Product Support 030605 - Steam Forum

1 HopkinsonsINDEX2 Weir Valves & ControlsFirst choice for process protectionWVC-HOP001-R0 Weir Valves & Controls4 The Hopkinson Story6 - 17 Company Milestones18 Boiler Mountings & Valves18 Parallel Slide Gate Valves(a) Operating & Design Features19 - 20(b) Product Application20(c) Hopkinsons Product Range & Features20(d) Valve Construction20(i) Back Seating(ii) Packing Under Pressure(iii) Seats & Discs(e) Comparison of Parallel Slide Valve with Wedge Gate22 - 25(i) Seating Principles(ii) Thermal Binding(iii) Ease of Maintenance(f) Optional End Connections26(g) Bolted Bonnets26(h) Stuffing Box Design26 - 28(i) Exfoliated Graphite Packing(ii) Upgrading of Conventional Glands & Pressure Seal Bonnets(iii) Water Sealed Glands(i) High pressure Parallel Slide Gate Valves28 - 33(i) Pressure Seal Bonnets(ii) Venturi Bore Design(iii) Follower Eye(iv) Seat Velocities(v) Product Ratings(vi) Relationship Between Nom.

2 Pipe Size & Valve Seat Diameter (vii) Vee Port Outlet Seats(viii) Steam Purging with Venturi Valve Design(ix) Process, Petrochemical & Nuclear MarketBypass Valves(a) Application33(b) Method of Operating34 Equalising Bypass Valves & Devices(a) Hydraulic Lock35(b) Balanced Spindle Valves35 - 36(c) Equalising Pipes & Applications36(d) Over Pressure36 - 37(e) Alternative Equalising Devices37(f) Equalising Bypass37 - 38 Types of Main Valve Operation38 - 42 Check & Non-Return Valves(a) Swing Check Valves43(b) Low & High Pressure Variants44(c) Feedwater Check Valves44(d) Vertical Lift Check Valves45(e) Comparitive Disc Movements (Vertical Lift & Swing Check)45(f) Stop Check Valves (Stop & Non-Return Valves)45(g) Tilting Disc Check Valves46 - 47(h) Bled Steam (Extraction Steam ) Non-Return Valves48 - 53(i)Features of Hopkinson Design(ii) Valve Application(iii) Competition3 Weir Valves & ControlsFirst choice for process protectionHopkinsonsINDEXWVC-HOP001-R0 Reheater Isolation Devices53 - 56 Drain & Blowdown Valves(a) Comparison of Types56 - 58(i) Wedge Gate Valve(ii) Globe Valve(iii) Ball Valve(iv) Parallel Slide Gate Valve(b) Rack & Pinion Blowdown Valves58 - 59(c) Uniflow Drain Valves59(d) High Performance Parallel Slide Gate Valves60 Water Gauges (Water Level Indicators)(a) Absolute Type60 - 61(b) Plate Glass Type61(c) Bulls Eye Type62(d) Try Valves62 ASME Section 1 Safety Valves(a) Definition of Safety Valve Types & Terms63(i) Safety Valve(ii) Relief valve(iii) Safety Relief Valve(iv) Set Pressure(v) Simmer(vi) Lift(vii) Rated Capacity(viii)Accumulation(ix) Overpressure(x) Blowdown(b) Hopkinsons Product Range & Ratings 64 - 66(i) Features & Benefits(ii) Principal Competitors(c) Hopkinsons Steam Test Facility67(d)

