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SAMES 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, the gland bolts are tightened, and the cartridge positioning tabs are removed. The mechanical seal then operates with parallel faces and is ready for service. This approach not only simplifies assembly but also ensures assembly quality. Welded metal bellows mechanical seals are all designed 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 single sleeve before installation, facilitating inspection of assembly quality. Once inspection is passed, 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.

SAMES seal advantages

1) Oil seals have a simple structure and are easy to manufacture. Simple oil seals can be molded in one step; even the most complex oil seals do not require complicated manufacturing processes. Metal-cased oil seals only require stamping, bonding, inlaying, and molding to combine metal and rubber into the required oil seal. 2) Oil seals are lightweight and use less material. Each oil seal is a combination of thin-walled metal and rubber components, consuming very little material, so each oil seal is very light. 3) Oil seals require small installation space and have small axial dimensions, making them easy to machine and allowing for compact machine design. 4) Oil seals offer good sealing performance and long service life. They have certain adaptability to machine vibration and main shaft eccentricity. 5) Oil seals are easy to disassemble and convenient to inspect. 6) Oil seals are inexpensive.

SAMES seal precautions

1) Preparation and precautions before startup: a. Comprehensively inspect the mechanical seal, as well as the completeness of auxiliary devices and pipeline installations, and verify compliance with technical requirements. b. Perform a static pressure test on the mechanical seal before startup to check for leaks. If leakage is significant, identify the cause and eliminate it. If this is ineffective, disassemble, inspect, and reinstall. Generally, the static test pressure is 2~3 kg/cm². c. Rotate the pump by hand according to its direction of rotation to check for smooth and uniform movement. If rotation is difficult or stuck, check for errors in assembly dimensions and reasonable installation. 2) Installation and shutdown: a. Keep the seal chamber filled with liquid before startup. When transporting media that solidify, use steam to heat the seal chamber to melt the medium. Manual rotation must be performed before startup to prevent sudden startup from causing the soft ring to shatter. b. For mechanical seals using an external flush oil system, start the flush oil system first. Stop the flush oil system last after shutdown. c. Do not immediately stop the cooling water for the flush oil chamber and face seal after stopping a hot oil pump. Wait until the oil temperature at the face seal drops below 80 degrees before stopping the cooling water to avoid damaging seal components. 3) Operation: a. If slight leakage occurs after pump startup, observe for a period. If continuous operation for 4 hours does not reduce leakage, stop the pump for inspection. b. Pump operating pressure should be stable, with pressure fluctuations not exceeding 1 kg/cm². c. Avoid cavitation during pump operation to prevent dry friction on the sealing faces and seal damage. d. Regularly inspect the sealing condition. During operation, if leakage exceeds the standard (heavy oil not more than 5 drops/min, light oil not more than 10/min), and there is no improvement trend within 2-3 days, stop the pump to inspect the sealing device.

SAMES seal installation precautions

1) Pay close attention during installation to avoid installation deviations. Tighten the gland after coupling alignment. Tighten bolts evenly to prevent gland face skewness. Check all points with a feeler gauge; the error must not exceed 0.05 mm. Check the fit clearance (i.e., concentricity) between the gland and the outer diameter of the shaft or sleeve. It must be uniform around the circumference. Check all points with a feeler gauge; the allowable error must not exceed 0.01 mm. 2) Spring compression must be performed according to regulations. Excessive or insufficient compression is not allowed. The required error is 2.00 mm. Excessive compression increases face specific pressure, accelerating face wear. Insufficient compression results in inadequate specific pressure, failing to achieve sealing. 3) After installing the rotating ring, pressing it against the spring should allow it to spring back automatically. 4) Installation position requirements: To ensure stable operation, long life, and low leakage of the mechanical seal, correct installation on the machine is crucial. Before installing the mechanical seal on the machine, carefully compare it with the general assembly drawing to confirm all parts are ready. Pay attention to any abnormalities such as scratches or damage on the sealing faces of the friction pair and sealing rings. Also check for scratches on the shaft or sleeve surfaces contacting packing and sealing rings (O rings), flanges, and other components. If abnormalities are found, replace or repair before use. During actual installation, do not bring unnecessary parts to the site. If parts remain after installation, it indicates missing components during installation; if parts are insufficient, it means unnecessary parts were assembled, serving as a self-check during installation.

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