Spraywater Stop Valves (ASV Type)
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.
- Throttling plug for low differential pressure
- Single- or multi-stage trim
- acc. to DIN / EN Standard; other on request
|Nominal size||DN15 – 125 / NPS ½“ – 5″, other on request|
|Pressure rating||PN20 – 400 / Class 150 – 2500, other on request|
|Pressure difference||all pressure differences, high pressure difference|
|Characteristic||on – off; regulating on request|
|Flow direction||flow to close|
|Design||forged steel-welding construction, angle-, globe|
|Connections||welding ends, flanges|
|Actuators||manual, electric, pneumatic, hydraulic|
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.