Self-adjusting rotary shaft seals · Made in Cherry Hill, NJ
Stop fighting leaks. Start running longer.
Self-adjusting rotary shaft seals engineered for the dirtiest, hottest, most punishing processing equipment in your plant.
- Years in business
- 25+
- Plants installed
- 1,200+
- MTBF documented
- 24,000 h
- Product series
- 07
- Sealing American industry since 2000
- FDA & USDA approved materials
- 316 stainless construction
- Made in Cherry Hill, NJ
01The problem · the answer
Most rotary seal failure is preventable.
The four failure modes on the left account for roughly 80 % of the rotary-seal maintenance hours in a typical processing plant. Every one is solved by the same fundamental design move on the right.
The failure modes
- 01
Rope-packing leaks every shift
Compression packing relaxes within hours of installation. The result is a continuous drip, a wet floor, and a maintenance technician retightening the gland twice a week.
- 02
Mechanical seal fretting
Lip-style and standard mechanical seals fret the shaft within months in dry-bulk service. Replacing the seal also means re-machining or replacing the shaft.
- 03
Powder migration into bearings
Sugar, lactose, fly ash, and frac sand migrate inboard along the shaft, grinding bearings and contaminating the lubricant within weeks.
- 04
Unscheduled downtime
A failed seal at 3 AM is a six-hour outage minimum: lockout, drain, dismantle, replace, refill, restart. Multiply by the number of conveyors in the plant.
The CinchSeal answer
- 01
Self-adjusting design takes up wear
The internal spring takes up wear as faces erode — the same way an automotive disc-brake caliper does. No operator adjustment, no scheduled tightening.
- 02
Air purge keeps the shaft clean
1 to 3 SCFH of instrument air at 5 psig holds powder out of the seal cavity. Bearings stay clean; shafts don't fret.
- 03
Drop-in CEMA pattern
Every 7500 and 7800 series bolts to the existing CEMA stuffing-box pattern. Field retrofits typically take a maintenance technician under one hour.
- 04
Documented MTBF in the field
Five-plus years on dry bulk. Three-plus years on 24/7 sanitary food production with daily CIP. Two-plus years on heavy chemical slurry.
02Product series
Seven series.
One sealing principle.
Every series shares the self-adjusting, air-purged contact design. Housing materials, elastomers, and certifications are tuned for service. Pick by equipment, by process, or by the documentation your QA team requires.
7500 Series
Workhorse seal for screw conveyors, mixers, and dry bulk handling.
- Temp
- −40 °F to 400 °F
- Pressure
- −5 to 25 psig
7600 Series
Outside-mounted single mechanical seal for thin liquids and mild corrosives.
- Temp
- −10 °F to 250 °F
- Pressure
- Vacuum to 30 psig
7800 Series CEMA
All-stainless, washdown-rated seal for food, dairy, and pharma equipment.
- Temp
- −40 °F to 350 °F
- Pressure
- −5 to 25 psig
9700 Series
When the process is mean — strong acids, hot brine, abrasive slurries.
- Temp
- −65 °F to 500 °F
- Pressure
- Full vacuum to 50 psig
AST60
Drop-in cartridge seal for ANSI B73.1 chemical process pumps.
- Temp
- −40 °F to 450 °F
- Pressure
- Vacuum to 250 psig
Chopper Seal
Engineered for the 3,600 RPM chopper, not adapted from a slow-speed seal.
- Temp
- −10 °F to 350 °F
- Pressure
- Vacuum to 15 psig
03Industries served
From a sanitary dairy line
to a fly-ash conveyor.
Each industry page covers the failure modes specific to that service, the documentation we ship, and the series we recommend. Find your industry — or call us if your service is something nobody else will quote.
Food Processing
Sanitary, washdown, FDA-grade — for the production line that runs three shifts.
Pharmaceutical
USP Class VI elastomers, sterile filtration, and the documentation a 21 CFR Part 11 audit requires.
Chemical
Strong acids, oxidizers, chlorinated solvents — sealed by Hastelloy and FFKM.
Cement & Gypsum
Abrasive, hot, dusty — built for the kiln-feed conveyor and the gypsum mill.
Metal & Aggregate
Frac sand, alumina, slag — the most abrasive bulk-handling service in industry.
Pulp & Paper
Black liquor, white water, lime mud — the classic large-shaft sealing problem.
Lithium-Ion Battery
NMC slurries, lithium hydroxide, electrolyte — the new gigafactory sealing problem.
Mining
Flotation, thickener, hydrometallurgy — heavy slurry on big shafts.
04In the field
12 months leak-free in a 24/7 chocolate conche.
A Pennsylvania chocolate manufacturer was replacing rope packing on their longitudinal conche shaft every six weeks — eight hours of downtime per change, plus product loss. We installed a 7800-FDA in March; they have not opened the gland since.
- Hours saved
- 384/yr
- Days leak-free
- 365+
- Operator interventions
- 0
We replaced the rope packing on this conche eight times in the year before we installed the CinchSeal. Twelve months later we haven't touched it. The cost of one unscheduled outage paid for the seal — twice.
Plant Maintenance Manager
Pennsylvania confectionery producer · 24/7 conche operation · 7800-FDA install
05References
The tools our engineers send
to plant teams every day.
Full product catalog
Every series, every variant. Dimensional drawings and bolt patterns. Same as the printed.
Download PDFSizing guide for screw conveyors
Identify CEMA stuffing-box pattern, measure shaft, select 7500 or 7800 — five steps.
Open guide7500 retrofit walkthrough
End-to-end install on an existing CEMA-pattern screw conveyor. Filmed on the bench.
Watch videoSized in 24 hours
Tell us your equipment. Get a seal recommendation.
Send us shaft size, temperature, pressure, and the media you handle. A CinchSeal application engineer responds with a sized series, materials, and pricing — typically within one business day.