MD PRO Normally closed proportional solenoid valve FEATURES · 2-way normally closed · Offers automated calibration · Provides repeatability across its operating range · Offers a superior combination of value and performance · Rated for 10 million life cycles MEDIA COMPATIBILITY Air, argon, helium, hydrogen, methane, nitrogen, oxygen & others PHYSICAL PROPERTIES ELECTRICAL Power Voltage max. 2 W max. 5.5, 8, 11.5, 13.5, 20 or 29 VDC Operating environment 0 to 60 °C Storage temperature -40 to 70 °C Length 45.3 mm (1.785 in) Width 16.5 mm (0.625 in) Height 17 mm (0.67 in) Porting 1/8" barbs; manifold mount with 43 µm screen Weight 63 g (2.2 oz) 0.508 cm3 (0.031 in3) Internal volume Filtration (recommended) Lubrication Oxygen clean E / 11253 / A 43 µm None required Available on special request 1/4 www.first-sensor.com www.sensortechnics.com MD PRO Normally closed proportional solenoid valve PERFORMANCE CHARACTERISTICS Part no. Pressure MDPRO4... 0...75 psid MDPRO5... 0...100 psid MDPRO6... 0...50 psid Vacuum Orifice siz es 0.040" (1.02 mm) 0...27 "Hg (0...13 psi) 0.050" (1.27 mm) Leak rate1 R esp o n se ≤0.22 sccm of ai r (bubble tight) <30 msec cycling 0.065" (1.65 mm) FLOW CURVE2 Notes: 1 sccm denotes Standard Cubic Centimeters per Minute. It is a unit for the flow rate at standard conditions of temperature and pressure. 1000 sccm = 1 slpm. 2 slpm denotes Standard Liters per Minute. It is a unit for the flow rate at standard conditions of temperature and pressure. 1 slpm = 1000 sccm. E / 11253 / A 2/4 www.first-sensor.com www.sensortechnics.com MD PRO Normally closed proportional solenoid valve OUTLINE DRAWING Basic valve dimensions Port and mounting hole diagrams dimensions in inches (mm) E / 11253 / A 3/4 www.first-sensor.com www.sensortechnics.com MD PRO Normally closed proportional solenoid valve ELECTRICAL INTERFACE OPTIONS MDPRO...F... (Wire leads, no terminals) MDPRO...P... (PC mount, 4 pins) PNEUMATIC INTERFACE OPTIONS MDPRO...1... (No barbs, face seal to manifold with screeen) MDPRO...8... (0.125" barbs, 1/8" I.D. tubing, 1/4" O.D. max) ORDERING INFORMATION Model no. Series Options MDPRO Max. pressure 4: Orifice size 75 psid 0.040" Coil selection Elastomer V: FKM A: 5.5 VDC 11 Ω 0.304 A B: 8 V DC 23 Ω 0.212 A C: 11.5 VDC 47 Ω 0.152 A D: 13.5 VDC 68 Ω 0.125 A E: 20 V D C 136 Ω 0.091 A F: 29 V D C 274 Ω 0.066 A (1.016 mm) 5: 100 psid 0.050" (1.270 mm) 6: 50 psid 0.065" Electrical interface Pneumatic interface F: wire leads, 18" 1: manifold mount with screens* S: standard cleaning P: PC board mount 8: 1/8" barbs O: oxygen service* * 43 µm screen (port 2) * this option will affect price; contact Sensortechnics for details Max. ResisCurrent*** voltage* tance** (1.651 mm) * max. voltage for continuous full flow, ambient temp. 55°C ** coil resistance for room temp. *** input current for full flow Example: MDPRO 4 V A F 8 Cleaning S Note: Not all combinations might be available. Please contact First Sensor for further information. First Sensor reserves the right to make changes to any products herein. First Sensor does not assume any liability arising out of the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. E / 11253 / A 4/4 www.first-sensor.com www.sensortechnics.com