Industrial Valves
SCHROEDAHL TDL
“Medium pressure, high bypass flow”
The TDL is a compact, high-capacity ARV designed for larger centrifugal pumps requiring high bypass flow at moderate pressures. It combines pump protection, check valve, and bypass control in a single unit and is optimized for flexibility and compact installation. Compared to SUL, the TDL offers higher bypass flow and larger sizes, making it suitable for critical industrial and power applications.
Key Features:
- Flow-sensitive, modulating bypass
- Compact forged or cast design
- High bypass flow capability
- Integrated check valve
- Low hysteresis → stable pump operation
- Optional manual start-up and degassing connections
Technical specifications:
Nominal diameter
DN 25–500 / NPS 1–20
Pressure class
PN 10–160 / Class 150–900
Temperature (max.)
Up to 230 °C / 446 °F (other temperatures on request)
Housing material
1.0460 / A105,1.0571 / LF2,1.4404 / F316L,1.4462 / F51.1.4501 / F55
Housing type
Forged or cast
Media
Liquids of all kinds (water, oils, chemicals, and others)
Flanges
EN 1092-1, ASME B16.5, ISO 7005, JIS, JPI,welding ends on request
Designs
Vertical installation, horizontal installation, manual start-up, enlarged nominal width of the bypass, degassing connection
Number of stages (max.)
1
Number of controlled stages (max.)
1
Operating range (max.)
Delta up to max. 40 bar
Other
Bypass differential pressure up to 40 bar