What We Do


We manufacture our own complete line of Cartridge, Assembly style Mechanical Seals for Industrial Pumps, Compressors, Mixers, Agitators, Reactors and Beadmill units.

We can repair / replace all makes & models of Mechanical Seals used on Pumps / Compressors / Mixers / Agitators / Reactors & Beadmill units. Custom Design / Manufacture Mechanical Seals for any application to increase run cycles. Provide Fluid Sealing Solutions for all industries.

We also provide Custom Engineered parts made from Tungsten Carbide, Silicon Carbide, Ceramic - for use in Shaft Steady Bushings / Wear Plates and many other industrial applications.


80mm Netzsch Double Mill Seal sent in for overhaul from chemical plant in Kentucky.
This unit had Silicon Carbide vs Silicon Carbide on both the product side and the outer end.
The Silicon Carbide seal faces & seats were chipped / cracked around the drive pin slots.
We advised the customer to upgrade material of construction to Tungsten Carbide which
is less prone to chipping / cracking. The end user agreed and we had new seal faces and
seats manufactured. Seal was repaired and pressure tested to 80 PSIG. Unit is now
back in operation.

Netzsch Mill Seal
Netzsch Mill Seal Stationary Faces
Netzsch Seal Repaired by Robco of America
Netzsch Seal Repaired by Robco of America

3.00” Double Mixer Seal sent in for emergency repair from chemical plant
in Pasadena Texas. Rotary Silicon Carbide seal faces were worn & chipped out. Stationary
product end Silicon Carbide seat was worn and chipped.

Rotary seal sleeve was worn and pitted on o’ring sealing surfaces, new sleeve required.
This seal has Kalrez o’rings on product end due to elevated operating temps. (+400F).
Robco of America had a repair kit on the shelf for this emergency overhaul. Seal was
turned around in (2) working days.

Double Mixer Seal
Mixer Seal Needs Repair

Chemical plant in North Carolina sent a failed 100mm Double Mixer Seal in for replacement.
We reverse engineered and provided a replacement mechanical seal unit. We upgraded the
product side seal faces to Tungsten vs Silicon from original Silicon vs Carbon. Seal has
been back in operation for 2 yrs.


Robco manufactured a new 4.00” double seal unit and reverse engineered the worn out
lower shaft steady bushing assembly. Robco oversaw the installation of both the
seal & bushing unit.


3.75" Robco EV05 single spring cartridge seals installed on (2) split case pumps – ready
to transport to North Carolina.


1.75" Robco seals being installed at airport fuel depot in Louisiana.


Thrust bearing & Pivot shoe set repaired & relapped flat within two Helium Light bands
for Deepwell Submersible Pump operating in Gulf of Mexico.


4.00" Robco EV07 Double Cartridge Seal being installed on a Reactor unit at a
chemical plant in south Texas.