Fishers Hill Mechanical Seal Handbook Pdf

DICHTOMATIK O-RING HANDBOOK All Seals Inc.

Product Range irp-cdn.multiscreensite.com

Mechanical seal handbook pdf

DMR TM Mechanical Seals Daemar Inc.. uninterrupted mechanical seal life is to create a healthy environment around the seal faces. Piping plans help keep mechanical seals running cool and clean, promote safe handling of dangerous fluids, and extend the operational availability of rotating equipment. This reference book provides a concise, • Mechanical seals are simply another means of controlling leakage of a process where other means are deemed to be less capable of performing the task adequately. For the purposes of this discussion, consider that a mechanical seal will out-perform common types of packing. • As mechanical seals can be used to seal a myriad of different.

Mechanical Seals John Crane

Mechanical Seals Fundamentals. Dry gas seals are basically mechanical face seals, consisting of a mating (rotating) ring and a primary (stationary) ring (Figure 2). During operation, grooves in the mating ring (Figure 3) generate a fluid-dynamic force causing the primary ring to separate from the mating ring, creating a “running gap” between the two rings., THE ABC’S OF MECHANICAL SEAL LEAKS AND IMPACT ON THERMAL FLUID OPERATIONS SAT D D O seal) S R S D Primary ring Mating ring O Gland plate (stationary) S (rotating) Typical single shaft seal THE NEED TO LEAK MECHANICAL SEALS MUST LEAK TO OPERATE PROPERLY; THEY ARE CONTROLLED LEAKAGE DEVICES, NOT ZERO LEAKAGE DEVICES. A leakage rate of 10 drops.

B02™ — Internal Bellows Mounted Mechanical Seal • Bellows with no bonded joints, available in Viton®, Nitrile or EPR • Single coil spring design with bi-directional shaft rotation feature • Available in 3 generic forms, covering shaft sizes 0.375” to 4.000” (10mm - 100mm) P0 series — Internal Single Coil Spring Mechanical Seal revenue. While every seal will fail eventually, taking proper care in selection of materials and geometries can help you get a higher level of performance and longer, more predictablelife out of your seals. The purpose of this handbook is to help you avoid costly surprises. We want to share with you what we at

Seals and Sealing Handbook, 6th Edition provides comprehensive coverage of sealing technology, bringing together information on all aspects of this area to enable you to make the right sealing choice. This includes detailed coverage on the seals applicable to static, rotary and reciprocating applications, the best materials to use in your John Crane is an American company, now a subsidiary of Smiths Group and provider of engineered products and services including mechanical seals, couplings, hydro-dynamic bearings, seal support systems, filtration systems and artificial lift.

Parker O-Ring Handbook 1.4 Operation All robust seals are characterized by the absence of any pathway by which fl uid or gas might escape. Detail differ- ences exist in the manner by which zero clearance is obtained — welding, brazing, soldering, ground fi ts or lapped fi nishes — or the yielding of a softer material wholly or partially confi ned between two harder and stiffer members Search the Handbook. The Kalsi Seals Handbook includes rotary seal implementation and troubleshooting guidelines, with a special emphasis on oilfield sealing applications. It represents the collective wisdom of our senior staff members, who have many decades of experience in solving seal implementation challenges. As such, it is an invaluable

18/04/2011 · Seals are ubiquitous, in industry, the home, transport and many other places. This 5th edition of a long-established title covers all types of seal by application: static, rotary, reciprocating etc. The book bears little resemblance to its predecessors, and Robert Flitney has re-planned and re-written every aspect of the subject. No engineer, designer or manufacturer of seals can afford to be Seals and Sealing Handbook, 6th Edition provides comprehensive coverage of sealing technology, bringing together information on all aspects of this area to enable you to make the right sealing choice. This includes detailed coverage on the seals applicable to static, rotary and reciprocating applications, the best materials to use in your sealing systems, and the legislature and regulations