3 Safety Valve Mounting67(e) Hydrostatic Testing68 - 69(i) Hopkinsons Products(ii) Competitors(f) Servo Loaded Direct Acting Safety Valves69(g) Anti Simmer Devices69 - 70 Feed Water Heaters71 Feed Water Heater Bypass Systems(a) Electrically Operated Gate Valves72(b) Spring Loaded Bypass Valves72 - 73(c) Competitors73(d) Atwood & Morrill 3-Way Valves73 - 74(e) Medium operated 2-Way Changeover Valves75 Combined Cycle Power Plant SystemFossil Fuel Power Plant System4 Weir Valves & ControlsFirst choice for process protectionWVC-HOP001-R0 HopkinsonsPRODUCT Support MANUAL3-way valvesCheck valvesGate valvesGlobe valvesControl butterfly valvesIsolation butterfly valvesHigh performancebutterfly valvesTriple offset butterfly valvesGlobe control valvesTurbine bypass valvesChoke valvesDesuperheatersSevere service valvesControl valve actuatorsPipeline surge absorbersPulsation dampersThermal expansioncompensatorsCheck valvesGate valvesGlobe valvesReheat isolation devicesSafety valvesSide entry ball valvesTop entry ball valvesSubsea ball valvesRotary gate valvesIntegrated systemsSpring-loaded safetyrelief valvesPilot operated safetyrelief valvesTwo-way change-over valvesThermal relief valvesTank blanketing systemPilot operated nuclearsafety valvesTriple offset butterfly valvesWeir

4 Valves & Controls The key to the success of Weir Valves & Controls isour capability to deliver engineering solutions thatadd value to the customer s process. We offer a totalpackage of products to meet end-to-end projectrequirements. Using our own analysis andconfiguration system, we will design and deliver theoptimum valves and controls solution to protect thevalue of the production rigorous programme of information managementmeans that the division is able to take a moreanticipatory role in defining the future needs andexpectations of the market by fully utilising theorganisation's critical resources to provide wholeprocess isolation and control valve solutions for theglobal a comprehensive range of engineered valveproducts Weir Valves & Controls have developed anextensive global installed base and expertise acrossa wide range of industry sectors: Power Generation General Industrial Oil & Gas Production Refining Petrochemical Chemical Pulp & Paper Desalination5 Weir Valves & ControlsFirst choice for process protectionHopkinsonsPRODUCT Support MANUALWVC-HOP001-R0 Quality assuranceWeir Valves & Controls operates qualityprogrammes to cover the full scope of theiractivities.

5 Comprehensive quality systems havebeen developed to serve the power, oil and gas andindustrial markets which they company holds approvals to: ASME Section III N , NPT , NV ASME Section I V ASME Section VIII code UV BS EN ISO 9001:1994 NF EN ISO 9001 API Q1 TO API LICENCES API 6D (6D-0182) and API 6A (6A-0445) API 526 TUV - AD MERKBLATT WRD HP 0 The Quality systems have been approved for thesupply of products to meet the requirements of thePressure Equipment Directive (PED) andcompliance modules A,D1,H,B&D have beenapplied in categories I through IV company is committed to compliance withlegislation and has an established environment andhealth and safety ongoing commitment to customer care is metthrough the process of continuous improvementand the further development of our systems andprocesses towards meeting ISO 9001 testing facilitiesAll pressure containing items are hydrostaticallytested, seat leakage tested and functionally addition, gas, packing emission, cryogenic andadvanced functional testing can be testing facilities Non-destructive examination by radiography,ultrasonics, magnetic particle and liquid penetrant.

6 Chemical analysis by computer controlled directreading emission spectrometer. Mechanical testing for tensile properties at ambientand elevated temperatures, bend and hardnesstesting. Charpy testing at ambient, elevated andsub-zero technical information can be obtained fromour Web site: Valves and Controls manufacture HopkinsonsValves and Boiler Mountings for use on steamraising plant of any size and brand products, renowned for longand dependable service life, can be seen oninstallations ranging from shell boilers for heatingand process Steam up to the highest capacity unitson electricity generating stations. In the nuclear power industry, the Hopkinsonname is synonymous with expertise in the designand production of safety related items such as fastoperating main Steam and main feed Hopkinson range of products also includesvalves for isolation, regulation, pressure relief,instrumentation and drain and specific plantprotection duties on the new generation ofCombined Cycle Gas Turbine Power Valves & ControlsFirst choice for process protectionWVC-HOP001-R0 HopkinsonsTHE HOPKINSON STORYB ritannia Works, Huddersfield, UK, the headquarters and mainfactory of Hopkinsons Early History of ValvesThe history of the development of valves containsvery little recorded information, and cannot besaid to have shown much progress beyond themost primitive stages until the beginning of the19th far back as about 230 , Philon of Byzantiumdescribed arrangements for drawing wine fromcasks.

