Series 19 Desiccator Cabinet

CLEANROOM FURNITURE

The Series 19 desiccator cabinet and inert atmosphere cabinet are designed Features to create sealed compartments that will hold or contain parts in a dry or Stainless steel construction nitrogen environment. These cabinets were developed to create a storage area Conductive model available that can be purged to create a controlled environment for long-term storage of Polypropylene model available parts or material that will degrade when left out in the normal atmosphere. Optional fixed or adjustable The units are constructed with a heavy-gage, stainless steel outside shell and shelves a stainless steel divider between each compartment. Each compartment is sealed to form a pressurized storage space. The stainless steel shell creates a strong, durable cabinet that will not crack or break apart at the seams like all- acrylic cabinets will. The stainless construction is suitable for heavy storage loads. The compartments have a hinged, clear acrylic door with a heavy-duty stainless steel frame and a cam-action, over center door latch. They are hinged with a continuous hinge and are gasketted with a light gray PVC closed-cell gasket. The back panel of the unit is stainless steel. It is welded and sealed to the back of the unit. This back panel can be modified to attach other equipment or

SOLUTIONS a second set of doors if desired. Optional clear back panel is available. Optional fixed or adjustable shelves can be installed within each of the sealed compartments.

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Standard Construction that is attached to the door by an needle valve, 1/8 FNPT brass inlet The standard desiccator cabinet is adhesive backing. The thick gasket is and outlet fittings, Buna-N “O” ring constructed with a welded type 304 compressed by approximately 15% seals, and an internal float and float stainless steel shell and compartment of its thickness to reduce permanent rod that are stainless steel. NOTE: The dividers. The welds are ground and “set” that can occur when a gasket is main nitrogen shut off valve and finished. The compartments’ stainless over compressed. regulator are optional. steel seams are sealed with a clear The rear of the desiccator can be epoxy sealant to create tightly sealed covered in a variety of materials. The Conductive Quality compartments. standard is clear acrylic, with optional The stainless steel will provide a The stainless steel shell will not ESD PVC or acrylic, safety glass, conductive surface to help dissipate a crack, break, deform or lose its yellow/clear UV filter acrylic and solid static charge. With a conductive integrity like acrylic or other plastic stainless steel. All but the stainless stainless shell and shelves, the stored cabinets will. The stainless steel shell steel back panel are gasketted and parts are in constant contact with a is conductive and will not hold a compression sealed to the welded neutral surface. This keeps a charge charge. This reduces dirt and other shell. The back panel is replaceable off static sensitive parts, and also contamination build-up that is should it become broken or damaged. reduces contamination due to static common for acrylic cabinets. The The stainless steel back panel is attraction. stainless steel shell also shields the permanently welded to the rear of the interior from static charges, creating cabinet. It is sealed with clear epoxy. Multiple Units an enclosure similar to a Faraday cage The standard cabinet is furnished The units are designed to be set or box in which the conducting with leg leveling glides. The standard side-by-side to form a “wall” of stainless steel enclosure neutralizes height to the first compartment storage cabinets. free electrons (static charges) inside (bottom riser height) is 3 in. above the cabinet. the floor. Smaller units setting on a Fittings and Supply Tubing With the conducting stainless steel table can utilize a shorter plastic glide The supply tube fittings compres- construction, when grounded, the for a 2-in. height. Optional risers sion style is white polypropylene, the cabinet can automatically neutralize a heights of 6 in. and 12 in. are also nozzles are PVC, and the tubing is CLEANROOM FURNITURE static charge on an operator as soon available. NOTE: The risers are integral polyethylene. Optional tubing materi- as they touch the door handle. to the cabinet and cannot be re- als are PVC, white polypropylene, or Attached to the front of the welded moved. Optional detachable stands Teflon fittings. shell are stainless steel doors with a are available upon request. viewing window. The standard front The flow meter controls are Options viewing window is clear acrylic with mounted onto the top of the desicca- • Bleeder check valves optional ESD static dissipative PVC or tor assembly and are available in a • Flow meter upgrade from brass to acrylic, safety glass, yellow or clear UV variety of styles and configurations. stainless steel filtering acrylic and solid stainless (no (See the purge control section.) • Individual compartment flow viewing window). Multiple compartment assembly, the meters, specify brass or stainless Each door has heavy duty 1/8 in. purge tubing, and dispersion nozzles (see purge control section) stainless steel hinges, a decorative are located along one side of the • Main nitrogen shut off valve heavy-duty lever handle, and over- cabinet, and the optional bleeder (specify brass or stainless) center cam action door latch, to valve is located on the opposite side. • Regulator (brass or stainless steel, ensure the door pulls tight and the The standard desiccator comes with a high purity stainless steel) door gasket seals against the cabinet. CAP19FMC flow meter control system • Door viewing windows The door latches can be furnished (single flow meter to purge all — Clear acrylic (standard) with individual compartment locks or compartments in that desiccator — ESD, static dissipative PVC or with a high-security bar assembly (See cabinet system). acrylic options for details). The standard flow meters are the — Safety glass The doors seal to the cabinet with a Dwyer VFA series. They are made of — Yellow or UV filtering acrylic 3/4 inch-thick PVC closed-cell gasket solid acrylic with an adjustable brass — Solid stainless steel (no