Seals and Sealing Handbook, 6th Edition provides comprehensive coverage of sealing technology, bringing together information on all aspects of this area to enable you to make the right sealing choice. This includes detailed coverage on the seals applicable to static, rotary and reciprocating applications, the best materials to use in your TECHNICAL HANDBOOK Heavy Duty Slurry Pump HD Wilfley Sealing Technology No Flush Water Required. 1 WILFLEY SEALING TECHNOLOGY Wilfley Sealing Technology is the premier sealing solution for the toughest pumping applications and has proven to be a superior alternative to conventional sealing systems like mechanical seals and packing. It has been the foundation for every Wilfley pump design

revenue. While every seal will fail eventually, taking proper care in selection of materials and geometries can help you get a higher level of performance and longer, more predictablelife out of your seals. The purpose of this handbook is to help you avoid costly surprises. We want to share with you what we at Seals and Sealing Handbook, 6th Edition provides comprehensive coverage of sealing technology, bringing together information on all aspects of this area to enable you to make the right sealing choice. This includes detailed coverage on the seals applicable to static, rotary and reciprocating applications, the best materials to use in your

18/04/2011 · Seals are ubiquitous, in industry, the home, transport and many other places. This 5th edition of a long-established title covers all types of seal by application: static, rotary, reciprocating etc. The book bears little resemblance to its predecessors, and Robert Flitney has re-planned and re-written every aspect of the subject. No engineer, designer or manufacturer of seals can afford to be Mechanical seals are designed to overcome these drawbacks. 1.2 Design An essential mechanical seal contains three sealing points. 1. The stationary part of the seal is fitted to the pump housing with a static seal –this may be sealed with an o-ring or gasket clamped between the stationary portion and the pump housing. 2. The rotary portion of

fluid, mechanical seals play a key role in sealing process fluids in, keeping contaminants out, or both. A few basic components and principles in mechanical seal design contribute to a working seal at the interface of the rotating shaft and stationary pump/mixer/ seal-chamber housing. Mechanical seals are usually end-face seals or uninterrupted mechanical seal life is to create a healthy environment around the seal faces. Piping plans help keep mechanical seals running cool and clean, promote safe handling of dangerous fluids, and extend the operational availability of rotating equipment. This reference book provides a concise

Mechanical Seals Publications (FSA0010) Mechanical Seal Handbook, Revised Edition . This handbook provides a valuable reference and workbook for use by fluid power engineers, industrial maintenance personnel, students, libraries and engineering and trade associations. Kalsi Seal gland guidelines Chapter D5 Page 1 Contact Kalsi Engineering Search this handbook 1. Introduction and scope The “gland” is the enclosed space defined by …

Parker O-Ring Handbook 1.4 Operation All robust seals are characterized by the absence of any pathway by which fl uid or gas might escape. Detail differ- ences exist in the manner by which zero clearance is obtained — welding, brazing, soldering, ground fi ts or lapped fi nishes — or the yielding of a softer material wholly or partially confi ned between two harder and stiffer members w w w . k y s e a l s . c o m Spraying & granulating Dry powder pressing Alumina sintering Machining Rubber 3-dimensional meters Warehouse SiC & TC sintering CNC grinding Lapping

BULLETIN Number Twenty-Nine Selecting Mechanical Seals

Mechanical seal handbook pdf

Seals and Sealing Handbook 6th Edition. zigong Keyu Seal Science and Technology Co.,Ltd are largest Manufacturer and exporter of high pressure,high temperature,highspeed mechanical seal. Our product widely used in KSB pumps, Grundfos pumps,Flowserve pumps, etc. And our mechanical seal can totally replace original mechanical seal in sharpe agitator,ekato agitator, lightnin agitator,sardik agitator,mut agitator,mixpro agitator etc., Mechanical seal is basically a system that prevents leakages, in pump, specifically at motor & pump shaft joint… There are many different designs possible as per ….

Shaft Seal Handbook ESP International. SKF Seal Handbook Includes stock listing for shaft sizes up to 180” Featured products include: Speedi-Sleeve ® Shaft Repair Kits, Large Diameter Seals, Metric Seals, V-Ring products, Heavy-Duty DF ®, Hydraulic/Pneumatic, Scotseal ®, and PTFE Shaft Seals SKF Seal Handbook 4 5 7 0 1 0, w w w . k y s e a l s . c o m Spraying & granulating Dry powder pressing Alumina sintering Machining Rubber 3-dimensional meters Warehouse SiC & TC sintering CNC grinding Lapping.

www.flowserve.com

Mechanical seal handbook pdf

3. mechanical seals – fundamentals contents: i – introduction ii – mechanical seals iii - the basic mechanical seal iv - classification v – assembly options vi – aditional equipment and design vii – mechanical seal arrangements viii – barrier and buffer fluid selection ix – dynamic seals … Search the Handbook. The Kalsi Seals Handbook includes rotary seal implementation and troubleshooting guidelines, with a special emphasis on oilfield sealing applications. It represents the collective wisdom of our senior staff members, who have many decades of experience in solving seal implementation challenges. As such, it is an invaluable.

