Sprinkler System Cases: Head & Alarm Component Protection

An automatic sprinkler system ships as a mixed list of hardware: sprinkler heads, alarm valve assemblies, water flow indicators, inspector's test connections, grooved pipe fittings and flange accessories. The key conclusion up front: the transport hazards here differ from those of general machinery. A sprinkler head is a precision item carrying a glass thermal element and a thin deflector plate, and an alarm valve is a sealing item built around a rubber clapper with a millimetre-scale orifice. What both have in common is exposure to impact, corrosion and orifice contamination, so a packing scheme should concentrate on individual location, orifice cleanliness and corrosion separation rather than on adding wall thickness. A sprinkler system stands idle for years and then has to work once, so the condition of the hardware on arrival decides whether the hydrostatic test and the fire acceptance inspection pass on the first attempt.

The most frequent cause of rework on site is not a broken case but invisible damage. A deflector plate squeezed slightly out of shape changes the water distribution pattern once the head operates. A glass bulb struck from the side can crack invisibly and burst later under ordinary pressure fluctuations. A grain of casting sand left on a clapper prevents the valve from holding pressure during the hydrostatic test. Needle valves and gauge tails on a test connection rust solid and get forced and ruined during commissioning. Most damaging of all is the orifice and strainer path: once metal swarf or fibre lodges in a channel of roughly two millimetres, the measured flow coefficient drifts away from the design value. The same failure patterns appear in refinery valve component cases, except that sprinkler hardware has smaller ports and a higher cleanliness threshold.

Contents

• Sprinkler system components and the packing problem
• Sprinkler heads: protecting the thermal element and deflector
• ESFR and in-rack heads: dedicated packing constraints
• Alarm valve assemblies: protecting the sealing faces
• Water flow indicators and pressure switches: electrical protection
• Inspector's test connections: kit-based stowage
• Pipe fittings, grooved couplings and threaded ports: rust strategy
• Orifice and strainer blockage: cleanliness grading and desiccant
• Fast deployment: sequence numbering and zone mapping
• IP67 and gentle cushioning: two engineering targets for a head case
• The compliance frame: GB 50084 and NFPA 13 on delivered condition
• Distribution and export: case sizes, loading and marking
• Frequently asked questions
• Conclusion and further reading

Sprinkler system components and the packing problem

Broken down by function, sprinkler hardware falls into five groups: operating elements, control elements, monitoring elements, connecting elements and commissioning elements. Their sizes span two orders of magnitude. A standard head weighs under 100 grams, while a DN150 wet alarm valve assembly can exceed 100 kilograms. Shipping both in the same compartment is not unusual in this industry, and it is the main source of deformed deflectors and scored clappers.

Looking at the damage mechanics, sprinkler hardware fails in two ways. Displacement damage comes from relative movement and shows up as deformation and micro-cracking, and it is solved by restraint and cushioning. Contamination damage comes from dust, moisture and swarf and shows up as corrosion and blocked orifices, and it is solved by cleanliness control and separation. Neither type is reliably visible at the moment the case is opened, which is why the packing scheme has to be designed around what can be verified rather than around what looks solid.

A second factor that gets overlooked is the quantity mix. Head counts on a project follow ceiling height, hazard class and protected area, so a shipment carries many models in small quantities. If the case is built for one model only, the crew ends up opening and closing cases repeatedly to pick stock, and heads sit exposed to site dust in between. Splitting the interior into removable module trays grouped by model cuts the number of openings sharply, and the structural options are described under removable divider systems for cases.

Sprinkler heads: protecting the thermal element and deflector

The sprinkler head is the most precise and least expensive component in the system, and precisely because the unit price is low it receives the least attention on site, even though its failure has the most direct consequence. A bent deflector changes the spray pattern; a micro-cracked bulb can fail while the system is still being filled.

Protection rests on three actions: locate, separate and guard. Locating means every head sits in its own slot or bore, with the slot bore matched to the frame profile and the bore depth set at roughly two thirds of the frame height so the head cannot wobble. Separating means keeping at least 15 mm between adjacent heads so frames never bear on each other. Guarding means fitting a disposable plastic cap over the thread and frame, which keeps dust off and prevents accidental contact; the cap comes off at installation, so no second cleaning step is needed.

