5
Feature
XtraDry 250-1
XtraDry 150-2
Line-up of the compression
spaces
parallel
series
Inlet connection (flange)
DN 25 ISO-KF
DN 25 ISO-KF
Exhaust flange with
small flange
DN 25 ISO-KF
DN 25 ISO-KF
twice
single
exhaust silencer
standard
standard
Gas ballast valve
yes
yes
Max. volume flow rate
13 m3/h
7,5 m3/h
Ultimate pressure
< 7 mbar
< 0,1 mbar
Speed control
automatically via pressure switch
Description of pump mechanism
The XtraDry is an oil-free vacuum pump, which is based and
operates on the piston principle.
Each compression stage consists of a cylinder in which a
piston reciprocates in a cylinder.
In the XtraDry model 150-2, two compression stages are inter-
nally connected in series. Gas coming from the inlet enters
the compression space of the first piston (stage I). After
compression, the now higher pressure gas enters the
compression space of the second piston (stage II). Once the
gas reaches a pressure slightly above atmosphere it leave
the pump via a one way valve.
The XtraDry model 250-1 consists of two pistons connected in
parallel which during each stroke simultaneously take gas in,
compress it to atmospheric pressure and eject it to
atmosphere.
XtraDry 250-1
XtraDry 150-2
2. Understanding The Pump
2.1. Main Features
2.2. Differences Between The Pump Types
2.3. Delivery
– Piston Pump XtraDry 150-2/250-1
– Exhaust silencer 1/2 piece/s
– Operating Instructions
2
13
14
12
XtraDry
1
Inlet flange
2
Exhaust flange; alternatively exhaust silencer
(two connections in parallel configured pumps)
12 Operating hours counter
13 Mains connection
14 On/Off switch
1
