1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2<html xmlns="http://www.w3.org/1999/xhtml"><!-- InstanceBegin template="/Templates/pagenav.dwt" codeOutsideHTMLIsLocked="false" --> 3 4<head> 5<!-- InstanceBeginEditable name="doctitle" --> 6 7<title>Valves, Valve Supply, Valve Overhaul, Valve Refurbishment, Valve Repair, Valve Repairs, Industrial Valve Repair, valve maintenance, Valves and Repair Services, Ball Valves, Ball Valve, Check Valves, All Types Of Valves</title> 8<meta name="keywords" content="Valves, Valve Repairs, Ball Valves, Butterfly Valves, Industrial Valve Repair, Stoneleigh Engineering Services, Engineering Services, Stoneleigh, Types of valves, Valves, Gauges, Hoses, Gaskets, Valve Refurbishment, Valve Repairs, pipe fittings, UK Valve Refurbishment, UK Valve Repairs, UK pipe fittings, Africa Valve Refurbishment, Africa Valve Repairs, Africa pipe fittings, Middle East valve Refurbishment, Middle East Valve Repairs, Middle East pipe fittings, flanges, fittings, valve fittings, valve supplies, oil refineries, power stations, breweries, chemical works, sugar refineries, utility organisations, control valves, gate valves, globe valves, relief valves, safety valves, high pressure ball valve, 3 way ball valve, actuated ball valve, ball valve 1 4, ball valve actuator, ball valve float, brass ball valve, ball valve manufacturer, flanged ball valve, ball valve, stainless steel ball valve, electric ball valve, pvc ball valve, 3 way ball valves, brass ball valves, stainless steel ball valves, ball valves, flanged ball valves, stainless ball valves, pvc ball valves, stainless steel pipe, stainless steel pipe fittings, stainless steel fittings, check valve, double check valve, plastic check valve, brass check valve, pvc check valve, butterfly valves, check valves, butterfly valve, wafer butterfly valve, needle valves, plumbing valves, stainless valves, valves manufacturers, water valves, relief valves, solenoid valves, valves gate, valves, process valves, electric valves, steam valves, Middle East, Africa, ray hudd, Blakeborough valves, Nabicvalves, Sempell valves, Bailey valves, Crosby valves, David Auld valves, Farris valves, Fisher valves, Honeywell valves, Hopkinsons valves, Introl valves, Lesser valves, Samson valves, Seetru valves, Triangle valves, Valtek valves, " /> 9<meta name="description" content="Stoneleigh Engineering Services cater for all Types of Valves. Supply - New Valves to Full Refubishment of existing stock" /> 10 11 12<meta name="y_key" content="556ed4f978a96db3" /> 13 14<!-- InstanceEndEditable --> 15 16 17<style type="text/css"> 18@import url(css/reset.css); 19@import url(css/body.css); 20@import url(css/header.css); 21@import url(css/nav.css); 22@import url(css/navside.css); 23@import url(css/page.css); 24@import url(css/footer.css); 25</style> 26<!-- InstanceBeginEditable name="head" --> 27 28<!-- InstanceEndEditable --> 29</head> 30 31<body> 32 33<div id="site"> 34 35<div id="header"> 36<img src="images/header_top.jpg" width="974" height="7" alt="" /> 37<div id="logo"><a href="index.html"><img src="images/Stoneleigh_logo.gif" alt="Stoneleigh Engineering Services home button" width="258" height="95" /></a></div> 38<div id="info"> 39<ul> 40<li><a href="index.html">Home</a></li> 41<li><a href="contact.html">Contact Us</a></li> 42<li><a href="downloads.html">Downloads</a></li> 43<li class="last"><a href="siteMap.html">Site Map</a></li> 44</ul> 45</div> 46 47<div id="contact"> 48<ul> 49<li>Tel: +44 (0) 208 305 0792</li> 50<li>FAX: +44 (0) 208 858 0101</li> 51<li class="last"><a href="mailto:[email protected]">[email protected]</a></li> 52</ul> 53</div> 54</div> 55<!-- end of header div --> 56 57 58<div id="nav"> 59<ul> 60<li class="first"><a href="index.html">Home</a></li> 61<li><a href="exports.html">Export</a></li> 62<li><a href="supply.html">UK Services</a></li> 63<li><a href="valvemaintenance.html">Valve Maintenance</a></li> 64<li><a href="case.html">Existing Customers </a></li> 65<li class="last"><a href="natoList.html">NATO Spares List</a></li> 66</ul> 67</div> 68 69 70<div id="navside"> 71 72<img src="images/topic_top.jpg" alt="" /> 73<div class="topic"> 74<h2>Product menu</h2> 75</div> 76<ul class="listLink" > 77<li><a href="valves.html">Valves - General </a></li> 78<li><a href="ballvalve.html">
