28 Overall dimensions and technical information are provided solely for informative purposes and may be modified without notice PROCESS AUTOMATION TECHNOLOGY Process automation technology Catalogue Air service units Series 1700 Steel line Construction and operational characteristics Size Size 2 Size 3 Size 4 Body, bowl and adjustment mechanism AISI 316L stainless steel Caseback regulator AISI 316L stainless steel Adjustment screw, locking nut and fastening screws AISI 316L stainless steel (stainless steel A4-70) Internal components AISI 316L stainless steel Filtering elements AISI 316L stainless steel or HDPE (High density polyethylene) Springs AISI 316L stainless steel Seals NBR (standard versions and automatic drain) NBR for low temperatures (L versions) FPM - HNBR (H versions) EPDM-FDA (EF versions) Silicone - PU (Z version) Automatic drain Brass, stainless steel AISI 304 and AISI 302, sintered bronze Acetal resin, NBR, FPM Operating range Size Size 2 Size 3 Size 4 Fluid Filtered air. No lubrication needed, if applied it shall be continuous Inert gases Natural gases Working temperature (°C) -30 ... +80 (standard version) -50 ... +80 (low temperature L version) -60 ... +80 (low temperature version -60 °C Z) -5 ... +150 (high temperature H version) -5 ... +70 (automatic drain S version and reduced orifice automatic drain SR version) -40 ... +100 (EPDM-FDA version) Maximum working pressure (bar) 20 (standard, low and high temperature versions) 16 (automatic drain version) 10 (reduced orifice automatic drain version) Maintenance : Suitable up to SIL 3 : CU - TR 012 Certifications available II 2G Ex h IIC Gb II 2D Ex h IIIC Db Filtration elements and filter regulator are reusable through blowing and/or washing and is made of stainless steel or HDPE (high density polyethylene). To replace, remove the cup, loosen the set screw of the support and replace the filter element with a new one or refurbished one. Replace the regulator diaphragm whenever the performance is compromised or if there is a continuous discharge from the relieving hole (over-pressure exhaust). Fully discharge the adjustment spring before removing the adjustment mechanism. For other maintenance activities, due to complexity of assembly and requirement for dedicated PNEUMAX testing activities, it is strongly recommended to contact the manufacturer.
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