2
Model 795 Vacuum breaker safety valve The valve acts as an automatic regulator of pressure drops and prevents the creation of a vacuum inside pressurised installations or vessels. In compliance with the ATEX 94/9/CE directive “Protective equipment and systems for use in potentially explosive atmospheres”. Specifications aActivated by direct action helicoid spring. aSimplicity of construction ensuring minimum maintenance. . aInternal body designed to offer favourable flow profile. aSoft seals giving greater tightness then that required by EN 12266-1, as long as the valve, in non operating conditions, is under —aequal or greater pressure than atmospheric pressure. aGreat discharge capacity. aAll the valves are supplied sealed at the set depressurising re- —aquested, simulating operational conditions, and are vigorously tes- —ated. aAll components are numbered, registered and checked. If re- —aquested in advance, material, casting, test and efficiency certi- —aficates will be enclosed with the valve. N°. PIECE PIECE MATERIAL BRASS STAINLESS STEEL 01 02 03 04 05 06, 8 07 09 10 11 12 13 Body Spring press Spring Shaft Plug Washer Seal Nut Sealing wire Charactetistic plate Seal Deflector Brass (EN-CW617N) Brass (EN-CW617N) Stainless steel (EN-1.4310) Stainless steel (EN-1.4305) Brass (EN-CW617N) Stainless steel (EN-1.4401) Fluorelastomer (Vitón) (2) Silicone's rubber (3) Stainless steel (EN-1.4401) Sealing wire Aluminium Plastic Stainless steel (EN-1.4401) Stainless steel (EN-1.4401) Stainless steel (EN-1.4305) Stainless steel (EN-1.4310) Stainless steel (EN-1.4305) Stainless steel (EN-1.4401) Stainless steel (EN-1.4401) Fluorelastomer (Vitón) (2) Silicone's rubber (3) Stainless steel (EN-1.4401) Sealing wire Aluminium Plastic Stainless steel (EN-1.4401) DN PN PRESSURE IN bar MAXIMUM TEMP. IN °C (1) MINIMUM TEMP. IN °C OPERATING CONDITIONS (1) For temperatures upper 150°C special seal. For temperatures upper 300°C special seal and spring. (2) Recommended temperature field -30°C to + 150°C. Maximum pressure of service 12 bar. (3) Recommended temperature field -50°C to + 115°C. Maximum pressure of service 9 bar. 3/8" to 1" 16 -50 16 120 12 150 16 -50 16 120 12 150 1 2 IMPORTANT 1.- Fluorelastomer (Vitón) seals or Silicone's rubber, achieving leakage levels less than . 1.- as long as the valve, in non operating conditions, is under equal or greater pressure than atmos- 1.- pheric pressure. Depending on demand: 1.- Buna-nitryls seals, Butyl, Natural rubber, E.P.D.M., Chlorosulphonate polyethylene (Hypalon), 1.- Neoprene, ...etc. 2.- The intake deflector prevents the entry of foreign bodies in the valve which will affect later 2.- operation. (Specially designed for moving transport). 3.- Possibility of manufacture in other types of material, for use in special working conditions (high 3.- temperatures, fluids,... etc.). 0,3 x 10 -3 Pa cm 3 sec.

Vacuum breaker safety valve - Amazon S3 · 2016-11-23 · Model 795 Vacuum breaker safety valve The valve acts as an automatic regulator of pressure drops and prevents the creation

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Page 1: Vacuum breaker safety valve - Amazon S3 · 2016-11-23 · Model 795 Vacuum breaker safety valve The valve acts as an automatic regulator of pressure drops and prevents the creation

Model 795

Vacuum breaker safety valve

The valve acts as an automatic regulator of pressure drops and preventsthe creation of a vacuum inside pressurised installations or vessels.In compliance with the ATEX 94/9/CE directive “Protective equipment andsystems for use in potentially explosive atmospheres”.

Specifications—aActivated by direct action helicoid spring.

—aSimplicity of construction ensuring minimum maintenance. .

—aInternal body designed to offer favourable flow profile.

—aSoft seals giving greater tightness then that required by EN 12266-1, as long as the valve, in non operating conditions, is under—aequal or greater pressure than atmospheric pressure.

—aGreat discharge capacity.

—aAll the valves are supplied sealed at the set depressurising re-—aquested, simulating operational conditions, and are vigorously tes-—ated.

—aAll components are numbered, registered and checked. If re-—aquested in advance, material, casting, test and efficiency certi-—aficates will be enclosed with the valve.