Closed-cell EVA or XPE is the right insert stock, with density chosen from the total head weight. As an experience range, when a single case holds 50 to 200 standard heads, keep insert compression under 5 percent so the slots still grip after many open-and-close cycles. Open-cell sponge and loose chip fill are unsuitable because shed particles travel straight into the inlet.

Where heads ship with a decorative escutcheon, treat the escutcheon as a thin-plate item on its own layer rather than sharing a cavity with the frames. A distorted escutcheon does not stop the head from operating, but it spoils the fit and finish that the acceptance inspection looks at, and putting it right means opening the ceiling again, which costs far more than one extra insert layer.

ESFR and in-rack heads: dedicated packing constraints

Early suppression fast response heads serve high-piled storage. They have a larger orifice, higher flow and a fast thermal element, and their frame is more open in construction than that of a conventional head, which makes them less tolerant of contact. In-rack heads are installed inside racking, are elongated in form and often carry a protective frame and a directional feature, so the frame taking load is the main transport risk.

Three constraints follow. First, fit a purpose-made guard rather than wrapping in film; the guard has to cover the whole frame circumference and leave at least 10 mm of clearance to the thermal element. Second, never alternate the heads front-to-back in one cavity, because opposing orientation makes the frames brace each other and transmits any drop load directly into the thermal element. Third, load fewer heads per case than for conventional models: as an experience range, take about sixty percent of the conventional count for the same cavity volume, trading space for cushioning margin.

ESFR heads are also commonly supplied alongside racking systems, and the site sequence is racking first, heads second, so the packing is best grouped and labelled by rack level and issued level by level. This is the same sequence-driven approach used in custom foam insert design, with the extra requirement that orientation and facing marks stay legible and visible.

Where heads carry a response-time marking, keep the marked face upward and exposed so insert friction cannot rub it off. Losing the marking does not change how a head operates, but it complicates the model verification that acceptance inspections perform, particularly on projects that mix response classes.

Alarm valve assemblies: protecting the sealing faces

The alarm valve is the heart of the system and comprises the body, clapper, seat, retard chamber, water motor gong and pressure switch ports. Its transport risk concentrates on the clapper-to-seat sealing pair and on millimetre-scale restrictor passages.

The clapper is usually rubber-faced and takes a permanent set when held under load. In transit it should sit free or barely touching, so do not strap it down hard just to immobilise the assembly. If the clapper is already closed at the factory, restrain the assembly axially through the body instead of loading the clapper. The seat then needs impact protection, with blind flanges or caps over the flanged ports.

Restrictor orifices and strainers form the second weak point. Retard chamber and restrictor channels commonly run at millimetre bore, so a single grain of moulding sand or a metal chip shifts the retard timing. The pre-shipment routine is blow and cap: clear the internal cavities with dry compressed air, then plug every port with a plastic stopper. Nothing inside the case may shed, which rules out open-cell foam and paper-based void fill that crumbles under vibration.

Assemblies above DN100 normally need a heavy-duty case with a base pallet or forklift slots. A high-density insert supports the assembly at four points so the mass travels into the case floor rather than through the valve body into the side walls, and at least 40 mm of clearance should remain between body and wall so an external impact is not transmitted straight to the casting.

Water flow indicators and pressure switches: electrical protection

A water flow indicator combines a paddle, a linkage and a microswitch, while a pressure switch contains a diaphragm, a spring and terminal blocks. Both are electromechanical hybrids, so they need protection against mechanical distortion and against moisture at the same time.

The paddle is a thin plate and must not be pressed or bent; keep it straight and lay it along the long axis of the case. Support the linkage and microswitch side with soft padding so the terminals never see the paddle's inertia. The diaphragm in a pressure switch takes a set under compression, so face the diaphragm chamber upward and leave at least 20 mm of clear space above it.

For the electrical side, use three layers: an antistatic bag, an individual soft-lined cavity, and an indicating desiccant. The bag protects terminals and circuitry, the cavity limits movement, and the desiccant controls humidity. Where a unit ships with flying leads, coil them to at least 100 mm diameter and tie them onto the liner so the root solder joints cannot be pulled.

Enclosure sealing matters disproportionately for electrical items. An IP67 construction blocks sprinkler water and standing site water from getting in, and the basis for that claim is set out in IP67 waterproof case selection. One qualification matters: a sealed case develops a pressure differential as temperature cycles, so for long storage fit pressure equalisation and check the desiccant at intervals rather than sealing the lid and leaving it closed for a year.

