User Manual Q&AAnswer
Jan 16, 2025 - 05:44 AM
When designing the system for the Danfoss PAHT 256-308 PAHT G Pumps, there are a few important considerations to keep in mind.
1. Self-emptying of the pump during standstill should be avoided.
2. The inlet pressure of the pump must never exceed the outlet pressure. This is especially important in boosted or open-ended systems with direct water supply.
3. In open-ended systems with direct water supply, the inlet pressure for PAHT G 256/308 must be at least 2 barg (29 psig) and should not exceed 6 barg (87 psig) continuously. If the peak inlet pressure is unknown, a safety valve with a rating of 10 barg (145 psig) should be installed on the inlet side of the pump.
4. The preferred system design includes dimensioning the inlet line to minimize pressure loss, placing an inlet filter in front of the pump, using flexible hoses to minimize vibrations and noise, and installing a non-return valve after the outlet to avoid backspin of the pump.
5. It is also recommended to continuously monitor the filter clogging, pressure on the inlet and outlet sides of the pump, and temperature.
For more detailed information and guidance on system design, please refer to the pump instruction manual for the Danfoss PAHT G 256-308 PAHT G Pumps.
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