เช็ควาล์ว Danfoss รุ่น NRV 19s
เช็ควาล์ว ยี่ห้อ Danfoss รุ่น NRV 19s
Type NRV (Straightway Solder ODF version)
Code number 020-1054
Connection : 7/8″
Kv value (m³/h) : 5.50
CHECK VALVE Types NRV and NRVH
NRV and NRVH can be used in liquid suction and hot gas lines in refrigeration and air conditioning plants.
The valves ensure the correct flow direction and prevent back-condensation from a warm part of the system to the cold evaporator.
The hermetic tight design of solder versions meet the environmental demands for today and future.
A built-in damping piston makes the valves suitable for installation in lines where pulsation can occur,
e. g. in the discharge line from the compressor.
• Ensure correct flow direction.
• Available in both straightway and angleway versions.
• Prevents back-condensation from warm to cold system part.
• Solder versions are compliant with ATEX hazard zone 2.
• Hermetic tight design for solder versions.
• Built-in damping piston that makes the valves suitable for installation in lines where pulsation can occur,
e.g. in the discharge line from the compressor.
• NRVH type check valve is with stronger spring and it‘s recommended to use for compressors in parallel
(i.e. power packs) where higher level of pulsation and vibration are expected.
• Oversize connections provide flexibility in use.
• Refrigerants :
R134a, R22/R407C, R404A/R507, R407A, R407F,R410A, R32, R290, R600, R600a,
R1270, R448A, R449A, R450A, R452A, R452B, R454B, R513A, R1234ze, R1234yf
• Media temperature range : -50 – 140 °C
• Max. working pressure (PS/MWP) : 46 bar / 667 psig