Some tips are also stellited.Īssured Quality ISO 9002 and QS9000. Welded wafer tips to resist friction of dynamic load. Stellited seats where required (denoted by an "S" suffix), to avoid corrosion caused by combustion gases. Hard chrome-plated stems where required, to reduce stem wear.
On Heavy Duty applications we also offer bi-metallic construction to gain the best properties of two different OE spec materials for thermal resistance (head) and mechanical resistance (stem and tip). These OE spec materials are designed to handle the extreme hostile environment of engines at full operating temperatures. One-piece construction for most applications. These include carbon steel, martensitic steel with chrome and silicon, stainless martensitic, stainless austenitic, Inconel and Nimonic. 2006 = 2.006 inches.Ī variety of alloys to suit all applications. "22-" Prefix: The 4-digit part number is the actual O.D. of the seat is increased by the press fit for aluminum heads - 0.007 inches. "21-" Prefix: The 4-digit part number is the cutter size as above. of the seat is increased by the press fit for cast iron heads - between 0.0045 and 0.006 inches. "20-" Prefix: The 4-digit part number is the cutter size. Also, all seats have a fully finished inside diameter to assist gas flow and swirl. Q, N, and S series inserts are individually cast and have a true radius on the lead-in edge to facilitate the press fit. A cobalt-based alloy used in a very limited range of specialized applications where additional abrasion resistance is necessary. Our austenitic (non-magnetic) nickel-based alloy designed for natural gas, LPG, propane, and other extreme heat applications.ĭenoted by the suffix "N".
All 20- and 21- prefixes without a suffix are cast in Q material. Our high-chrome alloy designed for unleaded fuels which enables Rockwell Rc40 hardness combined with easy machinability.įeatures excellent resistance to high temperature corrosion in applications to 1150☏.
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