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AEROFEED LTD.

Aerofeed Storage Cabinets

AEROFEED WPS (Waffle Pack Storage) 

AEROFEED WPS NITROGEN STORAGE CABINETS 
The AEROFEED's Series WPS Nitrogen Storage Cabinets are drawer-type units, designed primarily to store waffle packs (chip trays) in a nitrogen environment. Each fully extendable and removable drawer is fitted with a set of partitions designed to hold the waffle packs in either segregated rows or segregated stacks, depending upon the option chosen. Drawers are constructed with ventilated bottoms to permit nitrogen flow around the stored components. Series WPS Cabinets are available in both electrically grounded models for storage of static-sensitive devices and non-grounded models for use where static is not a problem.

CABINET CONSTRUCTIONS  

AEROFEED WPS Drawers
    Picture shows a Vari-Cab cabinets with 3x WPS drawers
 (the lower door section).
(click on picture to enlarge).

Cabinets are constructed according to AEROFEED's time-proven design - a solid wooden unit, covered on the outside with white matte-finish melamine laminate, and fitted with an opaque white acrylic faceplate. Interior surfaces of electrically grounded units are covered with solid aluminium sheet in critical areas, and with a factory applied melamine coating where electrical continuity is not required. All interior surfaces of non-grounded units are covered with melamine. Transparent acrylic doors are of AEROFEED's famous "bow-proof" design, sealing tightly with a single latch.

DRAWER & PARTITION CONSTRUCTION  

Drawers and partitions are fabricated from 1/8" thick aluminium, configured to permit vertical gas flow around the stored components. Drawers move on roller and ball bearing slides, allowing them to be fully extended from the front of the cabinet, without tipping, for easy access to items stored at the rear. Stainless steel slide rollers in grounded cabinets provide electrical continuity from drawer to ground; there are no wire "feelers" or spring tension parts to get damaged or bent and break the grounding circuit. Non-grounded drawers move on nylon rollers.
Each drawer may be removed from the cabinet by pulling it to its fully extended position, then elevating the front slightly to clear the internal stops
. 

PARTITION OPTIONS   STYLE "EC" PARTITION  

Drawers are available with any of three standard partition styles - two for storing packs on edge, one behind the other, in segregated rows, and one for storing packs horizontally, one on top of the other, in segregated stacks. If desired, two or three different partition options may be used in different drawers of the same cabinet. Custom designed partition options are also available to suit individual user requirements.

EC style partitioning provides a similar storage arrangement to Style ES, below, but has one additional feature:
Instead of all six channels being fastened together as a single assembly, Style EC channels are individual units, which can be removed one at a time from the drawer. This feature allows a portion of the drawer's contents to be removed while the remainder is left stored in its nitrogen environment.

STYLE "ES" PARTITION   STYLE "HS" PARTITION  

ES Style partitions are rigid assemblies, providing six connected channels, each 2-1/4" wide, running from the front of the drawer to the back. Channels are separated from each other by 1/8" thick aluminium. Each channel is provided with a spring-loaded follower assembly, designed to hold the waffle packs upright and located toward the front of the channel. Followers may be positioned at any point in the channel to provide the desired level of storage compactness. Each channel, in addition, is provided with two stainless steel divider cards (12 per drawer) which may be positioned between any two packs to separate those in front from those behind. Cards have label space at the top for parts identification.

Partitions in Style HS drawers form cubicles, 2-1/4" square by 2" deep, each of which can hold up to five 2" x 2" chip trays, one on top of the other, assuming that each tray is stored with its own cover and clip. Capacity per cubicle is increased if trays are stacked with one cover and clip per stack. Cubicle bottoms have large openings so that stacks of trays can be pushed up from below. Horizontal storage of waffle packs can be very advantageous if the chips being stored are thin enough to fall out of their individual tray compartments and collect in a heap between the tray and tray cover when the waffle pack is turned on edge.  

