200 W Industrial Drive, Beaver Dam, WI 53916 | 920.356.9900 | www.mepaco.net
The following tips are from Mepaco®’s Field
Services and Engineering Team who have been
on hundreds of calls to troubleshoot and make
repairs to seals on all types of food processing
equipment and in many applications.
First, The Trouble Signs
1 Product escapes or purges out of the seal
2 Downstream food contamination
3 Loss of vacuum
The Possible Problem
l A grooved or broken shaft
l A broken seal
l Missing packing
Grooved or Broken Shaft
A worn shaft may cause a loss of vacuum in
your equipment. Depending on the space avail-
able and extent of the damage, a worn shaft
may be able to be repaired on site.
Ignoring a grooved shaft can lead to a broken
shaft resulting in a catastrophic failure. The
timeline to order a replacement shaft may take
two to three weeks. Even if there is an extra
shaft in inventory, there is a minimum of two
days of lost production to replace it.
If you suspect a grooved shaft, call Mepaco®’s
Field Services to troubleshoot the issue.
TOP 3 SEAL TROUBLE SIGNS and HOW TO FIX IT
Product loss is a sign
of seal or shaft issues.
Excessive wear re-
sulting in grooves on
shaft caused by worn
Contact Field Services
Joe Hertel, Manager
Office: (920) 356-7334
Cell: (920) 219-2286
Monica Planasch, Manager
Office: (920) 356-7347
Cell: (920) 344-2085
PART OF THE APACHE STAINLESS EQUIPMENT CORP. FAMILY
200 W. Industrial Drive
Beaver Dam, WI 53916 USA
SPECIALISTS IN: GRINDING & BLENDING | PUMPING & STUFFING | THERMAL PROCESSING | MATERIAL HANDLING | SYSTEM INTEGRATION
9/2018 © 2018 Apache Stainless Equipment Corp.
PIP (Process Industry Standards)
Worn Seals and Missing Packing
Seals should be checked for wear and sanitized
daily. Seals should also be part of your preven-
tative maintenance program with two to four
extra seals in your parts inventory, depending
on usage. Changing the seal during scheduled
times will help save lost production instead of
seal replacement that requires a shut-down.
It is also essential that seals are correctly in-
stalled with recommended packing. Check to
make sure that the seal housing is within toler-
ance. Revisit the documentation for seal instal-
lation instructions. If you have new staff, ask for
a training session by Mepaco®’s Field Services
experts to have them watch and advise your
people on seal installation.
In review, seal performance issues can be caused
l Improper installation
l Improper and irregular seal
l Improper disassembly for sanitation
l Overuse of seal beyond life cycle
l Incorrect seal for the application
Worn and broken seal Recommended Seals
There are three types of seals that are recom-
mended by Mepaco®.
Split Seal: A split seal provides ease of
removal and installation. The construction is
made up of rubber and metal reinforcement. It
can be specified for a variety of applications. It
is easy to disassemble for sanitation and holds
up to rigorous COP (clean-out-of-place)
Air-purge Seal: These seals are often specified
for applications that have a high degree of food
safety risk and abrasive food product situations.
The internal components of the seal rotate with
the shaft, so there are no typical issues with
worn shafts or missing packing. These seals
are engineered to reduce maintenance and
Mechanical Seal: This type of seal is suitable for
applications with course, gritty food product.
These seals are precision-installed and are not
forgiving with tolerance. Mechanical seals are
engineered for CIP (clean-in-place) sanitation
Contact Mepaco®’s Field Services for answers to
your current seal issues or for a consultation for
a seal solution to fit your application.
Split Seal Air-purge Seal Mechanical Seal