F&J - Model LV-22 - Environmental Low Volume Air Sampler (110V)
Model LV-22 is a low volume air sampler consisting of a 1/4 HP oil-less, carbon vane vacuum pump with an air flow regulator for use where a nearly constant air flow is desirable. The regulator holds a constant pressure drop across an in-line orifice by varying the flow through a bypass valve into the pump. This system allows the pump to work at a minimum pressure drop at all times by permitting it to run cooler; thus extending its service life. The oil-less pump requires no lubrication to maintain optimal efficiency during its service life. The LV-22 is enclosed in a weather resistant aluminum environmental cabinet, Model WH-3. An optional mechanical volume totalizer is available for the LV-22 Air Sampler.
It should be noted that as pressure varies, the flow through an orifice with a constant pressure drop varies approximately as the square root of the ratio of the absolute pressure. Thus, if paper loading causes a pressure drop to one-half of the original value, the orifice is adjustable, allowing a flow rate adjustment from near-zero up to the pump’s maximum capacity. Best long-term regulation is maintained at or below 2 cubic feet per minute (57 liters per minute).
The typical operating flow range is 1 to 3 CFM (10 – 100 LPM).
- Constant air flow regulator adjustable by user
- Powder coat painted aluminum enclosure with cooling fan
- Durable oil-less carbon vane pump designed for continuous use
- Internal intake and exhaust mufflers
- Rotometer, elapsed time meter and vacuum gauge
- 110– 120VAC, 50/60Hz; single phase