Schroedahl Type AK High Pressure Control Valve with Axial Throttle Body
Product Features
- Cavitation-free, low-noise, multi-stage throttle body in a cascade design with axial flow direction under high pressure
- Identical procedural characteristic or according to valve sizing
- Screwed-on housing cover
- Designed for extreme high pressure control and to avoid cavitation damage and to be suitable for a wide range of applications
- The multi stage throttle body is designed as a cascade with an axial fl ow direction permits an extremely wide application range of up to 50:1 at constant high pressure loss without cavitation problems
Applications
- High-pressure control, high-pressure injection for power plant and process technology applications
Nominal Diameter: DN 15-100 / NPS 1/2-4
Pressure Class: PN 16-640 / Class 150-2500
Product Features
- Cavitation-free, low-noise, multi-stage throttle body in a cascade design with axial flow direction under high pressure
- Identical procedural characteristic or according to valve sizing
- Screwed-on housing cover
- Designed for extreme high pressure control and to avoid cavitation damage and to be suitable for a wide range of applications
- The multi stage throttle body is designed as a cascade with an axial flow direction permits an extremely wide application range of up to 50:1 at constant high pressure loss without cavitation problems
Applications
- High-pressure control, high-pressure injection for power plant and process technology applications
Technical Data
| Nominal diameter | DN 15–100 / NPS 1/2-4 |
| Pressure class | PN 16–640 / Class 150 – 2500 |
| Temperature (max.) |
Up to 280°C / 536°F |
| Housing material |
1.0460 / A105 |
| Housing type | Forged |
| Media | Water |
| Flanges | EN 1092-1, ASME B16.5, ISO 7005, JIS, JPI, welding ends of request |
| Designs | Angle Type, Globe Type |
| Actuators | Pneumatic, Electric, Hydraulic |
| Number of stages (max.) | 6 |
| Number of controlled stages (max.) | 6 |
| Operating range (max.) | 1:50 |
Function
The AK series pressure reducing control valves enable reliable controllability even with high pressure differences and with the necessary broad rangeability. The multi-stage design of the throttle body makes possible the reduction of even very high pressures with low wear.
The AK series is characterised by the special design of the valve plug. These are designed with milled chambers on the cylindrical body that are specially tailored to the respective application. This means that even very small Kv values can be reliably controlled. The special arrangement of the chambers on the throttle unit also results in the fl ow being defl ected, which reduces speed and further minimizes resulting wear. This ensures that the valve operates reliably over a long period of time.
Optional perforated throttle plates can be used to reduce noise and homogenise fl ow ensuring that the control valve operates quietly under all conditions. The parts of the throttle body are perfectly matched to each other so that best sealing properties are guaranteed even without the use of additional elastomers.
On moving away from the closed position the chambers create an opening for the process medium. As the stroke increases, more medium can flow through the chambers axially over the valve plug. Stringing together several chambers one behind the other allows the pressure to be brought to the required level in several stages.
