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Mechanical Seal

442PRSplit Pumping Ring Seal

Eliminates the need for equipment disassembly during seal replacement
The 442 split design significantly reduces down-time and overall maintenance costs. This seal is ideal for hot heater drain and boiler feed equipment where cooling to a single seal must be provided.
The high capacity pumping ring provides for maximum heat removal and reliability in hot water services. Coolest running seal faces include premium high graphite seal face material combined with a silicon carbide primary face. The 442PR delivers the lowest cost of ownership from its ease of installation, low cooling, cost, and reliability.

442MSplit Mixer Seal

Eliminates the need for equipment disassembly during seal installation and reduces maintenance costs
The 442 split technology includes vacuum-to-positive pressure capability,which is especially beneficial in process vessel material mixing.
It accommodates large radial and axial shaft motion associated with mixers, agitators, reactors, and blenders. Installation is made easy with patented automatic centering. The 442M uses many patented features,allowing for easy and cost-effective field repair. The unique ball-and-socket O-rings are the easiest to install and leak free without the use of adhesives.Captive screws cannot fall out, making installation straightforward and reliable.

886HTRotary Bellows Seal

High temperature design for the replacement of non-cartridge, low technology direct shaft mounted seals
The 886HT standard AM 350 bellows core is well suited for mild corrosives and higher temperature environments.
Graphite secondary seals take the place of O-rings for high temperature services related to petrochemical and chemical plant processes. The 886HT is designed to avoid fretting damage to the equipment shaft/sleeve.

886Rotary Bellows Seal

Designed for the replacement of non-cartridge,low technology direct shaft mounted seals
The 886 standard corrosion-resistant Hastelloy® C bellows core is ideal for sealing a wide range of chemical services.
This bellows core design has more convolutions, providing optimized spring rates. The rugged welded metal bellows design with static O-rings will provide an upgrade, eliminating O-ring concerns. The 886 is designed not to result in fretting damage to the equipment shaft/sleeve.

286HTBellows Cartridge Dual Seal

Meets the most stringent high temperature requirements for sealing emissions, toxic and other hazardous fluids
The 286HT is a proven performer used primarily in the chemical and petrochemical industries. The 286HT is built with AM 350 bellows material as standard, and 718 Inconel® as optional.
Graphite secondary seals take the place of O-rings for high temperature services related to petrochemical and chemical plant processes. The high strength, low spring rate bellows core delivers low heat generation and reliable sealing performance. The self-cleaning rotary bellows design will reduce the clogging associated with sealing fluids and solids in suspension. The tandem bellows arrangement provides maximum pressure capability and safety performance.

186HTBellows Cartridge Single Seal

Designed for high temperature services related to petrochemical and chemical plant processes
This high temperature version of the 186 seal is built with AM 350 bellows material as standard, and 718 Inconel® offered as optional.
Graphite secondary seals take the place of O-rings for high temperature services. The high strength, low spring rate bellows core delivers low heat generation and reliable sealing performance. A self-cleaning rotary bellows design will reduce the clogging ssociated with sealing fluids and solids in suspension.

286 Bellows Cartridge Dual Seal

Meets the most stringent sealing requirements for sealing emissions and toxic and other hazardous fluids
The 286 seal is a proven performer that is used primarily in the chemical and petrochemical industries.
The high strength, low spring rate bellows core delivers low heat generation and reliable sealing performance. The self-cleaning rotary bellows design eliminates the clogging associated with sealing fluids and solids in suspension. The tandem bellows arrangement provides maximum pressure capability and safety performance.

186 Bellows Cartridge Single Seal

Suited for harsh chemical services that can cause difficulty with other seals
The 186 welded metal rotary bellows can enhance reliability in some applications by minimizing O-ring concerns. This seal is used primarily in the chemical and petrochemical industries.
The high strength, low spring rate bellows core delivers low heat generation and reliable sealing performance. The self-cleaning rotary bellows design will reduce the clogging associated with sealing fluids and solids in suspension.