Mechanical seal handbook pdf

  • Mechanical Seal Piping Plans Flowserve
  • types of seals Request PDF ResearchGate

  • Shaft Seal Handbook. About ESP ESP offers a suite of products and services that are critical to global OEMs. ESP has developed in-house engineering that helps design OEM components such as seals, metal castings and forgings, and also provides value-added assembly, inventory management programs and supply chain logistics. After working with customers on design, ESP then uses its qualified Failure Analysis and Troubleshooting Mechanical Seals and Systems Michael Huebner Flowserve Corporation Texas A&M Pump Symposium Short Course ©2015 Flowserve Corporation. Mr. Huebner is a Principle Engineer at Flowserve Corporation in Deer Park, Texas. Mr. Huebner has been involved with the design and application of centrifugal pumps, mechanical seals, and fluid handling equipment for over …

    1st mechanical seals for pumps 1970 new building and organization 1986 1st Gaspac development 1923 1st centrifugal pipeline pump 1955 Seals 1987 BW/IP International, Inc. 1994 acquisition of BW Seals® 1901 New Era Manufacturing Co 1923 1930 1st Dura Seals for pumps 1995 Sept. Pac-Seal acquired 1995 Oct. Durco acquired 1997 1919 Pacific-Wietz founded 1950 Byron Jackson “BJ Seals” 1950 for a mechanical seal. But the consequences and effects may be more easily evaluated, and an increase of the seal‘s life time may be achieved in specifi c applications. Purposes and function If mechanical seals are used in pumps or other machines like mixers or dryers, often a barrier/ buffer system with a suitable medium is necessary to cool and/or lubricate the seal or to avoid deposits

    Mechanical Seal Configuration Codes for Torishima Mechanical Seals A number and a code indicate the configuration and materials used in each Torishima mechanical seal. The seals are classified as H, M or L according to load, with H and M indicating heavy load and L indicating light load. H and L types are typically single-spring seals, while This all-new CR Seals handbook from SF com-bines or best ideas and insihs from he ast and he resen We hoe i beomes yor first and las sorce for informaion on radial shaft seals The most obios hane in he handbook starts wih is ile The “CR Seals handbook” referenes CR – Chiao Rawhide – hroho to desribe he SF indstrial shaft seal offerin

    18/04/2011 · Seals are ubiquitous, in industry, the home, transport and many other places. This 5th edition of a long-established title covers all types of seal by application: static, rotary, reciprocating etc. The book bears little resemblance to its predecessors, and Robert Flitney has re-planned and re-written every aspect of the subject. No engineer, designer or manufacturer of seals can afford to be John Crane is an American company, now a subsidiary of Smiths Group and provider of engineered products and services including mechanical seals, couplings, hydro-dynamic bearings, seal support systems, filtration systems and artificial lift.

    x ë ~ } x { ñ-|z ë ë * z z ò ë ë ë . z| } ~x ò ë ë ì * z ó Seals and Sealing Handbook, 6th Edition provides comprehensive coverage of sealing technology, bringing together information on all aspects of this area to enable you to make the right sealing choice. This includes detailed coverage on the seals applicable to static, rotary and reciprocating applications, the best materials to use in your

    TECHNICAL HANDBOOK Heavy Duty Slurry Pump HD Wilfley Sealing Technology No Flush Water Required. 1 WILFLEY SEALING TECHNOLOGY Wilfley Sealing Technology is the premier sealing solution for the toughest pumping applications and has proven to be a superior alternative to conventional sealing systems like mechanical seals and packing. It has been the foundation for every Wilfley pump design Mechanical seal is basically a system that prevents leakages, in pump, specifically at motor & pump shaft joint… There are many different designs possible as per …

    US20140271141A1 Pump sealing system with throttle

    Mechanical seal handbook pdf

    types of seals Request PDF ResearchGate. mechanical seal and is defined as In practice k values are selected between 0.65 and 1.2. With a lower k value, the safety against thermal overload will increase, but the mechanical seal may also lift off more easily. Unlike an O-Ring seal, the hydraulic diameter of a bellows seal is not a fixed geometric value. It is also influenced by, seal and provides high sealability at low pressure. As system pressure increases, additional force is applied to the PolyPak’s seal interface and as pressure continues to increase, lip loading is automatically increased to compensate for this higher pressure and thus maintain a positive, leak-free seal from hard vacuum to over 60,000 psi with proper design and auxiliary devices. In addition.

