of the chosen regulator must also be consid-ered.A variety of spring ranges are offeredwith most regulators. Ideally the regulators should be operated inside the middle third oftheir range, since at the lower end of theirrange the spring loses some sensitivity and at the higher end may suffer in linearity. Also low rate springs can help reduce pressure droop, so springs can be selected to best fit the systems requirements.If a precision regulator is requireddecide on the level of sensitivity, flow andregulation characteristics and if required relief capacity and temperature sensitivity.Select only a regulator suitable for its application. Correct selection could see a general purpose regulator with ordinary performance characteristics fulfilling what may be considered a precision regulators function without system degradation at a lower installed cost and more cost efficiently.

Clean Compressed Air Brochure - 14694 FILTER/REGULATORS

Figure 27.GENERAL PURPOSE FILTER/REGULATOR

Filter/regulators both clean the air to theapplication and control the pressure in one compact unit. For general purpose applica- tions filter/regulators are usually lower cost than two separate units.Some specialist filter/regulators areavailable for instrument applications with fine particle removal or even oil removal proper- ties with precision regulator characteristics, as are others with special material compati- bility.

Figure 26.NORGREN FILTER/REGULATOR FLOW CAPABILITIES. PipeUnitFlow (dm

/s)* Size

Figure 25.GENERAL PURPOSE REGULATOR FLOWS

*Flow with 10 bar inlet, 6,3 bar outlet and 1 barpressure drop. PipeUnitFlow (dm

/s)* Size

Figure 28. ALUMINIUM INSTRUMENT FILTER/REGULATOR

*Flow with 10 bar inlet, 6,3 bar outlet and 1 barpressure drop. 13