German schauenburg seals schauenburg models schauenburg prices

schauenburg seals are sealing devices installed to prevent leakage between the pump shaft and the casing. Common types of shaft seals include packing seals, mechanical seals, and dynamic seals. The shaft seal of a reciprocating pump is usually a packing seal. When transporting media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly include packing seals, mechanical seals, and dynamic seals. The shaft seal of a reciprocating pump is usually a packing seal. When transporting media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly include packing seals, mechanical seals, and dynamic seals.

schauenburg 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 transporting 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, very low leakage, and long service life, but it is expensive and has higher requirements for machining, installation, maintenance, and repair compared to general seals. Mechanical seals are suitable for transporting petroleum and chemical media and can be used for media with various viscosities, strong corrosiveness, and particulate content. The American Petroleum Institute standard API610 (8 edition) stipulates that cartridge mechanical seals shall be equipped unless otherwise specified by the user. 3) Dynamic seal: Dynamic seals can be divided into two types: 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 time, the shutdown sealing device provides the sealing function. Shutdown sealing devices matched with back-vane (or auxiliary impeller) seals often employ packing seals. There are two types of packing seals: standard type and mechanically adjustable tension type. Standard packing seals are similar to those in general packing-seal pumps, requiring a slight positive pressure at the shaft seal to prevent dry friction of the packing. Mechanically adjustable tension packing seals use counterweights to loosen the packing during pump operation and tighten it when stopped. Dynamic seals offer reliable performance, low cost, and easy maintenance, making them suitable for transporting media with a high content of solid particles, such as slurry pumps and feed slurry 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 entering along the shaft. For centrifugal pumps, the shaft seal is a type of dynamic seal. Depending on whether the sealing surfaces are in contact, dynamic seals can be classified as 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.

schauenburg seal operation

1) If slight leakage occurs after the pump starts, observe it 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 and damage to the sealing surfaces. 3) Regularly check the sealing condition. During operation, if the leakage exceeds the standard (not more than 5 drops/min for heavy oil, not more than 10 drops/min for light oil), and there is no improvement within 2-3 days, stop the pump to inspect the sealing device.

schauenburg seal installation technical requirements

Mechanical seals are high-precision mechanical components, and their correct installation and operation significantly affect their service life. We generally follow the standards prescribed by the Ministry of Petrochemical Industry. The technical requirements for the parts of the pump installing the mechanical seal that mate with the seal are as follows: 1) Shaft bending: maximum not greater than 0.05 mm; 2) Rotor runout: near the shaft sleeve at the moving ring seal ring, not greater than 0.06 mm; 3) Axial shaft movement must not exceed ±0.5 mm; if a shaft sleeve is present, the sleeve must not be loose; 4) Coupling alignment error: for gear couplings, not greater than 0.08–0.10 mm (P2008C); for elastic couplings, not greater than 0.05–0.06 mm; (common practice: axial runout<0.05, radial runout<0.10) 5) The concentricity tolerance of the gland (static ring seat) and the sealing spigot relative to the shaft centerline is 0.05 mm, and the perpendicularity tolerance of the surface contacting the gasket relative to the centerline is 0.03–0.05 mm. If these requirements are not met, the seal chamber must be machined; 6) The ends of the shaft sleeve where the moving ring seal ring is installed, and the ends of the gland (or casing) where the static ring seal ring is installed, should be chamfered and smoothed. 7) Be careful when installing and removing mechanical seals; strictly prohibit the use of hammers and flat chisels to avoid damaging sealing elements. If scale prevents removal, clean thoroughly before disassembly. 8) If mechanical seals are used on both ends of the pump, take care during assembly and disassembly to avoid neglecting one side while attending to the other. 9) For mechanical seals that have been in operation, if the gland becomes loose causing the seal to shift, the stationary and rotating ring parts must be replaced and should not be retightened for continued use. This is because the original operating trajectory of the friction pair changes after loosening, easily compromising the sealing integrity of the contact surfaces.

Weidou Intelligent Technology professionally sells German schauenburg seals, schauenburg O-rings, schauenburg sealing strips, schauenburg pipe seals, schauenburg cable seals, schauenburg rubber seals, schauenburg mechanical seals, schauenburg gaskets, schauenburg oil seals, schauenburg shaft seals, schauenburg metal seals, schauenburg high-pressure seals, schauenburg spiral seals, schauenburg centrifugal seals, schauenburg sealing rings, schauenburg original German imports. Welcome customers to inquire and order.