Air valve type VENTEX - SRI LANKA version

Air Flow output by large orifice in m3/h (with the
pressure of main: air flow = water flow) - Air Flow input by
large orifice in m3/h (with the pressure of main: air flow =
water flow)

Air valve type VENTEX - SRI LANKA version

RANGE / MARK ®
AIR VALVES
® VENTEX
PRODUCT FAMILY
PIPELINE PROTECTION
PIPELINE PROTECTION
Main features

The air valves protect the main:

The device evacuates great air amounts during the filling of the main:

- allows the inlet of great air amounts (in order to avoid a vacuum effect) during the emptying of the main

- evacuates small air amounts that are accumulated in the high points of the main during normal working conditions

The air valves are in conformance with EN 1074-4 and have a certificate of sanitary conformity.

Range

Air Valves Type VENTEX exist in a range stretching from DN50 to 200, for pressure PFA10, PFA16 and PFA25.

Fast choice of Ventex

Allows during the emptying of the main with a speed 1m/s

Main

DN ≤ 250

DN300-600

DN700-900

DN1000-1200

DN1200-1800

Air Valve

DN50, 60, 65

DN80,100

DN150

DN200

2 DN200

This Ventex choice allows, in case of break main, to limit maximal pressure drop 0,3 Bar for a flow rate with a part full gravity pipeline on a given slope: See paragraph Performances.

Dimensions and mass

Double air valve DN50-65

DN Air valveEFHh1asMass
mmmmmmmmmmmmkg
503902002581652015,325
65

390

200

258

165

20

15,3

24

Nozzle diameter

Working pressure (bar)

10

16

25

Diameter (mm)

2,2

1,7

1,4

Connecting flange: 65 type double air valve is fitted with an ISO PN10-16 or ISO PN25 DN60 rotatable flange

Other flanges available:

  • ISO PN10-16 or ISO PN25 rotatable DN65 flange
  • DN50 fixed flange.

Double air valve DN80/100/150/200

DN Air valveEFHh1asMass
mmmmmmmmmmmmkg

80-100

467

244

300

215

20

15,3

40

150

656

405

492

285

24

18,5

115

200

737

448

580

330

29

20,7

170

Nozzle diameter

Working pressure (bar)

10

16

25

Diameter (mm)

3

2.4

1,9

Connecting flange: DN80, 100, 150, 200 types double air valves are fitted with rotatable flanges

  • DN80, 100, 150, ISO PN10-16 for 80 100 150 types
  • DN200 ISO PN10 or DN200 ISO PN16 for 200 type
  • DN80, 100, 150, 200, ISO PN25 for all types.

Material and coating

Item

Designation

Material

10, 11, 12, 13, 14, 15, 16, 17

Body, Bonnet , Fixing Flanges, Shutter

FGS 400/15 coated epoxy 250 µ mini

1-1

Operating stem

Stainless steel Z20 C13 type

1-2

Operating nut

Cu Zn 39 Pb2 bronze type

1-3

Locked wash

Polyamide type 6-6

2-1 ; 2-2 , 2-3

Body-bonnet: bolts and washers

Stainless steel A4

3

Body-bonnet gasket

EPDM Rubber

4-1

Large orifice seat

NBR rubber encapsulated SG 400/15 ductile iron

4-2+4-3+4-4

Seat : bolts and washers

Stainless steel A4

5

Nozzle and nozzle control

Cu Zn 39 Pb2 bronze rod type

6-1 and 6-2

Float balls

EPDM rubber encapsulated Core in steel DC03 or DC04 to EN 10130 and DD11 or DD13 to EN 10111 steel type

7

Shutter gasket

EPDM Rubber

8

Ring VAN O FRA

EPDM Rubber G 7005

9

V Ring

NBR Rubber

18

Operating system bolts and washers

Stainless steel class A4

19

Stainless steel class A4

20

Operating square (or hand wheel)

FGS 400/15 Galvanized

21

Baffle

Stainless Steel Z6 CN 18-8 type

22

Baffle cover

Stainless Steel Z6 CN 18-8 type

Performances

Water flow in case of break main

Examples of Use: for a main DN600 laid inclined 4mm/m flow water around 1800 m3/h , flow which will not create a depression higher than 0,3b according to graph air flow large orifice below

Air flow large orifice

Air Flow output by large orifice in m3/h (with the pressure of main: air flow = water flow) - Air Flow input by large orifice in m3/h (with the pressure of main: air flow = water flow)

Nozzle air flow

Constant Flow from 1 bar (10MCE)

PFA in Bar

10

16

25

DN in mm

50-65

80-200

50-65

80-200

50-65

80-200

Ø nozzle in mm

2,2

3

1,7

2,4

1,4

1,9

Flow in m3/h

2,7

5

1,6

3,2

1,1

2

Hydraulic

Small and large Float balls: External leakage

No leakage in low pressure from 0,3 bars

Marking

The marking of the valves manufactured by Saint-Gobain refers to the EN 1074-2 and EN 19 international standards.

Markings are either integral markings, cast in the body, or markings made on plates, securely fixed to the body, in accordance with the EN 19 standard specifications.

EN 19 Specifications

Saint-Gobain valves process

Table 1 – Valve markings

Requirements

1

DN

EN 19 § 4.2.1

Mandatory markings

Shall be integral markings or on a marking plate

Integral

2

PN

Integral

3

Material

Integral

4

Manufacturer's name or trademark

Plate

11

Reference to Standard

EN 19 § 4.3

Supplementary markings

Items 7 to 21 in Table 1 are optional

Plate

12

Melt identification

Integral

16

Quality test

Printed on body

18

Manufacturing date

Plate

21

Closing direction

Plate + sticker on body

Installation

Mounting with gate valve: only for a repairing without water cut: operating system or shutter gasket insert gate valve

Solutions