Series TDL -Schroedahl Automatic Recirculation Valve
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R.F.Q
The SCHROEDAHL Automatic Recirculation Valve is a high quality automatic solution
to protect centrifugal pumps against overheating, instability, and cavitation during
zero process flow and low load conditions.
If the flow through the system is, or falls below a certain level, the bypass system
opens automatically and the fluid is recirculated, providing the required minimum
flow for the pump.
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TDL Automatic Recirculation Valve – video
The SCHROEDAHL Automatic Recirculation Valve Type TDL consists of the check valve section with bypass configuration.
The lever controls the position of the bushing, which in turn opens or closes the holes in the control head. The minimum flow is thereby bypassed in a modulating way. Applicable for differential pressures up to 40 bar. Standard with non-return function.
Operation
- The outlet main flow controls the check valve and positions it in proportion to the flow.
- The stem of the check valve transmits the motion via a lever to the bypass.
- The bypass system regulates the bypass flow in a modulating way and reduces the pressure to the bypass outlet pressure level without cavitation.
- The full minimum flow is bypassed when the main check valve is seated. The bypass is fully closed when the check valve is in its upper position, thereby
- allowing full pump flow to the system.
- The check valve moves upwards with increasing main flow and downwards with decreasing flow.
- The check valve transmits this motion via a lever to the bypass system and therefore controls the bypass flow in a modulating position.
Spesifikasi
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| Asal | DE |