Presentation Seals AVV 2012

7/24/2019 Presentation Seals AVV 2012

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ADDEDVAL

UEFO

RVALVE

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AVV Added Value for Valvesestablished in 2009 as a supplier ofcomponents for ball valves for petrochemical, oil and gas applications.

Our commitment is to provide our clients with high quality products, at a

competitive price within acceptable lead times.

We specialize in in-house manufacturing of seats, to ensure control is

maintained throughout the production process, delivering best quality

products that perform in service.

We offer an extensive range of sealing solutions and materials, to meet most

customer requirements.

The company is headquartered in Italy, in Grumello del Monte, Bergamo.

P

resentation


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Product

s

Dimensional Range

AVV offers an extensive products range in sizes 1/2 through 36.

DN seat ball

DN _int e_st H_st _b H_b

inches mm mm mm mm mm

" 13 30 25 25 20

" 19 40 25 40 30

1 " 25 42 30 45 35

1 " 38 65 55 65 40

2 " 49 80 55 80 50

2 " 62 90 55 110 75

3 " 7 4 110 55 133 107

4 " 100 145 63 169 136

6 " 152 208 70 242 184

8 " 201 265 70 320 238

10 " 252 320 70 395 296

12 " 303 380 82 465 358

14 " 334 415 82 515 392

16 " 385 470 82 590 480

18 " 436 528 82 660 560

20 " 487 580 85 740 552

22 " 538 635 85 815 618

24 " 589 682 85 890 700

26 " 633 730 100 952 770

28 " 684 800 100 1025 820

30 " 735 855 100 1105 900

32 " 779 894 100 1180 960

34 " 830 954 100 1246 1040

36 " 874 990 100 1308 1060

H_b

H_st

_int

_est

_b


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SE

Seat combining two seal-

ing elements: a thermo-

plastic and an elastomeric

insert. This way the elasto-

meric ring is protected by

the thermoplastic insert and

both work for the sealing, in

low and high pressure, untilclass 1500.


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SD

Seat with an elastomeric

delta ring insert. Theelastomeric element ensures

the sealing in low pressure as

in high pressure, until class

900. Delta shape prevents

the insert extrusion during

ball rotation. The delta ring is

maintained in position by an

elastic ring out of stainless

steel.

Product

s

Front sealing

We can provide an extensive choice ofsealing solutions to satisfy all customers

requests.

ST

Its a seat with a thermo-plastic ring insert. The in-

sert assures the tightness

on the ball. The plastic ring

is inserted in the steel with

interference (determined ac-

cording to the materials) to

prevent the extrusion of the

insert during the rotation ofthe ball.

SM

Metal to metal seat, where

the sealing is obtained by

the contact of seat and

ball metal surfaces, coated

with Tungsten or Chromecarbide, finely lapped and

matched together. Typically

used in potentially erosive or

abrasive service caused by

dirt or particles in the media

(fluid) or when the valve is

exposed to very high tem-

perature.Two main designs for this

type of sealing can be pro-

duced:

1) Strong type: a solid seat,

pushed against a strong ma-

terial ball.

2) Flexible type: a more flex-

ible seat design, slightly

adapting to the ball.


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O-RING

Toroidal section rings out of

elastomeric material, closing

escape paths, while beingcompressed and deformed

inside the provided groove.

Thanks to its elastic properties

the o-ring can exert pressure

on the wall of the system

components, producing the

sealing.

GRAPHITE

Component preventing both

internal and external valveleakage in valves heated in

a fire application, when fire

could damage non metal

materials, such as thermo-

plastic rings and o-rings.

Available both in thread

shape or moulded rings.


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Product

s

Radial sealing

Back seat side is a sensitive point in the valve. Seats can be fitted on demandwith radial sealing components, to be chosen depending on temperature,

pressure and media applied.

LIP SEAL

High performance sealing

specific for extreme

applications: cryogenic,

aggressive media, high

temperature. Tolerances and

roughness to be granted for

high performance.

SPRINGS

Component fitted in to the

back seat or directly in tothe valve body to ensure

tightness at extremely low

differential pressure. Out

of AISI 302 for standard

applications, or Inconel 750,

for aggressive media and

extreme temperature.

BACK-UP RING

Thermoplastic ring out of

PTFE or PEEK, conceived

to avoid o-ring extrusion,

especially in high pressure

conditions. Improving o-ring

function and ensuring its

long-life.


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Materials

AVV can supply any material, in accordance with a specific application.

Thanks to our technical know-how and continuous research we are ready to

recommend the best material combination for any working condition.

All metallurgical compositions are sourced thoroughly in compliance with the

customer request and managed in-house. Depending on the size seats areobtained from bars, hollow bars, pre-shaped rings or raw rings.

