QualCast Products

Valve Train Specialists

QualCast is a worldwide distributor of engine valves, valve seat inserts, valve guides, valve springs, valve spring inserts, valve keepers (cotters, keys), valve lifters, valve stem seals, rocker components, injector components, push rods and freeze plugs.

Applications are divided into 3 printed catalogs – “Heavy Duty, Agricultural and Industrial” applications are in one catalog, “Light Duty, Medium Duty, and Marine” are in a second, and the 3rd catalog contains “QualFast” and “Black Lightning” performance applications. All catalogs can be downloaded via the Online Catalog page in .pdf form, or the Online Catalog contains all applications for all type of engines. Light Duty applications can also be searched for by Year, Make, Model and Engine.

Valve Seat Inserts

Alloys "Q" Series:
Our high-chrome alloy designed for unleaded fuels which enables Rockwell Rc40 hardness combined with easy machinability.
Features excellent resistance to high temperature corrosion in applications to 1150°F. All 20- and 21- prefixes without a suffix are cast in Q material.

"N" Series:
Our austenitic (non-magnetic) nickel-based alloy designed for natural gas, LPG, propane, and other extreme heat applications. 
Denoted by the suffix "N". Rockwell Rc45 and hot hardness to 1600°F.

"S" Series:
Our stellite series. A cobalt-based alloy used in a very limited range of specialized applications where additional abrasion resistance is necessary. Rockwell Rc53. Denoted by the suffix "S".


Engineered Advantages:
Q, N, and S series inserts are individually cast and have a true radius on the lead-in edge to facilitate the press fit. Also, all seats have a fully finished inside diameter to assist gas flow and swirl.

Sizes
 "20-" Prefix:
The 4-digit part number is the cutter size. 1562 = 1.562" or 1-9/16" cutter. Actual O.D. of the seat is increased by the press fit for cast iron heads - between 0.0045 and 0.006 inches.

"21-" Prefix: The 4-digit part number is the cutter size as above. Actual O.D. of the seat is increased by the press fit for aluminum heads - 0.007 inches.

"22-" Prefix: The 4-digit part number is the actual O.D. 2006 = 2.006 inches.