Devlon® V-API thermoplastic valve seats
Issue 1
Innovative Thermoplastic Engineering
Devlon® V-API valve seats
Proprietary material
What is Devlon® V-API?
Devlon® materials are amongst the
toughest and hardest wearing
thermoplastics available. Through
production by spin casting we achieve
the highest possible material density
compared with gravity casting or
extrusion, providing a comprehensive
range of properties including wear
resistance, impact strength and improved
resistance to moisture absorption.
Devlon® V-API 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.
In Devlon V-API, James Walker
has created a material that offers a
cost effective solution with superior
performance.
James Walker’s
total control over
Specifically formulated to provide
enhanced performance across a wide
temperature and pressure range, Devlon
V-API is now widely specified by valve
manufacturers and has rapidly gained
approval for use by major oil and gas
producers.
formulation and
mixing ensures
total control over
Devlon V-API 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.
quality and material
provenance
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/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
2
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
Key to chart
Thermoplastic materials are used in
various applications throughout most
industries, therefore their resistance
to corrosion or chemical attack is well
documented.
‘A’ No attack, possibly slight absorption.
Negligible effect on mechanical
properties.
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
‘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.
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.
Where aqueous solutions are shown the
concentration as a weight percentage is
given.
Aq
=Aqueous Solution
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.
SAT
=Saturated Aqueous Solution
CONC=Concentrated Aqueous Solution
Devlon® V-API
Chemical resistance
CONCENTRATION
WEIGHT %
Devlon® V-API technical data
Acetaldehyde Aq
40
B
Acetamide Aq
50
A
Acetic Acid Aq
10
C
CHEMICAL
Acetone
A
Allyl Alcohol
A
Amines
D
Ammonia Aq
10
Ammonia Gas
A
B
Ammonium Carbonate Aq
10
A
Amyl Acetate
37
A
Amyl Alcohol
A
Aniline
C
Antimony Trichloride Aq
10
C
Barium Chloride Aq
10
A
Barium Sulfate Aq
10
Benzaldehyde
A
B
Benzene
A
Benzyl Alcohol
C
Benzoic Acid Aq
SAT
Beverages Aq Alcoholic
Carbonated
Bitumen
Bleaching Lye
10
100
Boric Acid Aq
C
B
B
B
B
B
A
Butyl Acetate
B
Butylamine
C
Butyric Acid Aq
20
Butyric Acid
B
Butyrolactone
Calcium Chloride (in Alcohol)
B
A
20
A
Camphor
A
Carbon Disulfide
A
Carbon Tetrachloride
Carnailite Aq
A
10
Catechol
Chloroacetic Acid Aq
A
C
10
Chloral Hydrate
C
C
Chlorine Aq
10
C
Chlorine Gas
100
C
Chlorobenzene
A
Chloroform
C
Chlorosulfonic Acid Aq
10
C
Chromic Acid Aq
1
B
Citric Acid Aq
10
B
Coconut Oil
A
Cresols
D
For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
3
Cupric Sulfate Aq
Cyclohexane
Cyclohexanol
