Blackmer pumps create less noise, vibration
Oct 1, 2007 12:00 PM
Blackmer has announced that its LGL and LG Series sliding vane pumps produce less noise and less vibration, resulting in longer pump life and reduced costs. Engineered specifically for LPG/NH3 flow applications, the LGL and LG pump lines were designed for cylinder filling, motor fueling, bulk transfer, vaporizers, and on bobtails and transports.
The firm's patented cavitation suppression liners, included on 1.25- through 4-inch models, “cushion” the effects of collapsing vapor bubbles within the pump, sharply reducing noise, vibration, and wear normally caused by entrained vapors. The sudden collapse of vapor bubbles inside the pump is known as cavitation, the main cause of excess noise and added vibration in a pump. By allowing a controlled amount of fluid at discharge pressure to bleed back toward the suction of the pump, vapor bubbles are collapsed over a longer period. Up to 12 decibels (dBA) of noise is eliminated with Blackmer LGL and LG pumps due to cavitation suppression technology. The noise level of average factory machinery is 100 dBA.
Available in 1- to 4-inch port sizes, with capacities ranging from 5 to 350 United States gallons per minute (19 to 1,325 lpm), all LGL and LG models are constructed with ductile iron for thermal shock resistance, low-friction ball bearings for high efficiency and quiet operation, and threaded lock collars that prevent end-thrust wear. LGL and LG pump technology uses a rotor with sliding vanes that draw the liquid in behind each vane, through the inlet port, and into the pumping chamber. As the rotor turns, liquid is transferred between the vanes to the outlet, where it is discharged as the pumping chamber is squeezed down. Each vane provides a positive mechanical push to the liquid before it. Each revolution of a Blackmer pump displaces a constant volume of fluid; variance in pressure has minimal effect.
E-mail Jim Becker at becker@blackmer.com for more information.