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CLEANROOM FURNITURE

viewing window) be used, the unit can be bolted to the meter with a main purge tube. The • Rear back panel floor or bottom counterweights can be nitrogen purge rate is constant and set — Clear acrylic added. Consult factory for details. by the flow meter. The recovery rate — ESD, static dissipative PVC or The compartment sizing is the front for an individual compartment is acrylic clear open area. Internal shelves will subject to the flow rate. The system — Safety glass reduce the effective storage area. does not alter the flow rate. An — Yellow or UV filtering acrylic operator can adjust the flow at the — Solid stainless steel (no viewing Purge Control beginning and end of a shift to window) (Not removable. increase compartment recovery time Welded to back of unit) Types of Desiccator Cabinet Purge or leave the flow the same all the • Polypropylene construction; Control Options time. If the flow is the same all the Shell and dividers made of white CAP19BCV Bleeder check valves time, there is often a compromise polypropylene low metal construction CAP19FMC Flow meter control between the compartment recovery • Locks on the door latches CAP19CHL Cabinet high/low-flow rate and total nitrogen consumption. • Security bar to lock doors for high control Meter uses brass fittings unless security areas (Typically also needs CAP19ICP Individual compartment otherwise specified. stainless steel back panel) purge high/low control • Low outgas gasketting CAP19MDC Multiple desiccator CAP19ICP Individual • Purge control options cabinet high/low purge Compartment Purge Control — Manual, single flow meter CAP19RHS Relative humidity The CAP19ICP is designed so each (standard) sensing to control purge desiccator compartment (door) has — Automatic purge when door rate independent high/low purge control. opens CAP19FMM Flow meter manual When an individual compartment is — Electronic humidity controlling control opened, a magnetic sensor on the • Internal compartment shelves CAP19BLD Bleeder check valves door activates an adjustable timer. The — Fixed stainless steel The CAP19BCV bleeder check valve timer starts the high-purge flow to that — Removable stainless steel is designed as a port to allow the individual compartment while keeping — Flat and semi-flat light duty nitrogen to vent out the purged the other inactive compartments at stainless or acrylic with side wall compartment. The bleeder ports are low-flow purge rate. After the timer standards not required with very low-flow purge times out, the high-flow purge rate — Sliding drawers or trays rates; they are required with higher switches back to low-flow and • Standard compartment sizing purge flow rates. remains at low-flow until the compart- — Clear height 8, 10, 12, 14, 16, The valves are designed to improve ments becomes active or the door is 20, 24, 28, 32, 36, 48, 60, 72, the purging airflow and to maintain a reopened. This provides a fast 84 more constant compartment pressure. recovery rate while minimizing the — Clear width 12, 16, 20, 24, 28, As the airflow increases, the valve total nitrogen consumption. 32, 36, 42, 48 allows more air to escape, and as the The system controller has one timer — Front to back depth 12, 16, 20, airflow is reduced, the valve closes. In per compartment, so multiple 24, 28, 32, 36, 42, 48 the event nitrogen pressure is lost, the compartments can be accessed with — Custom sizes and configurations valve will close completely to reduce each being individually timed. A single available upon request air infiltration. adjustable potentiometer controls all — Consult factory for current stock the timers to a range from 0 to 30 sizes. Detailed Description of Flow minutes. NOTE: On multiple tier cabinets, if Control Options Nitrogen consumption is low, the interior width and depth get too because only active compartments small, the cabinet will become “tippy”. CAP19FMC Flow Meter Control get a high-purge flow. The other (2) Cabinet tiers can be attached (standard unless specified) inactive compartments low-flow rate is together to make the unit more Flow meter control has the lowest just enough to maintain a slight stable, an extended base stand can up-front cost. It has a single-flow positive pressure and maintain the dry

