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 ...

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, ...

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 ...