Devlon® V-API thermoplastic valve seats

Innovative Thermoplastic Engineering

Devlon® V-API valve seats

For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz2

James Walker’s

total control over

formulation and

mixing ensures

total control over

quality and material

provenance

Inbuilt PMI Technology

In Devlon V-API, 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 Devlon 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. Devlon with PMI Technology gives manufacturers and end users the peace of mind that they are using genuine Devlon polymer.

Physical Property ASTM Test Method Units Value

Tensile strength 23°C D638 MPa 79.92

Tensile strength -40°C D638 MPa 109.52

Hardness (Dry, as cast) D785 Shore D 82/85

Deformation under load 140Kgf/cm at 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

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.

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

CarbonatedBB

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 Sulphide Aq SATHydroquinone 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

B

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 / temperature operating 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’ 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°C (-58°F) to +176°C (+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

James Walker Sealing Products & Services Ltd

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James Walker Worldwide

Information given in this publication is given in good faith and represents the results of specific individual tests carried out by James Walker or third parties 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 product you select. Please also note that a product 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 product, or due to the 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 a product having been previously used in a particular application.

To ensure you are working with the very latest product specifications, please consult the relevant section of the James Walker website: www.jameswalker.biz.

Issue number 3

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