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Steam Stop Valve, AVD Type


Technical Data

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

Nominal size:                 DN50 - DN600 / 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 ANSI / ASTM. For the main parts of our valves we use standard material as listed below or according to our customer specifications.


                                                


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

1.4571
X6CrNiMoTi17-12-2

1.4903
X10CrMoVNb9-1
A182 F91
1.4922
X20CrMoV12-1

1.5415
16Mo3
A182 F1
1.7335
13CrMo4-5
A182 F12
1.7380
10CrMo9-10
A182 F22
Steam Stop Valves (AVW Type)



Application

Steam Stop Valves of AVW type are applied for highest values of pressure, temperature and mass flow capacities. Steam control valves are used as pressure isolating valves in all types of the industry where piping has to be 100 % free of steam.


Design and Function

The valve body has horizontal inlet connections firmly welded, whereas the seat and the joined conical widening are removable. The valve stem with its plug as well as the cone are made in one piece. The stem is pivoted vibration-free between a bush in the valve cover and another bush in the valve seat. Cover and valve are fastened together by a clamping device which facilitates assembly.

The noise level is kept low by the special design of the 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 opens against the pressure of the medium. A complete seal in the closed position is secured.