    DICHTOMATIK O-RING HANDBOOK All Seals Inc.

    Failure Analysis and Troubleshooting Mechanical Seals and. zigong Keyu Seal Science and Technology Co.,Ltd are largest Manufacturer and exporter of high pressure,high temperature,highspeed mechanical seal. Our product widely used in KSB pumps, Grundfos pumps,Flowserve pumps, etc. And our mechanical seal can totally replace original mechanical seal in sharpe agitator,ekato agitator, lightnin agitator,sardik agitator,mut agitator,mixpro agitator etc., Mechanical Seal Configuration Codes for Torishima Mechanical Seals A number and a code indicate the configuration and materials used in each Torishima mechanical seal. The seals are classified as H, M or L according to load, with H and M indicating heavy load and L indicating light load. H and L types are typically single-spring seals, while.

    Mechanical seals are designed to overcome these drawbacks. 1.2 Design An essential mechanical seal contains three sealing points. 1. The stationary part of the seal is fitted to the pump housing with a static seal –this may be sealed with an o-ring or gasket clamped between the stationary portion and the pump housing. 2. The rotary portion of Mechanical Seal Failure Modes William H. Skewis Support Systems Technology Corp. Mechanical seals are used in industrial pumps, compressors, and other applications to provide a leakproof seal between component parts. There are many different designs of a mechanical seal to meet specific applications. A mechanical seal may be an assembly designed

    mechanical seals – fundamentals contents: i – introduction ii – mechanical seals iii - the basic mechanical seal iv - classification v – assembly options vi – aditional equipment and design vii – mechanical seal arrangements viii – barrier and buffer fluid selection ix – dynamic seals … TECHNICAL HANDBOOK Heavy Duty Slurry Pump HD Wilfley Sealing Technology No Flush Water Required. 1 WILFLEY SEALING TECHNOLOGY Wilfley Sealing Technology is the premier sealing solution for the toughest pumping applications and has proven to be a superior alternative to conventional sealing systems like mechanical seals and packing. It has been the foundation for every Wilfley pump design

    revenue. While every seal will fail eventually, taking proper care in selection of materials and geometries can help you get a higher level of performance and longer, more predictablelife out of your seals. The purpose of this handbook is to help you avoid costly surprises. We want to share with you what we at B02™ — Internal Bellows Mounted Mechanical Seal • Bellows with no bonded joints, available in Viton®, Nitrile or EPR • Single coil spring design with bi-directional shaft rotation feature • Available in 3 generic forms, covering shaft sizes 0.375” to 4.000” (10mm - 100mm) P0 series — Internal Single Coil Spring Mechanical Seal

    Seals and Sealing Handbook, 6th Edition provides comprehensive coverage of sealing technology, bringing together information on all aspects of this area to enable you to make the right sealing choice. This includes detailed coverage on the seals applicable to static, rotary and reciprocating applications, the best materials to use in your sealing systems, and the legislature and regulations Mechanical seals are designed to handle a range of motions and conditions, but they are just one machinery component in a larger system. Understanding the basics of mechanical seals and how they may be adapted for different application requirements is critical for choosing the best seal for the job and ensuring optimal system reliability.

    x ë ~ } x { ñ-|z ë ë * z z ò ë ë ë . z| } ~x ò ë ë ì * z ó BULLETIN Number Twenty-Nine Selecting Mechanical Seals What Is a Mechanical Seal? "What is a mechanical seal?" A definition is better given after the functions of a seal are described. A container holding a liquid or a gas has a rotatable shaft extending through its housing. This housing is shown in Fig. 1. Fluid is to be kept from escaping

