evlon V-PI thermoplastic valve seats Issue 2 Innovative Thermoplastic Engineering
evlon V-PI valve seats What is evlon V-PI? evlon V-PI has been developed by James Walker in close cooperation with the valve industry as the answer to the search for a superior valve seat material. Specifically formulated to provide enhanced performance across a wide temperature and pressure range, evlon V-PI is now widely specified by valve manufacturers and has rapidly gained approval for use by major oil and gas producers. evlon V-PI is a proprietary formula developed by James Walker, which includes additives that allow the material to perform at higher pressures and temperatures than the majority of soft valve seat materials. James Walker s total control over formulation and mixing ensures total control over quality and material provenance Inbuilt PMI Technology In evlon V-PI, James Walker has created a material that offers a cost effective solution with superior performance performance that is protected by Positive Material Identification Technology. PMI Technology is a microscopic additive incorporated within the evlon polymer that can be identified from the smallest sample of material. In safety critical applications such as valves, it is vital that the material specified is the material used. evlon with PMI Technology gives manufacturers and end users the peace of mind that they are using genuine evlon polymer. Physical Property STM Test Method Units Value Tensile strength 23 638 MPa 79.92 Tensile strength -40 638 MPa 9.52 Hardness (ry, as cast) eformation under load 140Kgf/cm at 23 for 24 hrs 785 Shore 82/85 621 % 1.0 / 2.0 harpy impact strength at 23 256 J/M 54.8 Water absorption 24 hrs 570 % 0.5 Water absorption saturation 570 % 3 oefficient of friction 0.25 / 0.30 at 2000psi surface load dynamic on steel unlubricated 2 For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
evlon V-PI technical data hemical resistance Thermoplastic materials are used in various applications throughout most industries, therefore their resistance to corrosion or chemical attack is well documented. If a thermoplastic material absorbs or is attacked by a particular chemical either in liquid or gaseous form, then the effect on that material will depend on four factors: 1. The chemical concentration 2. Temperature 3. pplied stress 4. uration of exposure When absorption only occurs, the changes in the material are generally reversible if the chemical is removed, however if chemical attack takes place the changes are permanent. When in a chemical environment allowances must be made for possible reductions in mechanical properties of plastic materials. The exception to this rule may be in the case of a bearing where the presence of liquids on the bearing surface may act as a lubricant and increase the PV limit of the material in question. Key to chart No attack, possibly slight absorption. Negligible effect on mechanical properties. Slight attack by absorption. Some swelling and a small reduction in mechanical properties likely. Moderate attack or appreciable absorption. Material will have limited life. Material will decompose or dissolve in a short time. Where aqueous solutions are shown the concentration as a weight percentage is given. q ST = queous Solution = Saturated queous Solution ON = oncentrated queous Solution HEMIL ONENTRTION evlon V-PI cetaldehyde q 40 cetamide q 50 cetic cid q cetone llyl lcohol mines mmonia q mmonia Gas mmonium arbonate q myl cetate 37 myl lcohol niline ntimony Trichloride q arium hloride q arium Sulfate q enzaldehyde enzene enzyl lcohol enzoic cid q ST everages q lcoholic arbonated itumen leaching Lye 0 oric cid q utyl cetate utylamine utyric cid q 20 utyric cid utyrolactone alcium hloride (in lcohol) 20 amphor arbon isulfide arbon Tetrachloride arnailite q atechol hloroacetic cid q hloral Hydrate hlorine q hlorine Gas 0 hlorobenzene hloroform hlorosulfonic cid q hromic cid q 1 itric cid q oconut Oil resols For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 3
