Pfeiffer Vacuum HENA 201, Руководство по эксплуатации

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3.1.2 Operating fluid return via the float valve
Function of the operating fluid return
The operating fluid return functions only at an operating pressure of < 800 hPa.
The vacuum pumps are equipped with an operating fluid return as standard. If the operating fluid col-
lected in the operating fluid separator reaches a certain level, a float valve opens and the ejected oper-
ating fluid is returned to the intake port of the vacuum pump.
3.1.3 Cooling
The vacuum pump is cooled by heat radiation from its surface, the air flow of the two fan impellers and
by the pumped gas.
In case of thermally unfavorable ambient conditions, Pfeiffer Vacuum recommends the use of a pump
version with oil/water heat exchanger. The oil/water heater is installed at the factory. The oil/water heat
exchanger cannot be retrofitted.
● Air cooling (standard)
● Oil/water heat exchanger (optional)
3.1.4 Gas ballast
An integrated gas ballast system serves the controlled supply of ambient air or inert gas into the suction
chamber. Gas ballast supports the reduction of condensate accumulating in the pumping system.
3.2 Identifying the product
► To ensure clear identification of the product when communicating with Pfeiffer Vacuum, always
keep all of the information on the rating plate to hand.
► Observe the motor-specific data on the motor rating plate attached separately.
3.3 Product features
Pump type Characteristics
Hena 201 ● Nominal pumping speed 200 – 240 m
3 /h
Hena 251 ● Nominal pumping speed 250 – 300 m 3 /h
Hena 301 ● Nominal pumping speed 300 – 360 m
3 /h
● Oil/water heat exchanger (optional)
Hena 301 S ● Nominal pumping speed 300 – 360 m 3
/h
● Limited intake pressure
● 3 exhaust filters
● max. continuous intake pressure ≤ 100 hPa
Tbl. 4: Features of the rotary vane pumps
3.4 Scope of delivery
● Rotary vane vacuum pump with motor
● Operating fluid
● Locking caps for vacuum and exhaust connection
● Operating instructions
Product description
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