German TEFLEX seals TEFLEX models TEFLEX prices

TEFLEX seals are the customary term for general seals, simply referring to lubricating oil seals. They are mechanical components used to seal grease (oil is the most common liquid substance in transmission systems, and also refers to general liquid substances), isolating the parts requiring lubrication in the transmission components from the output parts to prevent lubricating oil leakage. Seals used for static sealing and dynamic sealing (generally reciprocating motion) are called oil seals. The representative form of oil seals is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully covered by rubber; the term oil seal generally refers to this type of tc skeleton oil seal.

TEFLEX seal classification

1) Packing seal; packing seal has a simple structure, low price, and convenient maintenance. However, it has high leakage and high power loss. Therefore, packing seals are used for transporting general media, such as water; they are generally not suitable for petroleum and chemical media, especially valuable, flammable, explosive, and toxic media. 2) Mechanical seal: Mechanical seals (also known as face seals) have good sealing performance, very low leakage, and long service life, but they are expensive, and their processing, installation, maintenance, and repair requirements are higher than those of general seals. Mechanical seals are suitable for transporting petroleum and chemical media and can be used for media with various viscosities, strong corrosiveness, and containing particles. The American Petroleum Institute standard API610 (8rd edition) stipulates: Unless otherwise specified by the user, cartridge mechanical seals shall be installed. 3) Dynamic seal: Dynamic seals can be divided into back-vane seals and auxiliary impeller seals. When the pump is operating, the centrifugal force of the back vanes (or auxiliary impeller) reduces the pressure of the medium at the shaft seal to atmospheric or negative pressure, preventing leakage during pump operation. When stopped, the centrifugal force disappears, and the sealing effect of the back vanes (or auxiliary impeller) fails; at this time, the stop-sealing device provides the sealing function. Packing seals are commonly used in the stop-sealing devices matched with back-vane (or auxiliary impeller) seals. Packing seals come in two types: ordinary and mechanically adjustable. Ordinary packing seals are similar to general packing seal pumps, requiring a slight positive pressure at the shaft seal to avoid dry friction of the packing. Mechanically adjustable packing seals use counterweights to loosen the packing during pump operation and tighten it when stopped. Dynamic seals are reliable, inexpensive, and easy to maintain, suitable for transporting media containing many solid particles, such as slurry pumps and feed slurry pumps in the phosphate industry. The disadvantage is that the power loss is greater than that of mechanical seals, and the service life of the stop-sealing device is shorter. The seal between the rotating pump shaft and the fixed pump casing is called the shaft seal. Its function is to prevent high-pressure liquid from leaking out along the shaft from inside the pump, or outside air from entering along the shaft. For centrifugal pumps, the shaft seal is a dynamic seal. Depending on whether the sealing surfaces are in contact, it can be divided into contact dynamic seals and non-contact dynamic seals. In contact dynamic seals, the sealing device contacts the shaft, and there is relative friction between them. Contact dynamic seals include packing seals and mechanical seals.

TEFLEX seal operation

1) If slight leakage occurs after the pump starts, observe for a period of time. If the leakage does not decrease after continuous operation for 4 hours, stop the pump for inspection. 2) The operating pressure of the pump should be stable, with pressure fluctuations not exceeding 1 kg/cm². 3) During pump operation, avoid cavitation to prevent dry friction of the sealing surfaces and seal damage. 3) Check the sealing condition frequently. During operation, if leakage exceeds the standard, heavy oil shall not exceed 5 drops/min, and light oil shall not exceed 10 drops/min. If there is no improvement within 2-3 days, stop the pump to inspect the sealing device.

TEFLEX seal precautions

1) Before designing grooves, please carefully read the product descriptions for each series to distinguish whether the product uses an integral groove or a split groove; during the seal installation process, avoid sharp edges, and use installation tools to install bore seals into integral grooves; designers must consider parameters such as groove dimensional accuracy, surface roughness, and extrusion gaps; for details, refer to the product instructions, diagrams, and dimension tables. 2) Before installing the seal, ensure that there are no impurities or cracks in the sealing groove; apply operating oil to the sealing groove and the seal surface respectively; install the seals gradually in order; avoid sharp edges during installation, align the seal properly, and avoid twisting and skewing; if it is a split groove, tighten the pressure cover last.

Weidou Intelligent Technology specializes in selling German TEFLEX seals, TEFLEX O-rings, TEFLEX sealing strips, TEFLEX pipe seals, TEFLEX cable seals, TEFLEX rubber seals, TEFLEX mechanical seals, TEFLEX gaskets, TEFLEX oil seals, TEFLEX shaft seals, TEFLEX metal seals, TEFLEX high-pressure seals, TEFLEX spiral seals, TEFLEX centrifugal seals, TEFLEX sealing rings, TEFLEX original imports from Germany. Welcome customers to inquire and order.