78Ball Valves</a></li> 79<li><a href="actuator.html">Actuators</a></li> 80<li><a href="flanges.html">Flanges</a></li> 81<li><a href="gaskets.html">Gaskets plus Seals </a></li> 82<li><a href="hoses.html">Hoses</a></li> 83<li><a href="packings.html">Types of Packings</a></li> 84<li><a href="pipeexpansionjoints.html">Pipe Expansion Joints</a></li> 85<li><a href="pipefittings.html">Pipe Fittings plus misc </a></li> 86<li><a href="valveendconnections.html">Valve End Connections</a></li> 87 88</ul> 89 90<img src="images/topic_top.jpg" alt="" /> 91<div class="topic"> 92<h2>Services menu</h2> 93</div> 94<ul class="listLink" > 95<li><a href="http://www.hydraulic-ram-repairs.com">Hydraulic Ram and Hose Repairs</a></li> 96<li><a href="Instrumentation.html">Instrumentation</a></li> 97<li><a href="refurbishedstock.html"> Stock - Refurbished</a></li> 98<li><a href="valveoverhaul.html">Valves - Overhaul </a></li> 99<li><a href="valverepair.html">Valves - Repairs </a></li> 100 101 102<li><a href="control_valve_spares.html">Control Valve Spares </a></li> 103 104 105<li><a href="onsiteservices.html">Site Services Offered </a></li> 106</ul> 107 108<img src="images/topic_top.jpg" alt="" /> 109<div class="topic"> 110<h2>Extras menu</h2> 111</div> 112<ul class="listLink" > 113<li><a href="forsale.html">Items For Sale!!!</a></li> 114</ul> 115 116<ul class="listLink" > 117<li><a href="valvematerials.html">Valve Body Materials</a></li> 118</ul> 119 120 121<ul class="listLink" > 122<li><a href="reducingvalve.html">Reducing Valves </a></li> 123</ul> 124 125<ul class="listLink" > 126<li><a href="valvehistory.html">History of Valves</a></li> 127</ul> 128 129<ul class="listLink" > 130<li><a href="codesstandards.html">Codes and Standards</a></li> 131</ul> 132 133<ul class="listLink" > 134<li><a href="valveoverhaul_healthandsafety.html">Health and Safety</a></li> 135</ul> 136</div><!-- end of navside div --> 137 138 139<!-- InstanceBeginEditable name="page content" --> 140<div id="page"> 141<div class="home"><br /> 142 <img class="banner" height="195" alt="" width="774" src="images/header_home.jpg" /> 143 <div class="bannertext"> 144<h3>Stoneleigh Engineering is proud to be involved in the supply & maintenance of Valves & Fittings. We are UK Government approved, 145serving Ministry of Defence & The Royal Navy to Food, Petroleum & Marine Industries.</h3> 146 </div> 147<div class="col" onclick="window.location='overview.html#gatevalve';"> 148<div class="colhead"> 149<h3>Gate, Globe, Pressure<br /> 150& Check Valves</h3> 151</div><img alt="" src="images/valve.jpg" /> 152<div class="coltext"> 153<h5>Choose from Forged Steel, Cast or Wafer Check</h5> 154<p>These types of Valve come in a wide range of Materials, Pressure and Temperature ratings.</p></div> 155<div class="colfoot"> 156<h5><a href="overview.html#gate">view more details</a></h5></div></div> 157<div class="col" onclick="window.location='overview.html#instruments';"> 158<div class="colhead"> 159<h3>Instruments, Gauges,<br /> 160Gaskets & Hoses</h3></div><img alt="" src="images/gauge.jpg" /> 161<div class="coltext"> 162<h5>Vast array of equipment is available to offer </h5> 163<p>Ranging from Pressure, Temperature, Vacuum, Refrigeration, Sight and Level made to order.