KSM 2000 OIL DIFFUSION EJECTOR PUMP

Features

Applications

The KSM-2000 is a three stage high vacuum (10^-3 to 10^-4 Torr range) vapor pump designed for heavy gas load applications such as in vacuum distillation, evaporation, vacuum arc melting, freeze drying, impregnation and casting of metals. The pump has no moving parts which may be corroded by the acidic nature of the material being pumped. These pumps may be used in place of mechanical roots type blower pumps.

Description 

The KSM-2000 is a three stage vapor pump whose diffusion and ejector nozzles are supplied from a common electrically heated boiler.

Two umbrella type vapor stages, positioned in the vertical column, have nozzles through which jets of vapor are emitted to entrain the gas entering the pump inlet. The compressed gas is then passed on to the ejector stage in the horizontal convergent divergent arm of the pump.

The pump achieves a peak operating pumping speed of 2500 liters/second at 10^-3 Torr and has an ultimate pressure in the 10^-4 Torr range. The ejector stage is operated at a sufficiently high boiler pressure to handle gas loads in the 10^-1 Torr pressure range and also provides a forepressure tolerance of greater than 1 Torr.

The pump comes equipped with water-cooling lines with disconnect fittings and vacuum flanges which allows for easy maintenance disassembly. On board oil temperature and oil level indicators allow for ease of system monitoring during operation. Quench lines in the boiler provide rapid cooling of oil when systems operation is stopped (these connections are standard ¾" allowing for use of standard water hoses for temporary connection when needed). The external boiler which supplies the vapor is equipped with replaceable blade type immersion heaters.

An optional thermal jacket is available for the boiler housing. This will reduce heat loss and power consumption during operation. It is attached using high temperature Velcro strips. This allows for easy removal to avoid contamination by cleaning solvents and oil during maintenance.

Specifications

Inlet connection	Flange
- O.D.	19"
- I.D.	12"
- Thickness	1-1/4"
- Bolt circle	17"
- No. of holes	12
- Hole diameter	1"
- Gasket Groove O.D.	13-3/4"
- Gasket Groove I.D.	13"
Outlet connection	Flange
- O.D.	9"
- I.D.	3-7/8"
- Thickness	5/8"
- Bolt circle	7-1/2"
- No. of holes	8
- Hole diameter	3/4"
- Gasket Groove O.D.	6-1/8"
- Gasket Groove I.D.	5-3/8"
Cooling Connections	3/8" FPT (Boiler is 3/4"FPT)
Mounting Holes	4-1" dia. on 24x20" centers
Maximum Width	28-3/4 st sight glass
Space for heater removal	38"
Heater Voltage (Rated)	240, 480, or 550v, 3ph.(as requested by customer)
Heater Wattage (Rated)	12000w
Pump Fluid (Quantity)	10 gal.
Net weight	780 lbs.
Shipping weight	930 lbs.
Recommended backing pump speed	130 cfm
Plateau speed (liters per second)	2500
Typical air throughput In pumpdown range (Torr-liters per second)	40
Backing speed required for highest throughput time (cfm)	300
Warm-up time (minutes)	60
Cooling water - temp. º in	20
Cooling water - temp. º out	45-55
Nominal cooling rate (gallons per minute)	1.5
Recommended forepump (cfm)	220
Cool-down time to 100º C (using quench coils)	60
All data obtained with Convoil-20 pump fluid. Pumping speed measured with Convoil 20 diffusion pump.

Ordering information for the components mentioned
on this page is listed below.

ITEM	DESCRIPTION	P/N
KSM-2000	Diffusion ejector pump cr. stl., water-cooled 3ø, 12KW, 230V. Immersion heater.	500385
KSM-2000	Jet assembly	500361
Replacement heaters	for KSM-2000, 240/480V, 12 KW, 3 Phase On 6" ASA Flange	500375
Insulation Jacket	Removeable Thermal Jacket for boiler housing	500383