Schroedahl Type BPV Back Pressure Regulator
Product Features
- Prevents evaporation and cavitation and ensures smooth operation
- Forged housing material, carbon steel or stainless steel
- Special material possible
- Internal operation (no external energy source required)
- Easy to install
- Low maintenance
Application
- Maintaining the pressure in the fl ow recirculation or return line to the tank
Nominal Diameter: DN 25-300 / NPS 1-12
Pressure Class: PN 16-400 / Class 150-2500
Product Features
- Prevents evaporation and cavitation and ensures smooth operation
- Forged housing material, carbon steel or stainless steel
- Special material possible
- Internal operation (no external energy source required)
- Easy to install
- Low maintenance
Application
- Maintaining the pressure in the fl ow recirculation or return line to the tank
Technical Data
| Nominal diameter | DN 25 – 300 / NPS 1 - 12 |
| Pressure class | PN 16–400 / Class 150 – 2500 |
| Temperature (max.) |
Up to 230 °C / 446 °F (other temperatures on request) |
| Housing material | 1.0460 / A105 1.0571 / LF2 1.4404 / F316L 1.4501 / F55 |
| Housing type | Forged |
| Media | Liquids of all kinds (water, oils, chemicals and others) |
| Flanges | EN 1092-1, ASME B16.5, ISO 7005, JIS, JPI, welding ends of request |
| Designs | As intermediate flange version (Z version) or with integrated flanges (K version) |
| Number of stages (max.) | 1 |
| Number of controlled stages (max.) | 1 |
| Operating range (max.) | Delta p up to max. 10 bar |
Function
Even the optimal and sophisticated pressure reduc tion of the SCHROEDAHL automatic recirculation valves and control valves set extreme conditions limits in some installations.
SCHROEDAHL back pressure regulators type BPV are used in such cases.
They increase the distance to the evaporation pressure of the medium by generating a defined pressure difference. This prevents unwanted evaporation and cavitation and ensures smooth and gentle operation.
Careful adjustment of the operating parameters between minimum fl ow or control and back pressure valves ensures optimum system operation.
The pressure difference at the back pressure valve as specified in the design shifts the bushing (item 204) in the direction of flow against the pressure spring (item 237). This releases the throttle cross sections at the bushing until the specified pressure difference is attained.