</p></div> 164<div class="colfoot"> 165<h5><a href="overview.html#instrumentsgauges">view more details</a></h5></div></div> 166<div class="col" onclick="window.location='overview.html#valve';"> 167<div class="colhead"> 168<h3>Butterfly & 169Ball Valves</h3></div><img alt="" src="images/ball.jpg" /> 170<div class="coltext"> 171<h5>We can offer a wide range of Valves</h5> 172<p>1,2 and 3 Piece, Trunion Mounted, Fire Safe, Multiport and NACE Ball Valves. <br /> 173<br /></p></div> 174<div class="colfoot"> 175<h5><a href="overview.html#valve">view more details</a></h5></div></div> 176<div class="col last" onclick="window.location='overview.html#refurb';"> 177<div class="colhead"> 178<h3 class="small">Valve Refurbishment, Overhaul,<br /> 179Installation & Maintenance</h3></div> 180<img src="images/Stoneleighworks-1.JPG" alt="" width="480" height="320" /> 181<div class="coltext"> 182<h5>Complete valve repair & refurbishment service at our Charlton Workshops </h5> 183<p>We carry out repairs to the whole range of valves currently in use from 1/2" to 36".</p></div> 184<div class="colfoot"> 185<h5><a href="overview.html#refurb">view more details</a></h5></div></div> 186<div class="col double" onclick="window.location='exports.html';"> 187<div class="colhead"> 188<h3>Global Services</h3></div><img alt="" src="images/global_large.jpg" /> 189<div class="coltext"> 190<h5>We understand the international market environment.</h5> 191<p>We have proven expertise and skills in this field build up over many years. We assist our clients in procurement, supply, shipping and payment procedures. </p></div> 192<div class="colfoot"> 193<h5><a href="exports.html">view more details</a></h5></div></div> 194<div class="col double last" onclick="window.location='natoList.html';"> 195<div class="colhead"> 196<h3>NATO list</h3></div><img height="135" alt="" width="381" src="images/nato_List_big01.jpg" /> 197<div class="coltext"> 198<h5>Download our weekly NATO List</h5> 199<p>NATO Numbers are the unique thumb print for every item purchased by the M.O.D. We update our list in response to the requests to supply of new items.</p></div> 200<div class="colfoot"> 201<h5><a href="natoList.html">view more details</a></h5> 202</div></div></div> 203<hr /> 204<br /> 205<h1><a name="valves1" id="valves1"></a>Types of Valves </h1> 206 207<p>Please click for general information on <a href="index.html#Basic">basic valve types</a> or <a href="index.html#specific">
207specific valve types</a></p> 208 209 210<p><strong>Types</strong></p> 211<p>Valves are quite diverse and may be classified into a number of basic types. Valves may also be classified by how they are actuated: </p> 212<ul><li>Hydraulic </li> 213<li>Solenoid </li> 214<li>Motor</li> 215 <li>Pneumatic </li> 216 <li>Manual </li> 217 218 219</ul> 220<p><strong><a name="Basic" id="Basic"></a>Basic types 221Valves can be categorized into the following: </strong></p> 222<ul> 223 <li> <strong>Duplex ball</strong>, for on/off control without pressure drop, and ideal for quick shut-off since a 90deg turn offers complete shut-off angle, compared to multiple turns required on most manual valves. </li> 224 <li><strong>Butterfly</strong>, for flow regulation in large pipe diameters. </li> 225 <li><strong>Choke</strong>, a valve that raises or lowers a solid cylinder which is placed around or inside another cylinder which has holes or slots. Used for high pressure drops found in oil and gas wellheads. </li> 226 <li><strong>Check or non-return</strong>, allows the fluid to pass in one direction only. </li> 227 <li><strong>Hastelloy check valve Diaphragm valves</strong>, some are sanitary predominantly used in the pharmaceutical and foodstuff industry. </li> 228 <li><strong>Ceramic Disc</strong>, used mainly in high duty cycle applications or on abrasive fluids. Ceramic disc can also provide Class IV seat leakage </li> 229 <li><strong>Gate</strong>, mainly for on/off control, with low pressure drop. </li> 230 <li><strong>Stainless steel Globe</strong>, good for regulating flow. 231 Knife valve, for slurries or powders on/off control. 