Inspector's test connections: kit-based stowage

An inspector's test connection simulates the operation of a single head and comprises a test valve, a pressure gauge, a drain connection and a flow measurement port. Because it is used repeatedly through the commissioning phase and gets carried around, it is a high-risk item for both corrosion and mechanical damage.

Stow it as a kit, with orientation fixed and quick access. Keeping the valve, gauge and connections together in one removable tray means nothing is missing when the crew needs it. Fixing orientation with the gauge face all one way and fitting a cover protects the dial and keeps it readable. Making the tray lift out whole means no digging through the case.

For thread corrosion, coat every exposed thread with anti-seize grease and fit plastic caps, and plug the gauge port. Whether a needle valve should travel cracked open or shut depends on the manufacturer's instruction. On some designs a fully closed needle rests hard on its seat for the whole journey and can deform slightly under vibration. Absent specific guidance, keeping it slightly open with the port plugged is the safer default.

Small items like these tend to sink to the bottom of a case, so the tray must have its own fixed position and must never sit beneath heavy hardware. In distribution, shipping test connections in a separate case from heads is more practical, because the two categories are handled and opened at completely different frequencies.

Pipe fittings, grooved couplings and threaded ports: rust strategy

Fittings include grooved couplings, tees, elbows, reducers, flanges and bolts. Their surfaces are usually galvanised or coated, and the transport risks are a damaged coating and aged rubber sealing rings.

Scratched galvanising matters more than it appears. Once the zinc layer is broken the surface first shows white rust and then becomes a pitting site, and in coastal projects or damp basements that progresses quickly. Corrosion performance of fittings and case hardware can be assessed with the salt spray method of GB/T 10125, and a supplier can be asked for test results as part of the purchase specification.

Rubber sealing rings age, so sharing a case with heavy items is a bad arrangement. Bag the rings by size, mark size and quantity, and place them on a level that takes no load. Rings must also stay away from grease-based rust preventive, because grease swells rubber.

Packing also has to reflect how the hardware is installed. A grooved joint needs the coupling and the ring together, so if they travel in separate cases with no matching label the crew ends up matching by eye. Grouping each bore size as coupling plus ring, with the bore marked on the bag, removes that pause.

Orifice and strainer blockage: cleanliness grading and desiccant

Between the inlet and the deflector of a sprinkler head runs the passage that sets the flow coefficient, and its bore is well below the scale of ordinary metal swarf. Once that passage is contaminated, the measured coefficient drifts from the design value, and the deviation only shows up in a flow test during acceptance, when correction is expensive.

Manage cleanliness in three grades. Grade one is the part: blow the head interior clear with dry compressed air before packing, and never wipe with cotton waste or a brush, both of which leave fibre behind. Grade two is the insert: use closed-cell, non-shedding stock and exclude open-cell sponge and recycled fill. Grade three is the case: keep a head case internally dry with no dust source, and never ship it together with fittings that generate abrasion debris.

For humidity, put an indicating desiccant and a humidity indicator card in every head case so the condition is readable the moment the lid comes off. Size the charge from case volume, journey duration and climate, and leave margin for sea freight and monsoon seasons. The principle matches protective case cleaning and maintenance: every case is emptied, wiped, dried and inspected before the next load, so residue from the previous shipment cannot become the next contamination source.

On export orders bound for humid regions, add vapour-phase corrosion inhibitor material so galvanised and threaded parts get supplementary protection inside the sealed volume. It must not touch the thermal element or the rubber clapper, so place it in its own pouch at a distance rather than loose in the cavity.

Fast deployment: sequence numbering and zone mapping

Sprinkler installation runs mains first, branch lines second, heads last, and head fitting frequently overlaps ceiling works. Packing organised in that order lets a crew take one case and complete one level without extra handling.

The mapping has three layers. The first is case position: mark the outside of each case with floor, fire compartment and system number, and map every interior cavity to an installation location on the drawing. The second is model: keep one case to one response class, one bore or one temperature rating so nothing has to be sorted on site. The third is quantity: pack the design quantity for that area and reserve a small number of spare positions for additions before acceptance.

