Precision and Instrument Regulators 1/4" port size

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1 Section 8 Precision and Instrument Regulators /" port size Contents -8 Precision Air Pressure Regulator /" ports ale-8-2 R38 Instrument Regulator Aluminum Model /" ports ale R38 Littleton, CO USA Phone Fax ALE-8-

2 -8 Precision Air Pressure Regulator /" Port Size Fast response Minimum overshoot during flow changes Precision regulation obtained by pilot valve design - small change in the pilot valve position results in a large change in the main valve position Constant bleed feature provides maximum sensitivity to system changes Relieving feature allows reduction of downstream pressure when the system is dead-ended Ordering Information. Models listed have PTF threads, hand wheel adjustment, and relieving diaphragm. A gauge is not included. Port Size Outlet Pressure Adjustment Range* Model Number Flow scfm (dm 3 /s) Weight lbs (kg) /". to (.3 to.69 ) (5.66). (.6) /". to (. to. ) -8-2 (5.66). (.6) /" 3 to 5 (.2 to.3 ) -8-2 (5.66). (.6) * Outlet pressure can be adjusted to pressures in excess of, and less than, those specified. Do not use these units to control pressures outside of the specified ranges. Typical flow with (7 ) inlet pressure, (. ) set pressure and.25 (.9 ) droop from set. Typical flow with 2 ( ) inlet pressure, (. ) set pressure and.25 (.7 ) droop from set. Alternative Models Threads PTF ISO G parallel 8 ISO G Rc 9 Screw Adjustment - with slotted screw adjustment - with slotted screw adjustment 2 ISO Symbols Relieving Service Kits Type Part number Low Pressure Models High Pressure Models Special tool to install main valve seat 68- Service kit includes o-rings, seals, pilot diaphragm, pilot spring, main diaphragm, main valve, main valve seat, diffuser screen, constant bleed orifice and orifice filter See Section ALE-25 for Accessories ALE-8-2 Littleton, CO USA Phone Fax

3 Technical Data Fluid: Compressed air Low Pressure Models: -8- and -8-6 High Pressure Models: -8- Inlet pressure range* Low Pressure Models: 8 to 5 (.55 to.3 ) High Pressure Models: to 2 (.7 to 3.8 ) * Inlet pressure must be at least 7 (.5 ) greater than the adjusted outlet pressure for proper operation. Operating temperature*: 32 to F ( to 7 C) ** Air supply must be dry enough to avoid ice formation at temperatures below 35 F (2 C). Flow capacity with (6.9 ) inlet pressure -8-6: 2 scfm (5.7 dm 3 /s) with set pressure of (.7 ) -8- and -8-: 2 scfm (9. dm 3 /s) with set pressure of 2 (. ). A small pressure droop occurs at flows above 2 scfm (5.7 dm 3 /s). Repeatability Low Pressure Models:.2 (. ) for flow change;.5 (. ) when turning supply off and on High Pressure Models:.8 (.6 ) for flow change;.6 (. ) when turning supply off and on Constant bleed feature: Under dead-end conditions, a small, constant bleed of pilot air will escape thru the relief passage in the bottom plug. This will be accompanied by a slight residual outlet pressure of to inches H 2 O (2.5 to milli). Gauge ports: /" PTF with PTF main ports Rc/ with ISO G and ISO Rc main ports Materials Body: Zinc Bonnet: Zinc Main valve: Polycarbonate Main valve seat: Teflon Pilot valve: Stainless steel Pilot valve seat: Aluminum Main diaphragm: Nitrile Pilot diaphragm Low Pressure Models: Beryllium copper High Pressure Models: Nitrile Bottom plug: Brass Elastomers: Nitrile, neoprene, polyurethane All Dimensions in Inches (mm) 2.2 (5) -8 Precision Air Pressure Regulator Typical Performance Characteristics LOW PRESSURE MODELS - FLOW CHARACTERISTICS : (7 ) RANGE: to (. to. ) scfm dm 3 /s LOW PRESSURE MODELS - REGULATION CHARACTERISTICS : 5 (.3 ) RANGE: to (. to. ) HIGH PRESSURE MODELS - FLOW CHARACTERISTICS : 2 ( ) RANGE: 3 to 5 (.2 to.35 ) 2.2 (5) scfm dm 3 /s 2.52 (6).56 ().55 (6) Panel mounting hole diameter:.7" (2 mm) Maximum panel thickness:.9" (2. mm) HIGH PRESSURE MODELS - REGULATION CHARACTERISTICS : 2 ( ) RANGE: 3 to 5 (.2 to.3 ) Littleton, CO USA Phone Fax ALE-8-3

4 R38 Instrument Regulator Aluminum Model /" Port Size Compact instrument units with high performance Stable regulation with temperature compensation Excellent flow and regulation characteristics Panel Mounting facility Ordering Information. Models listed are relieving type with.6 to (. to 2 ) outlet pressure adjustment range *, and PTF threads. A gauge is not included. Port Size Model Number Flow scfm (dm 3 /s) Weight lbs (kg) /" PTF R38-2-RNCA 7 (8).6 (.8) Typical flow with (7 ) inlet pressure, 5 ( ) set pressure and (.5 ) droop from set. Port Size / PTF 2 Material Aluminum, nitrile elastomers Aluminum, Viton elastomers Mounting Option Without With bracket and nut With panel nut only 2 With handwheel and nut 3 With handwheel, bracket and nut With handwheel only 5 ISO Symbol R Threads PTF ISO Rc taper ISO G parallel API.LP.INT A B D K Outlet Pressure Adjustment Ranges*.6 to (. to 2 ) C to (.7 to ) F 3.6 to (.25 to 7 ) K Gauges Without Diaphragm Relieving Non relieving N R N * Outlet pressure can be adjusted to pressures in excess of, and less than, those specified. Do not use these units to control pressures outside of the specified ranges. See Section ALE-25 for Accessories ALE-8- Littleton, CO USA Phone Fax

5 R38 Aluminum Instrument Regulator Technical Data Fluid: Compressed air Maximum pressure: 29 (2 ) Operating temperature: - to 75 F (- to 8 C) * * Air supply must be dry enough to avoid ice formation at temperatures below 35 F (2 C). Typical flow at (7 ) inlet pressure, 5 ( ) set pressure and a droop of (.7 ) from set: 7 scfm (8 dm 3 /s) Typical relief differential at (2 ) outlet pressure: 2.3 (.6 ) Maximum bleed flow at (2 ) outlet pressure (relieving types only):.3 scfm (.5 cm 3 /s) Maximum bleed rate occurs under dead-end (noflow) conditions. Gauge ports: / NPT Materials Body: Aluminum Bonnet: Aluminum Adjusting screw: Steel Elastomeric materials: Nitrile Typical Performance Characteristics g FLOW CHARACTERISTICS - PORT SIZE: /" - (7 g) scfm dm 3 /s REGULATION CHARACTERISTICS - PORT SIZE: /" All Dimensions in Inches (mm).26 (32) 2.52 (6) g 5 MAXIMUM RECOMMENDED FLOW THROUGH /" PIPE % % 2% % FLOW scfm dm 3 /s (6) 2.95 (75) (3) (2) g 5.7 (5) 2.9 (53).8 () Panel mounting hole diameter:.65" (2 mm) Panel thickness: " to.2" ( to 6 mm) Service Kits Item Type Part number (2 ) Range Relieving R38--R Non relieving R38--NR, 5 (, 7 ) Range Relieving R38--R Non relieving R38--NR Service kit includes diaphragm assembly, o-ring, valve, valve spring and 8 pan head screws. Littleton, CO USA Phone Fax ALE-8-5