If there is no increase in pressure, the power element is dead. This can be done by using a halide leak detector. When you perform this test, it is important that the body of the valve have a fairly high pressure applied to it. In addition, the gauges and other fittings should be made up tightly at the joints to eliminate leakage at these points. If the expansion valve is defective, it must be replaced.
Most valves used on naval ships have replaceable assemblies.
Sometimes it is possible to replace a faulty power element or some other part of the valve without having to replace the entire assembly. When replacement of an expansion valve is necessary, you must replace the unit with a valve of the same capacity and type. Integrated Publishing's Official Web Page Click here for a current index of everything on this web site. All Rights Reserved.