Pressure Regulator is a valve that automatically cuts off the flow of a liquid or gas at a certain pressure for the purpose of preventing damage to plumbing. They are used at the water inlet of recreational vehicles. The application of a pressure regulator is on a tank of oxygen used for breathing. Pressure regulator uses the outside air as a reference to the baseline pressure.
Pressure relief regulators offer fast, positive response service for air, all types of gas fuels, and inert gas applications. These can be used as bypass valves in automatic safety systems, and as high capacity relief regulators downstream of reducing regulator stations and inert gas generators.
A pressure restricting valve is a variation of the globe valve. The valve is used when the pressure range of the piping system is under 175 PSI. Under flow conditions the valve will restrict the water pressure to the required working pressure. If full system pressure is required the valve can be adjusted manually to furnish the maximum available pressure.
Pressure Roller is a combination of drive roller forms and a nip for moving the lenticular materials. It is skewed at an angle to an axis of the first drive roller. A second pressure roller forms a second nip in combination with a tensioning roller for tensioning the lenticular material. A scanner writes an image to the lenticular material (43) as it passes between the first and second nip.
Pressure sand filters are suitable in use for the treatment of swimming pool water. These filters use graded sand as the filter medium in circular steel or glass-reinforced plastic tanks. These vary in size from small single units for private house pools to a battery of large units for public pools. There are two types, vertical downward flow, and horizontal. The degree of filtration depends on the grain size of the sand used in the filter and this in turn is a function of the filtration rate used in the filter vessel.