CONTROL SYSTEMS

12BY JIM CASEY

The author first wrote about control valves in a Back to Basics article last summer. Now he expands on that topic by discussing other elements of the “cruising” control system.

SPECIALIZED DESIGNS FOR

PIPELINE VALVE ACTUATION
22

The expansion of oil and gas production into increasingly remote and inhospitable areas challenges actuator manufacturers to produce rugged, reliable and often specialized products.

BY MARK CLARK

34

BUILDING AN

ACCEPTABLE
MANUFACTURERS LIST

What’s involved in developing an Acceptable Manufacturers List (AML)? And why is having an AML so critical when sourcing valves from China?

BY PATRICK A. TOENSMEIER

AUTOMATED

VALVE PACKAGES

40BY JACK DIFRANCO

Advanced controllers have revolutionized automated valve packages by offering greater intelligence and diagnostic data than conventional methods.

SPECIAL VALVE CATALOG PREVIEW:

WHO MAKES WHAT?
47

The 8th edition of North American Valve Catalog is now available, both in print and online. Included in this special preview from the catalog is the VMA Member Product Matrix, where you can find out “who makes what” from 75 companies that manufacture valves, actuators and controls.