FLOW METER   GROUNDING  

All cabinets are furnished, as standard, with a gas inlet fitting (mounted in the center of the cabinet back) sized to accept 1/4" OD copper or hard plastic tubing. Electrically grounded units are furnished, in addition, with a rear-mounted grounding stud, for connecting the cabinet, by customer's wire, to plant ground. Also, as an OPTION, a regulated Flow Meter can be ordered (see picture).

All conductive and static dissipative surfaces inside a groundable cabinet are connected to a single point in the cabinet interior, placed in series with a one megohm resistor and then wired to a grounding terminal on the outside back of the cabinet. Grounding requires only a hard wire connection from the terminal to plant ground.

TSD OPTION 

Regulated Flow Control
   Regulated Flow Meter (option). (click on picture to enlarge).

Vari-Cabs with the TSD option offer the ultimate in control of ESD and electrostatic fields. They are almost identical in appearance and dimensions to other VC cabinets, but are constructed of all static dissipative materials. They are recommended for use in areas where no untreated acrylics are allowed, or when parts to be placed in storage may be damaged by exposure to EMI fields, even though no direct electrostatic discharge takes place. TSD cabinets include the following features not found in other VC cabinets:
bullet All interior surfaces are lined with aluminum (instead of just sides and floor). Cabinet exteriors are covered with static dissipative laminate, not conventional laminate.
bullet Faceplates are made from anodized aluminum plate, 1/8" thick, rather than white opaque acrylic.
bullet Acrylic doors are permanently coated, both inside and out, with a proprietary resin, making them totally static-dissipative while retaining all of their flexibility and transparency.

to "A word about EMI fields"
 TABLE 1: (Dimensions)   VARI-CAB SPECIFICATION 

SERIES VC-10

SERIES VC-20

 MODEL NUMBER:

VC-11

VC-12

VC-13

VC-21

VC-22

VC-23

 

Width:

21-1/8"

21-1/8"

21-1/8" 21-1/8" 21-1/8" 21-1/8"
Height:

12-1/4"

23-1/8"

34"

12-1/4" 23-1/8" 34"
Depth:

14-1/4"

14-1/4"

14-1/4" 28-3/4" 28-3/4" 28-3/4"

NUMBER OF DOORS:

1

2

3 1 2 3

Internal Volume:
(cu ft)

1.6

3.3

4.9

3.4 6.8 10.3

Shelf ODs:

19-1/2" wide x 13-1/2" deep

19-1/2" wide x 28" deep

Drawer ID's:
(Specify)

16-3/4" wide x 12-1/4" x 1" deep
OR
16-3/4" wide x 12-1/4" x 1-3/4" deep

16-3/4" wide x 26-1/4" x 1" deep
OR
16-3/4" wide x 26-1/4" x 1-3/4" deep

NOTES:

Ungrounded ("U"), grounded ("G") and totally static dissipative ("TSD") models all have the same dimensions.
Door openings on all models measure 9-1/2" high by 18-3/8" wide.
 TABLE 2: (Materials)   CONSTRUCTION MATERIALS 

(MODEL NUMBER) SUFFIX

 SUFFIX:

"U"

"G"

"TSD"

CABINET LINING:

All melamine

Aluminum sides and floor, melamine back and ceiling

All aluminum

SEPARATORS:

 Aluminum and/or Conventional polyethylene

Aluminum and/or Static-dissipative polyethylene

Aluminum and/or Static-dissipative polyethylene

CABINET EXTERIOR:

Conventional melamine
.045" thick

Static dissipative
melamine - .045" thick

FACEPLATE:

Opaque white acrylic
1/4"  thick

Anodized aluminum
1/8"  thick

* DOORS:

Conventional   acrylic
2 layers, each 1/4"  thick

Static dissipative acrylic
2 layers, each 1/4"  thick

* NOTES:

Clear doors are standard on all models. Amber doors for UV blocking 
are available on "U" and "G" models only

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Copyright 1998 BITA ELEKTRONIK SVENSKA AB 
Last modified: 2016-08-22