Germany Montabert seals Montabert model Montabert price

Montabert seals are materials or components that prevent leakage of fluids or solid particles from adjacent mating surfaces and prevent external contaminants such as dust and moisture from entering machinery. The recommended storage temperature for seals is below 30 °C to avoid high-temperature aging. Seals are classified into static seals and dynamic seals. Their main function is to prevent leakage of fluids or solid particles from adjacent mating surfaces and to prevent external contaminants such as dust and moisture from entering machinery. Static sealing refers to the tight closure of sealed chambers, sealed containers, seals for letters, and stamps for wills.

Montabert seals introduction

Mechanical seals are shaft sealing devices for rotating machinery, such as centrifugal pumps, centrifuges, reaction vessels, and compressors. Since the drive shaft passes through the interior and exterior of the equipment, there is a circumferential gap between the shaft and the equipment. Media inside the equipment can leak outward through this gap. If the internal pressure is lower than atmospheric pressure, air can leak into the equipment. Therefore, a shaft sealing device is required to prevent leakage. There are many types of shaft seals. Due to advantages such as low leakage and long service life, mechanical seals are the primary shaft sealing method for these equipment worldwide. Mechanical seals are also called face seals. National standards define them as: "A device that prevents fluid leakage by maintaining contact and relative sliding between at least one pair of faces perpendicular to the rotation axis, under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism, in conjunction with auxiliary seals."

Montabert seals structure composition

1) Main components: rotating ring, stationary ring, cooling device, and compression spring (depending on specific equipment). 2) Auxiliary seals: O-rings (O-shaped, X-shaped, U-type, wedge-shaped, rectangular flexible graphite, PTFE-covered rubber O rings, etc.). 3) Elastic compensation mechanism: springs, thrust rings, spring seats, keys, and various screws. 4) Classification: single-face, double-face; balanced, unbalanced; arbitrary rotation direction, fixed rotation direction.

Montabert seals maintenance

1) Control of shaft seal pressure: High shaft seal pressure can cause steam leakage from the shaft seal, leading to water ingress into the oil and deterioration of turbine oil quality. Excessively high shaft seal pressure will trigger the safety valve of the equalizing tank, wasting working media and damaging equipment. Low shaft seal pressure may cause a drop in unit vacuum, allowing cold air to enter the shaft seal or even the cylinder, causing cooling of the shaft seal section or inside the cylinder, which seriously threatens equipment safety. 2) Impact of abnormal shaft seal temperature on the unit: When the shaft seal temperature is too high, especially before unit startup, excessive heat causes intense heating at the shaft end gland and rotor gland section, leading to local stress concentration and deformation. This may change the clearance between the rotor and cylinder, increase shaft seal steam leakage, increase differential expansion, and potentially cause rubbing between rotating and stationary parts. When the shaft seal temperature is too low, the shaft end gland and rotor gland section are cooled, also causing local stress concentration, changing the clearance between the cylinder and rotor, increasing shaft end steam leakage, and decreasing differential expansion. Low shaft seal temperature may also cause water carryover in the shaft seal supply steam, leading to water hammer in the supply pipeline. In severe cases, this can cause water ingress into the turbine.

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