S20 High Performance Dual Seal

Unique modular cassette that combines advanced seal technology with flexibility in maintenance and repair
In the Streamline series of seals, all the wearing parts are contained in a single, replaceable cassette unit. Single and dual cassettes share a common universal gland. Repair is a matter of exchanging cassettes, making it fast and easy, while significantly reducing cost associated with repair.
The S20 Streamline seal incorporates Chesterton advanced seal technology into the cassette feature. The in-series oriented seal face arrangement with independently mounted springs delivers a higher pressure tandem design. Geometric balance with low heat generation is achieved with the innovative piston design. The two-step installation is made possible with an automatic centering feature. The S20 utilizes a high-flow pumping device, which assists in efficient heat removal.

S10 High Performance Single Seal

Unique modular cassette that combines advanced seal technology with flexibility in maintenance and repair
In the Streamline series of seals, all the wearing parts are contained in a single, replaceable cassette unit. Single and dual cassettes share a common universal gland. Repair becomes a matter of exchanging cassettes, making it faster and easier, while significantly reducing cost associated with repair.
The S10 Streamline seal incorporates Chesterton advanced seal technology into the cassette feature. The extremely stable seal faces are cooled effectively with an advanced multi-port design, while the full-featured gland design incorporates a quench/drain option and floating bushing. The two-step installation is made possible with automatic centering.

150 General Purpose Single Seal

This seal is a value leader in its class
The 150 is designed for baseline applications and for upgrading packed or component-sealed equipment. The cartridge design minimizes installation error, delivering higher reliability and improved housekeeping.When packed equipment can’t deliver the life cycle expected in a sealing solution, the 150 mechanical seal will increase reliability and address housekeeping concerns associated with packing. When component seals are used, the 150 cartridge design will improve the seal replacement process by making it easier and faster while eliminating installation error that is commonly associated with component seals.

250 General Purpose Dual Seal

This dual seal is a value leader in its class
The 250 is designed for cost-effective upgrading from packing and underperforming single seals—further increasing plant reliability. The 250 is an ideal choice for baseline applications where the need for special alloys doesn’t exist.
The off-set gland design is very efficient in barrier fluid exchange whencompared to most other cartridge seals in its class. This design has improved heat removal. Seal face geometrics are optimized to ensure reliable sealing under varying temperature and pressure changes.

280™ Heavy Duty Dual Seal

A dual seal design for severe duty and greatest reliability in difficult applications
The 280 is ideal for sealing viscous fluids and tough slurry applications such as paint, coatings, and black liquor—as well as heavy slurries in mineral/ore processing and raw material manufacturing.The 280 incorporates all the latest design advancements in mechanical sealing technology. Its geometric double-balanced design makes it the ideal choice for plant-wide standardization because it accepts process pressure reversals. Unified Seal Face Alignment™ provides extended axial play capabilities and accommodates thermal expansion in equipment with long shafts. An efficient integral pumping device with tangential internal cut-waters allows for efficient heat removal.

442™ Split Mechanical Seal

High Performance Split Mechanical Seal 
The CHESTERTON® 442 Split Mechanical Seal construction enables the seal to handle pressures three and one-half times higher than conventional split seals. In addition, the 442 is the only split seal specifically designed to be able to withstand vacuum in the stuffing box. This makes it the ideal seal for main and auxiliary condensate pumps.

180™ Heavy Duty Single Seal

High Reliability Cartridge Single Seal

The CHESTERTON®180 High Reliability Single Seal provides a complete and integrated package of technical features to ensure high reliability in demanding marine/shipboard services.Heavy duty, robust design makes the 180 the seal of choice for a wide range of marine and shipboard applications.

155™ Standard Single Seal

High Performance Single Mechanical Seal
The CHESTERTON® 155 Cartridge Single Mechanical Seal is a versatile and cost effective sealing device for marine/shipboard applications. Advanced face design resists distorting effects of pressure and temperature to maintain flatness in hot water and fuel oil applications. The completely adjustable gland allows this ingenious design to fit a wide range of equipment bolt circles and bolt sizes without modification.

M7N*

M7N* 
Unbalanced single seal * wave springs* Independent on direction of rotation * to DIN 249560*

M32*

M32* 
Unbalanced Single seal * Conical spring* Dependent on direction of rotation * to DIN 24690*

MG1*
MG1* 
Unbalanced single spring * Independent on direction of rotation * Elastomer belllow * to DIN 24250*

 

PAC 21*

PAC 21*
Unbalanced single spring seal * Independent on direction of rotation * elastomer bellow *