There are many methods of sealing valve stems on control and isolation valves. When chosen carefully, a valve stem seal provides years of reliable service, reduces environmental emissions, and ...

Based on the control valve C method, published data suggests that a much bigger FBBV is needed to match the desired capacity of an isolation-type valve. In reality, the two valve types should be the ...

Nature Photonics spoke to Zongfu Yu and Shanhui Fan from Stanford University about their proposed 'one-way valve for light ... optical isolation on the chip scale is becoming increasingly important.