Air valve type VENTEX SR (without isolating system) - Standard version

Version with ¼" tapping and plug: consult us

Water flow in case of break main

Air flow large orifice

Standard Mounting with Concentric LUG Butterfly
Valve

Mounting with EURO 20 NG type 23

Air valve type VENTEX SR (without isolating system) - Standard version

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

The Ventex SR air valves are without shutter gasket.

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 Ventex SR air valves are without shutter gasket. They are less bulky and easier to handle. They therefore do not include isolating system.

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

In order to allow the maintenance, the air valves must be installed with a concentric butterfly valve Lug type or an isolating valve Euro 20 type between the network and the air valve.

Range

Air Valves Type VENTEX SR 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 SR 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.

Material and coating

Version with ¼" tapping and plug: consult us

Item

Designation

Material

10, 11

Body, Bonnet

FGS 400/15 coated epoxy 250 µ mini acc. EN 1563

2-1, 2-2, 2-3

Body-bonnet: bolts and washers

Zinc coated class 8-8 steel

3

Body-bonnet gasket

EPDM Rubber acc. EN681-1

4-1

Large orifice seat

NBR rubber encapsulated SG 400/15 ductile iron acc. EN 1563

4-2+4-3+4-4

Seat : bolts and washers

Zinc coated class 8-8 steel

5

Nozzle and nozzle control

Cu Zn 39 Pb2 bronze rod type acc. EN12164

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

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 (Concentric LUG Butterfly valve or Euro 20 NG type 23 with or without reducing flange): only for a repairing without water cut: operating system or shutter gasket insert gate valve

Standard Mounting with Concentric LUG Butterfly Valve

Mounting with EURO 20 NG type 23

Mounting with two air valves DN200: for pipes DN1400 up to DN1800: to realize according to sketch on a tee 3 equal socket and a special Blank flange

Related products :

- Concentric LUG butterfly valve

- Gate valve Type Euro 23for PFA10, 16 - Gate valve Type RVOM for PFA25

Solutions