Your newborn has been hearing sounds since way back in the womb. Mother's heartbeat, the gurgles of her digestive system, and even the sounds of her voice and the voices of other family members are part of a baby's world before birth. Once your baby is born, the sounds of the outside world come in loud and clear.
Series DBV Brass Ball Valve. Full Port, Economical, 600 psi (41 bar) Series DBV Brass Ball Valve is an economical hand lever ball valve ideal for commercial or general industrial use. The Series DBV is the ideal choice for a manual shut off valve, along with many other applications. Valve body, body cap and ball are made of a quality brass for great durability. Seats and stem packing are constructed of PTFE for long lasting service as well.
The semilunar valves (SV) are two valve structures that sit between the right ventricle and the pulmonary artery and between the left ventricle and the aorta. The flaps of the valves open and close to allow the unidirectional flow of blood out of the heart, while preventing backflow of blood.The valve between the left ventricle and aorta is called the aortic valve and the valve between the pulmonary artery and right ventricle is called the pulmonary valve.The heart has two types of valves: the atrioventricular (AV) and semilunar.he flaps of the valves open and close to allow the unidirectional flow of blood out of the heart, while preventing backflow of blood. The valve between the left ventricle and aorta is called the aortic valve and the valve between the pulmonary artery and right ventricle is called the pulmonary valve.