The check valve (non-return valve, one-way valve) allows the refrigerant to pass in one direction only and automatically stops reverse flow. It is used with parallel evaporators and compressors, and in heat pump and hot gas defrost circuits.
This category contains Danfoss NRV and NRVH, Sanhua YCVS series and copper-body check valves.
When Choosing
- Connection: Flare or ODF solder; the size is selected according to the tube outside diameter.
- Body type: Straight-through or angle (L) type, depending on the layout of the line.
- Opening pressure: Standard models open at a low pressure difference; strong-spring models such as the Danfoss NRVH open at a higher difference.
- Flow direction: The arrow on the body shows the direction in which the flow will pass.
Brand: Danfoss
Model: 19.70.011
Designed to ensure that the refrigerant flows in one direction in refrigeration systems, the Danfoss 020B1011 NRV 10S Straight Solder Check Valve prevents refrigerant backflow with its 3/8" solder connection and straight body design. With its brass body and copper connection ends, it is easily braze..
$16.54
Ex Tax:$13.78
-250x250.jpg "Danfoss 020B1010 NRV 6s v2 Check Valve – 1/4\" ODF Solder, Straightway, Kv 0.67, 49 bar")
Brand: Danfoss
Model: 19.70.008
Danfoss 020B1010 (type NRV 6s v2) is a straightway check valve that allows flow in the refrigeration line to pass in one direction only. It has a 1/4" ODF solder connection. Former order code: 020-1010.
Closes Reverse Flow — Prevents Refrigerant Migration to the Compressor During Standstill
When the..
$14.15
Ex Tax:$11.79
new
Brand: OEM
Model: 01 58 20
The copper-body 1/2" (12.7 mm) check valve is a one-way valve (check valve) that allows refrigerant to pass in one direction only in refrigeration and air conditioning installations and automatically shuts off reverse flow. Both ends have 1/2" ODF solder connections and are brazed directly to the tu..
$8.12
Ex Tax:$6.77
new
Brand: OEM
Model: 01 58 22
The copper-body 3/4" (19.05 mm) check valve is a one-way valve (check valve) that lets refrigerant pass in one direction only in refrigeration and air conditioning systems and automatically stops reverse flow. Both ends have 3/4" ODF solder connections and are brazed directly to the pipe. The arrow ..
$10.56
Ex Tax:$8.80
new
Brand: OEM
Model: 01 58 19
The copper-body 3/8" (9.52 mm) check valve is a one-way valve (check valve) that allows refrigerant to pass in one direction only in refrigeration and air conditioning installations and automatically shuts off reverse flow. Both ends have 3/8" ODF solder connections and are brazed directly to the tu..
$6.91
Ex Tax:$5.76
new
Brand: OEM
Model: 01 58 21
The copper-body 5/8" (15.88 mm) check valve is a one-way valve (check valve) that allows refrigerant to pass in one direction only in refrigeration and air conditioning installations and automatically shuts off reverse flow. Both ends have 5/8" ODF solder connections and are brazed directly to the t..
$8.54
Ex Tax:$7.11
new
Brand: OEM
Model: 01 58 23
The copper-body 7/8" (22.22 mm) check valve is a one-way valve (check valve) that lets refrigerant pass in one direction only in refrigeration and air conditioning systems and automatically stops reverse flow. Both ends have 7/8" ODF solder connections and are brazed directly to the pipe. The arrow ..
$19.33
Ex Tax:$16.11
Brand: Danfoss
Model: 19.70.080
Danfoss NRV 22S (020-1020) is a high-quality check valve with an angleway design; with its 7/8 inch (22 mm) ODF solder connection size, it ensures that flow in refrigeration systems occurs in one direction only. With a maximum working pressure of 46 bar and its piston-type design, it offers a safe, ..
$41.09
Ex Tax:$34.25
Brand: Danfoss
Model: 19.70.100
Danfoss NRV 28S (020-1021) is a check valve designed with an angleway configuration and a 1 1/8 inch (ODF) solder connection. Providing one-way flow control, this valve is equipped with a high-safety piston-type internal design and withstands pressures up to 46 bar. With its angle form, which allows..
