Description Kenworth Expansion Valve Block Slim Line Replaces OEM: 540446BSM Application: Kenworth Description: Expansion Valve Block Standard Rating: 2 Ton Mount Type: Block Refrigerant: R12/R134a O-Ring #1: 0011/0015 O-Ring #2: 0013/0013 Hose Inlet Size: #6 Hose Outlet Size: #10 Evaporator Inlet Size: #8 Evaporator Outlet Size: #8 Note: Flange Sealing Washer Type Liquid Inlet from Condenser: #6 – 3/8″ Liquid Outlet to Evaporator: #8 – 1/2″ Suction Inlet from Evaporator: #8 – 1/2″ Suction Outlet to Compressor: #10 – 5/8″