Power piston rings :
  • Features
* OEM manufacturer
 * Unparalleled Experience
* Individually cast rings
* Double disc grinding for excellent    flatness and finish control
* Precision machining and forming
* Proper “unit pressures”
* Multitude of designs and materials
* Larger inventory
* Single source of supply
  • Benefits
* Accurate specifications for each application
 * Highest quality
* Optimum wear characteristics and physical properties
* Assures grove fit and seal
* Precise shape seals completely against cylinder bore
* Highest efficiency, longest life
* Solves your toughest problems
* Virtually eliminates backorders. Dependable
* Simplifies quotes and ordering. All parts in one purchase order and shipment
  • Power piston rings
Power piston rings are the most important parts in an engine. Although simple in appearance, the piston ring has demands placed on it unlike any other engine component. It must be tight enough to prevent combustion gases from exhausting into the crankcase and to prevent crankcase oil from entering into the combustion chamber, yet loose enough to allow a film of oil to form on the cylinder wall to combat ring and cylinder wear. The power piston ring’s environment deals out incredible punishment withstanding a controlled explosion that creates pressures up to 850 pounds per square inch and temperatures exceeding 1800 F.
  • Top compression rings
With the primary function of sealing combustion gases, top compression rings are subjected to the most severe operating conditions.
Aeroflon supplies a multitude of different designs, for both two and four cycle engines.
 
In addition to standard cast iron and ductile iron rings, for improved wear and scuff resistance, hard chromium plating, siltex groove filled and bronze insert designs are available. Siltex and bronze insert rings are normally used in chrome plated cylinder bores, while chromium plated rings are used only in plain bores.
  • Intermediate compression rings
These rings serve a dual purpose: controlling and metering lubricating oil along with sealing combustion gases. As with top compression rings, all types of cross section configurations are available, with taper face, twist designs being the more common. Wear and scuff resistant O.D. coatings are not normally used.
  • Oil rings
The oil ring is, in many ways, the most critical component of the ring complement. The design and manufacture has to assure a ring that gives maximum oil control while metering just the proper amount of oil to prevent excessive wear and scuffing.
 
Muskegon’s expander backed oil rings use the equalizer circumferentially compressible expander, a unique patented design that has excellent tension stability, oil drainage and fatigue resistance. Made from either heat-treated high strength steel or work harden able stainless steel, the expander uniformly gives the proper tension throughout its long engine life.
 
The cast iron component of the oil ring assembly features maximum oil drainage and oil scraping lands of the exact width for correct ring assembly unit pressure.
 
With the gap-pinned feature of the Equalizer, oil ring installation is trouble free.
  • Sealing rings
While sealing rings are furnished in sizes and types too numerous to list, the following is most commonly used.
  • Angle seal sealing rings
This design is recommended when maximum sealing is required in a more typical environment. It’s an exacting ring to manufacture, requiring a high degree of expertise.

Made from alloyed cast iron, this directional seal gives excellent performance in such applications as hydraulic and gas cylinder, and high-pressure compressors.
  • Compressor rings
Aeroflon offers a great variety of compressor ring designs and sizes. Ting designs from angle seals to simple rectangular cross sections are widely used and readily available. Oil rings can be supplied in either cast iron or multi-piece steel designs (depending upon size.)
  • Material specification
(MED 47A) alloyed grey cast iron

This material is widely used for automotive sealing and compressor rings of less that 10” diameter and ¼” width. It’s a high alloy, non-heat treated cast iron with a pearlitic matrix, evenly dispersed graphite flakes, and a minimum free ferrite.

(MED 47F) Alloyed grey cast iron (for larger rings)
Used for the larger piston rings, this material has a microstructure of well-distributed flake graphite with a matrix of lamellar pearlite and no more than 5% free ferrite. The rings are individually cast, giving an excellent wear and scuff resistant material.

(MED 47G) Pearlitic Nodular cast iron

When the application demands a high strength material with good wear characteristics, this nodular iron is recommended.
Individually cast and not heat treated, this material has the spheroidal graphite typical of nodular iron, but combines it with a good wearing pearlite matrix.

(MED 47 L) Ferritic Nodular cast iron
With high strength for breakage resistance, this ferritic nodular is used for rings that have a wear resistant coating, such as chromium. While as strong as the pearlitic nodular, the wear characteristics are not as good. This material is also individually cast, and not heat treated and is characterized by the speroidal graphite and a matrix of predominately ferrite.
  • Quality
Quality begins with the best possible castings. Pedrick castings are quality assured by precise engineering, chemistry, and vast experience. Pedrick’s wide experience and research have developed advanced molding techniques for superior quality piston ring castings.
Pedrick uses the best possible materials specific to each ring size and application. Chemistry is carefully tailored to ring size, allowing for different cooling rates, therefore achieving the best casting. Individual casting yields a controlled microstructure with the best possible wear characteristds. Casting individually overcomes excessive ferrite, which would cause poor scuff resistance, low tensile strength, and excessive wear.
Both human and electronic eyes analyze and inspect every stage, including : emission spectograph tests of constituent element, X-ray to probe internal structure, and physical tests of tnsile strength, elasticity and hardness. Before a ring is packaged, it has passed 25 or more precise machining operations, nine different rigid quality control checks and four final inspections.
  • Superior design
Superior pedrick designs result from years of in depth operational testing. Significant to industrial applications is the tapered face ring which seats faster for quicker start up efficiency.
  • A wide variety
A variety of design configurations and materials includes: regular cast iron, high-strength ductile iron, and wear improvement castings such as chrome, and bronze. Plasma spray availability can provide a more advanced coating for your difficult service challenge.
   
     
     
   
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