C-LPS-CII-YZ-TM Model 101C-LPS-CII-YZ-BM Model 101C-LPS-CII-YZ-PM	n/a
Model YZ101C-CI/CII-W-H Type Y & Z Horizontal Mount Enclosure Pressurization Unit (with pressure switch)	Model 1001C-WPS-CI-YZ-TM Model 1001C-WPS-CI-YZ-BM Model 1001C-WPS-CII-YZ-TM Model 1001C-WPS-CII-YZ-BM		Model 101C-WPS-CI-YZ-TM Model 101C-WPS-CI-YZ-BM Model 101C-WPS-CII-YZ-TM Model 101C-WPS-CII-YZ-BM	n/a
Model YZ101C-CI/CII-W-V Type Y & Z Vertical Mount Enclosure Pressurization Unit (with pressure switch)	Model 1001C-WPS-CI-YZ-LH Model 1001C-WPS-CI-YZ-RH Model 1001C-WPS-CII-YZ-LH Model 1001C-WPS-CII-YZ-RH		Model 101C-WPS-CI-YZ-LH Model 101C-WPS-CI-YZ-RH Model 101C-WPS-CII-YZ-LH Model 101C-WPS-CII-YZ-RH	n/a
Highlighted fields indicate Products that are discontinued, not available or no longer manufactured

Applications	Configurations
Class I Areas Enclosures Volume not exceeding 15 Cubic Feet	Universal Mount (excluding pressure switch) Left, Right, Top, Bottom or Panel Mounting
	Horizontal Mount (including pressure switch) Top or Bottom Mounting	Vertical Mount (including pressure switch) Left or Right Mounting

Best Purging Systems Corporation	Pepperl+Fuchs Bebco EPS^® (circa 2003-Present Day)	Bebco Industries EPS Division (circa 1990-2003)	Bebco Industries EPS Division (circa 1985-1989)	D & M Instruments (circa 2003-2013)
Model YZ102-CI/CII-L-U Type Y & Z Universal Mount Enclosure Pressurization Unit (less pressure switch)	Model 1002-LPS-CI-YZ-LH Model 1002-LPS-CI-YZ-RH Model 1002-LPS-CI-YZ-TM Model 1002-LPS-CI-YZ-BM Model 1002-LPS-CI-YZ-PM Model 1002-LPS-CII-YZ-LH Model 1002-LPS-CII-YZ-RH Model 1002-LPS-CII-YZ-TM Model 1002-LPS-CII-YZ-BM Model 1002-LPS-CII-YZ-PM		Model 102-LPS-CI-YZ-LH Model 102-LPS-CI-YZ-RH Model 102-LPS-CI-YZ-TM Model 102-LPS-CI-YZ-BM Model 102-LPS-CI-YZ-PM Model 102-LPS-CII-YZ-LH Model 102-LPS-CII-YZ-RH Model 102-LPS-CII-YZ-TM Model 102-LPS-CII-YZ-BM Model 102-LPS-CII-YZ-PM	Model YZ-103-CI/CII-L-U
Model YZ102-CI/CII-W-H Type Y & Z Horizontal Mount Enclosure Pressurization Unit (with pressure switch)	Model 1002-WPS-CI-YZ-TM Model 1002-WPS-CI-YZ-BM Model 1002-WPS-CII-YZ-TM Model 1002-WPS-CII-YZ-BM		Model 102-WPS-CI-YZ-TM Model 102-WPS-CI-YZ-BM Model 102-WPS-CII-YZ-TM Model 102-WPS-CII-YZ-BM	Model YZ-103-CI/CII-W-H
Model YZ102-CI/CII-W-V Type Y & Z Vertical Mount Enclosure Pressurization Unit (with pressure switch)	Model 1002-WPS-CI-YZ-LH Model 1002-WPS-CI-YZ-RH Model 1002-WPS-CII-YZ-LH Model 1002-WPS-CII-YZ-RH		Model 102-WPS-CI-YZ-LH Model 102-WPS-CI-YZ-RH Model 102-WPS-CII-YZ-LH Model 102-WPS-CII-YZ-RH	Model YZ-103-CI/CII-W-V
Group B, C & D Pressure Switch Options
-24 (24 VDC), -120 (120 VAC) or -240 (240 VAC) added as last segment to Horizontal or Vertical Mount Unit Model Numbers to feature Group B, C & D rated Pressure Switches Example: YZ102-CI/CII-W-H-24	"WPS" replaced by "WPSA" to feature Group B, C & D rated Pressure Switch, and -24VDC, -120VAC or -240VAC added as last segment to indicate Powered Contact Voltage Example: 1002-WPSA-CI-YZ-TM-24VDC		Group B, C & D rated Pressure Switches were not available while these Products were manufactured	"W" replaced by "B" to feature Group B, C & D rated 120 VAC Pressure Switch on Models with W-H and W-V suffixes Example: YZ-103-CI/CII-B-V
Highlighted fields indicate Products that are discontinued or no longer manufactured