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inert environment. This purge option ments (doors) within the system are Individual Compartment Purge and is most often used on larger multiple- opened. When a door opens, a the CAP19CHL, Cabinet High/Low door systems when any of the doors magnetic switch activates an adjust- Control. Like the other systems each or compartments within the desicca- able timer, which starts the high-flow desiccator compartment door will tor system are opened two or more purge to all the compartments in that have a magnetic sensor. These times per hour. NOTE: Multiple purge system. After the timer times sensors are connected in series for a desiccator stacks can be connected to out, the purge flow rate goes back to vertical stack or group of compart- a single CAP19ICP purge control low-flow on all the compartments. ments. When any of the doors in the assembly. The CAP19ICP purge The system uses slightly more “group” are opened all the compart- controllers are available for systems nitrogen than the individual compartments within that group are purged at from 1 to 24 compartments (doors). ment option, but much less than if the high-purge flow rate. The purge module is a stainless continuous purge was used. The Because the system can control steel enclosure that mounts on the purge option is typically used on multiple stacks of different sizes of top of the desiccator cabinet. It smaller desiccator systems or on desiccator cabinets, each purge feed contains the control timers, solenoid systems with very low activity. line has its own high and low-flow valves, low voltage transformer, flow The purge module is a stainless gage to allow for individual control of meters, air regulator, power cord and steel enclosure that mounts on the the high and low-flow rates to the other controls required for the purge top of the desiccator cabinet. It different stacks. system. The front control panel has a contains the control timer, a solenoid total nitrogen flow meter, low-flow valve, low-voltage transformer, flow CAP19DEH Digital Electronic meter indicating the total low-flow meters, air regulator and other Humidity Control System purge rate, high-purge flow off switch controls required for the purge The CAP19DEH is designed to and nitrogen pressure gage with system. The front control panel has a monitor and control the relative regulator control. The standard fittings total nitrogen flow meter, low-flow humidity within a desiccator system. are brass with polypropylene tubing meter indicating the total low-flow Like other systems each compartment for the purge lines. purge rate, high-purge flow off switch has a magnetic door switch to change and nitrogen pressure gage with the purge flow rate of each individual CLEANROOM FURNITURE CAP191CP Options: regulator control. The standard fittings compartment like the CAP19ICP. In • Adjustable low-flow meter for each are brass with polypropylene tubing addition there is a compartment compartment for the purge lines. sampling tube connection from the • Adjustable high-flow meter for compartment bleed port to the each compartment CAP19CHL Options: control box. The sampling tube • Nitrogen shut off valve • Adjustable low-flow meter for each connects to an electronic humidity • Upgrade brass to stainless fittings compartment sensor for measuring and controlling • Upgrade regulator from brass to • Adjustable high-flow meter for the relative humidity within the high purity stainless each compartment desiccator cabinet. • Low nitrogen pressure alarm • Nitrogen shut-off valve The system takes rotating samples • 220 V 50 Hz power input • Upgrade brass to stainless fittings of each compartment. If a sample is Part #CAP19-ICP-* Where * = # of • Upgrade regulator from brass to above the set point, the compartment compartments (doors) being con- high-purity stainless is turned to high-purge rate. Indicator trolled. Sized for 1 to 24 compart- • Low nitrogen pressure alarm light shows which compartment is ments (doors) • 220 V 50 Hz power input being measured. The sampling times are adjustable from 1 to 10 minutes. CAP19CHL Cabinet High/Low- CAP19MDC Multiple Desiccator During the purge exhaust sampling flow Purge Control Cabinet System Purge the compartment pressure is mea- The CAP19CHL purge option The CAP19MDC system is designed sured. If the pressure falls below a switches all the compartments within so a single control module can control present level the system will go into a the purge system from low to high- multiple desiccator stacks. This system high-purge mode for that compart- flow whenever any of the compart- is a combination of the CAP19ICP, ment. The high-flow purge time for

