Ammonia valves are necessary for systems transporting ammonia due to its corrosive nature. They use corrosion-resistant materials and have safety features such as relief valves. Proper maintenance and training are important for safe operation.
An ammonia valve is a valve available for use in applications where ammonia will be present. A special valve is required because ammonia is corrosive and could damage a normal valve, causing a leak and potentially creating a dangerous situation. Manufacturers of chemical equipment and supplies typically carry devices rated for use with ammonia, and people can order them through catalogs or stores. It is important to ensure that the valve size and pressure rating are appropriate for the application.
A number of systems transport ammonia, from the anhydrous form used by some farmers to the purified ammonia extracted during chemical processes. Valves are needed to control leaks, release pressure and allow people to move the contents of the system from one place to another. The ammonia valve uses materials known to resist corrosion, including appropriate gasket material to tightly seal the valve when the operator closes it. The top can be color-coded or otherwise marked so people know what’s behind the valve.
A safety valve can sense dangerous pressure increases within a system and open to allow the contents to escape in a controlled manner, preventing an explosion. The ammonia relief valve can be routed to a reserve tank to prevent spillage. This allows people to maintain safe operating conditions with the use of automated equipment that kicks in when there is a problem with the system. The ammonia valve may also have a safety device to force people to check the system before closing it again so unsafe conditions do not recur.
Companies can use a variety of materials to make an ammonia valve. The size varies, allowing for installation on different types of systems, and the factory will test the valve to make sure it is sound and to determine how much pressure it can handle. The packaging will indicate the recommended uses according to the manufacturer. The manufacturers assume no responsibility for situations where people use their products incorrectly.
As with all fittings, it is important to properly maintain an ammonia valve. People should note the installation date and any service recommendations such as replacing the liner on the valve at a set date to reduce the risk of leaks. It is important to verify that the valve opens and closes smoothly and that it is easy to access and use for any operator. People who work with any type of system where hazardous chemicals are present also need training on how safety systems work and what to do if material is accidentally released.
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