N°. PIECE PIECEMATERIAL

BRASS STAINLESS STEEL

01

02

03

04

05

06, 8

07

09

10

11

12

13

Body

Spring press

Spring

Shaft

Plug

Washer

Seal

Nut

Sealing wire

Charactetistic plate

Seal

Deflector

Brass (EN-CW617N)

Brass (EN-CW617N)

Stainless steel (EN-1.4310)

Stainless steel (EN-1.4305)

Brass (EN-CW617N)

Stainless steel (EN-1.4401)

Fluorelastomer (Vitón) (2)

Silicone's rubber (3)

Stainless steel (EN-1.4401)

Sealing wire

Aluminium

Plastic

Stainless steel (EN-1.4401)

Stainless steel (EN-1.4401)

Stainless steel (EN-1.4305)

Stainless steel (EN-1.4310)

Stainless steel (EN-1.4305)

Stainless steel (EN-1.4401)

Stainless steel (EN-1.4401)

Fluorelastomer (Vitón) (2)

Silicone's rubber (3)

Stainless steel (EN-1.4401)

Sealing wire

Aluminium

Plastic

Stainless steel (EN-1.4401)

DN

PN

PRESSURE IN bar

MAXIMUM TEMP. IN °C (1)

MINIMUM TEMP. IN °C

OPERATINGCONDITIONS

(1) For temperatures upper 150°C special seal. For temperatures upper 300°C special seal and spring.(2) Recommended temperature field -30°C to + 150°C. Maximum pressure of service 12 bar.(3) Recommended temperature field -50°C to + 115°C. Maximum pressure of service 9 bar.

3/8" to 1"

16

-50

16

120

12

150

16

-50

16

120

12

150

1

2

IMPORTANT

1.- Fluorelastomer (Vitón) seals or Silicone's rubber, achieving leakage levels less than .

1.- as long as the valve, in non operating conditions, is under equal or greater pressure than atmos-1.- pheric pressure.Depending on demand:

1.- Buna-nitryls seals, Butyl, Natural rubber, E.P.D.M., Chlorosulphonate polyethylene (Hypalon),1.- Neoprene, ...etc.

2.- The intake deflector prevents the entry of foreign bodies in the valve which will affect later2.- operation. (Specially designed for moving transport).

3.- Possibility of manufacture in other types of material, for use in special working conditions (high3.- temperatures, fluids,... etc.).

0,3 x 10-3 Pa cm3

sec.

Page 2: Vacuum breaker safety valve - Amazon S3 · 2016-11-23 · Model 795 Vacuum breaker safety valve The valve acts as an automatic regulator of pressure drops and prevents the creation

AIR

5

pd [bar]

0 0,1 0,2 0,3 0,4 0,5 0,6 0,7

1"

pd = Relative set depressurising [bar].

10

15

20

25

30

35[Nm3/h]

3/4"

1/2"

3/8"

• Stainless steel (EN-1.4401).

CONNECTIONS

d0

H

A

B

D

S

R

20,00

275,68

105

24,00

9,50

65

40 (41) •

0,78

0,80

5101

5102

Whitworth gas-tight cylindrical male thread ISO 228/1 1978 (DIN-259)

3/8" 1/2" 3/4" 1"

16,50

180,64

90

21,00

8,00

65

35 (36) •

0,46

0,51

5341

5342

12,50

89,53

81

16,50

5,50

65

32

0,36

0,34

5021

5022

9,50

51,25

64

13,00

4,25

40

24

A0 = (d02 - d1

2)π4

BRASS

STAINLESS STEEL

BRASS2002-795.

STAINLESS STEEL2002-795.

0,15

0,19

5381

5382

R

3/8"

1/2"

3/4"

1"

64

81

90

105

A

13,00

16,50

21,00

24,00

C

51,00

64,50

69,00

81,00

L

09

12

15

18

E

13,90

17,80

22,00

27,50

F

20,00

25,50

34,00

42,00

D

40

65

65

65

K

063

080

095

106

G

24

32

40

50

J

12,00

15,50

20,00

25,00

H

Example of installation

R

0,40

0,05

56199

56200

56201

56202

20,00

7,20

0,36

3/8" 1/2" 3/4" 1"

0,40

0,05

56195

56196

56197

56198

16,50

5,94

0,36

0,40

0,05

56191

56192

56193

56194

12,50

4,50

0,36

0,40

0,05

56187

56188

56189

56190

9,50

3,42

0,36

MAXIMUM

MINIMUM

CODE

CODE

CODE

CODE

0,05 to 0,10

0,09 to 0,20

0,19 to 0,30

0,29 to 0,40

SETDEPRESSURISINGIN bar

AIR

2,5

10

OVERDEPRESSURE FACTORS

Overdepressure in %

Multiply the absortion capacityobtained from the graphic, bythe correction factor, in orderto obtain the absortioncapacity at requiredoverdepressure.

% Δ pd

15 20 25 30 35 40

2,0

1,5

1,0

α d

AIR0,20

0,15

0,10

pd [bar]

0 0,1 0,2 0,3 0,4 0,5 0,6 0,7

1/2"3/4"3/8"1"

pd = Relative set depressurising [bar].

d0

h

h/d0

Informative brochure, without obligation and subject to our General Sales Conditions.

89136/14

Founded in 1914

www.vycindustrial.comAvenc del Daví, 22 Pol. Ind. Can Petit 08227 TERRASSA (Barcelona) SPAIN +34 93 735 76 90 +34 93 735 81 35 119 [email protected]