When assembling mechanical seals, special attention should be paid to the possibility of damaging the lapped slide ring surfaces and elastomer seal elements. The cartridge seal cannot be miss installed. PREPARE PUMP 1. Dirty work surface/hands. Copyright © 2019 John Crane SINCE 1977 WE HAVE BEEN REPAIRING MOST SIZES AND TYPES OF INDUSTRIAL PUMPS. It requires sliding the gland over the shaft, tightening the gland bolts, using an allen wrench to tighten the set screws to the pump shaft, and removing the setting clips. The U.S. Department of Energy's Office of Scientific and Technical Information Delivering innovation and service to help you succeed. DEMAND U.S. SEAL MFG. In others seals must be designed for evolving industrial demands. Mechanical seals … Seal Application Data Form to help the make sure the mechanical cartridge seal fits the pump. Cartridge Seals are pre-assembled package of mechanical seal components making installation much easier with fewer points for potential mechanical pump seal installation errors to occur. What determines the amount of time a seal will last is selecting the right seal material combination for the application. Mechanical seals utilize 3 component parts: Cartridge seals are by far the easiest seal to install. There are primarily 2 types of Seals … Clean and inspect pump parts. In mechanical seals, in addition to the closing force generated by the springs or bellow, an hydrostatic force generated by the fluid pressure acts on the seal ring. Every centrifugal pump must accommodate a spinning shaft while mechanically maintaining fluid or gas contained in the “wet end” of the pump. Ceramic for simple water (or anti-freeze in the case of automotive applications). We offer both General Service Metal Bellows seals, and Hastalloy or AM350 bellows. ABS USA PS-851 3/4 A 1 1.375 BCFJF 11107939 PS-446 1-3/4 C 1 2.500 BCFJF 11116013 PS-267 2 C 1 2.750 BCFJF 11116014 PS-1679 2-1/4 C 1 3.125 BCFJF … Correct seal setting is important in the successful operation of a mechanical seal. An end-face mechanical seal, or a mechanical end-face seal, also referred to as a mechanical face seal but usually simply as a mechanical seal, is a type of seal used in rotating equipment, such as pumps, mixers, blowers, and compressors. Mechanical seals are engineered for most pumps, mixer and agitator applications in maintenance. • The assembly is “pre-set” so that no installed length calculations must be performed for determining where to set the seal. For critical applications double mechanical seals are usually recommended. Seal pots can not only provide a lubricating buffer, but they can also heat or cool the barrier fluid they contain. It requires sliding the gland over the shaft, tightening the gland bolts, using an allen wrench to tighten the set screws to the pump shaft, and removing the setting clips. This allows for a shaft to spin, while a seal is being maintained mechanically. and should be considered prior ro ordering the seal. The Beauty of cartridge seals are they are self-contained. We make the world safer, healthier and more efficient. Every other leak path within the mechanical seal is blocked with the use off a gasket, o-ring, wedge (Rubber, PTFE or Flexible Graphite). Helping solve the world's challenges. PUMP MANUFACTURERS’ CROSS-REFERENCE. and provides a detailed Mechanical Seal Classification. The rule of thumb is a mechanical seal should have no more than .003" of run out per inch of shaft. Special mechanical seals can be furnished to meet the most demanding of industrial applications considering pressure, temperature, speed or fluid. Standard mechanical seals can suit most requirements to temperatures of 500 degrees F and shaft speeds to 3600 RPM. View Files. These lapped faces run against each other, one rotating with the shaft and the other stationary with the equipment housing. It is very difficult for leakage to occur (beyond a vapor) if installed properly and in good condition. Try. Innovating for our customers. Mechanical seals consists primarily of a rotary seal face with a driving mechanism which rotates at the same speed as the pump shaft, a stationary seal face which mates with the rotary and is retained using a gland or in some pump models an integral stuffing box cover, a tension assembly (utillizing springs or a metal bellows) keeps the rotary face firmly positioned against the stationary face preventing, excluding, and containing contamination and leakage, both when the pump is not in operation and when the pump shaft is rotating. Cartridge seals unitize the complete seal assembly on a sleeve such that the entire seal is installed simultaneously. The choice of what is the best depends on the temperature, and nature of what is being sealed (viscosity, abrasiveness, weight (is it a slurry?)). On a two inch pump shaft, .006" would be there permissible run out. The mechanical seal assembly 10 comprises a rotating seal assembly 26 in a cavity 28 in the housing 22, and a non-rotating or stationary seal assembly 30. The seal plan assembly ordering numbering structure allows users to select a variety of configurations and additional system components to meet specific site or application requirements. The problem-solving nature of innovation often manifests as improvements to existing solutions. This allows a shaft to turn while maintaining a seal. The problem-solving nature of innovation often … 2. When installed properly, in the right application, seals often run for as long as 20 years. Mechanical Seal, Seat Assembly: Amazon.ca: Tools & Home Improvement. You can also order our cartridge seals on line. Dhaouadi Taher. Misalignment, shaft deflection, and break away shock loading can all damage a mechanical seal.
2020 mechanical seal assembly