Mechanical Seals

Powerflo Products Inc. is a proud and authorized Chesterton Mechanical Seal Distributor. Chesterton’s award-winning mechanical seals for pumps, agitators, mixers, and other rotating equipment simplify installation, improve reliability, and extend the performance of fluid handling.

For innovative, high value mechanical seal design​ and pump packing solutions, turn to Chesterton’s in-depth expertise and strong history of client collaboration. Working with your own staff, the Chesterton engineering team develops tailored, highly-reliable solutions for demanding applications and mission-critical equipment.

Please Contact Us today for a quote on a Chesterton mechanical seal solution!

  • Chesterton 1510 General Duty Single Cartridge Seal

    Simple Installation and Increased Reliability Plant-wide in General Duty Applications


    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Maximize maintenance efficiency and increase plant productivity with the 1510 Single Cartridge Seal. Designed to fit process equipment plant-wide by incorporating Chesterton T.A.B.S. (Tapered Adjustable Bolting System) the compact profile makes seal installation easy.


    Reliability through temperature variations and intermittent operations is ensured with the use of monolithic seal faces and true non-fretting construction. Impeller adjustments after seal fitment are accommodated with the unique resettable centering strap, even when adjustment is required between routine maintenance. Incorporating Chesterton’s 5 key features of good mechanical seal design, the Chesterton 1510 sets the new standard for general duty cartridge seals.



    • ​Reliable through temperature cycling and intermittent process with monolithic seal faces
    • In service impeller adjustment is possible with the unique centering strap
    • Mounts easily on various types of rotating equipment using Chesterton T.A.B.S.
    • Prevents damage to your equipment and internal components via true non-fretting design
  • Chesterton 155 & 255 Standard Cartridge Single Seal

    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The Chesterton 155 cartridge-style single seal is the perfect seal for all of your general-purpose plant applications. This simple mechanical seal design results in a more robust and reliable seal for general applications, while the low profile seal faces allow for low heat generation—making it ideally ​suited for non-lubricating fluids.

    With the addition of the adjustable gland tabs, the Chesterton 155 can adapt to any bolting pattern, making installation easier.



    • Adjustable/removable gland tabs
    • 360-degree flush port rotation
    • Quick-release centering straps
    • Available in special alloys
    • Dynamically stress-relieved narrow profile faces


    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The Chesterton 255 cartridge-style double seal provides a cost-effective solution for a wide variety of applications that require dual sealing with the flexibility to meet some of the most challenging conditions.

    Thanks to its integrated pumping ring and universal gland with both flush port as well as quench and drain, the 255 can handle the most demanding applications. Whether you need advanced environmental controls or system pressure fluctuation tolerance, the 255 has you covered.



    • Geometric double balance eliminates shifting O-Rings
    • High-flow pumping device
    • Features from brochure
    • Self-Centering Lock Ring™ ​​eliminates misalignment
  • Chesterton 170 Slurry Single Cartridge Seal

    Engineered for harsh, heavy consistency slurry environments, this seal’s unique, no-clog design reduces or eliminates costly external seal flushes. The Chesterton 170 improves plant efficiencies by reducing product dilution and increasing production rates.

    170 ISO is an off-the-shelf product that fits directly to ISO-3069-H and ISO-3069-C seal chambers.​



    • Runs longer in heavy abrasive slurries without the need for flush or quench water
    • Non-clog pressure plate design
    • Springs located entirely outside the seal
    • Simple, robust design​
    • Micro-polished seal faces
    • Optimal balance for slurry service
    • Easy to maintain
  • Chesterton 170L Slurry Cartridge Single Seal

    ​​​​​​​​​​​​​​​​​​​​​​​E​ngineered to operate in harsh, heavy consistency slurry environments and eliminate costly external seal flushes in the majority of applications.


    Chesterton 170L is designed for sealing mineral-based process materials such as ores, limestone, coal, sugar, and phosphates. The innovative, non-clog seal uses a unique coil spring design in which the springs are located entirely outside the seal.  It is engineered to fit Warman® AH® series pumps​​ without modification.


    The 170L uses a single clamping screw which simplifies seal removal in sticky or viscous fluids or where solids clog up the set screws. This seal has large clearance and rugged components designed to resist the effects of heavy slurry environments.



