Pump

VACUUM PUMP

DIAPHRAGM PUMP (Dry Pump)

Suitable For GRFE 5 and 20

DryFast is the latest range of the cost effective and chemical resistant diaphragm pump from WELCH Vacuum products.

This two stage diaphragm pump would be an excellent choice for a wide range of laboratory vacuum applications like distillation, drying, concentration, filtration and aspiration etc. DryFast would be your ecological chemical resistant diaphragm pump for various labscientific applications. DryFast can provide turnable vacuum to <8 mbar.

Functional Benefits:

1. Able to support a wide of chemical applications
2. Uses extra coated layers of PTFE liner for diaphragm, thus making it more robust
3. Dry running operation, Eco –friendly and low maintenance
4. Lightweight, durable, most suitable for 24×7 of continuous operation
5. Equipped with an adjustable control valve, precise settings of the flow and vacuum is easily achieved

Key applications:

 

1. 5-20 Liter Rotary Evaporation
2. Vacuum Oven
3. Vacuum Distillation
4. Vacuum Network
5. Vacuum Concentrator
6. Gel Dryer
7. Degassing Desiccation
8. Aspiration
9. Vacuum Filtration

 

PARAMETER
DRYFAST ECO
Free Air Displacement @50 Hz

33 L/min

Ultimate Pressure

< 8 mbar

Tubing Needed (ID)

9 mm

Power

230 50/60 Hz

Weight

9 Kg

Oil Sealed VACUUM PUMP

These are oil-immersed, Rotary vane type pumps. The rotor, with two spring loaded vanes is mounted ecentric in the stator body, as the rotor rotates, the when’s sweep the crecente shape air spacer twice in each revolution. There is in built non-return valve which prevents backflow of air. Manufactured from graded material/ all moving parts are precisely machined/ ground and assembled with close tolerances. this results in increased efficiency and long trouble free operating life

 

Accessories

 

1. moisture trip. Inlet dust filter. Vacuum gauge with regulator. trolley for small pumps
2. Use oil : ENCLO-46 (HP) SAE-30 or equivalent, vacuum oil
3. vacuum measured by mcleod gauge at suction port of the pump

 

Applications

 

Distillation, dehydration and filtration processes existing electronic tubes, GLS lamps/ mercury vapor lamps and tubes, vacuum methodology, vacuum sublimation, vacuum impregnation, thin film coating, refrigerator and air conditioner servicing

 

Rotary Evaporator Model
Vacuum Pump MODEL NO.
No. OF STAGES
FREE AIR DISPLACEMENT
Lt. / Min. | C.F.M
ULTIMATE VACUUM mm of Hg.
DRIVE MOTOR REQD H. P.
APPROX. OIL FILLING Ltrs.
GRFE 5

HL -50

2

50 | 1.8

0.005

0.25

2

GRFE 20 /GRFE 10

HL -100

2

100 | 3.5

0.005

0.5

3

GRFE 50

HL -150

2

150 | 5.3

0.005

1

4

GRFE 100

HL – 300

2

300 | 10.6

0.005

1.5

8