Applications	Configurations
Class I Areas Enclosures Volume not exceeding 75 Cubic Feet	Universal Mount (excluding pressure switch) Left, Right, Top, Bottom or Panel Mounting
	Horizontal Mount (including pressure switch) Top or Bottom Mounting	Vertical Mount (including pressure switch) Left or Right Mounting

Best Purging Systems Corporation	Pepperl+Fuchs Bebco EPS^® (circa 2003-Present Day)	Bebco Industries EPS Division (circa 1990-2003)	Bebco Industries EPS Division (circa 1985-1989)	D & M Instruments (circa 2003-2013)
Model YZ103-CI/CII-L-U Type Y & Z Universal Mount Enclosure Pressurization Unit (less pressure switch)	Model 1003-LPS-CI-YZ-LH Model 1003-LPS-CI-YZ-RH Model 1003-LPS-CI-YZ-TM Model 1003-LPS-CI-YZ-BM Model 1003-LPS-CI-YZ-PM Model 1003-LPS-CII-YZ-LH Model 1003-LPS-CII-YZ-RH Model 1003-LPS-CII-YZ-TM Model 1003-LPS-CII-YZ-BM Model 1003-LPS-CII-YZ-PM		Model 103-LPS-CI-YZ-LH Model 103-LPS-CI-YZ-RH Model 103-LPS-CI-YZ-TM Model 103-LPS-CI-YZ-BM Model 103-LPS-CI-YZ-PM Model 103-LPS-CII-YZ-LH Model 103-LPS-CII-YZ-RH Model 103-LPS-CII-YZ-TM Model 103-LPS-CII-YZ-BM Model 103-LPS-CII-YZ-PM	Model YZ-103-CI/CII-L-U
Model YZ103-CI/CII-W-H Type Y & Z Horizontal Mount Enclosure Pressurization Unit (with pressure switch)	Model 1003-WPS-CI-YZ-TM Model 1003-WPS-CI-YZ-BM Model 1003-WPS-CII-YZ-TM Model 1003-WPS-CII-YZ-BM		Model 103-WPS-CI-YZ-TM Model 103-WPS-CI-YZ-BM Model 103-WPS-CII-YZ-TM Model 103-WPS-CII-YZ-BM	Model YZ-103-CI/CII-W-H
Model YZ103-CI/CII-W-V Type Y & Z Vertical Mount Enclosure Pressurization Unit (with pressure switch)	Model 1003-WPS-CI-YZ-LH Model 1003-WPS-CI-YZ-RH Model 1003-WPS-CII-YZ-LH Model 1003-WPS-CII-YZ-RH		Model 103-WPS-CI-YZ-LH Model 103-WPS-CI-YZ-RH Model 103-WPS-CII-YZ-LH Model 103-WPS-CII-YZ-RH	Model YZ-103-CI/CII-W-V
Group B, C & D Pressure Switch Options
-24 (24 VDC), -120 (120 VAC) or -240 (240 VAC) added as last segment to Horizontal or Vertical Mount Unit Model Numbers to feature Group B, C & D rated Pressure Switches Example: YZ103-CI/CII-W-H-24	"WPS" replaced by "WPSA" to feature Group B, C & D rated Pressure Switch, and -24VDC, -120VAC or -240VAC added as last segment to indicate Powered Contact Voltage Example: 1003-WPSA-CI-YZ-TM-24VDC		Group B, C & D rated Pressure Switches were not available while these Products were manufactured	"W" replaced by "B" to feature Group B, C & D rated 120 VAC Pressure Switch on Models with W-H and W-V suffixes Example: YZ-103-CI/CII-B-V
Highlighted fields indicate Products that are discontinued or no longer manufactured