232 Needle valve for accurate flow control. </li> 233 <li><strong>Piston</strong>, for regulating fluids that carry solids in suspension. 234 Pinch valve, for slurry flow regulation. </li> 235 <li><strong>Plug</strong>, slim valve for on/off control but with some pressure drop. </li> 236 <li><strong>Pressure Valves, </strong>a safety device that relieves overpressure in a vessel or piping.</li> 237 <li><strong>Spool</strong>, for hydraulic control 238 Thermal expansion valve, used in refrigeration and air conditioning systems. </li> 239 <li><strong>Poppet</strong>, commonly used in piston engines to regulate the fuel mixture intake and exhaust</li> 240</ul> 241<p><strong><a name="Specific" id="Specific"></a>Specific valve types:</strong></p> 242<ul> 243 <li>4-stroke cycle engine valves: an application of piston valve</li> 244 <li>Aspin: a cone-shaped metal part fitted to the cylinder head of an engine</li> 245 <li>Ball cock: often used as a water level controller (cistern) </li> 246 <li>Bibcock: provides a connection to a flexible hosepipe </li> 247 <li>Blast: prevents rapid overpressures in a fallout shelter or a bunker 248 Cock: colloquial term for a small valve or a stopcock </li> 249 <li>Demand: on a diving regulator </li> 250 <li>Double beat or 251 Double check valves </li> 252 <li>Duckbill or Flipper valves </li> 253 <li>Flow control: an application which maintains a constant flow rate through the valve </li> 254 <li>Heimlich: a specific one-way valve used on the end of chest drain tubes to treat a pneumothorax </li> 255 <li>Foot: a check valve on the foot of a suction line to prevent backflow </li> 256 <li>Four-way: was used to control the flow of steam to the cylinder of early double-acting steam engines </li> 257 <li>Freeze seal/Freeze plug: in which freezing and melting the fluid creates and removes a plug of frozen material acting as the valve </li> 258 <li>Gas pressure regulator regulates the flow and pressure of a gas 259 Heart valve: regulates blood flow through the heart in many organisms </li> 260 <li>Leaf: one-way valves consisting of a diagonal obstruction with an opening covered by a hinged flap </li> 261 <li>Pilot: regulate flow or pressure to other valves </li> 262 <li>Poppet and sleeve valves: commonly used in piston engines to regulate the fuel mixture intake and exhaust </li> 263 <li>Pressure regulator or pressure reducing valve (PRV): reduces pressure to a preset level downstream of the valve </li> 264 <li>Pressure sustaining valves, or back-pressure regulator: maintains pressure at a preset level upstream of the valve </li> 265 <li>Presta and Schrader valves are used to hold the air in bicycle tires </li> 266 <li>Reed: consists of two or more flexible materials pressed together along much of their length, but with the influx area o
