low temperature check valve in refrigeration system

{"cid":"91138559","title":"Low Temperature Walk-In Freezer Condensing Unit For Refrigeration","imgUrl":"https:\/\/img.chinax.com\/nimg\/2b\/1b\/b08951d0ab1eeafb857279b80b79-200x200-1.jpg","attrs":{"Price":"USD 10000 Per Unit","Brand Name":"Ourfuture","Model Number":"OBBH4-80M","Minimum Order Quantity":"1 unit","Delivery Time":"20 days","Certification":"CE, ISO9001:2008, 3C","Place of Origin":"China","Payment Terms":"L\/C, T\/T","Supply Ability":"100 units per month","Packaging Details":"Plastic film with plywood case","Compressor brand":", Carlyle, Bock, Fusheng, Hanbell, etc.","Refrigerant":"R404a, R22","Voltage":"380\/3Phase\/50Hz, 220V\/1Phase\/60Hz","Use":"Cold room, refrigeration, supermarket, pharmacy, meat produce","Key components":"Danfoss, Siemens, Ebmpapst","Compressor type":"reciprocating compressor, screw compressor, scroll compressor"}}