$87.13
Ex Tax:$72.61
Brand: Danfoss
Model: 19.70.120
The Danfoss NRV 35S (020-1026) angleway solder check valve, with its 1 3/8 inch ODF solder connection, ensures that flow occurs in one direction only in high-volume refrigeration systems. With its piston-type internal design and angled form, it offers a space advantage in compact systems. With a max..
$104.18
Ex Tax:$86.82
Brand: Danfoss
Model: 19.70.090
Danfoss NRV 22S (020-1060) is a high-performance check valve with a 1 1/8 inch ODF solder connection and an angleway design. It withstands a maximum working pressure of 46 bar and increases system safety by providing one-way flow. Its piston-type internal design offers long-lasting, leak-tight perfo..
$57.52
Ex Tax:$47.94
Brand: Danfoss
Model: 19.70.130
Danfoss NRV 35S (020-1061) is an angleway one-way check valve designed for high-flow, high-pressure systems. Offered with a 1 5/8 inch (41 mm) ODF solder connection, this model provides safe use in large-capacity refrigeration systems with a Kv value of 29 m³/h and a maximum working pressure of 46 b..
$104.18
Ex Tax:$86.82
Brand: Danfoss
Model: 19.70.034
Danfoss NRV 12S (020B1012) is a straight type check valve with a 1/2 inch solder (ODF) connection. Ideal for compact systems, this valve withstands a maximum working pressure of 49 bar. With its piston type internal mechanism, it provides safe, leak-tight and one-way flow. It offers long-lasting per..
$17.68
Ex Tax:$14.73
Brand: Danfoss
Model: 19.70.041
Danfoss NRV 16S (020B1018) is a high-quality straightway check valve with a 5/8 inch (16 mm) ODF solder connection. With a maximum working pressure of 49 bar and a Kv value of 4.04 m³/h, it provides safe, leak-tight and effective one-way flow control in medium-sized refrigeration systems. Thanks to ..
$21.16
Ex Tax:$17.63
-250x250.jpg "Danfoss 020B1019 NRV 19S 3/4\" ODF Straightway Solder Check Valve – 6.5 m³/h Kv, 49 bar")
Brand: Danfoss
Model: 19.70.061
Danfoss NRV 19S (020B1019) is a straightway check valve with a 3/4 inch (19 mm) ODF solder connection. With a maximum working pressure of 49 bar and a Kv value of 6.5 m³/h, it provides safe and efficient one-way flow in medium-sized refrigeration and air conditioning systems. Its piston-type interna..
$31.70
Ex Tax:$26.42
Brand: Danfoss
Model: 19.70.036
Danfoss NRV 12S (020B1052) is a check valve designed in straightway form with a 5/8 inch (16 mm) ODF solder connection. With a maximum working pressure of 49 bar and a Kv value of 2.42 m³/h, it provides one-way flow control in compact and medium-sized refrigeration systems. With its wide refrigerant..
$17.68
Ex Tax:$14.73
Brand: Danfoss
Model: 19.70.076
Danfoss NRV 19S (020B1054) is a high-quality straightway check valve with a 7/8 inch (22 mm) ODF solder connection. With a maximum working pressure of 49 bar and a Kv value of 6.5 m³/h, it provides one-way flow control in medium and large refrigeration systems. With its high temperature resistance a..
$31.70
Ex Tax:$26.42
-250x250w.jpg "Danfoss NRV 28s Angleway Check Valve (020-1025) – 28 mm ODF Brazed, Kv 16.5 m³/h, 46 Bar")
Brand: Danfoss
Model: 19.70.160
Danfoss NRV 28s (code 020-1025) is an angleway check valve that allows the refrigerant to pass in one direction only in refrigeration and air conditioning circuits. When the flow direction reverses, the valve closes; it prevents liquid migration when the compressor stops and backflow between paralle..
$100.38
Ex Tax:$83.65