A valve assembly (100) is provided. The valve assembly (100) comprises a housing (101) with a plurality of fluid ports (102-105d). The housing (101) includes an actuator chamber (107) configured to receive a fluid. The housing (101) also includes a valve chamber (108) configured to receive the fluid after flowing through the actuator chamber (107). The valve assembly (100) further includes one or more shape memory alloy elements (109a-109d) located within the actuator chamber (108). One or more valve seals (220a-220d) located within the valve chamber (108) are provided. The shape memory alloy elements (109) are coupled to each of the valve seals (220a-220d) to selectively move the valve seals (220a-220d) between a first position and a second position upon heating the corresponding shape memory alloy element (109a-109d) above a transformation temperature.