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The Edwards EH4200 is a Roots pump (Roots booster) with a pumping capacity of 4140 m³/h at 50 Hz (4985 m³/h at 60 Hz). The hydrokinetic drive allows operation from atmospheric pressure without a pressure switch or bypass. Ehrler & Beck advises on selection, backing pump and service.
Edwards EH4200 – Roots pump with hydrokinetic drive
The EH4200 belongs to Edwards' EH series of mechanical boosters (250 to 4200 m³/h). It has a pumping capacity of 4140 m³/h at 50 Hz and 4985 m³/h at 60 Hz and is combined with a suitable backing pump to improve the pumping speed and ultimate pressure of a system. The motor delivers 11 kW; the pump weighs 403 kg and is water-cooled.
Hydrokinetic drive
The motor drives one of the rotors via a fluid coupling. At a high gas load the speed of the rotors drops; as the gas load decreases they accelerate to full speed. The pump can thus be operated from atmospheric pressure over the whole vacuum range without overloading the motor – pressure switches, bypass lines or frequency converters are not needed. This limits the differential pressure across the pump, on the EH4200 to 0–70 mbar at 50 Hz and 0–50 mbar at 60 Hz.
Typical applications
Edwards names, among others, semiconductor manufacturing, thin-film coating, vacuum impregnation, vacuum distillation, vacuum metallurgy, oil drying and degassing, vacuum packaging, low-density wind tunnels, pharmaceutical freeze drying, steel degassing, space simulation and CO₂ lasers.
Versions of the Edwards EH4200
The EH4200 is available as an HC version for hydrocarbon oil (oil included) and as a PFPE-prepared FX version (oil separate), each with IE3 motor for 380/400 V 50 Hz (Europe/China), 230/460 V 60 Hz (USA), 200 V 50 Hz and 200/380 V 60 Hz (Asia). The market details come from the Edwards webshop. The standard pumps are not azide-compatible, because cooling coils made of copper that come into contact with the process are fitted.
Advice and service
Ehrler & Beck supports you in selecting the right combination of backing pump and booster, supplies oil and spare parts and carries out maintenance and repair.
Pumping speed 50Hz
4,140
Pumping speed 60Hz
4,985
Rated motor power 50Hz
11
Rated motor power 60Hz
11
Motor efficiency class
IE3
Weight
403
Length
133.6
Width
52.2
Height
47.9
Inlet connection flange
ISO250
Outlet connection flange
ISO100
Noise level
75 dB(A)
Cooling method
Water cooling
Oil type
Ultragrade 20, XTRAGRADE ADVANCED 168
Additional technical data
Technical data
Value
Design
Roots vacuum pump with hydrokinetic drive, water-cooled
Version
HC (hydrocarbon oil): 3Ph 200 V 50 Hz, IE3 (Asia)
Pumping capacity (displacement) 50 Hz / 60 Hz
4140 / 4985 m³/h
Max. differential pressure (limited by the hydrokinetic drive) 50 Hz / 60 Hz
0–70 / 0–50 mbar
Max. outlet pressure
1000 mbar absolute
Speed 50 Hz / 60 Hz
0–2900 / 0–3500 min⁻¹
Motor power
11 kW (50 and 60 Hz)
Motor efficiency class
IE3
Sound pressure level (1 m, < 0.1 mbar, 50 Hz)
75 dB(A); at 60 Hz or a higher inlet pressure approx. 5 dB(A) more
Mass
403 kg
Dimensions L × W × H
1336 × 522 × 479 mm
Connections, inlet/outlet side
ISO250 / ISO100
Oil
Ultragrade 20
Oil fillings
Gear cover 3.5 l, hydrokinetic drive/gearbox 6.5 l, shaft seal reservoir 0.45 l
Ambient temperature (operation)
−8 to 40 °C
Type of protection
IP55
Cooling water
recommended 6 l/min at 20 °C, 2–6 bar gauge, 5–35 °C, connections 3/8" BSPP (male thread)
Product name
Part number
Ultragrade 20, 1 litres (HC versions)
H11024015
Ultragrade 20, 4 litres (HC versions)
H11024013
Fomblin grease AR555, tube 100 g (EH250FX/EH500FX)
Edwards EH250Pumping speed 310 m³/h
Edwards EH500Pumping speed 505 m³/h
Edwards EH1200Pumping speed 1,195 m³/h
Edwards EH2600Pumping speed 2,590 m³/h