evlon V-PI technical data HEMIL ONENTRTION upric Sulfate q 0.1 ST yclohexane yclohexanol yclohexanone ecalin ibutyl Phthalate ichlorodifluoromethane ichloroethylene iethyl Ether evlon V-PI iethylene Glycol q 90 iesel Oil imethyl arbinol imethyl Formamide ioctyl Phthalate ioxane Edible Oils Ethanol q 96 Ethyl cetate Ethyl hloride Ethylene hloride Ethylene iamine Ethylene Glycol q 96 Ferric hloride q 5 ST Ferrous hloride q Fluorosilicic cid q Fluoroethane Freon 12 (rcton 12) Formaldehyde q 40 Formic cid q 3 Fruit Juices ON Furfural Heptane Hexane Hydrobromic cid q Hydrochloric cid q 2 Hydrofluoric cid q 4 Hydrogen Peroxide q 1 Hydrogen Sulfide q ST Hydroquinone Iodine (in lcohol) Isooctane Isopropyl lcohol Isopropyl Ether HEMIL ONENTRTION evlon V-PI Lactic cid q 90 Lead cetate q Lead Stearate Linseed Oil Lubricating Oils (Petroleum) Lithium romide q 50 Magnesium hloride q Magnesium Hydroxide q Magnesium Sulphate q Maleic cid q ON Malonic cid q ON Manganese Sulfate Mercuric hloride q 6 Mercury Methanol Methyl cetate Methyl Ethyl Ketone Methylpyrrolidone Methylene hloride Milk Mineral Oils Naphthalene Nitric cid q 0.1 Nitrobenzene Nitromethane Oleic cid Oleum Oxalic cid q Ozone Paraffin Perchloroethylene Perchloric cid q Petrol Petroleum Ether Phenol q 6 75 Phenol (Molten) Phosphoric cid q 0.3 3 Potassium cetate q 50 Potassium icarb. q 60 Potassium romide q Potassium arbonate q 60 Potassium hloride q 90 Potassium ichromate q 5 Potassium Ferricyanide q 30 Potassium Ferrocyanide q 30 Potassium Hydroxide q 50 HEMIL ONENTRTION evlon V-PI Potassium Permanganate q 1 Potassium Sulfate q ON Pyridine Propane Gas Resorcinol Salicylic cid Silicone Fluids Silver Nitrate Soap Solutions Sodium cetate q 60 Sodium romide q Sodium arbonate q 20 Sodium hloride q Sodium Hydroxide q 50 Sodium Hypochlorite 15 Sodium Nitrate q 50 Sodium Silicate Sodium Sulfate q 90 Sodium Thiosulfate q Stannic Sulfate q Steam Stearic cid Styrene (Monomer) Sulfur Sulfuric cid q 2 5 Tallow Tar Tartaric cid q Tetrahydrofuran Tetralin Thionyl hloride Toluene Transformer Oil Trichloroethylene Triethanolamine Trisodium Phosphate q 95 Urea Vaseline Vegetable Oils Vinyl hloride Water Wax (Molten) White Spirit Wines & Spirits Xylene Zinc hloride q Zinc Oxide For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 4
evlon V-PI valve seats Pressure / temperature performance comparison 6500 (448) 6000 (414) 5000 (345) Extensive testing carried out at the University of Leeds in the UK and by leading global valve OEMs, compared the performance of evlon V-PI against a range of the most common thermoplastic materials used in valve seat applications. Nylon 6 ifferential Pressure PSI/(ar) 4000 (276) 3000 (207) evlon V-PI PEEK evlon V-PI offers 2000 (138) better performance than standard 00 (69) PTFE polyamides or PTFE and is significantly 0 0 (-18) 0 (38) 200 (93) 300 (149) Temperature F /( ) 400 (205) 500 (260) 600 (316) more cost-effective than PEEK The benefits of evlon V-PI Superior pressure / temperature operating range in comparison to PTFE or Nylon 6 vailable in diameters from 1/2 (12mm) to 77 (1950mm) vailable in billet form or as semifinished or fully machined valve seats Excellent machineability allows creation of desired surface finish Total assurance of product quality and traceability with Positive Material Identification Technology Proven in operation up to a pressure of 414bar (6000psi), subject to valve and seat design Proven in operation from -50 (-58 F) to +176 (+350 F), subject to valve and seat design Low moisture absorption level enhances dimensional stability Superior dimensional stability over PTFE in high pressure applications Lower frictional losses than PEEK (trademark of Victrex plc) products Exceptional resistance to wear and abrasion Sufficiently conformable to seal in low pressure valve applications Excellent life performance in soft valve seat application For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 5