Applications	Configurations
Class I Areas Enclosures Volume not exceeding 250 Cubic Feet	Universal Mount (excluding pressure switch) Left, Right, Top, Bottom or Panel Mounting
	Horizontal Mount (including pressure switch) Top or Bottom Mounting	Vertical Mount (including pressure switch) Left or Right Mounting

Best Purging Systems Corporation	Pepperl+Fuchs Bebco EPS^® (circa 2004-Present Day)	Bebco Industries EPS Division (circa 1990-2004)	Bebco Industries EPS Division (circa 1985-1989)	D & M Instruments (circa 2004-2013)
Model YZ104-CI/CII-L-U Type Y & Z Universal Mount Enclosure Pressurization Unit (less pressure switch)	Model 1004-LPS-CI-YZ-LH Model 1004-LPS-CI-YZ-RH Model 1004-LPS-CI-YZ-TM Model 1004-LPS-CI-YZ-BM Model 1004-LPS-CI-YZ-PM Model 1004-LPS-CII-YZ-LH Model 1004-LPS-CII-YZ-RH Model 1004-LPS-CII-YZ-TM Model 1004-LPS-CII-YZ-BM Model 1004-LPS-CII-YZ-PM		Model 104-LPS-CI-YZ-LH Model 104-LPS-CI-YZ-RH Model 104-LPS-CI-YZ-TM Model 104-LPS-CI-YZ-BM Model 104-LPS-CI-YZ-PM Model 104-LPS-CII-YZ-LH Model 104-LPS-CII-YZ-RH Model 104-LPS-CII-YZ-TM Model 104-LPS-CII-YZ-BM Model 104-LPS-CII-YZ-PM	Model YZ-103-CI/CII-L-U (volume limited to 200 cubic feet)
Model YZ104-CI/CII-W-H Type Y & Z Horizontal Mount Enclosure Pressurization Unit (with pressure switch)	Model 1004-WPS-CI-YZ-TM Model 1004-WPS-CI-YZ-BM Model 1004-WPS-CII-YZ-TM Model 1004-WPS-CII-YZ-BM		Model 104-WPS-CI-YZ-TM Model 104-WPS-CI-YZ-BM Model 104-WPS-CII-YZ-TM Model 104-WPS-CII-YZ-BM	Model YZ-103-CI/CII-W-H (volume limited to 200 cubic feet)
Model YZ104-CI/CII-W-V Type Y & Z Vertical Mount Enclosure Pressurization Unit (with pressure switch)	Model 1004-WPS-CI-YZ-LH Model 1004-WPS-CI-YZ-RH Model 1004-WPS-CII-YZ-LH Model 1004-WPS-CII-YZ-RH		Model 104-WPS-CI-YZ-LH Model 104-WPS-CI-YZ-RH Model 104-WPS-CII-YZ-LH Model 104-WPS-CII-YZ-RH	Model YZ-103-CI/CII-W-V (volume limited to 200 cubic feet)
Group B, C & D Pressure Switch Options
-24 (24 VDC), -120 (120 VAC) or -240 (240 VAC) added as last segment to Horizontal or Vertical Mount Unit Model Numbers to feature Group B, C & D rated Pressure Switches Example: YZ104-CI/CII-W-H-24	"WPS" replaced by "WPSA" to feature Group B, C & D rated Pressure Switch, and -24VDC, -120VAC or -240VAC added as last segment to indicate Powered Contact Voltage Example: 1004-WPSA-CI-YZ-TM-24VDC		Group B, C & D rated Pressure Switches were not available while these Products were manufactured	"W" replaced by "B" to feature Group B, C & D rated 120 VAC Pressure Switch on Models with W-H and W-V suffixes Example: YZ-103-CI/CII-B-V
Highlighted fields indicate Products that are discontinued, not available or no longer manufactured

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Best Purging Systems Corporation
Physical Address: 4725 Lawndale Street, La Marque, Texas 77568
Mailing Address: P.O. Box 68 Hitchcock, Texas 77563
Phone: (844) 787-4348 | Fax: (409) 935-5819
Office Hours: 8 AM to 5 PM CST, Monday - Friday

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