backing pump

backing pump

[′bak·iŋ ‚pəmp]
(mechanical engineering)
A vacuum pump, in a vacuum system using two pumps in tandem, which works directly to the atmosphere and reduces the pressure to an intermediate value, usually between 100 and 0.1 pascals. Also known as fore pump.
References in periodicals archive ?
Tenders are invited for Supply And Installation Of Turbomolecular Pumping Station With Two Stage Rotary Backing Pump And Its Accessories As Per The Technical Specification Mentioned In Our Tender Documents-3 Systems.
It also has an integrated "intermittent operation" function that switches on a backing pump only when the backing pressure is no longer sufficient.
The HiPace 300 H also has an integrated "intermittent operation" function which switches on a backing pump only when the backing pressure is no longer sufficient.
ULVAC released the HELIOT 900 series leak detectors in June 2014 with backing pump up to 250/300 (50 Hz/60 Hz) L/min).
For example, in vacuum packaging situations, production and packing speeds will decline due to reduced air flow through the pump, with poorer end pressure and interaction between the backing pump and booster arrangements that are so often used in such applications.
The overall long-term maintenance on the system was greatly reduced versus the mass spectrometer vacuum system because the Falcon Leak Test System does not have a vacuum chamber, a chamber vacuum pump, a mass spectrometer instrument, or a backing pump for the mass spectrometer.
The SSTC utilizes an oilless diaphragm roughing or backing pump and an oilless turbomolecular high vacuum pump.
It combines a high-performance wide-range turbomolecular pump with a dual-stage oil-free backing pump, and a power supply in one compact package.
Due to the unique oil-free hybrid bearing P design of the new turbo pumps featured in these systems, and by using different dry compressing backing pump combinations, hydrocarbon free pump system operation is guaranteed.
ULVAC launches the ceramic ball bearing turbo molecular pump, UTM300B, in addition to the existing line-up, small size pivot bearing type, medium and large size magnetic levitation turbo molecular pumps, to meet to the requirements such as free mounting orientation, more compact design, smaller size backing pump, etc in the trend of diversified applications of turbo molecular pumps.
All the pumps can be fitted with a standard inverter to control pump speed, allowing them to be started from atmospheric pressure at the same time as the backing pump.
ULVAC developed this leak detector to address the vacuum industry requirement for a portable, helium leak detector that uses a dry backing pump in place of the traditional oil sealed, rotary vacuum pump.