    DICHTOMATIK O-RING HANDBOOK 132 ELASTOMER BASICS Before selecting an elastomer, it is important to have a basic understanding of what an elastomer is and what makes it unique as a class of materials. To understand elastomers, one has to first have a basic understanding of polymers. Polymers are long chains of repeating chemical units, or monomers. The chemical skeletal structures may be THE ABC’S OF MECHANICAL SEAL LEAKS AND IMPACT ON THERMAL FLUID OPERATIONS SAT D D O seal) S R S D Primary ring Mating ring O Gland plate (stationary) S (rotating) Typical single shaft seal THE NEED TO LEAK MECHANICAL SEALS MUST LEAK TO OPERATE PROPERLY; THEY ARE CONTROLLED LEAKAGE DEVICES, NOT ZERO LEAKAGE DEVICES. A leakage rate of 10 drops

    seal and provides high sealability at low pressure. As system pressure increases, additional force is applied to the PolyPak’s seal interface and as pressure continues to increase, lip loading is automatically increased to compensate for this higher pressure and thus maintain a positive, leak-free seal from hard vacuum to over 60,000 psi with proper design and auxiliary devices. In addition w w w . k y s e a l s . c o m Spraying & granulating Dry powder pressing Alumina sintering Machining Rubber 3-dimensional meters Warehouse SiC & TC sintering CNC grinding Lapping

    • Mechanical seals are simply another means of controlling leakage of a process where other means are deemed to be less capable of performing the task adequately. For the purposes of this discussion, consider that a mechanical seal will out-perform common types of packing. • As mechanical seals can be used to seal a myriad of different DICHTOMATIK O-RING HANDBOOK 132 ELASTOMER BASICS Before selecting an elastomer, it is important to have a basic understanding of what an elastomer is and what makes it unique as a class of materials. To understand elastomers, one has to first have a basic understanding of polymers. Polymers are long chains of repeating chemical units, or monomers. The chemical skeletal structures may be

    B02™ — Internal Bellows Mounted Mechanical Seal • Bellows with no bonded joints, available in Viton®, Nitrile or EPR • Single coil spring design with bi-directional shaft rotation feature • Available in 3 generic forms, covering shaft sizes 0.375” to 4.000” (10mm - 100mm) P0 series — Internal Single Coil Spring Mechanical Seal for a mechanical seal. But the consequences and effects may be more easily evaluated, and an increase of the seal‘s life time may be achieved in specifi c applications. Purposes and function If mechanical seals are used in pumps or other machines like mixers or dryers, often a barrier/ buffer system with a suitable medium is necessary to cool and/or lubricate the seal or to avoid deposits

    HANDBOOK TECHNICAL HD Fluid Technology

    Mechanical seal handbook pdf

    www.flowserve.com. for a mechanical seal. But the consequences and effects may be more easily evaluated, and an increase of the seal‘s life time may be achieved in specifi c applications. Purposes and function If mechanical seals are used in pumps or other machines like mixers or dryers, often a barrier/ buffer system with a suitable medium is necessary to cool and/or lubricate the seal or to avoid deposits, BULLETIN Number Twenty-Nine Selecting Mechanical Seals What Is a Mechanical Seal? "What is a mechanical seal?" A definition is better given after the functions of a seal are described. A container holding a liquid or a gas has a rotatable shaft extending through its housing. This housing is shown in Fig. 1. Fluid is to be kept from escaping.

    3. Mechanical seals are designed to handle a range of motions and conditions, but they are just one machinery component in a larger system. Understanding the basics of mechanical seals and how they may be adapted for different application requirements is critical for choosing the best seal for the job and ensuring optimal system reliability., Dry gas seals are basically mechanical face seals, consisting of a mating (rotating) ring and a primary (stationary) ring (Figure 2). During operation, grooves in the mating ring (Figure 3) generate a fluid-dynamic force causing the primary ring to separate from the mating ring, creating a “running gap” between the two rings..

    Seals and Sealing Handbook ScienceDirect

    Mechanical seal handbook pdf

    Mechanical Seal Piping Plans A.R. Thomson. for a mechanical seal. But the consequences and effects may be more easily evaluated, and an increase of the seal‘s life time may be achieved in specifi c applications. Purposes and function If mechanical seals are used in pumps or other machines like mixers or dryers, often a barrier/ buffer system with a suitable medium is necessary to cool and/or lubricate the seal or to avoid deposits zigong Keyu Seal Science and Technology Co.,Ltd are largest Manufacturer and exporter of high pressure,high temperature,highspeed mechanical seal. Our product widely used in KSB pumps, Grundfos pumps,Flowserve pumps, etc. And our mechanical seal can totally replace original mechanical seal in sharpe agitator,ekato agitator, lightnin agitator,sardik agitator,mut agitator,mixpro agitator etc..

