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Devlon® V-API thermoplastic valve seats
Innovative Thermoplastic Engineering
Issue 1
Devlon® V-API valve seats
For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz2
Proprietary material
Devlon® materials are amongst thetoughest and hardest wearingthermoplastics available. Throughproduction by spin casting we achievethe highest possible material densitycompared with gravity casting orextrusion, providing a comprehensiverange of properties including wearresistance, impact strength and improvedresistance to moisture absorption.
In Devlon V-API, James Walkerhas created a material that offers acost effective solution with superiorperformance.
James Walker’s
total control over
formulation and
mixing ensures
total control over
quality and material
provenance
What is Devlon® V-API?
Devlon® V-API has been developed byJames Walker in close cooperation withthe valve industry as the answer to thesearch for a superior valve seat material.
Specifically formulated to provideenhanced performance across a widetemperature and pressure range, DevlonV-API is now widely specified by valvemanufacturers and has rapidly gainedapproval for use by major oil and gasproducers.
Devlon V-API is a proprietary formuladeveloped by James Walker, whichincludes additives that allow the materialto perform at higher pressures andtemperatures than the majority of softvalve seat materials.
Physical Property ASTM Test Method Units Value
Tensile strength 23°C D638 MPa 79.92
Tensile strength -40°C D638 MPa 109.52
Hardness D785 Shore D 82/85
Deformation under load 140Kgf/cmat 23°C for 24 hrs D621 % 1.0 / 2.0
Charpy impact strength at 23°C D256 J/M 54.8
Water absorption 24 hrs D570 % 0.105
Water absorption saturation D570 % 3
Coefficient of friction 0.25 / 0.30 at 2000psi surface load dynamic on steel unlubricated
For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 3
Devlon® V-API technical data
Chemical 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. Applied stress
4. Duration 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
‘A’ No attack, possibly slight absorption. Negligible effect on mechanical
properties.
‘B’ Slight attack by absorption. Some swelling and a small reduction in mechanical properties likely.
‘C’ Moderate attack or appreciable absorption.
Material will have limited life.
‘D’ Material will decompose or dissolve in a short time.
Where aqueous solutions are shown the concentration as a weight percentage is given.
Aq = Aqueous Solution
SAT = Saturated Aqueous Solution
CONC = Concentrated Aqueous Solution
CHEMICAL
CONC
ENTR
ATIO
NW
EIGH
T %
Devl
on® V
-API
Acetaldehyde Aq 40 BAcetamide Aq 50 AAcetic Acid Aq 10 CAcetone AAllyl Alcohol AAmines DAmmonia Aq 10 AAmmonia Gas BAmmonium Carbonate Aq 10 AAmyl Acetate 37 AAmyl Alcohol AAniline CAntimony Trichloride Aq 10 CBarium Chloride Aq 10 ABarium Sulfate Aq 10 ABenzaldehyde BBenzene ABenzyl Alcohol CBenzoic Acid Aq SAT CBeverages Aq Alcoholic Carbonated
BB
Bitumen BBleaching Lye 10
100BB
Boric Acid Aq AButyl Acetate BButylamine CButyric Acid Aq 20 BButyric Acid BButyrolactone ACalcium Chloride (in Alcohol) 20 ACamphor ACarbon Disulfide ACarbon Tetrachloride ACarnailite Aq 10 A Catechol CChloroacetic Acid Aq 10 CChloral Hydrate CChlorine Aq 10 CChlorine Gas 100 C Chlorobenzene AChloroform CChlorosulfonic Acid Aq 10 CChromic Acid Aq 1 B Citric Acid Aq 10 BCoconut Oil ACresols D
For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 4
Devlon® V-API technical data
CHEMICAL
CONC
ENTR
ATIO
NW
EIGH
T %
Devl
on® V
-API
Cupric Sulfate Aq 0.1SAT
BB
Cyclohexane ACyclohexanol BCyclohexanone ADecalin ADibutyl Phthalate ADichlorodifluoromethane ADichloroethylene ADiethyl Ether ADiethylene Glycol Aq 90 ADiesel Oil ADimethyl Carbinol BDimethyl Formamide ADioctyl Phthalate ADioxane AEdible Oils AEthanol Aq 96 BEthyl Acetate AEthyl Chloride AEthylene Chloride BEthylene Diamine AEthylene Glycol Aq 96 BFerric Chloride Aq 5
SATBC
Ferrous Chloride Aq 10 CFluorosilicic Acid Aq 10 CFluoroethane AFreon 12 (Arcton 12) AFormaldehyde Aq 40 BFormic Acid Aq 3
10BC
Fruit Juices CONC BFurfural BHeptane AHexane AHydrobromic Acid Aq 10 CHydrochloric Acid Aq 2
10CD
Hydrofluoric Acid Aq 4 C
Hydrogen Peroxide Aq 1 CHydrogen Sulfide Aq SAT AHydroquinone B
Iodine (in Alcohol) C
Isooctane A
Isopropyl Alcohol B
Isopropyl Ether A
CHEMICAL
CONC
ENTR
ATIO
NW
EIGH
T %
Devl
on® V
-API
Lactic Acid Aq 90 BLead Acetate Aq 10 BLead Stearate ALinseed Oil ALubricating Oils (Petroleum) ALithium Bromide Aq 50 DMagnesium Chloride Aq 10 AMagnesium Hydroxide Aq 10 AMagnesium Sulphate Aq 10 AMaleic Acid Aq CONC CMalonic Acid Aq CONC CManganese Sulfate 10 AMercuric Chloride Aq 6 CMercury AMethanol BMethyl Acetate AMethyl Ethyl Ketone AMethylpyrrolidone AMethylene Chloride BMilk AMineral Oils ANaphthalene ANitric Acid Aq 0.1
10CD
Nitrobenzene BNitromethane BOleic Acid AOleum DOxalic Acid Aq 10 BOzone CParaffin APerchloroethylene BPerchloric Acid Aq CPetrol APetroleum Ether APhenol Aq 6