    Runs longer in heavy abrasive slurries without the need for flush or quench water

    -Non-clog pressure plate design
    -Innovative pressure plate design
    -Springs located entirely outside the sea


    Reliable design that addresses real life slurry pumping conditions
    -Micropolished O-Ring surfaces eliminate O-Ring hang-up
    -Optimal balance for slurries
    -Line-to-line slurry faces
    -Stationary springs
    -High strength drives


    Easy to maintain
    -Single clamping screw simplifies seal installation and removal
    -Integrated centering tabs
    -Washable in-service
    -In-field repairable
    -No quench and drain needed

  • Chesterton 180 & 280 Heavy-Duty Cartridge Seal

    Chesterton 180 Heavy-Duty Cartridge Single Seal
    Greater Sealing Reliability for a Wide Range of Applications

    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​A heavy-duty single cartridge seal specifically designed for maximum reliability in demanding applications. The full-featured gland provides quench and drain capability. Designed to fit ANSI pumps with no modifications for ease of use.​

    • Maximum performance for demanding, high-torque applications
    • Reliable sealing of slurries​
    • Certified to NSF/ANSI 61


    Chesterton 280 Cartridge Double Mechanical Seal
    Heavy Duty Capabilities for Difficult Applications

    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​This double mechanical seal allows for a new, higher level of reliability and performance with the convenience of a cartridge seal.  The Chesterton 280™ Double Mechanical Seal is specifically designed to handle demanding, high-torque applications.


    This product is an ideal selection for such difficult applications as high concentration black liquor, hard-to-seal monomers such as acrylonitrile, vinyl chloride monomer, and any other potentially viscous solidifying liquids.


    • High-reliability sealing​
    • Maximum solids handling capability
    • Superior performance for demanding applications
    • Motion tolerant for mixer applications

    Brochure: Chesterton 280 Heavy Duty Cartridge Seal

    Brochure: Chesterton 180 Heavy Duty Cartridge Seal

  • Chesterton 180H Single Cartridge Seal

    An exceptional high temperature seal, the Chesterton180H Single Cartridge Seal uses an advanced hydropad geometry seal face that improves film formation between the mechanical seal faces and significantly enhances face lubricity. The increased film formation between the faces reduces heat generation and increases seal life in many high temperature applications.


    Hydropad designs are useful in high-pressure applications—​where pressure has a tendency to distort the seal faces and where the face velocity increases heat generation and in sealing fluids that have poor lubrication properties. Hot water applications are a prime area where hydropad technology can be utilized to improve sealing reliability. The 180H seals water at high temperature without environmental controls to temperatures up to 260°C (500°F).​



    • A high temperature seal also designed for high speed and pressure
    • External cooling requirements are not needed for most applications, eliminating support equipment
    • Advanced hydropad geometry minimizes seal facewear and distortion
    • Reduces the frictional seal face heat concerns common with standard contacting seal face designs
    • Hydropad geometry increases pressure velocity parameters over standard seal face designs
    • Compact cartridge design for easy and reliable installation
    • Use where external cooling is intermittent, limited, or unavailable
  • Chesterton 1810 & 2810 Heavy-Duty Modular Cartridge Seals

    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​1810 Heavy-Duty Modular Single Cartridge Seal

    This Chesterton® single cartridge seal offers you the ultimate in seal quality, flexibility, and emissions control.


    Leveraging Chesterton’s proprietary AXIUS modular platform, the 1810 can be configured with several different face profiles and auxiliary components within a common gland housing. This flexibility allows seal performance to be tailored to a wide range of process conditions.


    A plant-wide sealing solution, the 2810 uses a geometric double​-balanced seal face design. An optimized barrier/buffer channel for enhanced fluid flow provides greater seal reliability even at elevated temperatures.



    2810 Heavy-Duty Modular Double Cartridge Seal

    This Chesterton® double cartridge seal offers you the ultimate in seal quality, flexibility, and emissions control.


    Leveraging Chesterton’s proprietary AXIUS modular platform, the 2810 can be configured with several different face profiles and auxiliary components within a common gland housing. This flexibility allows seal performance to be tailored to a wide range of process conditions.


    A plant-wide sealing solution, the 2810 uses a geometric double​-balanced seal face design. An optimized barrier/buffer channel for enhanced fluid flow provides greater seal reliability even at elevated temperatures.


    Brochure: Chesterton 1810/2810 Modular Cartridge Seals

  • Chesterton 442 Split Seal

    High-Performance Seals Available in Large Diameters

    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The Chesterton 442 split seal is ideal for equipment that is difficult and time-consuming to disassemble, such as large pumps, vertical pumps, and horizontal split case pumps. This ​proven, compact design can be used in a wide variety of equipment and process fluids.​

    The patented, high-performance split technology allows the 442 to operate from vacuum to high pressures.

