WELCH 2047B Dryfast Diaphragm Vacuum Pump 2.5 CFM, 28.5 HG, 115V

Product Code WELCH-2047B-01

AvailabilityIn stock

Unit price
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Specifications & Description
Head ConfigurationDual Heads
Wetted PartsPTFE, Kalrez®
Free-Air Capacity (CFM)2.5
Free-Air Capacity (LPM)70.8
Free-Air Capacity (LPH)4248
Max Flow Rate (CFM)2.45
Max Flow Rate (Liters/min)70
Max Vacuum (in Hg)28.5
Max Vacuum (mbar)48.1
Max Vacuum (mm Hg)36.1
Max Vacuum (torr)36.1
Noise Level (dB)53
Port Size1/4" hose barb
Max Temperature (° F)104
Max Temperature (° C)40
Duty CycleContinuous
Power (VAC)115
Power (amps)2.65
Power (Hz)60
Height (in)8.875
Length (in)13.875
Height (cm)22.54
Length (cm)35.24
Height (mm)225.4
Length (mm)352.4
Motor hp1/4
DescriptionVacuum Pump, PTFE, High Flow, 70 L/min, 115V

For Floor Model Rotovaps up to 50 L
capacity. Strip Ethanol or Water at
fastest rates even at Room Temperature.
Add Welch #700458 Regulator/Gauge (see below)
for friendly and precise and steady vacuum control.
This regulator also helps keep valves clear so all
runs during daily operation have maximized stripping.
For longest membrane life, finish each run with a
5-minute air purge

Local Delivery

We offer delivery services for large orders to customers from Central California all the way to San Diego. Please call our sales team for more information on weekly, bi-weekly, or monthly deliveries and pricing. 626.332.7744

Shipping Time

Our main warehouse is located near Los Angeles, you can use the map below to estimate delivery time. Most orders ship one business day after the order is placed, then the transit days will follow. Below the map you will find exceptions to these rules for certain products.

Some items we sell may be warehoused in Amazon's warehouses across the US. If the item you order happens to be in on of their warehouses it will generally arrive in 3 days. If you need to know about a specific item please feel free to contact us and we'll let you know.

Larger and heavier items have to be shipped via LTL Freight. LTL shipments tend to take longer to arrive, but they have the benefit of being much safer for heavy and delicate items. If your order has to be shipped by LTL Freight we will contact you to find out if the delivery address is a residential or commercial address, and whether a loading dock or forklift is available. The freight company will call you to arrange a delivery appointment, usually a day before.


Shipping Costs

The cost of shipping varies based on where you live, how much the order weighs, and the value of the order. We've outline our shipping guidelines below:


To Contiguous US:

  • Orders over $100 ship free
  • Orders $99.99 and under are a $10 flat fee


To Alaska, Hawaii, and other US Territories:

 Cost will be calculated by weight at time of checkout.



To Other Countries:

We currently only offer shipping to addresses within the US. However, you can utilize our shipping partner Shipito to forward the package to you. View Details Here

WELCH 2047B Dryfast Diaphragm Vacuum Pump 2.5 CFM, 28.5 HG, 115V

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