Germany egomat seals egomat models egomat prices

egomat seals utilize the "container" concept from transportation to create cartridge seals. The rotating and stationary parts of this seal are pre-assembled into a single unit before installation. After passing inspection and pressure testing, the unit is mounted on the shaft within the stuffing box, fixed to the shaft with set screws, and the gland bolts are tightened. Once the cartridge positioning tabs are removed, the mechanical seal is in a parallel face operating state and ready for service. This approach not only simplifies assembly but also ensures assembly quality. Welded metal bellows mechanical seals are all made as cartridge seals, offering the aforementioned advantages. Cartridge seals are also a type of cartridge mechanical seal. In this seal, the stationary ring, rotating ring, sleeve, gland, and auxiliary seals are all assembled together on a sleeve before installation, facilitating inspection of assembly quality. After passing inspection, simply tighten the seal cover and secure the screws. This pre-assembled, inspected, and tested seal component makes it easy to ensure installation and assembly quality.

egomat seal functions

Prevent high-pressure liquid from leaking out of the pump and prevent air from entering the pump. Although the shaft seal occupies a relatively small position in the pump, the normal operation of the pump is closely related to the shaft seal. If the shaft seal is improperly selected, it will not only require frequent maintenance during operation and cause significant leakage of the conveyed liquid, but may also cause fires, explosions, and poisoning accidents due to the leakage of flammable, explosive, and toxic liquids, with unimaginable consequences. Therefore, the shaft seal structure must be reasonably selected to ensure the safe operation of the pump. 1) Since the pressure inside the cylinder is not equal to the external atmospheric pressure, steam inside the cylinder or air outside the cylinder will inevitably leak out or in along the radial gap between the main shaft and the cylinder, causing working fluid loss, worsening the operating environment, and heating the shaft journal or allowing steam to enter the bearing chamber, causing oil deterioration. Air leakage also destroys the vacuum, thereby increasing the exhaust load, which reduces unit efficiency. For this reason, shaft seals are installed where the rotor passes through both ends of the cylinder. This type of shaft seal is called an end shaft seal, abbreviated as shaft seal. High-pressure shaft seals are used to prevent steam from leaking out of the cylinder, and low-pressure shaft seals are used to prevent air from leaking into the cylinder. 2) During turbine operation, a portion of the steam will inevitably leak from the shaft end to the atmosphere, causing loss of working fluid and heat, and also affecting the working environment of the turbogenerator. If adjustment is improper and excessive steam leakage occurs, it will also cause the temperature of the bearings near the shaft seal to rise or water to enter the bearing oil. For this reason, shaft seal heaters are installed in various units to recover and utilize the shaft seal leakage steam from the turbine. 3) Prevent steam inside the cylinder and valve stem leakage from leaking outward, polluting the turbine room environment and bearing lubricating oil quality. Prevent high-temperature steam from flowing over the turbine main shaft during normal unit operation, causing it to heat up and thus causing bearing overheating. Prevent air from leaking into the vacuum part of the cylinder. Ensure condenser vacuum effect and degree during unit startup. Recover shaft seal and valve stem leakage to reduce working fluid and energy losses. 4) During turbine tripping shutdown and the entire hot shutdown process where the condenser needs to maintain a vacuum, prevent air from leaking into the turbine, accelerating internal cooling of the turbine and causing main shaft bending.

egomat seal replacement steps

1) Remove the main pulley (belt drive) and remove the key pin; 2) Use a pin puller to remove the positioning pins of the shaft seal end cover; 3) Remove the fixing screws of the shaft seal end cover; 4) Use a circular external puller to remove the sleeve (if no puller is available, cut a slot on the sleeve with a cutting machine and knock it down with a chisel; note to block sand with something to prevent it from getting into the screw threads); 5) Remove the old shaft seal; 6) Clean the end cover shaft seal and bearing positions, then clean with 755; 7) Apply 638 adhesive to the shaft seal installation position, then carefully install the shaft seal; be careful not to damage the rubber lip; you can apply a little oil or high-temperature grease to the rubber surface of the shaft seal; 8) After cleaning the sleeve position, reinstall and fix the end cover securely (you can wrap a layer of thick glossy paper around the shaft to prevent the shaft seal lip from accidentally touching the keyway during end cover installation); 9) Clean the new sleeve and installation position, apply fixing adhesive 638 to the inner circle of the sleeve. Cold fit: Use a force bar to evenly knock the sleeve in; place an outer ring of the same size outside the new sleeve to cushion the knocking to avoid damaging the sleeve. Hot fit: Clean the inside of the sleeve thoroughly; there must be no oil. Apply a ring of 638 adhesive to the shaft journal before the shaft seal, heat the sleeve to 110 degrees, and install it. (Note: Push the sleeve to the edge of the shaft seal, pause briefly. Wait for the temperature to drop before pushing it into the shaft seal position; 10) Install the pulley or coupling, correct parallelism or centerline, and manually reverse the head so that lubricating oil returns to the front bearing and shaft seal.

egomat seal installation technical requirements

Mechanical seals are high-precision mechanical components, and their correct installation and operation have a significant impact on their service life. We generally follow the standards prescribed by the Ministry of Petrochemical Industry. The technical requirements for the pump installing the mechanical seal and the parts mating with the mechanical seal are as follows: 1) Shaft runout: maximum not greater than 0.05 mm; 2) Rotor swing: near the sleeve at the rotating ring seal ring location, not greater than 0.06 mm; 3) Axial shaft movement is not allowed to exceed ±0.5 mm; if a 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: face runout<0.05, radial runout<0.10) 5) Concentricity tolerance of the gland (stationary ring seat) mating spigot relative to the shaft centerline is 0.05 mm; perpendicularity tolerance of the surface contacting the gasket relative to the centerline is 0.03–0.05 mm; if requirements are not met, the seal chamber must be machined; 6) The end of the sleeve where the rotating ring seal ring is installed, and the end of the gland (or housing) where the stationary ring seal ring is installed, should be chamfered and smoothed. 7) Be careful when installing and removing mechanical seals; strictly prohibit using hammers and flat chisels to avoid damaging seal elements. If scale prevents removal, clean thoroughly before disassembly. 8) If mechanical seals are used at both ends of the pump, take care during assembly and disassembly to avoid neglecting one side for the other. 9) For mechanical seals that have been in operation, if gland loosening causes seal movement, the stationary and rotating ring parts must be replaced and should not be retightened for continued use. Because after loosening, the original operating trajectory of the friction pair will change, and the sealing of the contact surface is easily compromised.

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