The same mapping pays off in distribution, where the pain points are picking speed and model verification. Designing the case as removable trays under a transparent cover with barcode labels allows picking and stocktaking without opening and rummaging, and the structural idea is set out under portable transport boxes, adjusted for antistatic and moisture requirements.

For air freight or emergency replenishment, the case must remain practical to move by hand. Size a head case so two people can lift it comfortably, and give a heavy valve case forklift slots or castors, because dragging a case across a yard by force damages the sealing geometry.

IP67 and gentle cushioning: two engineering targets for a head case

A head case faces two kinds of environmental load: water and dust from outside, and impact and vibration in transit. The first is measured by an enclosure rating, the second by impact class and cushioning design, and neither substitutes for the other.

Enclosure ratings use the IP code defined by IEC 60529 and by the Chinese standard GB/T 4208. For sprinkler hardware, IP67 means the enclosure excludes dust and survives a defined water-immersion period without harm, and it covers unloading in rain, temporary open storage, standing water on a basement slab during construction, and the condensation that forms inside a sea container. Where a project only involves covered transport and indoor storage, IP54 to IP55 is sufficient, and paying for excess rating is unnecessary.

Impact and cushioning cannot be judged from the enclosure class alone. A head has a low failure threshold, not because of mass but because the deflector is a low-stiffness plate and the glass bulb tolerates little side impact. Cushioning should therefore follow two rules: soft contact, meaning low-hardness closed-cell stock that never bears directly on a frame or deflector, and full location, meaning shape restraint rather than pressure clamping, so the head cannot move but is never squeezed.

Insert choice follows the comparison between materials. EVA recovers well and carves cleanly, which suits a head carrier; XPE is softer and suits a top compression pad; PE is firmer and suits a base layer for fittings. Flammability of the stock can be graded using the UL94 scheme where a storage or transport application calls for it, with the important qualification that UL94 describes how a plastic itself burns and says nothing about enclosure protection, so the two should not be conflated. The comparison is set out under case foam material comparison.

The compliance frame: GB 50084 and NFPA 13 on delivered condition

Sprinkler design and acceptance follow two main systems. Domestically, GB 50084, the code for design of sprinkler systems, works together with product standards and installation acceptance rules to govern hardware performance and workmanship. In North America, NFPA 13, the standard for the installation of sprinkler systems, is widely applied on export projects, foreign-owned plants and insurance-driven specifications.

Neither system sets out packaging clauses for transport, but both share the same expectation that hardware delivered to site is new, undamaged, unobstructed and clearly marked. The practical objective of a packing scheme is therefore to make hardware ready for incoming inspection and system pressure testing as delivered, rather than fit to be repaired first and installed afterwards.

From a compliance standpoint, keep three records with the shipment. The first is the packing list with model markings, which lets the delivered goods be checked against the design drawings. The second is a material statement for the insert and case, showing that contact materials will not chemically affect the thermal element or the rubber parts. The third is a transport test conclusion, built from an ISTA procedure, the GB/T 4857 series or ASTM D4169, which supports the statement that the journey was controlled. For environmental methods, MIL-STD-810H offers vibration, shock and temperature-humidity test methodology, and it should be stated that cases of this class hold no military certification and that the standard is cited only as a source of methods.

Where certified fire products are involved, buyers typically also ask for evidence of a quality management system. JUNZHIJIA, manufactured by Kexin New Materials (Guangdong) Co., Ltd. under an ISO 9001 quality management system, supplies material statements and test documents for the case and insert so that installing contractors can file them with fire acceptance records.

Distribution and export: case sizes, loading and marking

Distribution and project work place different demands on packaging. Project work cares about getting it right in one dispatch. Distribution cares about repeated opening, fast picking and easy returns, so three structural points deserve reinforcement.

The first is the opening mechanism. A distribution case may be opened several times a day, so hinge and latch fatigue life matters more than peak sealing performance, which argues for cushioned stops and individually replaceable latches, as described in toolbox hinge, latch and seal construction and case lock customisation options. The second is visibility: a transparent window or partially transparent lid allows model and quantity to be checked without opening. The third is reconfigurability: trays and dividers should be rearrangeable so one case can carry standard heads today and ESFR heads or fittings tomorrow.

Export marking should be bilingual and should carry hazard class, response class, temperature rating, bore and quantity, so customs and site verification cannot misread it. Where a project requires reuse and return, print a recycling note and a case serial number on the shell so units can be tracked through the loop.

