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Spraywater Stop Valve, ASV Type


Technical Data

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
















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.











Nominal size
DN15 - 125 / NPS " - 5", other on request
Pressure rating
PN20 - 400 / Class 150 - 2500, 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
Design
forged steel-welding construction, angle-, globe-, z-type
Connections
welding ends, flanges
Actuators
manual, electric, pneumatic, hydraulic
Material
No.
DIN
ASTM
1.0460
C22.8
A105
1.4541
X6CrNiTi18-10

1.4571
X6CrNiMoTi17-12-2

1.5415       
16Mo3
A182 F1
Spraywater Stop Valves (ASV Type)



Application

Spraywater Stop Valves of ASV type isolate injection water in a controlled way to the connected fittings and/or coolers. The injection water serves as a hot-steam temperature control. In order to achieve a good adaptation for each application, the injection valves are available as single- or multi-stage type. However, they can be used as stop valves also for other media.


Design and Function

Normally the spraywater stop valve is designed as a single-stage valve type. In case of special applications, i.g. very high pressure differences, the valve is available as a multi-stage seat/cone version. The illustration below shows the design of a four-stage valve.

The stable and drop-forged design of the valve body, the wear-resistant construction of seat and cone, as well as the low-friction stem sealing which can be readjusted are features to be underlined. Together with the casing seal, also the stem seal consists of pure graphite. Body and seat seal form a static double sealing which is positioned in the line of the main power direction.

Valve cone and seat are ground-in sealed during manufacturing. During operation, these parts are protected against coarsely foreign particles by a perforated cylinder which is installed in the casing cover. In order to protect the unit against fine particles, it is recommended to install a particle separator upstream.