This story appears in the Aug. 8 print edition of Equipment & Maintenance Update, a supplement to Transport Topics. In the wake of federal clean-air mandates in 2007 and 2010, maintenance technicians ...

Medications may help in treating certain symptoms and supporting better heart function. But there are currently no drugs that can treat or cure specific heart valve disorders. Your heart has four ...

Motion-control valves solve troublesome equipment-instability problems. • Overcenter, or motion-control valves, are well suited for load holding and control. • Standard overcenter valves can solve the ...

You can develop shortness of breath if you have heart valve problems. This is because your heart valves help move blood through the four chambers of your heart and throughout your body. Your heart ...

The four valves of the heart allow blood to flow through the heart in the right direction. The valves open or close each time the heart beats. Problems with the heart valves can lead to palpitations, ...