ITT Engineered Valves Diaphragm Weir Valves

Features & Benefits: Bonnet Isolation The diaphragm isolates the working parts of the valve from process fluids. Streamlined Fluid Passage The smooth contoured body has minimal pockets, cavities or dead spaces, which prevent accumulation or stagnation of process fluids or contaminants. No Packing Gland or Packing No more packing gland adjustment required or stem packing leakage problems for improved control of fugitive emissions. Positive Leak Tight Closure Bubble tight closure is provided in accordance with MSS SP-88. In-Line Maintenance Easily maintained when required for reduced downtime and lower cost of ownership. Line-Lok Unique feature in all plastic lined weir valves that prevents liner flexing over the weir, which reduces the potential for liner cracking. Molded Closed 2-Piece PTFE Diaphragm Diaphragms are molded to the exact contour of the weir for superior shutoff capabilities. 2-piece configuration eliminates delamination of PTFE which is common to 1-piece configurations. Superior flex life Reduced permeation Excellent chemical resistance Adjustable Travel Stop Prevents overclosure of the valve and prolongs diaphragm life. The adjustability feature assures that leak-tight shutoff can be maintained throughout the valve's life. Bronze Bushing Reduces turning torque and enhances cycle life in "dirty" atmospheres. Sealed Bonnet Offers secondary process containment to control fugitive emissions. Supplied with leak detection port as standard. Floating Tube Nut Prevents point loading of the stud on PTFE diaphragms, which enhances diaphragm life, particularly in high temperature and high cycle applications. 100% Seat & Shell Testing All valves are pressure tested bubble tight prior to shipment. No visible leakage is allowed. Extensive selection of body and diaphragm materials and actuation packages. Allows optimum selection of materials for service conditions, often without expensive upgrades.