266pen to allow one-way flow, much like a heart valve </li> 267 <li>Regulator: used in SCUBA diving equipment and in gas cooking equipment to reduce the high pressure gas supply to a lower working pressure </li> 268 <li>Rocker, Rotary and piston valves: parts of brass instruments used to change their pitch </li> 269 <li>Rupture disc: a one time use replaceable valve for rapid pressure relief, used to protect piping systems from excessive pressure or vacuum; more reliable than a safety valve </li> 270 <li>Saddle valves: where allowed, is used to tap a pipe for a low-flow need </li> 271 <li>Safety or relief valves: operates automatically at a set differential pressure to correct a potentially dangerous situation, typically over-pressure </li> 272 <li>Schrader valves: used to hold the air inside automobile tires 273 Solenoid valve: an electrically controlled hydraulic or pneumatic valve </li> 274 <li>Stopcock: restricts or isolates flow through a pipe 275 Swirl valve: A specially designed </li> 276 <li>Joule-Thompson pressure reduction/expansion valve imparting a centrifugal force upon the discharge stream for improving gas-liquid phase separation </li> 277 <li>Tap (British English), faucet (American English): the common name for a valve used in homes to regulate water flow 278 Thermal expansion valve, used in air conditioning and refrigeration systems. </li> 279 <li>Thermostatic Mixing Valves, 280 Thermostatic Radiator Valve 281 Trap primer: sometimes include other types of valves, or are valves themselves 282 Vacuum breaker valve: prevents the back-siphonage of contaminated water into pressurized drinkable water supplies</li> 283</ul> 284 285<p>The valve is a unit that regulates the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but sometimes referred to in a different category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. </p> 286<p>Valves are used in a variety of contexts, including industrial, government, military, commercial, residential, and transport. </p> 287<p>The industries in which the majority of valves are used are oil and gas, power generation, mining, water reticulation, paper mills, refinery, sewerage and chemical manufacturing. </p> 288<p>Common valves are plumbing valves, for example taps for hot and cold tap water are the most visable types of valves. Other valves experienced on a daily basis include gas control valves on cookers, small valves fitted to washing machines and dishwashers, and safety devices fitted to hot water systems.</p> 289<p>Valves may be operated manually, by a hand wheel, lever or pedal. Valves may also be automatic, driven by changes in pressure, temperature, or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers.</p> 290<p>More complex control type systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements.</p> 291</div> 292 <!-- end of page div --> 293 294 295<!-- InstanceEndEditable --> 296 297 298<div id="footer"> 299<a href="clients.html"><img src="images/stoneleigh_footer_logos.gif" alt="We are proud to serve: Heinz, The National Grid, The NHS, The Royal Navy, Guinness, The Bank of England, The VT Group and many more. View Clients." /></a> 300<div class="copy"> 301<ul> 302<li>© Stoneleigh Engineering Services 1987-2012</li> 303<li class="last">VAT Reg No: GB437 1725 50</li> 304</ul> 305 306</div> 307<img src="images/footer_bottom.jpg" width="974" height="9" alt="" /></div> 308 309 310</div><!-- end of site div --> 311 312<div id="design"> 313 <p>Partner Companies: <a href="http://www.hydraulic-ram-repairs.com">Hydraulic RAM Repairs UK </a><a href="http://www.hydraulic-hose-repairs.com"> & Hydraulic Hose Repairs UK</a></p> 314 <p>WEB site created by: <a href="partnerpage.html">
314www.d2-solutions.co.uk</a></p> 315</div> 316 317 318<!-- GOOGLE ANALYTICS --> 319
320<script type="text/javascript"> 321var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); 322document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); 323</script>
vendor: 1 bytes, line 323
323
324<script type="text/javascript"> 325try { 326var pageTracker = _gat._getTracker("UA-16046936-1"); 327pageTracker._trackPageview(); 328} catch(err) {}</script>
328 329 330<!-- /GOOGLE ANALYTICS --> 331 332</body> 333<!-- InstanceEnd --></html>
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.