Emerson
New manifold valve design for pressure transmitters
Manifolds shut off or equalize pressure at the transmitter, and also provide the critical mounting mechanisms required in many installations. The recently introduced Rosemount R305 Integral Manifolds and Rosemount R306 In-line Manifolds (photo) have been designed to offer significant user improvements on these basic functions. The most important improvement for both manifolds is the new Pressure-Lock Valve design, which simplifies high-pressure operation, increases safety and enhances reliability. New features include: a two-piece stem that does not rotate in the seat, providing solid closure with minimal wear; easier turning while delivering positive shut-off; an adjustable packing nut that simplifies valve maintenance; and back seating that prevents blowouts for increased user safety. The stem and bonnet threads are fully isolated from the process fluid to minimize potential corrosion, and modular packing ensures only the stem and body are exposed to the process fluid. — Emerson, Shakopee, Minn.