Cyclohexanone
Decalin
Dibutyl Phthalate
Dichlorodifluoromethane
Dichloroethylene
Diethyl Ether
Diethylene Glycol Aq
Diesel Oil
Dimethyl Carbinol
Dimethyl Formamide
Dioctyl Phthalate
Dioxane
Edible Oils
Ethanol Aq
Ethyl Acetate
Ethyl Chloride
Ethylene Chloride
Ethylene Diamine
Ethylene Glycol Aq
Ferric Chloride Aq
Ferrous Chloride Aq
Fluorosilicic Acid Aq
Fluoroethane
Freon 12 (Arcton 12)
Formaldehyde Aq
Formic Acid Aq
Fruit Juices
Furfural
Heptane
Hexane
Hydrobromic Acid Aq
Hydrochloric Acid Aq
Hydrofluoric Acid Aq
Hydrogen Peroxide Aq
Hydrogen Sulfide Aq
Hydroquinone
Iodine (in Alcohol)
0.1
SAT
10
2
10
B
B
A
B
A
A
A
A
A
A
A
A
B
A
A
A
A
B
A
A
B
A
B
B
C
C
C
A
A
B
B
C
B
B
A
A
C
C
D
4
C
1
SAT
C
A
90
96
96
5
SAT
10
10
40
3
10
CONC
B
C
Isooctane
A
Isopropyl Alcohol
B
Isopropyl Ether
A
Lactic Acid Aq
Lead Acetate Aq
Lead Stearate
Linseed Oil
Lubricating Oils (Petroleum)
Lithium Bromide Aq
Magnesium Chloride Aq
Magnesium Hydroxide Aq
Magnesium Sulphate Aq
Maleic Acid Aq
Malonic Acid Aq
Manganese Sulfate
Mercuric Chloride Aq
Mercury
Methanol
Methyl Acetate
Methyl Ethyl Ketone
Methylpyrrolidone
Methylene Chloride
Milk
Mineral Oils
Naphthalene
Nitric Acid Aq
Nitrobenzene
Nitromethane
Oleic Acid
Oleum
Oxalic Acid Aq
Ozone
Paraffin
Perchloroethylene
Perchloric Acid Aq
Petrol
Petroleum Ether
Phenol Aq
Phenol (Molten)
Phosphoric Acid Aq
Potassium Acetate Aq
Potassium Bicarb. Aq
Potassium Bromide Aq
Potassium Carbonate Aq
Potassium Chloride Aq
Potassium Dichromate Aq
Potassium Ferricyanide Aq
Potassium Ferrocyanide Aq
Potassium Hydroxide Aq
90
10
0.3
3
10
50
60
10
60
90
5
30
30
B
B
A
A
A
D
A
A
A
C
C
A
C
A
B
A
A
A
B
A
A
A
C
D
B
B
A
D
B
C
A
B
C
A
A
D
D
D
B
C
D
A
A
A
A
A
B
B
B
10
50
A
C
50
10
10
10
CONC
CONC
10
6
0.1
10
10
6
75
Potassium Permanganate Aq
Potassium Sulfate Aq
Pyridine
Propane Gas
Resorcinol
Salicylic Acid
Silicone Fluids
Silver Nitrate
Soap Solutions
Sodium Acetate Aq
Sodium Bromide Aq
Sodium Carbonate Aq
Sodium Chloride Aq
Sodium Hydroxide Aq
Sodium Hypochlorite
Sodium Nitrate Aq
Sodium Silicate
Sodium Sulfate Aq
Sodium Thiosulfate Aq
Stannic Sulfate Aq
Steam
Stearic Acid
Styrene (Monomer)
Sulfur
Sulfuric Acid Aq
Tallow
Tar
Tartaric Acid Aq
Tetrahydrofuran
Tetralin
Thionyl Chloride
Toluene
Transformer Oil
Trichloroethylene
Triethanolamine
Trisodium Phosphate Aq
Urea
Vaseline
Vegetable Oils
Vinyl Chloride
Water
Wax (Molten)
White Spirit
Wines & Spirits
Xylene
Zinc Chloride Aq
Zinc Oxide
For further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
1
CONC
60
10
20
10
10
50
15
50
90
10
10
2
5
10
95
10
Devlon® V-API
CHEMICAL
CONCENTRATION
WEIGHT %
Devlon® V-API
CHEMICAL
CONCENTRATION
WEIGHT %
CHEMICAL
Devlon® V-API
CONCENTRATION
WEIGHT %
Devlon® V-API technical data
C
A
A
A
D
A
A
A
A
B
A
A
A
A
B
C
A
A
A
A
C
D
A
A
A
C
D
A
B
B
A
A
C
A
A
B
A
B
A
A
A
A
A
A
A
B
A
B
A
4
Devlon® V-API valve seats
Pressure / temperature performance comparison
6500
(448)
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.