    • ​Compact design allows for easy installation and a fit advantage on most equipment
    • Split, low-cost repair kits reduce ongoing maintenance costs even further
    • Designed with the installer in mind, the ball-and-socket O-Rings provide a quick and easy leak-free seal without the use of adhesives
    • Captive screws cannot fall out, making installation straightforward and reliable

    1NSF version available upon request.


    • Fully split mechanical seal
    • Ball-and-socket O-Rings
    • Adjustable gland tabs
    • Patented, automatic centering
    • Patented, full-vacuum capability
    • Engineered for high pressure
    • Non-clog external springs
    • Non-fretting to equipment
    • Dry run capable
    • Large seal diameter options
    • Integral dual flushport​
    • Certified to NSF/ANSI 61​
  • Chesterton 442C 1.750″ Split Seal for ANSI Pumps

    Powerflo Products Inc. stocks a wide array of high performance cartridge seals and split mechanical seals from the AW Chesterton Co. Particularly we stock these exceptional seals to fit ANSI pumps from small to large frames, such as this 442C Split Cartridge seal to fit the following standard bore fitted pump models: Summit 2196MTO, Goulds 3196MTX and 3196MTi, Peerless 8196MTP, Griswold 811M, Titan 4196, and Pinnacle 8896.


    Replace your pump’s seal without removing it from service with the Chesterton 442C split cartridge seal!


    Seals are in stock and our specialists are standing by to assist you with the right seal for your application.


  • Chesterton 442C Split Cartridge Seal

    Chesterton is the world leader in design innovation of split seals. Our innovative split seals have been used to seal thousands of process-critical pieces of rotating equipment with exceptional​​ ​results and many years of leak-free operations.


    Chesterton was the first company to offer commercially-viable split seals for plant-wide use, which revolutionized pump sealing across industries. Since that time, we’ve launched a number of innovative split seal designs now used as a standard by companies around the globe.​ We offer shaft diameters ranging from 25-914​ mm (1-36 in.)​


    Common sizes currently in stock at Powerflo Products Inc.


    Powerflo is an authorized Chesterton Mechanical Seal Distributor in California.


  • Chesterton 442C XL Cartridge Split Mechanical Seal

    Equipment disassembly leads to high maintenance and operating costs as well as safety risks, but with extremely large pumps and other rotating equipment the stakes are even higher. The Chesterton 442C XL Split Seal, which suits equipment shafts from 5.00″ (125 mm) upto 7.75″ (195 mm), allows for seal installation without disassembly of large pumps, helping customers avoid extended downtime, lifting of heavy components, and disruption to nearby equipment.


    The XL also has the following features that simplify reliable installation and operation:

    • Spring Carrier Plate​: Reduces installation errors and saves time
    • Unique O-Ring Grooves​: Greater sealing capability for use in more applications
    • Automatic Self-Aligning Faces​:  Aligned and compressed automatically without manual handling​
    • Interlocking Rotary Face​: Positively locates the face halves for greater sealing reliability


    • Simple cartridge installation—without equip​ment disassembly
    • Innovative design with superior performance
    • Fits the majority of rotating equipment
    • Easy field repair
    • Certified to NSF/ANSI 61​
  • Chesterton 442M Mixer Split Seal

    Split Seal that Accommodates Radial and Axial Shaft Motion for Industrial Mixers & Agitators


    ​​​​​​​​The Chesterton 442M split mechanical seal eliminates the need for equipment disassembly during seal installation and reduces maintenance costs. This split technology includes vacuum-to-positive pressure capability, which is especially beneficial in process vessel material transfer. It accommodates large radial and axial shaft motion associated with industrial mixers, agitators, reactors, and blenders.


    • ​Installation is made easy with patented, automatic centering
    • 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 are leak-free without the use of adhesives
    • Available in sizes ranging from 20 mm to 610 mm (.75″ in.-24 in.)



    • Ball-and-socket O-rings
    • Patented, automatic centering
    • Patented, captive fasteners that will not fall out
    • Large axial and radial motion handling capability
    • Full vacuum and high pressure sealings
    • Non-clog external springs
    • Non-fretting to equipment
    • Dry run capable
    • Compact design
    • Integral dual flushport