German chesterton seals chesterton models chesterton prices

chesterton 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 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 these advantages. Cartridge seals are also a type of cartridge mechanical seal. In this design, 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. 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.

chesterton seal advantages

1) Oil seals have a simple structure and are easy to manufacture. Simple oil seals can be molded in a single step; even the most complex oil seals do not require complicated manufacturing processes. Metal-cased oil seals only require stamping, bonding, insertion, and molding processes to combine metal and rubber into the required oil seal. 2) Oil seals are lightweight and consume little material. Each oil seal is a combination of thin-walled metal and rubber components, resulting in minimal material usage and very light weight per seal. 3) Oil seals require small installation spaces 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 provide a certain degree of adaptability to machine vibration and main shaft eccentricity. 5) Oil seals are easy to disassemble and convenient to inspect. 6) Oil seals are inexpensive.

chesterton seal precautions

1) Preparation and precautions before startup: a. Comprehensively inspect the mechanical seal, as well as auxiliary devices and piping, to ensure they are complete and comply with technical requirements. b. Perform a static pressure test on the mechanical seal before startup to check for leakage. If there is significant leakage, identify the cause and take measures to eliminate it. If this is ineffective, disassemble, inspect, and reinstall. The static test pressure is generally 2~3 kg/cm². c. Rotate the pump by hand in the direction of rotation to check if it moves lightly and evenly. If rotation is difficult or stuck, check whether assembly dimensions are incorrect or installation is unreasonable. 2) Installation and shutdown: a. Keep the seal chamber filled with liquid before startup. When conveying 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 fracture of the soft ring. b. For mechanical seals using an external seal oil system, start the seal oil system first. Stop the seal oil system last after shutdown. c. After stopping a hot oil pump, do not immediately stop the cooling water for the seal oil chamber and face seal. 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 the leakage, stop the pump for inspection. b. Pump operating pressure should be stable, with pressure fluctuations not exceeding 1 kg/cm². c. During pump operation, avoid cavitation to prevent dry friction and seal damage. d. Regularly inspect the sealing condition. During operation, if leakage exceeds the standard (no more than 5 drops/min for heavy oil, no more than 10/min for light oil), and there is no improvement within 2-3 days, stop the pump to inspect the sealing device.

chesterton seal specifications and applications

1) Standard single-lip: Generally used for sealing mineral oil, water, and other media on high- and low-speed rotating shafts and reciprocating motions. Standard oil seals are used in environments with little dust and impurities, resistant to media pressure<0.05MPa, maximum linear speed 15m/s, reciprocating speed<0.1m/s. 2) Standard double-lip: In addition to the usage characteristics of the aforementioned S type oil seals, they also provide dust protection. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure<0.05MPa, linear speed ≤15m/s. 3) Springless type: Springless single-lip inner-cased skeleton rubber oil seal. Generally suitable for low-speed conditions where the sealing medium is lubricating grease. Linear speed ≤6m/s. 4) Outer-skeleton single-lip: Single-lip exposed-skeleton rubber oil seal with spring. It has a thin waist, good follow-up capability, and good rigidity. Standard oil seals are used in environments with little dust and impurities, resistant to media pressure<0.05MPa. Rotational axis linear speed ≤15m/s. 5) Outer-skeleton double-lip: Double-lip exposed-skeleton rubber oil seal with auxiliary lip. It has a thin waist, good follow-up capability, high rigidity, and good concentricity. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure<0.05MPa. Rotational speed ≤15m/s. 6) Assembled single-lip: Outer-skeleton oil seal formed by assembling inner and outer skeletons with rolled edges. It features high installation precision, fast heat dissipation, and heavy-load characteristics. Suitable for heavy-load conditions under high temperature and high speed. Media pressure ≤0.05MPa, maximum linear speed ≤15m/s. 7) Unidirectional return flow type (right-hand, left-hand): Angled ribs are manufactured on the air side of the lip. Using fluid dynamics principles, it generates a unidirectional pumping action with a return flow effect. Related to the shaft's direction of rotation, the return flow effect results in lower radial force compared to standard oil seals, reducing wear and heat generation, and extending service life. Suitable for media pressure<0.05MPa, rotational speed ≤20m/s. 8) Pressure-resistant type: Short lip and short, thick waist provide pressure resistance. Working pressure ≤3MPa. Suitable for applications with media pressure ≤3MPa, used as shaft end oil seals for high-pressure pumps. Under normal conditions, PV value ≤8. Rotational axis linear speed ≤15m/s.

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