Regulators Models 40, 41, and 42 Precision Pressure Regulators Technical data Air Consumption See Graph 3 Drift Effect See Graph 4 Exhaust-Flow Rate (at 25-psig setting) Pressure rise of 0.25 psig will result from flow of: Model 40: 1.5 scfm Model 41: 2.4 scfm Model 42: 1.7 scfm Maximum Flow Capacity See Graph on page 4.4 4 Standard Mounting In-line pipe or flush panel up to 1/4" thick (bushing for 3/4" thick panel is optional) Connections: (supply and outlet) Model 40: 1/4" NPT Model 41: 1/8" NPT Model 42: 1/2" NPT Materials of Construction (materials in contact with regulated media) Brass, stainless steel, Neoprene, aluminum, and zinc Accessories P/N 2932-19 - Mounting Bracket for surface mounting (Model 40 and Model 42) P/N 10963-73 - Mounting Bracket for surface mounting (Model 41) P/N 3603-22 - Locknut 4.2 Options Air Loading Provision for supplementary air loading (100 psig max) in addition to spring loading Model 42: 1/4" NPT Model 41: 1/8" NPT Model 40-2: Not available Add [A] into the model number. Example: 40A15 Tapped Exhaust Provision for piping exhaust flow away from the regulator Model 42: 1/8" NPT Model 40 & 41: Not available Add [E] into the model number. Example: 42E15 Deletion of Safety release Valve (SRV) The SRV increases exhaust flow capacity when the regulator must exhaust large flows. Deletion of the SRV will improve drift characteristics (see Graph 4). The SRV is not available with the Seimens 41. It is standard with: Model 40: 2, 7, 15, 30, 50 & H50 pressure ranges Model 42: 15, 30, 50, H30, & H50 pressure ranges To delete the SRV, add an [X] into the model number. Example: 40X15 Regulators Models 40, 41, and 42 Precision Pressure Regulators Technical data Graph 1 Droop Effect 4 Test Procedure: Each 30-psig-range regulator was adjusted to 25 psig with 100 psig supply and no flow. Flow was increased to maximum capacity. All regulated pressure readings were taken at gauge connection in the body of the regulator. 4.3 Regulators Models 40, 41, and 42 Precision Pressure Regulators Technical data Graph 2 Maximum Air Flow, SCFM Delivered 4 * Supply pressure for other models will be determined by multiplying the pressure(s) above by the flow values shown below: Model Model 40H Model 42 Model 42H Graph 3 Air Consumption Value 4.5 4 14 Graph 4 Drift Effect Test Procedure: Regulators were set at 20 psig output with 100 psig air supply. Supply was turned off for one week, after which supply was turned on at time 0. The Nullmatic regulator bleeds only the amount of air that passes through the pilot nozzle when there is no demand for output flow. The exhaust port starts to close as soon as the flow of regulated air is increased to the output, and it closes completely before the pilotplunger valve opens. Full pilot flow is then delivered to the output. 4.4 Regulators Models 40, 41, and 42 Precision Pressure Regulators Technical data Model Selection Supply Pressure psig Model No. 40-21 40-7 40-15 40-30 40-50 40-100 40-200 40-300 40-450 41-15 41N152 41-30 41-50 41-100 41-2550 42-15 42-30 42-50 42-100 42-200 Range psig3 Recommended Maximum (1-50"H2O) (6-200"H2O) 0.5-15 1-30 1-50 1.5-100 3-200 7-300 15-450 0.5-15 0.5-15 1-30 1-50 1.5-100 25-50 0.5-15 1-30 1-50 1.5-100 3-200 5-10 50 75 120 120 150 250 350 500 75 75 120 120 150 120 75 120 120 150 250 25 100 150 150 150 500 500 500 500 150 150 150 150 250 150 150 150 150 500 500 Standard Modifications X A&X A&X A&X H, A & X H&A A A A A 4 A A A A, E & X H, A, E & X H, A, E & X H, A & E A&E Standard Modifications H - High flow capacity. A - With pressure-tight top housing, containing 1/4" NPT connection for supplementary air loading. E - With 1/8" NPT connection to collect exhaust X - Without safety release. 1) Includes locknut on adjusting stem (optional for all other models). 2) For use with Model 65 Square-Root Extractor to maintain minimum 3 psig output. 3) At recommended supply pressure. 4.5