James Walker worldwide support & distribution James Walker sia Pacific Tel: +65 6715 6300 Fax: +65 6715 6301 sales.sg@jameswalker.biz James Walker hina Tel: +86 21 6876 9351 Fax: +86 21 6876 9352 sales.cn@jameswalker.biz James Walker Ireland Tel: +353 (0)21 432 3626 Fax: +353 (0)21 432 3623 sales.ie@jameswalker.biz James Walker Norge Tel: +47 22 75 75 00 sales.no@jameswalker.biz James Walker ustralia Tel: +61 (0)2 9721 9500 Fax: +61 (0)2 9721 9580 sales.au@jameswalker.biz James Walker eutschland Tel: +49 (0)40 386 08 Fax: +49 (0)40 389 3230 sales.de@jameswalker.biz James Walker Italiana Tel: +39 02 257 8308 Fax: +39 02 263 00487 sales.it@jameswalker.biz James Walker Oil & Gas (US) Tel: +1 281 875 0002 Fax: +1 281 875 0188 oilandgas@jameswalker.biz James Walker enelux (elgium) Tel: +32 3 820 7900 Fax: +32 3 828 5484 sales.be@jameswalker.biz (Netherlands) Tel: +31 (0)186 633111 Fax: +31 (0)186 6331 sales.nl@jameswalker.biz James Walker France Tel: +33 (0)437 497 480 Fax: +33 (0)437 497 483 sales.fr@jameswalker.biz James Walker Iberica Tel: +34 94 447 0099 Fax: +34 94 447 77 sales.es@jameswalker.biz James Walker Middle East Tel: +971 4 817 8888 sales.jwme@jameswalker.biz James Walker Mfg (US) Tel: +1 708 754 4020 Fax: +1 708 754 4058 sales.jwmfg.us@jameswalker.biz James Walker South frica Tel: +27 (0)31 304 0770 Fax: +27 (0)31 304 0791 sales.za@jameswalker.biz James Walker UK Tel: +44 (0)1270 536000 Fax: +44 (0)1270 5360 sales.uk@jameswalker.biz James Walker rasil Tel: +55 11 4392 7360 Fax: +55 11 4392 5976 sales.br@jameswalker.biz James Walker Inmarco (India) Tel: +91 (0)22 4080 8080 Fax: +91 (0)22 2859 6220 lionpak@jwinmarco.com James Walker New Zealand Tel: +64 (0)9 272 1599 Fax: +64 (0)9 272 3061 sales.nz@jameswalker.biz Information given in this publication is given in good faith and represents the results of specific individual tests carried out by James Walker in accordance with the methodologies described in this publication, performed in a laboratory. No representation or warranty is given in relation to such information. Values and/or operating limits given in this publication are not an indication that these values and/or operating limits can be applied simultaneously. While such results may comprise useful additional information and are industry standard tests, they are no substitute for conducting (or procuring from James Walker) your own tests and engineering analysis and satisfying yourself as to the suitability of the material you select. Please also note that material tested in accordance with the published methodology may not perform to such values in application and/or under different test conditions or methodologies for a variety of reasons, including but not limited to the environment in which it is used/tested or which passes through it or otherwise affects the material, or due to the design of the product made with the material, handling, storage or installation, or due to the effect of housing or other parts. Our personnel will be happy to discuss any historical examples we have of the material having been previously used in a particular application. Environmental statement: This brochure is manufactured using advanced environmentally friendly technologies and follows the strict environmental standard S EN ISO 14001. Made from chlorine-free pulp (EF) with post-consumer recycled fibre obtained from sustainable wood forests, and printed using vegetable-based inks, by infield Printers Ltd. For those who wish to reduce further their impact on the environment, this publication is also available as a PF from: www.jameswalker.biz 2 P4702 0118/50 PIIL2893341 James Walker Sealing Products & Services Ltd. Registered Office: Lion House, Oriental Road, Woking, Surrey GU22 8P, United Kingdom. Reg no: 00264191 England James Walker 2018