Field Services and
Engineering Team have been on hundreds of calls for all types of food processing equipment
service. Seal issues are one of the common requests for service. Here’s the top 3 trouble
signs for split seal types and how to troubleshoot repair.
escapes or purges out of the seal
- Loss of vacuum
- Grooved or
- A broken seal
- Missing packing
Grooved or Broken Shaft
A worn shaft may cause a loss of vacuum in your equipment. Depending on the space available
and the extent of the damage, a worn shaft may 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 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
Seals and Missing Packing
Seals should be checked for wear and sanitized daily. Seals should also be part of your
preventative 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 shutting down production to replace a seal.
Seals must be correctly installed with recommended packing. Check to make sure that the seal
housing is within tolerance. Revisit the documentation for seal installation instructions.
If you have new staff, ask for a training session by Mepaco®’s Field Services experts to
have them watch and advise on seal installation and
equipment features one of three types of seals: Split Seal, Air-Purge Seal, and Mechanical
Seal. Each seal is specified for the best use in the type of processing
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) processes.
Air-purge Seal: These seals are
often specified for applications with high food safety risks 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 sanitation costs.
Mechanical Seal: This type of
seal is suitable for applications with coarse, gritty food product. These seals are
precision-installed and are not forgiving with tolerance. Mechanical seals are engineered
for CIP (clean-in-place) sanitation processes.