    Mechanical seal handbook pdf

  • machining.grundfos.com
  • US20140271141A1 Pump sealing system with throttle
  • Kalsi Seal gland guidelines (Kalsi Seals Handbook Chapter D5)

  • MATERIAL SELECTION FOR MECHANICAL SEALS by Michael Huebner Staff Engineer Flowserve Corporation Flow Solutions Division Deer Park, Texas. bellows must be easily welded, have good physical properties, and be resistant to most types of corrosion. Seal Faces The seal faces of a mechanical seal provide a demanding set of requirements for a seal designer. The faces must be stable, conduct heat, … MATERIAL SELECTION FOR MECHANICAL SEALS by Michael Huebner Staff Engineer Flowserve Corporation Flow Solutions Division Deer Park, Texas. bellows must be easily welded, have good physical properties, and be resistant to most types of corrosion. Seal Faces The seal faces of a mechanical seal provide a demanding set of requirements for a seal designer. The faces must be stable, conduct heat, …

    Dry gas seals are basically mechanical face seals, consisting of a mating (rotating) ring and a primary (stationary) ring (Figure 2). During operation, grooves in the mating ring (Figure 3) generate a fluid-dynamic force causing the primary ring to separate from the mating ring, creating a “running gap” between the two rings. Failure Analysis and Troubleshooting Mechanical Seals and Systems Michael Huebner Flowserve Corporation Texas A&M Pump Symposium Short Course ©2015 Flowserve Corporation. Mr. Huebner is a Principle Engineer at Flowserve Corporation in Deer Park, Texas. Mr. Huebner has been involved with the design and application of centrifugal pumps, mechanical seals, and fluid handling equipment for over …

    x ë ~ } x { ñ-|z ë ë * z z ò ë ë ë . z| } ~x ò ë ë ì * z ó uninterrupted mechanical seal life is to create a healthy environment around the seal faces. Piping plans help keep mechanical seals running cool and clean, promote safe handling of dangerous fluids, and extend the operational availability of rotating equipment. This reference book provides a concise

    Search the Handbook. The Kalsi Seals Handbook includes rotary seal implementation and troubleshooting guidelines, with a special emphasis on oilfield sealing applications. It represents the collective wisdom of our senior staff members, who have many decades of experience in solving seal implementation challenges. As such, it is an invaluable TM Mechanical Seals Selecting a replacement Mechanical Seal 861 Cranberry Court Oakville, ON L6L 6J7 Phone: (905) 847-6500 Fax: (905) 847-6943 email: sales@daemarinc.com www.daemar.com The best way to interchange a mechanical seal is by using the OEM part number and the “Pump Manufacturers Cross- Reference” included with this tutorial. Of

    Mechanical seal is basically a system that prevents leakages, in pump, specifically at motor & pump shaft joint… There are many different designs possible as per … 1st mechanical seals for pumps 1970 new building and organization 1986 1st Gaspac development 1923 1st centrifugal pipeline pump 1955 Seals 1987 BW/IP International, Inc. 1994 acquisition of BW Seals® 1901 New Era Manufacturing Co 1923 1930 1st Dura Seals for pumps 1995 Sept. Pac-Seal acquired 1995 Oct. Durco acquired 1997 1919 Pacific-Wietz founded 1950 Byron Jackson “BJ Seals” 1950

    Dry gas seals are basically mechanical face seals, consisting of a mating (rotating) ring and a primary (stationary) ring (Figure 2). During operation, grooves in the mating ring (Figure 3) generate a fluid-dynamic force causing the primary ring to separate from the mating ring, creating a “running gap” between the two rings. A sealing arrangement is disclosed for a rotating shaft. A mechanical seal and a throttle bushing are mounted in a pump casing having a process fluid chamber and an end region. A shaft is rotatably mounted in the pump casing. The seal has a stationary portion mounted to the pump casing, and a rotatable portion mounted to the shaft. A throttle bushing surrounds the shaft and is connected to the

    View all posts in Fishers Hill category