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Intermediate discharge valves (IDVs) increase
seasonal efficiency
Heat shield lowers the heat transfer between
discharge and suction gas and the sound level
Integrated discharge gas temperature protection
(DGT)
Internal Non Return Valve (INRV) prevents
excessive leak rate from high pressure side
Lead free polymer bearings improve behavior
under poor lubrication conditions
Patented motor cap for optimal motor cooling
Patented gas path flow with gas intake design
induce higher resistance to liquid slugging
Organ pipe masters oil circulation in manifold
configuration.
Cut away DSF 270-530
Figure 2: Cut Away DSF 270-530
How do IDVs work?
Figure 3: Intermediate Discharge Valve (IDV)
Danfoss Intermediate Discharge Valves (IDVs) are located close to the discharge side of the compressor. They reduce
excessive compression of refrigerant under part-load conditions while maintaining the same cooling capacity. The
IDVs open when discharge pressure falls below the built-in optimization point. They adapt the effort of the motor to
the varying load and pressure conditions in the system, thus reducing the effort of the motor and its electrical
consumption and improving the system’s seasonal energy efficiency.
© Danfoss | Climate Solutions | 2023.06
AB309735209512en-000603 | 7
Scroll compressors, DSF090 to DSF530 | Introduction
