Food and beverage processing runs on the same core requirement as pharmaceutical manufacturing — every wetted surface a product touches has to be contamination-free and fully cleanable — but at production volumes and duty cycles that are usually far higher. Mixers, blenders, homogenizers, and transfer pumps on a food or beverage line run near-continuously between cleaning cycles, and the mechanical seal on that equipment is one of the few rotating components in direct contact with the product. A seal that isn’t built for hygienic service is a contamination risk and a line-stoppage risk in the same part.
At Leak-Pack Engineering, we design and manufacture mechanical seals for food and beverage process equipment, built around the hygienic design principles maintained by 3-A Sanitary Standards, Inc. — crevice-free construction, cleanable surface finishes, and materials that hold up to repeated clean-in-place (CIP) and steam-in-place (SIP) cycles. Whether you’re sealing a dairy pasteurizer, a beverage filling line, or a fruit pulp transfer pump, our engineering team works from your product contact requirements and cleaning regime to recommend the right seal design and materials.
In food and beverage processing, a seal doesn’t just have to seal — it has to survive its cleaning regime as many times as the process demands, without degrading in a way that creates a contamination risk. A dairy line might run a full CIP cycle daily; a beverage filler might run several sanitation cycles per shift. Standard elastomers and O-ring designs that would last years in general industrial service can harden, crack, or lose sealing force after a few hundred steam or caustic CIP cycles — well within a single production year on a high-throughput line.
This is also where regulatory and customer audit exposure enters seal selection. Facilities supplying branded food and beverage manufacturers are routinely audited against hygienic equipment design expectations — whether formally through FDA food facility regulations or through a customer’s own supplier quality program — and equipment with crevices, dead legs, or non-food-grade wetted materials is one of the most common findings in these audits. We design seals to pass that scrutiny from the outset, not retrofit compliance onto a standard industrial seal afterward.
Getting cleaning-cycle life wrong is expensive in a specific way: a seal that starts leaking slightly after repeated CIP cycling often gets diagnosed as a maintenance issue and simply replaced, again and again, without anyone flagging that the underlying elastomer or arrangement was never rated for the actual cycle frequency the line runs. We size seal materials to your real cleaning schedule, not a generic “food grade” default.
Food and beverage facilities run a wide mix of mixing, processing, and filling equipment, each with its own hygienic and duty-cycle demands. We supply seals across this full range:
As with pharmaceutical processing, these requirements interact rather than standing alone — a dairy pasteurizer seal typically has to satisfy hygienic design, cleaning cycle life, and food-grade material compliance simultaneously. We treat that as a single specification exercise rather than three separate checklists.
Below is a general guide to the materials we typically recommend by food and beverage application. Final material selection is always confirmed against your specific product, cleaning regime, and any regulatory or customer audit requirements that apply to your facility.
| Application | Seal Face Combination | Secondary Seal / Elastomer | Wetted Metallurgy |
|---|---|---|---|
| General hygienic mixing/transfer | Silicon Carbide vs. Silicon Carbide | EPDM (steam-grade) | 316L Stainless Steel |
| Dairy processing & CIP/SIP lines | Silicon Carbide vs. Silicon Carbide | FFKM (Kalrez-type) | 316L Stainless Steel |
| Carbonated beverage filling | Silicon Carbide vs. Silicon Carbide | EPDM (steam-grade) | 316L Stainless Steel |
| Fruit pulp / particulate media | Tungsten Carbide vs. Silicon Carbide | EPDM / FKM | 316L SS / Duplex |
| High-temp UHT & retort service | Silicon Carbide vs. Silicon Carbide | PTFE / Metal bellow (no elastomer) | 316L Stainless Steel |
Yes. We size seal materials — including steam-grade elastomers or elastomer-free metal bellow designs — to your actual cleaning cycle frequency, not a generic food-grade default, so the seal is rated for the cycle life your line actually runs.
We design our food and beverage seals around the hygienic design principles maintained by 3-A Sanitary Standards, Inc. — crevice-free construction, cleanable surface finishes, and food-grade materials on all product-contact components.
Yes. Our multi-spring seal designs distribute closing force across multiple springs, resisting the clogging that a single-spring design experiences in pulp, puree, or fiber-bearing media.
Yes. We can supply material certification and traceability documentation for wetted components where your facility’s regulatory submissions or customer supplier-quality programs require it.
Yes. For applications where any product contact with atmosphere is unacceptable, we engineer double seal arrangements with a validated, product-compatible barrier fluid through our seal support systems.
Yes. Our cartridge and agitator seal designs are engineered for retrofit onto most existing food and beverage equipment, including as a direct replacement for seals that are failing prematurely under your cleaning regime.
We supply seals for dairy pasteurizers and processing lines specifically, including metal bellow designs suited to the frequent high-temperature steam sanitation cycles typical of dairy operations, in addition to general food and beverage equipment.
Lead times depend on seal size, arrangement, and any custom documentation requirements. For standard cartridge seal replacements, we prioritize fast turnaround to minimize production line downtime — share your seal drawing or equipment details with our team for a firm timeline.
Every food and beverage line runs a different combination of product, cleaning regime, and throughput demand, which is why we don’t work off a fixed catalogue selection for this industry — every seal we quote starts with your actual process and cleaning cycle requirements. We’re happy to work alongside your quality and food safety teams where a seal specification needs to be reviewed as part of a broader supplier audit or hygienic design documentation package.
Send us your mixer, pump, or filling line specifications — product contact requirements, cleaning cycle frequency, and operating conditions — and our engineering team will recommend the right seal solution for your application. Explore our full range of mechanical seals by industry or send an enquiry directly.
download catalogue