Sampling pump Ei-838

diaphragmbrushless DCstationary

*See notes below for doing leakchecks on diaphragm pumps in Method 5 sampling.* German-engineered and American-made diaphragm pump Lightweight and compact design Compatible with all Apex Instruments sampling equipment Easy to attach, self-sealing EPDM tubing Fast and knuckle-friendly durable polypropylene shell Specifications: Motor: 24 BLDC (Brushless DC) KNF 838 Motor Measured Flow: 70 LPM (2.5 CFM) at free flow, 21 LPM (0.75 CFM) at 15 inHg Maximum Vacuum: 25.5 inHg Weight: 16 lbs, (7.25 kg) Special Back Half Leak Check Consideration: For metering systems having diaphragm pumps, the normal leak-check procedure will not detect leakages within the pump. For these cases, the following leak-check procedure is suggested: make a 10-minute calibration run at 0.00035 cubic meters per minute (0.02 cubic feet per minute); at the end of the run, take the difference between the measured wet test meter and the dry gas meter volumes; divide the difference by 10, to get the leak rate. The leak rate should not exceed 0.00057 cubic meters per minute (0.02 cubic feet per minute). [Section No. 3.4.2, Page 5 of 22, Quality Assurance Handbook by EPA, 1980 Version]