For loading, put heavy items low, keep precision items central, and leave at least ten percent of internal volume free for cushioning and access. Filling a case until it barely closes is the main reason a gasket stays under compression, loses rebound and eventually stops keeping water out.

Frequently asked questions

Q: Why should sprinkler heads not share a compartment with grooved pipe fittings? A: The two categories fail in opposite ways. A head needs soft contact and shape location, and any hard contact can deform the deflector or micro-crack the glass bulb. Fittings are heavy, threaded and grooved, so under vibration they rub continuously and generate metal swarf. Mixing them damages both: heads get scratched, and fittings are held off the case floor by head guards and start to migrate. Fittings also carry sharp thread crests and grooved jaws that can mark several heads in a single vibration cycle. Cleanliness degrades as well, because a case that has once carried fittings keeps shedding debris into the slots for the rest of its service life unless it is fully cleaned before reuse. If freight economics force a shared case, use a rigid divider to separate the zones completely, lock the fittings to the base, keep heads on the upper level away from the walls, and leave at least 40 mm of cushioning plus a separate desiccant between them. The safer route is separate cases.

Q: After a long journey, how can you tell whether glass bulb heads are still usable? A: Check in three steps. First, visual inspection: under good light look at every bulb for cracks, chips or abnormal internal voids, check the deflector for bending, distortion or displacement relative to the frame, and check threads for impact damage. Second, fit check: trial-fit a head into its escutcheon and confirm it threads in without binding, because a distorted frame makes entry difficult and a binding thread usually means the frame has taken a load. Third, sampling: confirm response class, temperature rating and bore markings are clear and consistent on an agreed sample. Any head with a cracked bulb or a deformed deflector should be scrapped, because its water distribution is no longer predictable and the risk shows up only when the system operates. If the case contains free particles, the insert is shedding, or the desiccant has expired early, widen the sample and treat the whole batch as suspect. Where a batch has been stored for a long period after arrival, add a pressure test on a sample rather than relying on appearance alone.

Q: How does packing for ESFR heads differ from packing for standard heads? A: The differences are structural strength and loading density. ESFR heads serve high-piled storage, carry high flow, have an open frame and leave the thermal element relatively exposed, so they tolerate contact far less well than conventional heads. A purpose-made guard covering the whole frame circumference, with at least 10 mm clearance to the thermal element, is mandatory, and film wrapping alone is not protection. Never alternate orientation within a cavity, because opposing frames brace each other and pass drop energy straight into the element. Load about sixty percent of the conventional count for the same cavity volume, trading space for margin. Group and label by rack level, since ESFR heads usually ship with racking and the site sequence is racking first and heads second. Choose a denser, lower-compression closed-cell stock so the slots keep their grip after repeated open-and-close cycles. Because ESFR heads are usually the last item fitted on a project, keep at least one spare tray in the case so a damaged head can be exchanged without reopening the whole shipment.

Q: What damages the rubber clapper of an alarm valve most during transport? A: Two mechanisms: sustained compression and particle contamination. The clapper is normally rubber-faced, and strapping it down hard for the whole journey leaves a set that prevents the sealing faces from mating properly, so the system will not hold pressure during the hydrostatic test. Restrain the assembly axially through the valve body instead and let the clapper sit free or barely touching. Contamination follows a second path: moulding sand or metal swarf inside the casting migrates to the seat or the restrictor, scoring the sealing face or shifting retard chamber timing, and retard timing errors are difficult to diagnose on site. Blow the cavities clear and cap every port before dispatch. The valve body wall is also not a load-bearing surface, so support large assemblies at four points, let the weight travel into the case floor, and keep at least 40 mm between body and wall. If an assembly has to travel with the clapper closed, record that fact on the packing list so the site team inspects the seat before pressure testing.

Q: How serious is a scratched galvanised layer on sprinkler fittings? A: It is serious, particularly in damp conditions. Where the zinc layer is broken, the sacrificial protection still works in the immediate vicinity for a while, but in coastal areas, basements or long-term high humidity the surface first shows white rust and then becomes a pitting site that works into the base metal. Prevent damage at the packing stage by dividing fittings so layers cannot scuff, keeping galvanised parts away from stainless steel to avoid a galvanic couple, and coating threads with anti-seize grease under plastic caps. Fittings that travel loose in a large case suffer most, because every vehicle movement lets them grind against each other. If minor scratches are found on arrival, touch up with zinc-rich paint and record it as the project requires. Where the damage is extensive or rust has already started, replace the item, because paint cannot restore the original cathodic protection. A workable rule for the packing area is that fittings should never be free to move more than a few millimetres in any direction, because that movement is what turns a harmless coating into a broken one.

