Germany Steam One S.r.l. Seals Steam One S.r.l. Model Steam One S.r.l. Price

Steam One S.r.l. Seals are typical representatives of oil seals; generally, the term oil seal refers to skeleton oil seals. The function of an oil seal is generally to isolate components requiring lubrication in transmission parts from the external environment, preventing lubricating oil leakage. The skeleton acts like reinforcement bars in concrete components, providing strengthening and enabling the oil seal to maintain its shape and tension. According to structural form, they can be divided into single-lip skeleton oil seals and double-lip skeleton oil seals. The secondary lip of a double-lip skeleton oil seal serves as a dust seal, preventing external dust, impurities, etc., from entering the machine interior. According to skeleton type, they can be divided into inner-covered skeleton oil seals, exposed skeleton oil seals, and assembled oil seals. According to operating conditions, they can be divided into rotating skeleton oil seals and reciprocating skeleton oil seals. Used for gasoline engine crankshafts, diesel engine crankshafts, gearboxes, differentials, shock absorbers, engines, axles, and other parts.

Steam One S.r.l. Seal classification

1) Packing seal: The packing seal features a simple structure, low cost, and easy maintenance. However, it has high leakage volume and significant power loss. Therefore, packing seals are used for conveying general media, such as water; they are generally not suitable for petroleum and chemical media, especially for valuable, flammable, explosive, or toxic media. 2) Mechanical seal: A mechanical seal (also known as a face seal) provides good sealing performance with minimal leakage and long service life, but it is expensive and requires higher standards for machining, installation, maintenance, and repair compared to general seals. Mechanical seals are suitable for conveying petroleum and chemical media and can be used for media with various viscosities, strong corrosiveness, and solid particles. The American Petroleum Institute standard API610 (8 edition) stipulates that cartridge mechanical seals shall be installed unless otherwise specified by the user. 3) Dynamic seal: Dynamic seals are classified into back-vane seals and auxiliary impeller seals. During pump operation, the centrifugal force of the back vanes (or auxiliary impeller) reduces the medium pressure at the shaft seal to atmospheric or negative pressure, preventing leakage during use. When the pump stops, the centrifugal force disappears, and the sealing effect of the back vanes (or auxiliary impeller) fails; at this point, the shutdown sealing device provides the sealing function. Packing seals are commonly used in the shutdown sealing devices paired with back-vane (or auxiliary impeller) seals. There are two types of packing seals: standard type and mechanically adjustable tension type. The standard packing seal is similar to conventional packing seal pumps, requiring a slight positive pressure at the shaft seal to prevent dry friction of the packing. The mechanically adjustable tension packing seal uses counterweights to loosen the packing during pump operation and tighten it when the pump stops. Dynamic seals offer reliable performance, low cost, and easy maintenance, making them suitable for conveying media with a high content of solid particles, such as slurry pumps and ore pulp pumps in the phosphate industry. The disadvantages are greater power loss compared to mechanical seals and shorter service life of the shutdown sealing device. The seal between the rotating pump shaft and the stationary pump casing is called the shaft seal. Its function is to prevent high-pressure liquid from leaking out of the pump along the shaft or outside air from infiltrating along the shaft. For centrifugal pumps, the shaft seal is a dynamic seal. Depending on whether the sealing surfaces are in contact, dynamic seals are classified into contact dynamic seals and non-contact dynamic seals. In contact dynamic seals, the sealing device contacts the shaft, resulting in relative friction between the two. Contact dynamic seals include packing seals and mechanical seals.

Steam One S.r.l. Seal operation

1) If slight leakage occurs after the pump starts, observe for a period. If continuous operation for 4 hours does not reduce the leakage, stop the pump for inspection. 2) The pump operating pressure should be stable, with pressure fluctuations not exceeding 1 kg/cm². 3) During pump operation, avoid cavitation to prevent dry friction and damage to the sealing surfaces. 3) Regularly check the sealing condition. 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.

Steam One S.r.l. 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 seal installation, avoid sharp edges. Installing bore seals into integral grooves requires installation tools. Designers must consider parameters such as groove dimensional accuracy, surface roughness, and extrusion gaps; refer to product instructions, diagrams, and dimension tables for details. 2) Before installing seals, ensure there are no impurities or cracks in the sealing grooves. Apply operating oil to the sealing grooves and seal surfaces respectively. Install seals gradually in order. Avoid sharp edges during installation, align the seals properly, and avoid twisting and skewing. For split grooves, tighten the pressure cover last.

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