Condensed Catalog Featuring R410A Products Third Edition

Technical leaflet
Condensor Pressure Regulators, type KVR/NRD
Introduction
KVR condenser regulators can be mounted in
either the gas or liquid side of the condenser in
refrigeration and air conditioning systems.
They can also be used with valve types NRD
or KVD to assure that adequate pressure is
maintained on the receiver.
They are used to maintain a constant and
sufficiently high condensing pressure with
systems using air-cooled condensers.
Features
Metric conversions
1 psi = 0.07 bar
5
/ 9
(t 1
°F – 32) = t 2
°C
Accurate, adjustable pressure regulation
Wide capacity and operating range
Pulsation damping design
Stainless steel bellows
Compact angle design for easy installation
in any position
"Hermetic" brazed construction
1
/ 4
in. Schrader valve for pressure testing
Available with flare and ODF solder
connections
For use with CFC, HCFC and HFC refrigerants
Can be used as a relief valve from high
pressure to suction side
C US listed, file SA7200
Regulation range
n 70 to 250 psig
n Factory setting = 145 psig
Maximum working pressure
n KVR: PS (MWP) = 400 psig
n NRD: PS (MWP) = 400 psig
Maximum test pressure
n KVR: p' = 450 psig
n NRD: p' = 530 psig
Maximum temperature of medium
n KVR/NRD with Schrader: 275°F
n KVR without Schrader: 220˚F
Minimum temperature of medium –40°F
P band (full valve stroke)
n KVR 12 to 22: 90 psi
n KVR 28 to 35: 72.5 psi
Opening differential pressure for NRD
n Fully open: ∆p = 43 psi
© Danfoss Inc. 01-07 (USCO)
USCOC.PK.000.C1.22
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