Q: How should orifice blockage and packing cleanliness be controlled? A: Work to three cleanliness grades. At part level, blow head interiors clear with dry compressed air before packing and never wipe with cotton waste or brushes, which leave fibre that later lodges in the inlet. At insert level, use closed-cell non-shedding virgin stock and exclude open-cell sponge and recycled fill, both of which keep generating particles under vibration. At case level, keep head cases dry with no internal dust source, and never ship heads alongside fittings or bolts that abrade. For humidity, fit an indicating desiccant and a humidity indicator card, and read the indicator before removing heads on arrival so a failed seal is detected before the hardware is exposed. Every case is emptied, wiped and dried before reuse. On humid-region exports, vapour-phase inhibitor material can be added, provided it never touches the thermal element or the rubber parts. Water-based cleaning agents should also be avoided on heads and alarm valves, because residue left in a cavity attracts dust and can later block a passage.

Q: How many sprinkler heads fit in one protective case, and how is the mix decided? A: It depends on case class and head model, not on head count alone. Small carry cases are for maintenance spares and repair stock, where convenience dominates and the quantity is deliberately small. Medium transit cases carry project quantities, usually organised as one tray per layer, and the count is limited both by insert compression and by the total gross weight a crew can lift. Large heavy-duty cases are for alarm valves and large bore fittings rather than bulk heads, because the mass involved makes individual head slots inefficient. Two rules set the mix: keep gross weight within a two-person lift, since overloading sharply raises drop and impact risk, and keep one response class and one temperature rating in each case so nothing is re-sorted on site. Projects with many models are best served by removable trays, so one case covers several models with a unique slot for each. Record the actual count per case on the packing list, because a plan that looks reasonable on paper often fails once insert compression and lifting limits are measured.

Q: How can a distributor use protective cases to improve both picking and returns? A: Build three characteristics into the case: visibility, reconfigurability and traceability. For visibility, fit a transparent window or a partially transparent lid so model and quantity can be verified without opening, which reduces opening cycles and extends gasket life. For reconfigurability, make trays and dividers rearrangeable so the same case can hold standard heads, ESFR heads, escutcheons or fittings, cutting the number of case types held in stock and simplifying replenishment. For traceability, mark the case and each tray with serial number, model and quantity and leave room for a barcode, so a return can be checked against the serial number to establish missing items and damage responsibility quickly. Because a distribution case is opened many times a day, choose an individually replaceable latch rather than a sealed-for-life closure, and treat the hinge as the first wear item to inspect. Picking accuracy also improves when tray labels match the labels on the racking, so a picker reads one identifier instead of translating between two numbering systems.

Q: What sampling should be done on sprinkler heads when they arrive? A: Sampling covers appearance, fit and marking. Appearance inspection looks for cracked or chipped bulbs, deflector deformation, frame impact damage, and scratched plating or coating. The fit check trial-assembles the head into its escutcheon to confirm the thread runs freely without binding. Marking verification confirms response class, temperature rating, bore and manufacturer identity are clear and consistent. Sampling ratios follow the project agreement and normally reflect batch size, distance travelled, whether the shipment went by sea, and how good the packaging looks on arrival. A case that is intact, with normal desiccant indication and a non-shedding insert, can be handled at the standard ratio, while a case with visible damage, a failed seal, expired desiccant or free internal particles justifies widening inspection to a full visual check of every head. File all records with the incoming material documents. A written record is the only evidence a claim can rest on, so complete it before the pallets are moved into the building, and photograph any anomaly with the case still loaded wherever that is possible.

Conclusion and further reading

Four aims decide the outcome: precision, cleanliness, corrosion resistance and fast deployment. Heads survive on individual slots and closed-cell inserts, valves on a free clapper and capped ports, electrical items on antistatic bagging and desiccant, fittings on dividers and rust treatment.

Further reading

• Fire Pump Component Cases
• Refinery Valve Component Cases
• Custom Foam Insert Design