ASI designs and manufactures mechanical seals to meet a broad range of industrial applications.


585mStationary Design- The Model 585 derives sealing face alignment from the pump shaft, not the stuffing box face, creating perfect sealing face squareness automatically upon installation.

Drive Mechanism- ASI’s patented Safe-T-Studs™ transmit drive torque from the shaft to the seal from the inside of the seal, preventing seal damage, misalignment and accidental loosening common with other torque systems.

Reduced Spring Tension- During service, the Model 585’s piston device forces springs into their drilled recesses eliminating spring fatigue, vapor deposits and uneven face wear. This feature reduces spring tension at low pressures and eliminates spring load completely at stuffing box pressures greater than 50 p.s.i.


595m The ASI Model 595 offers a patented self-circulation heat removal system; the first seal pumping system that actually removes heat from the sealing faces while providing maximum movement of liquid within a compact design.

Pumping Device- The self-circulation device extends the full distance between the inboard and outboard seal faces, removing heat at its source and venting it into the flush outlet. This insures lubrication and cooling to both sets of sealing faces while the seal is circulating fluid.

Application Versatility- The Model 595’s pumping feature is engineered into a seal design which fits all standard ANSI pumps. This patented design also enables the Model 595 to successfully perform in vertical applications and provides ideal usage in gas pressurized barrier fluid systems.

Increased Seal Life- All of the Model 595’s o-rings and secondary sealing surfaces are virtually static under normal service conditions and are not required to adjust for misalignment. The rotary seal face o-rings (typically the “weakest link” in most pumping designs) are protected, guaranteeing optimum seal life and superior seal performance.


The Mod730mel 730 provides a superior quality, low cost alternative to “throw-away” seals. The seal’s self-contained cartridge unit and detachable seal flange allow a wide range of stocking and repair options. The reduced operating length of the Model 730 creates stronger seal parts and its stationary design delivers the performance reliability that the ASI name has come to represent.

Unitized Cartridge Seal Barrel- The convenient one-piece assembly easily detaches from the seal flange, allowing “mix and match” stocking options and simplified replacement. The removable seal flange can be reused and easily swapped out to accommodate special bolting patterns.

Monolithic Seal Faces- One piece construction allows seal faces to compensate for temperature fluctuations without the intermittent leakage caused by face distortion.

Optimum Seal Face Alignment- The combined features of the Model 730, including its stationary design, self-adjusting rotary face and uni-body sleeve construction, guarantee perfectly aligned seal faces.