7 Corresponding to present-day faucets forremoving beer from barrels, and even mentioned asimple design of a two-way-cock. The Romansmade use of the elementary types of valves,probably for controlling water in pipes, andamong those preserved is a bronze plug cockdiscovered in the Palace of Tiberius in Capri ( 39). This type of valve continued to be usedwith little variation until the advent of Steam as amotive power, when the screw-down stop valveand weight-loaded safety valve were apparent absence of progress in valve designfor two thousand years is obviously due to the factthat man had not yet appreciated the uses ofsteam as a source of power, and such valves aswere required called for no particular technicalskill in design and construction. The crudewooden plug valve (illustrated), dating from thelate 17th century, was probably quite adequate forthe very unexacting duties which it had the development of Steam power, however,the importance of valves as a means of promotingefficiency and safety began to be appreciated byengineers.

8 It is at this stage, in the early decades ofthe 19th century, that the Hopkinsons story wood stop valveBronze plug cockRoman stop cock opposition to the introduction of machinery in thetextile industry. However, Joseph Hopkinson believed inengineering and in the future of Steam . Hisengineering interest obviously knew no bounds,he even patented an improved design of steelstiffener for ladies corsets!Despite the hostile climate he started business in1843 in an upstairs room in Huddersfield. But evenas early as 1835 he was involved in tests toestablish the relative strength of the copper tubesin a boiler. From this evidence it can be assumedthat he was one of those engineers earnestlyinvolved with the early introduction of steampower to the textile mills of Huddersfield 1845 the business was firmly established inlarger premises, two converted cottages, inLockwood, Huddersfield. So, HopkinsonsHuddersfield seen on valves in virtually everycountry in the world, was the MarketRight from the outset Joseph Hopkinson identifiedhis market.

9 Indeed he left a hair-raising account ofwhat many boilers and boiler mountings were likewhen he began to design and manufacture crude equipment installed, and the light-hearted manner in which boilers were looked aftercaused numerous serious accidents. Frequentcases arose where boiler attendants, ignorant ofthe consequences, tied-down the weight lever ofthe safety valve in order to gain an increase insteam pressure - often with disastrous fact it was not until there was an increasedsense of responsibility, fostered by the various Steam Users Associations, and backed by reliableboiler mountings, that the boilerhouse explosionbecame a Valves & ControlsFirst choice for process protectionHopkinsonsTHE HOPKINSON STORYWVC-HOP001-R0 Views of Hopkinsons Cottage of the devastation caused by a boiler explosionThe Hopkinson StoryToday Hopkinsons Limited is located in a 16 acre(7 hectare) factory and office complex inHuddersfield employing approx.

10 500 people. Itsbusiness is that of a world leader in themanufacture of valves, for power generation, theOil & Gas industries and process andpetrochemical applications. Behind these facts is aremarkable story of inventive genius, enterpriseand dedication to quality that has earned the firmits unique international reputation over the yearssince story began at a time when there were stillmen in the prime of life who had fought at theBattle of Waterloo and before Huddersfield had arailway link with the commercial to MechanisationHuddersfield and its neighbourhood were stillaffected by the Plug Riots of 1842 (so-calledbecause men drew the plugs from factory boilers)that showed the continuing bitter 8 Weir Valves & ControlsFirst choice for process protectionWVC-HOP001-R0 HopkinsonsTHE HOPKINSON STORYA Haystack boiler of the 1840 sNote the crude repair patches (right)Hopkinsons Compound Safety ValveSafety Indicator & AlarmEarly MountingsThose were the days of the Haystack and WagonBoilers, simple, crude designs which remained ingeneral use in industry until nearly the middle ofthe century.