Since 1958 PPC has developed engineered seals for just about every conceivable piece of rotating equipment. As an American made and Employee-Owned company, PPC takes great pride in delivering solutions where competitors have failed to meet the challenge or fallen short of the target. We have a tremendous advantage with our design team and have a significant history with a multitude of designs and styles. We are not locked into one type of face geometry or legacy products in a catalog. We combine our experience with the latest in computer and virtual technologies in our design process, including but not limited to Finite Element Analysis (FEA), Pressure Velocity software, Thermal Generation (prediction) software, and software for designing gas seal groove profiles to give you the optimal solution for your plant. Our size, the tenure of our people, and the experience of 6 decades of sealing gives us the edge in responsiveness, quality of design and the delivery of your sealing solution for the right price.
Reactor/Mixer/Agitator Autoclave Seals
PPC manufactures and repairs a complete line of seals for reactors, mixers, agitators, and autoclaves. They include single seals, double/tandem seals, dry running seals, pharmaceutical seals, seals with bearings internally, large diameters, special metallurgies, etc. PPC specializes in the design and upgrade of your seals. PPC can upgrade your seal to a double balanced design to further increase the seals performance (normally in the same housing). We are also able to upgrade with pumping rings, bearings, cooling jackets, dry running conversions of both contacting and noncontacting varieties. These seals are usually found on SPX (Lightnin and Plenty) Mixers, Chemineer, Philadelphia, Pfaudler, Ekato, De Dietrich, Jensen, Mixco, and many others.
PPC has manufactured seals for slurry applications for over 50+ years. Slurries can be found in almost all industries with numerous properties. Most people associate slurries with the mining industry, however, we find slurries in API, petrochemicals, waste water treatment, all facets of everyday life. PPC has manufactured seals for the following applications and industries: tailings, mining, waste treatment, sludge, ash, coal, FGD, lime, potash, mash, coatings, clay, starch, paper stock, river water, liquor (black, white, green), evaporators, bauxite/alumina, salt, minerals, corn processing, crude, food grade, sugar, sugar refining, Uranium, Copper, tar sands, gypsum, calcium and de-watering. Diamond faces are available for extreme applications.
Boiler Feed Seals
PPC’s experience with boiler feed applications is extensive. Boiler feed applications have been misunderstood for years. The optimum configuration for a boiler feed application is a high-pressure seal with a restriction bushing, multi-port injection, and an API Plan 23 heat exchanger. This allows for optimum cooling and maximum life on the mechanical seal. Multi Pass Cooling (API Plan 23) allows for maximum cooling in the mechanical seal stuffing box. The second choice would be an API Plan 21 with a heat exchanger coming from the discharge side of the pump to cool and raise the pressure in the stuffing box to increase the vapor margin. PPC can offer a plan to upgrade your existing seals with Lube Groove or Hydro Pad technologies at a reduced cost resulting in improved MTBF.
PPC has manufactured gas seals for a few decades now. PPC offers the entire gamut of gas seals: double, tandem and singles for liquid, gases, and cryogenics. We offer non-contacting lift off seals in both Uni-directional and Bi-directional configurations. Dry running contacting seals with or without Diamond Face technology. Gas sealing technology has many benefits over conventional wet seals: no product emissions, dry running, no product contamination, no heat (non-contacting), negligible power consumption, the ability to withstand extreme conditions (cavitation, dry running), simple support systems, and low maintenance. Dry contacting gas seals also give you the benefit of zero leakage of any product or barrier/buffer gases.