Both forged, laminated and casted centrifuged materials can be used in

accordance with the users specification. Additional requirements, such as

extra tests, ultrasonic test, 3.2 certificate to be performed on demand.

TRADENAME UNS Werkstof BARSTOCK FORGING CASTING

Carbon Steel K30504 1.0402 C22 A105 A216 WCB

Low temperature carbon steel K03011 1.0508 A350 LF2 A350 LF2 A352 LCB

High Yield steel K03014 A694 F60 A694 F60

13 Chrome S41000 A479 410 A182 F6A A351 CA15

17-4PH S17400 1.4542 A564 630 A564 630

254 Smo S31254 1.4547 A182 F44 A182 F44 A351 CK3MCuN

304 S30400 1.4301 A479 304 A182 F304 A351 CF8316 S31600 1.4401 / 1.4436 A479 316 A182 F316 A351 CF8M

316L S31603 1.4404 A479 316 L A182 F316 L A351 CF3M

316Ti S31635 1.4571 A479 316 Ti A182 F316 Ti

Duplex 4462 S31803 1.4462 A479 S31803 A182 F51 A890 Gr 4A

Monel 400 N04400 2.4360 B164 N04400 B564 N04400 A494 M35-1

Incoloy 825 N08825 2.4858 B425 N08825 B564 N08825

Inconel 625 N06625 2.4856 B446 N06625 B564 N06625 A494 CW6MC

SAF 2507 S32750 1.4469 A479 S32750 A182 F53 A890 Gr 6A

Titanium Gr.1 R50250 3.7025 B348 GR.1 B381 F1 B367 C1

Zeron 100 S32760 1.4501 A479 S32760 A182 F55 A351 GR CD3MWCuN

Steel


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-300

-200

-100

0

100

200

300

Devlon

Nylon1

2

Nylon

6

Nylon6+

30%G

F

Nylon6+

MoS2

PCTFE

Peek

Peek

+graphite30

%

Peek

+PTFE

PTFE

PTFE

+MoS

2

Temperature Range(con0nuosly)

Materials

Thermoplastics

The thermoplastic material is extensively used for the front sealing.Thermoplastics can be selected among a wide range of materials, to

match the chemical and mechanical properties with the specific working

environment of the valve.

Thermoplastic insert is pressed by interference into the provided groove and

finished according to the customer design by a dedicated tool, to ensure thebest roughness.

0

2000

4000

6000

8000

-100 -50 0 50 100 150 200 250

Temperature C

S-ffness vs

Temperature

Nylon 6

Nylon 6 +

30% FG

PTFE

Modulusofelasti

city(Gpa)


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Materia

ls

Elastomers

An extensive selection of elastomers can be supplied depending on differentservice conditions, considering working temperature, pressure, rate of flow,

chemical composition of the fluid and type of valve action.

Available materials are listed below.

material std

Viton green

Viton GLT blue

Viton AED green yellow

Viton GLT-AED blue yellow

Therban red

Therban AED red yellow


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Treatme

nts

Nickel Plating

Electroless Nickel Plating is a surface treatment assuring high resistance tocorrosion, wear and friction. It is specifically suitable to enhance the life of

components exposed to severe working conditions.

Different thickness of the Nickel layer can be obtained depending on the

service environment: 30 50 80 m, with a standard superficial hardness

of 500-600 HV. On demand hardness can be increased up to 1000 HVperforming additional heat treatment.

Tungsten and Chrome carbide coating are provided to increase wear and

abrasion resistance, to make seats and ball suitable to perform in aggressive

environments, where corrosion, abrasion, high pressure and temperature are

combined. Different carbide thickness can be obtained on demand.

In case of seats and ball with Tungsten or Chrome carbide coating, AVV can

offer the complete metal to metal kit, including matching of the components,

so to provide a checked package ready to be assembled into the valve.

Tungsten and Chrome Carbide

coang temperature limit (C) applicaon

Electroless Nickel (ENP) 220 general purpose

Chrome Carbide >400 high temperature, steam, condensate water, refning

Tungsten Carbide 240 moderate temperature, powder, abrasive media


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Quality

Certification

All products are designed, manufactured, inspected and assembled inaccordance to industry standard.

Quality is achieved through strict compliance to our Quality Management

System under ISO 9001:2008 Certification, that defines all operating

procedures.


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ADDEDVALUE FORVALVES

Added Value for Valves srl

Via dei Videtti, 2

24064 Grumello del Monte (BG) Italy

Ph. 0039 035 835991

Fax 0039 035 4132980

[email protected] - www.avvalves.it

Presentation Seals AVV 2012

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