EH4200C 230/460V, 3-ph, 60Hz, 15 hp

The EH mechanical booster pumps feature the unique hydrokinetic drive, providing an efficient power transmission with benefits in economy, performance and compactness. The hydrokinetic drive provides pump down times cut by 50%, when compared with direct drive pumps, no bypass lines or pressure switches required, universal voltage motors, reduced capital and operating costs, air cooled motors – with water cooled options, and quiet, minimum vibration.

 The EH mechanical booster pumps, based on the simple Roots principle, remain the favourite pumps for applications where high pumping speeds over 3000 m³h^‑1/1776 ft³min^-1 are required in the pressure region of 0.01 to 50 mbar/0.0075 to 37.5 Torr. These must always be backed by another pump which can deliver against a high pressure differential to atmospheric pressure. Operating at relatively low pressures, the mechanical booster pump is not exposed to the same concentrations of corrosive process media as is the backing pump, which makes it highly reliable.

EH pumps with hydrokinetic drive

EH booster pumps have a unique and patented hydrokinetic fluid drive, which couples the motor to the pumping mechanism. The hydrokinetic drive offers the following advantages:

• Pump down times cut by up to 50%
  
• Reduced capital and operating costs
  
• No pressure sensors, by-pass lines or valves
  
• Can operate continuously at all pressures when used with a backing pump

EH booster pumps have universal voltage, air-cooled motors and are available with effective pumping speeds (at 50 Hz) of up to 3100 m³h^-1. The pump bodies of the EH1200, EH2600 and EH4200 pumps are water-cooled.

Pump-down times cut by up to 50%

The hydrokinetic drive allows the booster pump to be started at the same time as the backing pump (at atmospheric pressure) as it prevents motor overload. The EH booster pump therefore assists the pumping process from the start of pump-down. In comparison pumping systems with conventional, direct drive mechanical booster pumps (where the booster pump is switched on when the chamber pressure has been reduced to, typically, less than 10 mbar), the total evacuation time can be reduced by as much as 50%.

Automatic overload protection

The hydrokinetic drive automatically varies the rotational speed of the pump. This protects the motor from overload, prevents over-heating, and allows the pump to operate with high-pressure differentials. Consequently, EH booster pumps are not damaged by sudden increases of inlet pressure and even by the entry of solid debris into the pump.

Important cost savings

When you use EH mechanical booster pumps, you save money on installation and operation. Your capital costs are reduced as you do not need valves, by-pass lines and pressure switches, and you can use a smaller backing pump than with conventional drive booster pumps. Operation costs are reduced because EH booster pumps have smaller motors than direct drive pumps and, when operating at full speed, they use only a fraction of the rated power.

• Semiconductor processing
• Vacuum distillation
• Vacuum packaging
• Steel de-gassing
• Thin film coating
• Vacuum metallurgy
• Low density wind tunnels
• Space simulation
• Vacuum impregnation
• Oil drying and de-gassing
• Pharmaceutical freeze drying
• CO2 lasers
• Industrial freeze drying

-  Performance – fast pump down time due to unique hydrokinetic drive.
-  Increased productivity – faster pump down time.
-  More performance for less – larger displacement than equivalent competitor models.
-  Stable operation – optimised clearances and after coolers.
-  Simplicity – Continuous operation at all pressures.
-  Simple installation – no need for pressure switches, bypass lines or variable frequency drives.
-  Reliability – automatic overload protection, reliable shaft seal design.
-  Safe operation – automatic overload protection.
-  Robust operation even for harsh duties – proven shaft seal design to protect pumping mechanism and gearbox from cross-contamination.
-  High uptime and low maintenance – internal evacuation of gearboxes extends shaft seal life.
-  Reassurance.
-  Peace of mind – industry proven with large installed base.

Displacement (swept volume)
50Hz	4140 m3h-1 / 2440 ft3min-1
60Hz	4985 m3h-1 / 2935 ft3min-1
Effective pumping speed with backing pump
E2M275	3100 m3h-1 / 1825 ft3min-1
Pressure differential across pump
50Hz
HC	0-70 mbar / 0-52 Torr
FX	0-60 mbar / 0-46 Torr
60Hz
HC / FX	0-50 mbar / 0-38 Torr
Inlet connection	ISO250
Outlet connection	ISO100
Rotational speed
50Hz	0-2900 rpm
60Hz	0-3500 rpm
Operating continuous inlet pressure	0-1000 mbar / 0-760 Torr
Maximum outlet pressure	1000 mbar / 760 Torr
Recommended backing pumps	GXS450, E2M275, ES300, ES630, 412J, IDX1000, IDX1300
Motor power
Hydrocarbon	11kW / 15hp
PFPE	11kW / 15hp
ATEX	11kW
Explosion proof	15hp
Ambient temperature range
Operating	5 to 40°C / 40 to 104°F
Storage	-20 to 80°C / 14 to 176°F
Maximum operating humidity	90% RH
Recommended cooling water flow (inlet temperature 20°C)	6 lmin-1
Recommended cooling water supply pressure	2-6 barg
Cooling water connections	3/8 inch BSP male
Recommended oil
Standard version	Ultragrade 20
PFPE version	Fomblin® YVAC 16/6
Oil capacity
Gear case	3.5 litre
Coupling cover	6.5 litre
Shaft seal reservoir	0.45 litre
Weight	485 kg / 1067 lb

Hydrocarbon Prepared – HC
Standard pump for use with Ultragrade oil. Oil supplied with the pump

PFPE Prepared - FX
These pumps are assembled and tested using PFPE fluid. PFPE (Fomblin®) to be purchased separately

	A (mm)
EH4200	1330
EH4200IND	1469

Pump is shown with inlet and outlet blanking flanges fitted. Dimensions are to the top surface of the pump flange.

* Alternative outlet position