SAE J1245:2002 pdf download

SAE J1245:2002 pdf download Guide to the Application and Use of Engine Coolant Pump Face Seals
1. Scope—This SAE Recommended Practice is intended as a guide in the usage of mechanical face seals for the engine coolant pump application. The main purpose of the document is to fill the void caused by the lack of a ready source of practical information on the design and use of the engine coolant pump face seal. Included in the document is a compilation of present practices, as in a description of the various types of seals, material combinations, design data, tolerances, drawing format, qualification and inspection information, and quality control data. The terminology used throughout the document is recommended and, through common usage, is hoped to promote uniformity in seal nomenclature.
2. References
2.1 Applicable Publications—The following publications form a part of this specification to the extent specified herein. Unless otherwise specified, the latest issue of SAE publications shall apply.
2.1 .1 SAE P UBLICATIONS —Available from SAE, 400 Commonwealth Drive, Warrendale, PA 1 5096-0001 .
SAE J1 1 1 c—Seals—Terminology of Radial Lip
SAE J780—Engine Coolant Pump Seals
SAEPaper 6601 28—Fluid Performance of Factory-Installed Antifreeze Coolants in Passenger Car Service, E. Beynon, 1 966
SAE Paper 760631 —Engine Coolant Performance in Late Model Passenger Cars, N. E. Payerle, 1 976 SAEPaper 890609—Effect of Additives in Cooling Water on Sealing Performance of Water Pump Seals of Automotive Engines, K. Kiryu et al., 1 989
2.1 .2 ANSI P UBLICATION —Available from ANSI, 25 West 43rd Street, New York, NY 1 0036-8002.
ANSI B46.1
2.1 .3 ASTM P UBLICATION —Available from ASTM, 1 00 Barr Harbor Drive, West Conshohocken, PA 1 9428-2959.
ASTM D 1 41 8—Practice for Rubber and Rubber Latices—Nomenclature
2.1 .4 STLE P UBLICATION
STLE Paper 88-AM-5E-1 —An Investigation of Scale Deposits on the Sealing Surfaces of End Face Seals for Water Pumps, K. Kiryu et al., 1 988
3. Seal and Mating Ring Types—The mechanical face seal assemblies utilized in automotive and other heavy- duty vehicle engine coolant pumps consist of a seal head assembly and a mating ring. Although many variations of face seal designs exist, only one basic concept is predominantly applied; the single helical spring preload concept. Preload is defined as the force applied to the primary seal ring, when located in its normal operating position, to prevent separation of the sealing interfaces during the anticipated duty cycle.
3.1 Single Helical Spring-Loaded Type Seal—This seal type is the most commonly utilized concept for preloading engine coolant pump mechanical face seals. The assembly generally consists of a cartridge, bellows, spring, ferrule(s), and primary seal ring (see Figure 1 , SAE J780). Force is applied to the primary seal ring by the compression of a single helical coil spring between the cartridge and primary seal ring during installation of the seal head assembly to its proper operating length. The bellows allows the primary seal ring to move axially, thus compensating for wear without loss of its sealing ability. Ferrules may be used to provide a contact surface for the spring and secondary sealing functions. Under normal operating conditions and with proper materials selection, this design is generally resistant to corrosion, abrasion, time-temperature, and coolant exposure effects. 3.2 Unitized Type Seal—The unitized seal consists of a seal head assembly and the mating ring, constructed so as to be handled as a single piece. The unitized seal generally consists of a cartridge, bellows, spring, ferrule(s), primary seal ring, secondary drive seal, mating ring, and unitizer (see Figure 2, SAE J780).