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CLEANROOM FURNITURE low pressure failure is independently • Individual compartment (5) Are the multiple compartments adjusted from the purge time associ- continuous pressure sensing being opened at the same time? ated with opening the compartment (6) Is monitoring of the compart- door. No extra nitrogen is used as a Examples of the Systems ments humidity a requirement? result of the sampling, because the • The CAP19ICP system (individual Starting with an empty cabinet with sample gas is the purge gas being compartment purge control) 60% RH internal compartment of discharged from the compartments controls up to 24 individual humidity level, there will be a 25% through the bleeder port. compartments i.e., (2) 6 tier (12 reduction in relative humidity for each When the electronic sensor detects total doors/compartments). complete volume equivalent air high humidity the purge flow will go • Controlling 12 individual compart- change. This rate will continue until into the high-flow and will maintain ments. When an individual the desiccator reaches approximately that flow rate for the same amount of compartment door opens (1 of four air volume changes — the RH time on the “active compartment 12) only that one compartment (1 would be about 18% or approxi- purge” timers. of 12) would be purged at the mately a 70% reduction in the The purge module is a stainless high-flow rate. humidity. At the 18% level the rate steel enclosure that mounts on top of • The CAP19CHL (Cabinet High/ reduction level decreases to about the desiccator cabinet. It contains: a Low Purge System) i.e., using the 15% per air change down to about digital humidity controller, control same (2) 6 tier (12 total doors/ 8% to 10% level where the curve timers, solenoid valves, low-voltage compartments) starts to flatten out. At this point a transformer, flow meters, air regulator, • Controls a single or multiple tiers. flow rate of 10% to 20% of compart- power cord and other controls When any one of the doors (1 of ment/cabinet volume will maintain required for the purge system. The 12) in that system open all the the reduced RH level. front control panel has a digital compartments (12 of 12) get a The 60% RH inside the cabinet can humidity display, total nitrogen flow high-flow purge rate. be reduced to under 20% in less than meter, low-purge flow meter (indicat- • The CAP19MDC (Multiple Desicca- an hour, after which the flow rate ing the total low-flow purge rate), tor Cabinet): could be switched to a reduced rate high-purge flow off switch, and (12) 6 tier desiccators (72 total saving on nitrogen consumption. nitrogen pressure gage with regulator doors); When any one of the 6 High volume of compartment with control. The standard fittings are brass doors in the tier or group (1 of 72 stored material can reduce nitrogen with polypropylene tubing for the total doors) are opened that entire consumption required to bring the purge lines. tier or group (6 of 72) compart- cabinet down to its “dry” state, but ments would be purged with the has little effect on the low-flow purge Times When High Purge Rate is high-flow rate. rate required to “maintain” a particular Activated: state. If the material being stored has (1) When the door to the compart- Determining Which Purge residual moisture, larger/longer high- ment is opened System flows will be required in order to dry (2) When a compartment has low (1) How many compartments are the materials. Drying will typically pressure during the RH sampling being controlled? require longer slower high-flow purge (3) When the compartment relative (2) How fast do the compartments rates or use of the electronic humidity humidity goes above a preset need to recover after they have sensing alarm. level been accessed? Assume 8,760 hours in a year, Available sizes on desiccators with (3) How frequently are the compart- assume 2,024 working hours in an 1 to 24 compartments. ments accessed? 8-hour shift (2080 - 56 hours for 7 (4) What is the maximum length of standard annual holidays), a low-flow CAP19DEH Options: time the product within the purge rage. In the above example a • High-flow meter to each compartments can be in and out 25 cubic foot cabinet with a 4 air compartment of the specified environment per change per hour high-flow rate (100 • Low-flow meter to each day, week, or month before cubic ft./hour) and a 15 cubic foot compartment damage will occur? per minute low-flow purge rate, would

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save (24 hours - 8.5 shift - 1 hour of Items • Lexan or conductive PVC for doors high-flow after the shift ended is 14.5 1. Base stand and back panel hours per day * 5 days + 48 hours for 2. Door hinges • White polypropylene construction the weekend) 120.5 hours per week 3. Doors • Door hinged on RH side of low-flow operation. 100 CFH - 15 5. Shell — stainless steel • Low out gassing construction CFH low-flow is an 85 CFH savings. 6. Back panel — stainless steel • Other options and sizes upon 85 CFH * 120.5 hours per week = 7. Leg leveling glides request 10,242 CFM/week or 532,000 CFM 9. Door knob — 90 degree turn per year. Multiple this by your cost per Guarantee CM on nitrogen and you have a lot of Options — Shown A written 1 year warranty is money. 4. Nitrogen dispersion tube furnished with each cabinet. The figures shown are reference 8. Flow meter only. Clean Air Products is making no 10. Nitrogen on/off valve claims as to what the nitrogen 11. Shelves inside compartment consumption will be for you individual 12. Ionization power supply system. 13. Ionization power cord Safety Note: The desiccator cabinets should be placed in a well- Additional Options — Not ventilated room. If the cabinets are Shown placed in a small room such as a • Automatic bleeder valves closet, the purge nitrogen can displace • Casters with and w/o brakes the oxygen within the space and • Glass doors with stainless steel cause suffocation. frames

CLEANROOM FURNITURE

Sizes (in inches) Standard clear inside width 12 14 16 18 20 22 24 28 or AR Standard clear inside height 10 12 14 16 20 22 or AR Standard clear inside depth 10 12 14 16 18 20 22 or AR • While Series 19 has a number of standard sizes, the cabinets can be made to meet your specific requirements. • Specify the number of compartments in a stack. • Single units available without stand. • The standard removable shelf is 3/4 inches thick and installs within the compartment. • Specify number of shelves per compartment and minimum clearance between shelves.

Specifications subject to change. Please contact factory for details.

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