Welch Direct Drive Vacuum Pump

$3,950.00

This Direct Drive Pump (also known as a direct drive vacuum pump) is driven by an electric motor.

These pumps can achieve a deep vacuum, and they are affordably priced relative to their extreme value.

Product Information

This Direct Drive Pump (also known as a direct drive vacuum pump) is driven by an electric motor.

These pumps can achieve a deep vacuum, and they are affordably priced relative to their extreme value.

A simpler design for greater efficiency.

The pump’s motor spins at a constant speed based on the type of motor used. Unlike a belt driven vacuum pump, these motors are directly connected to the driveshaft of the unit.

In general, electric motors usually spin the pump at either 3450 RPM or 1725 RPM. The simplistic design of these pumps helps contribute to their reduced cost, and maintenance is somewhat simpler than on some other, more complicated models.

Perform regular maintenance to keep your pump running for years to come.

Maintenance should be carried out on the pump based on user manual guidelines, which will greatly contribute to the longevity of the pump. Some sample applications for direct drive pumps are Vacuum Ovens, Freeze Dryers, Centrifugal Concentrators, and more.

These Welch pumps can maintain a deep vacuum while remaining portable down to .1 micron, and they have an 11.3 CFM flow rate.

See the advantages of a direct drive vacuum pump.

A direct drive pump is a crucial piece of equipment for any lab, and they are not cheap. That is why we recommend a cold trap when using this pump to prevent condensation of contaminants building up inside. Despite the cost, it is an enormously beneficial piece of equipment for many laboratories.

Need help choosing the right pump?

Have a look at our Vacuum Pump Buyer’s Guide. If you are still having trouble selecting please feel free to call us and we will guide you through the process. Feel free to browse our catalog to get a sense of the benefits and drawbacks of different types of vacuum pump models, as there are many clear trade-offs to consider when making the final decision for your own lab.

Note: This direct drive pump is not meant for aspiration, filtration or other applications requiring operation above 30 torr. 

System Specifications

Model: 8925

Pump Stats

Power 115v, 60 Hz, 1 phase,  N. American Plug
CFM (L/Min) 11.3 (320)
Max vacuum Torr 0.001
Motor horsepower (watts) 3/4ths (560W)
Tubing (mm) 9/16, 13/16 (14, 20)
Ultimate pressure  Torr (mbar) 4 x 10^-4(0.00053)
Type of pump Laboratory Vacuum
Exhaust Thread NPT 1-20 thread
Intake thread NPT UNIBARB (1-1/8-20)
Gas Ballast  Yes

Applications

Centrifugal concentrators Medium to large size
Vacuum ovens Medium to large size
Freeze dryers  Medium to large size

Shipping

Weight (Kg) 63 (31.3)
Shipping Weight (Kg) 77 (34.6)
Unit dimensions (cm) 22 x 7.1 x 11"(56.4 x 17.9 x 27.9)
Shipping dimensions (cm) 29 x 10 x 14" (73.7 x 25.4 x 35.6)
 

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