Danfoss CHV-140B 15-20 function module (Top Complete) for the 140 bar (2030 psig) SVL Flexline range for industrial R744 (CO2) sub- and trans-critical refrigeration, code 148B6873. The function module is the complete top part that gives an SVL-140B multifunction valve body its check-valve duty: it fits SVL-140B 15 and SVL-140B 20 bodies and can be exchanged without cutting the body out of the line. As a check (non-return) function it opens with forward flow and closes against reverse flow to prevent back-flow of refrigerant. Maximum working pressure 140 bar (2030 psig); media temperature range -40 to 150 C (-40 to 302 F). Supplied as a module only — the mating SVL-140B body (with the required connection and direction) is ordered separately.