6000
(414)
®
lon
Dev
4000
(276)
™
EK
PE
I
P
V-A
Differential Pressure
PSI/(Bar)
Nylon 6
5000
(345)
3000
(207)
Devlon® V-API offers
better performance
2000
(138)
FE
PT
than standard
1000
(69)
polyamides or PTFE
and is significantly
0
0
(-18)
100
(38)
200
(93)
300
(149)
400
(205)
500
(260)
600
(316)
Temperature
˚F /(°C)
more cost-effective
than PEEK™
The benefits of Devlon® V-API
• Superior pressure / temperature
operating range in comparison to PTFE
or Nylon 6
• Proven in operation up to a pressure of
414bar (6000psi), subject to valve and
seat design
• Available in diameters from 1/2” (12mm)
to 77” (1950mm)
• Proven in operation from -50°C (-58°F)
to +176°C (+350°F), subject to valve
and seat design
• Available in billet form or as semifinished or fully machined valve seats
• Excellent ‘machineability’ allows
creation of desired surface finish
• Low moisture absorption level
enhances dimensional stability
•L
ower frictional losses than PEEK™
(trademark of Victrex plc) products
•E
xceptional resistance to wear and
abrasion
•S
ufficiently conformable to seal in low
pressure valve applications
•E
xcellent life performance in soft
valve seat application
• Superior dimensional stability over
PTFE in high pressure applications
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 Asia Pacific
Tel: +65 6777 9896
Fax: +65 6777 6102
Email:[email protected]
James Walker Deutschland
Tel: +49 (0)40 386 0810
Fax: +49 (0)40 389 3230
Email:[email protected]
James Walker Mfg (USA)
Tel: +1 708 754 4020
Fax: +1 708 754 4058
Email:[email protected]
James Walker Australia
Tel: +61 (0)2 9721 9500
Fax: +61 (0)2 9721 9580
Email:[email protected]
James Walker France
Tel: +33 (0)437 497 480
Fax: +33 (0)437 497 483
Email:[email protected]
James Walker New Zealand
Tel: +64 (0)9 272 1599
Fax: +64 (0)9 272 3061
Email:[email protected]
James Walker Benelux
(Belgium)
Tel: +32 3 820 7900
Fax: +32 3 828 5484
Email:[email protected]
(Netherlands)
Tel: +31 (0)186 633111
Fax: +31 (0)186 633110
Email:[email protected]
James Walker Iberica
Tel: +34 94 447 0099
Fax: +34 94 447 1077
Email:[email protected]
James Walker Norge
Tel: +47 22 706800
Fax: +47 22 706801
Email:[email protected]
James Walker Inmarco (India)
Tel: +91 (0)22 4080 8080
Fax: +91 (0)22 2859 6220
Email: [email protected]
James Walker Oil & Gas (USA)
Tel: +1 281 875 0002
Fax: +1 281 875 0188
Email:[email protected]
James Walker Brasil
Tel: +55 11 4392 7360
Fax: +55 11 4392 5976
Email:[email protected]
James Walker Ireland
Tel: +353 (0)21 432 3626
Fax: +353 (0)21 432 3623
Email:[email protected]
James Walker South Africa
Tel: +27 (0)31 304 0770
Fax: +27 (0)31 304 0791
Email:[email protected]
James Walker China
Tel: +86 21 6876 9351
Fax: +86 21 6876 9352
Email:[email protected]
James Walker Italiana
Tel: +39 02 257 8308
Fax: +39 02 263 00487
Email:[email protected]
James Walker UK
Tel: +44 (0)1270 536000
Fax: +44 (0)1270 536100
Email: [email protected]
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
Devol Engineering Ltd
Unit 2, Faulds Park Industrial Estate,
Faulds Park Road, Gourock
PA19 1FB
Tel: +44(0) 1475 657 360
Fax: +44(0) 1475 657 377
Email: [email protected]
2
BP4460 0313/1m
PIIL2893341
ISO
9001
Quality
Management
FM 09064
Registered office: Unit 2, Faulds Park Industrial Estate, Faulds Park Road, Gourock PA19 1FB Reg No.SC043459
© James Walker 2013