All rights reserved by ARMATUREN UNION® GmbH. copyright 2013
Water Stop Valve, AVW Type


Technical Data

- Throttling plug for low differential pressure
- Single- and multi-stage trim
- customised
- acc. to DIN / EN Standard; other on request

Nominal size:                    DN50 - 600 / NPS 2" - 24", other on request

Pressure rating:                PN160 - 720 / Class 900 - 4500, other on request

Pressure difference:        all pressure differences, high pressure difference with multi-stage valve type

Characteristic:                   on - off; regulating on request

Flow direction:                  flow to close; flow to open on request

Design:                               forged steel-welding construction, angle-, globe-, z-type

Connections:                     welding ends, flanges

Actuators:                          manual, electric, pneumatic, hydraulic


Materials

All materials are according to DIN or ASTM. For the main parts of our valves we use standard material as listed below or according to customer specifications.




Material
No.
DIN
ASTM
1.0460
C22.8
A105
1.4541
X6CrNiTi18-10

1.4571
X6CrNiMoTi17-12-2

1.4922
X20CrMoV12-1

1.5415
16Mo3
A182 F1
1.6368
15NiCuMoNb5-6-4

1.7335                   
13CrMo4-5
A182 F12
Water Stop Valves (AVW Type)



Application

Water Stop Valves of AVW type presented here are suitable for use under conditions of highest pressures, temperatures and outputs. Water stop valves are used in all branches of industry where piping has to be 100 % sealed against high pressure differentials.


Design and Function

The valve body has a lateral inlet connection and is fitted with a seat welded in place which can be exchanged, and has a close fitting expansion cone. The valve stem and cone are made in one piece. The stem is mounted to be free from vibration and is guided in a bush in the valve cover and another bush in the valve core. Cover and valve are fastened together by a clamping device which facilitates assembly.

The noise level is kept low because of a special design of internal parts. The pulse from the control unit causes the valve drive to change position of valve cone. The gap between the seat and the cone allows the medium to flow. The valve can be opened against the pressure of the medium. A complete seal in the closed position is secured.