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.
-250x250w.jpg "Danfoss NRVH 16s Check Valve (020B1038) – 5/8\" ODF Straightway Brazed, Strong Spring 0.20 bar, Kv 4.00")
Brand: Danfoss
Model: 19.70.154
The Danfoss NRVH 16s (code 020B1038) is a check valve that allows refrigerant to flow in one direction only and prevents reverse flow. With its piston design and brass body, it has a 5/8" (16 mm) ODF straightway brazed connection.
NRV or NRVH? The Difference Is the Opening Pressure: 0.20 bar, Not 0...
$47.18
Ex Tax:$39.32
Brand: Sanhua
Model: 41.08.002
Product Description
The Sanhua YCVS10-44GSHC-1 is a straightway piston check valve widely used in air conditioning and refrigeration systems. It ensures one-way movement of the refrigerant in the system and prevents reverse flow and potentially harmful pressure returns in the system. Thanks to its ..
$12.04
Ex Tax:$10.03
Brand: Sanhua
Model: 41.08.004
Product Description
The Sanhua YCVS17-66GSHC-1 check valve is a straight-type piston check valve specially designed for commercial refrigeration systems and industrial air conditioning applications. Its 3/4" ODF solder connection makes system integration easy. By preventing backflow, it ensures tha..
$24.89
Ex Tax:$20.74
Brand: Sanhua
Model: 41.08.011
Product Description
The Sanhua YCVS17-77GSHC-1 check valve is a backflow prevention valve with a high-efficiency straight piston design. With its 7/8" ODF solder connection, it integrates easily into refrigeration and air conditioning systems. It increases system safety by preventing backflow, whil..
$25.80
Ex Tax:$21.50
Brand: Sanhua
Model: 41.08.005
Product Description
The Sanhua YCVS20-77GSHC-1 L-type check valve is a high-performance piston-type check valve designed for commercial refrigeration systems and industrial air conditioning applications. With a 7/8 inch ODF connection size, this model has a maximum working pressure of 46 bar (4.6 M..
$37.46
Ex Tax:$31.21
Brand: Sanhua
Model: 41.08.006
Product Description
The Sanhua YCVS26-99GSHC-1 is a high-quality check valve with an L-type piston design, used to prevent backflow in refrigeration and air conditioning systems. With its 1 1/8" ODF connection, it integrates easily into large systems. With a maximum working pressure of 46 bar and a..
$85.72
Ex Tax:$71.43
Brand: Sanhua
Model: 41.08.008
The Sanhua YCVS31-DDGSHC-2 is an L-shaped piston-type check valve model designed to prevent backflow in high-capacity refrigeration and air conditioning systems. With a 42 mm ODF connection and a flow of 29.1 m³/h, this model provides high reliability and low pressure loss.
Technical Specificatio..
$99.66
Ex Tax:$83.05
-250x250.jpg "Sanhua YCVS3H01 Check Valve (Non-Return Valve) – 3/8\" ODF Solder, Kv 1.60, 49 bar")
Brand: Sanhua
Model: 41.08.015
Sanhua YCVS3H01 is a piston-type check valve (non-return valve) that allows flow in a refrigeration line to pass in one direction only. It has 3/8" ODF solder connections and a flow capacity of Kv 1.60 m³/h.
Piston-Type Check Valve That Shuts Off Reverse Flow — Prevents Refrigerant Migration During ..
$10.63
Ex Tax:$8.86
-250x250.jpg "Sanhua YCVS4H01 Check Valve (Non-Return Valve) – 1/2\" ODF Solder, Kv 2.64, 49 bar")
Brand: Sanhua
Model: 41.08.009
Sanhua YCVS4H01 is a piston-type check valve (non-return valve) that allows flow in a refrigeration line to pass in one direction only. It has 1/2" ODF solder connections and a flow capacity of Kv 2.64 m³/h.
Piston-Type Check Valve That Shuts Off Reverse Flow — Prevents Refrigerant Migration During ..
$12.40
Ex Tax:$10.34
-250x250.jpg "Sanhua YCVS5H03 Check Valve (One-Way Valve) – 5/8\" ODF Solder, Kv 4.00, 49 bar")
Brand: Sanhua
Model: 41.08.013
Sanhua YCVS5H03 is a piston-type check valve (one-way valve) that allows flow in one direction in the refrigeration line. It has a 5/8" (16 mm) ODF solder connection and a flow capacity of Kv 4.00 m³/h.
Piston-Type Check Valve That Closes Against Reverse Flow — Prevents Refrigerant Migration at Stan..
$17.52
Ex Tax:$14.60
-250x250h.jpg "Sanhua YCVS6H03 Check Valve – 3/4\" ODF Solder, Straightway, Kv 6.80 m³/h, 49 Bar")
Brand: Sanhua
Model: 41.08.014
Sanhua YCVS6H03 is a piston check valve that lets refrigerant flow in one direction only and prevents reverse flow (one-way valve / check valve). It has a 3/4" ODF solder connection.
Straightway (S) Body and Damper Spring: Free Mounting on Lines with Pressure Pulsation
This model is a straightway ("..
$24.89
Ex Tax:$20.74
-250x250h.jpg "Sanhua YCVS7H03 Check Valve – 7/8\" (22 mm) ODF Solder, Straightway, Kv 6.80 m³/h, 49 Bar")
Brand: Sanhua
Model: 41.08.012
Sanhua YCVS7H03 is a piston check valve that lets refrigerant flow in one direction only and prevents reverse flow (one-way valve / check valve). It has a 7/8" (22 mm) ODF solder connection.
Straightway (S) Body and Damper Spring: Free Mounting on Lines with Pressure Pulsation
This model is a straig..
$26.66
Ex Tax:$22.22
Brand: Sanhua
Model: 41.08.001
The Sanhua YCVS8-33GSHC-1 piston-type check valve is designed to safely ensure one-way flow in refrigeration systems. Preventing backflow, this valve is widely used in commercial refrigeration systems and residential/industrial air conditioning systems.
Key Features
Allows flow only in the c..
$10.63
Ex Tax:$8.86
