Straight Diaphragm Valve

Straight Diaphragm Valve Feature

1) A diaphragm valve where the flow path is nearly straight, with little pressure loss and deposit of fluid.
2) Suited for viscous fluids, dietary fibrous fluids, slurries, sludges, and fluids that contain floating solid matter.
3) Choose an actuator that meets your requirements. Applies to manually operated, pneumatically operated, and electrically operated types.
usage
Water purification plants, sewage treatment plants, etc.

There are two main categories of diaphragm valves: one type seals over a “weir” (saddle) and the other (sometimes called a “straight-way” valve) seals over a seat. The main difference is that a saddle-type valve has its two ports in line with each other on the opposite sides of the valve, whereas the seat-type has the in/out ports located at a 90 degree angle from one another. The saddle type is the most common in process applications and the seat-type is more commonly used as a tank bottom valve but exists also as a process valve. While diaphragm valves usually come in two-port forms (2/2-way diaphragm valve), they can also come with three ports (3/2-way diaphragm valves also called t-valves) and more (so called block-valves).

Material Size Temperature Applications
inches mm oF oC
Butyl rubber 0.6 – 14 15 – 350 – 22 to 134 – 30 to 90 Acids and alkalies
Nitril rubber 0.6 – 14 15 – 350 14 to 134 -10 to 90 Oils, fats and fuels
Neoprene 0.6 – 14 15 – 350 – 4 to 134 – 20 to 90 Oils, greases, air and radioactive fluids
Natural/synthetic rubber 0.6 – 14 15 – 350 – 40 to 134 – 40 to 90 Abrasives, brewing and dilute mineral acids
White natural rubber 0.6 – 5 15 – 125 – 31 to 134 – 35 to 90 Foods and pharmaceuticals
White butyl 0.6 – 6 15 – 150 – 22 to 212 – 30 to 100 Natural color, food, plastics and pharmaceuticals
Viton 0.6 – 14 15 – 350 41 to 284 5 to 140 Hydrocarbon acids, sulphture and chlorine applications
Hypalon 0.6 – 14 15 – 350 32 to 134 0 to 90 Acid and ozone resistant
Butyl rubber 0.6 – 14 15 – 350 – 4 to 248 – 20 to 120 Hot water and intermittent steam services, sugar refining
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