New Agilent Varian DS 42 Dual Stage Rotary Vane Pump, 100 - 110 V, 9499308
Overview:
The Agilent Varian DS42 is a dual-stage, rotary vane pump oil sealed, driven by a single-phase electric motor.
This vacuum pump is suitable for pumping non corrosive gases.
Main features of the pump:
- all materials are carefully selected to provide extended life
- a high capacity gas ballast device allow to pump condensable vapors
- all the parts composing the pump are fully replaceable due to the close machining tolerances and to the centering obtained by using reference pins
- due to its design features and low number of gaskets, the pump requires little maintenance, disassembly and reassemble are easy and require minimal time
The pump works with force-feed lubrication, provided by an auxiliary gear-pump driven by the rotor of the vacuum pump itself. This ensures proper lubrication even when pressures are close to atmospheric.
The entire pump functional block is immersed in the oil contained in the casing. The oil guarantees perfect sealing of the discharge valves, enters the pump to ensure lubrication and sealing of the parts inside, facilitates heat dissipation and reduces pump noise.
The pump is equipped with a special anti-suckback device which automatically isolates the vacuum system when the pump stops. This avoids rises in pressure or oil flow in the vacuum system while air is allowed back into the stator chambers.
There is one oil seal on the rotor shaft, preventing oil from seeping out of the pump. This seal acts on a bushing fitted onto the shaft.
The vacuum pumps are connected directly to the electric motor through a flexible coupling, so that motion is transmitted even in case of poor alignment.
Lubrication:
The pump’s lubricating system is force-feed type. Oil circulation is obtained by means of a gear pump connected to the rotor shaft.
The required flow of oil under pressure passes through ducts that are drilled in the walls of the pump and lubricates the bushings and the inside parts.
Vacuum Seals:
The seals in the circuit are obtained by means of VITON gaskets. Sealing of the rotor shaft is guaranteed by a rotating gasket with dustguard lip.
The suction flange and duct are sealed by mean of OR gaskets.
Gas Ballast Valve:
When the pump sucks in vapors, these condense during compression and mix with the oil, forming an emulsion (an aqueous vapor, for example) or a solution (organic solvent vapors, for example).
A number of problems arise from this, such as the impossibility of obtaining high vacuums, the alteration of the properties of the oil, could cause scaling on parts of the pump.
To avoid this, during compression at the second stage, atmospheric air is let into the pump through an adjustable valve, or “gas ballast valve”, located at the top of the pump.
In this way, the discharge valve of the second stage opens through the effect of the atmospheric air before the partial pressure of the vapor reaches saturation point, thus preventing condensation from occurring. The vapors are expelled mixed with air.
Technical Data:
Free Air Displacement (l/min): 45.5
Pumping Speed (cfm): 1.2
Ultimate Pressure (mbar): 4 x 10-3
Rotational Speed (rpm): 2280
Inlet Flange: DN 16
Exhaust Flange: DN 16
Unit is NEW and comes with a FULL 3-MONTH WARRANTY!
PN00860
AJVS Service and Repair Information:
Agilent Varian DS 42 Dual Stage Rotary Vane Pump Repair
A & J Vacuum Services provides repair service for all types of High Vacuum equipment. We perform Turbomolecular Pump repair, Turbo Pump Repair, Dry Pump repair, Vacuum Pump repair, Mass Spectrometer repair, Rotary Vane Pump repair, Vacuum Booster repair, and Leak detector repair. Our highly trained technicians have years of experience and guarantee the highest quality service. Due to our confidence in the quality parts and service we guarantee 6-12 month warranty for parts and labor.
We operate at our own full service repair facility in Clifton, NJ. We have invested in state-of-the-art equipment including; complete line of decontamination, cleaning, drying, balancing, vibration analysis and software to minimize failures. Our in-house machine shop is capable of machining various components, prototypes and housing conversions as needed.
We support all major manufacturers including Pfeiffer Vacuum, Alcatel / Adixen, Edwards Vacuum, Varian, Oerlikon / Leybod Vacuum, Vacuubrand, and Agilent Technologies.
Repair Steps
- Full incoming inspection and run up time check, vibration check, drive inspection.
- Full disassembly, decontamination and cleaning.
- Pump is balanced utilizing state-of-the-art equipment from the world leader in equipment balancing and analysis to reduce noise and vibrations and extend bearings life.
- Assembly and replacement of all necessary parts such as shafts, bushings, bearings, sleeves, O-rings, gaskets, seals, wicks, etc. Only parts that meet or surpass OEM specifications are used to ensure dependable highest quality service and long pump life.
- Final test and leak check. The pump in fully assembled condition is checked for vacuum seal. Leak test to 1 x 10-9 Mbar l/s. Vibrations are analyzed and test data is digitally recorded.
Every pump and instrument is extensively tested for 48 hours. During our final tests, we monitor total pressure, temperature, vibration and noise level utilizing newest testing technologies and techniques specified by OEM. Upon request, we can provide our customers with a pump down graph. Call us for your free repair estimate at 1-973-249-0854.
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