Archive for February, 2012
In standard valves, when it is given a command to open to a certain point, there is no feedback to verify that the valve has opened to that position. With a valve positioner, the command is given and the valve positioner reads the opening, verifying the position and readjusting until it gets it to the [...]
Customers wanting the best in Needle Valves need look no further than Swagelok to meet all their needs. Swagelok Needle Valves are used in flow metering applications, where a constant, calibrated flow must be maintained. A Needle Valve has a long tapered point at the end of the valve stem that is lowered through the [...]
Over the decades, polyvinyl chloride (PVC) valves have penetrated both commercial and domestic domains. PVC valves made with suitable additives provide the desired physical and chemical compatibility. Although they have limited use in high temperature applications, advances in PVC technology have enabled manufacturing of the valves with reasonable tolerance to medium range temperatures. In a [...]
LISLE, Ill. — Navistar International revealed during its analyst day that it has halted deliveries of all new trucks due to a faulty valve in Bendix braking systems