Ulvac VD30C, Инструкция по эксплуатации

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YK15-0009-DI-002-04
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2. Pump Outline
2.1 Characteristics
The VD30C, VD40C, VD60C and VD90C are a compact, low noise, two-stage vacuum pump that
permits high speed rotation. Features of this pump include the following:
(1) High maintainability
Pump main body section unit can be dismounted and remounted simply by removing the side
panel when there is no piping on the exhaust side (it is not necessary to disconnect the motor
or remove the piping from the intake port). This facilitates the overhaul of the Pump,
replacement of the oil seal, check of the coupling spider, and others. Also daily check (oil level
check, oil filling, oil change) can be performed from one direction.
Furthermore, as to the way of removing and the way of mounting the Pump main body, refer to
“5.2.8 Inspection for coupling spider”.
(2) Employment of spring less vane
This prevents the Pump from stopping due to breakage of spring.
(3) Employment of lubrication pump system
When in the exhaust operation in the vicinity of the atmospheric pressure, the stable exhaust
performance can be obtained.
(4) Employment of hydraulic oil anti-sucking system
If the power fails or the Pump is stopped for a long time without venting the intake side to
atmospheric pressure, the Pump oil will flow back to the cylinder, making restart difficult.
This pump is equipped with the oil anti-sucking feature to minimize the amount of oil flowing
back to the cylinder and to reduce the load at restart of the Pump.
(5) Employment of variable oil level system
This pump has a wide oil level indicating range to allow easy control of oil level. The Pump is
operable if the oil level is between the two level lines of the oil level gauge during operation.
(6) Employment of gas ballast function
This product is installed with the gas ballast function as standard. When using the gas ballast
function depending on the application, the needle valve, the pipe and the like are connected to
gas ballast port (G3/8). It is applicable to breathe in the condensed gas such as the steam and
solution vapor.
Note : Spec.B and Spec.H don't have the gas ballast function.