75DD
Phenol (Molten) DPhosphoric Acid Aq 0.3
310
BCD
Potassium Acetate Aq 50 APotassium Bicarb. Aq 60 APotassium Bromide Aq 10 APotassium Carbonate Aq 60 APotassium Chloride Aq 90 APotassium Dichromate Aq 5 BPotassium Ferricyanide Aq 30 BPotassium Ferrocyanide Aq 30 B
Potassium Hydroxide Aq 1050
AC
CHEMICAL
CONC
ENTR
ATIO
NW
EIGH
T %
Devl
on® V
-API
Potassium Permanganate Aq 1 CPotassium Sulfate Aq CONC APyridine APropane Gas AResorcinol DSalicylic Acid ASilicone Fluids ASilver Nitrate ASoap Solutions ASodium Acetate Aq 60 BSodium Bromide Aq 10 ASodium Carbonate Aq 20 ASodium Chloride Aq 10 ASodium Hydroxide Aq 10
50AB
Sodium Hypochlorite 15 CSodium Nitrate Aq 50 ASodium Silicate ASodium Sulfate Aq 90 ASodium Thiosulfate Aq 10 AStannic Sulfate Aq 10 CSteam DStearic Acid AStyrene (Monomer) ASulfur ASulfuric Acid Aq 2
5CD
Tallow ATar BTartaric Acid Aq 10 BTetrahydrofuran ATetralin AThionyl Chloride CToluene ATransformer Oil ATrichloroethylene BTriethanolamine ATrisodium Phosphate Aq 95 BUrea AVaseline AVegetable Oils AVinyl Chloride AWater AWax (Molten) AWhite Spirit AWines & Spirits BXylene AZinc Chloride Aq 10 BZinc Oxide A
Devlon® V-API valve seats
For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 5
Diff
eren
tial P
ress
ure
PS
I/(B
ar)
Temperature˚F /(°C)
Nylon 6
PEEK™
PTFE
6500(448)
6000(414)
5000(345)
4000(276)
3000(207)
2000(138)
1000(69)
00
(-18)100(38)
200(93)
300(149)
400(205)
500(260)
600(316)
DevlonDevlon ®
V-API
Pressure / temperature performance comparison
Devlon® V-API offers
better performance
than standard
polyamides or PTFE
and is significantly
more cost-effective
than PEEK™
Extensive testing carried out at the University of Leeds in the UK and by leading global valve OEMs, compared the performance of Devlon® V-API against a range of the most common thermoplastic materials used in valve seat applications.
The benefits of Devlon® V-API
• Superior pressure / temperatureoperating range in comparison to PTFE or Nylon 6
• Available in diameters from 1/2” (12mm)to 77” (1950mm)
• Available in billet form or as semi-finished or fully machined valve seats
• Excellent ‘machineability’ allowscreation of desired surface finish
• Proven in operation up to a pressure of 414bar (6000psi), subject to valve and seat design
• Proven in operation from -50°C (-58°F) to +176°C (+350°F), subject to valve and seat design
• Low moisture absorption level enhances dimensional stability
• Superior dimensional stability overPTFE in high pressure applications
• Lower frictional losses than PEEK™ (trademark of Victrex plc) products
• Exceptional resistance to wear andabrasion
• Sufficiently conformable to seal in low pressure valve applications
• Excellent life performance in soft valve seat application
2
Devol Engineering LtdUnit 2, Faulds Park Industrial Estate, Faulds Park Road, Gourock PA19 1FBTel: +44(0) 1475 657 360Fax: +44(0) 1475 657 377Email: [email protected]
Registered office: Unit 2, Faulds Park Industrial Estate, Faulds Park Road, Gourock PA19 1FB Reg No.SC043459
© James Walker 2013
BP4460 0313/1mPIIL2893341
James Walker Asia PacificTel: +65 6777 9896Fax: +65 6777 6102Email: [email protected]
James Walker AustraliaTel: +61 (0)2 9721 9500Fax: +61 (0)2 9721 9580Email: [email protected]
James Walker Benelux(Belgium)Tel: +32 3 820 7900Fax: +32 3 828 5484Email: [email protected](Netherlands)Tel: +31 (0)186 633111Fax: +31 (0)186 633110Email: [email protected]
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James Walker worldwide support & distribution
James Walker DeutschlandTel: +49 (0)40 386 0810Fax: +49 (0)40 389 3230Email: [email protected]
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Information in this publication and otherwise supplied to users is based on our general experience and is given in good faith, but because of factors which are outside our knowledge and control and affect the use of products, no warranty is given or is to be implied with respect to such information. Unless governed by type approval or contract, specifications are subject to change without notice. Statements of operating limits quoted in this publication are not an indication that these values can be applied simultaneously. Material Safety Data Sheets (MSDS) are available on request. To ensure you are working with the very latest product specifications, please consult the relevant section of the James Walker website: www.jameswalker.biz. Environmental statement: This brochure is manufactured using advanced environmentally friendly technologies and follows the strict environmental standard BS EN ISO 14001. Made from chlorine-free pulp (ECF) with post-consumer recycled fibre obtained from sustainable wood forests, and printed using vegetable-based inks, by Binfield Printers Ltd. For those who wish to reduce further their impact on the environment, this publication is also available as a PDF from: www.jameswalker.biz
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