SKU: 78378411903

Welch Vacuum 2546B-01 Standard Duty Pump, 1-Head, 45 LPM, 60 Torr, 115V

Sale price$428.40 Regular price$476.00
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Description

Welch Vacuum 2546B-01 Standard Duty Pump, 1-Head, 45 LPM, 60 Torr, 115VFeatures One head WOB L style piston pump with intake and exhaust catch jars for use in vacuum or pressure applications with gel dryers, concentrators, and rotary evaporators 46 liter per minute (LPM) free air displacement with vacuum to 60 Torr. Manually adjustable vacuum and pressure levels with gauges Oil free pump for operation without oil misting and contaminated oil disposal. 1 4 HP motor accepts 115V, 60Hz input power. Description The Welch

Features

One-head WOB-L-style piston pump with intake and exhaust catch jars for use in vacuum or pressure applications with gel dryers, concentrators, and rotary evaporators 46 liter per minute (LPM) free air displacement with vacuum to 60 Torr.

Manually adjustable vacuum and pressure levels with gauges Oil-free pump for operation without oil misting and contaminated oil disposal. 1/4 HP motor accepts 115V, 60Hz input power.

Description

The Welch Vacuum 2546B-01 one-head WOB-L-style piston pump has an 46 liter per minute (LPM) free air displacement with vacuum to 60 Torr and is suitable for use with gel dryers, concentrators, and rotary evaporators in non-corrosive environments. The vacuum/pressure pump has intake and exhaust catch jars for collecting condensation, vacuum and pressure gauges, and manually adjustable vacuum and pressure levels. It is driven by a 1/4 HP motor that accepts 115V, 60Hz input power. It connects to 3/16" inside diameter vacuum system tubing (sold separately).

Welch-Ilmvac, a subdivision of Denver Gardner, manufactures vacuum pumps, systems, and components for industrial and research applications under the Welch and Ilmvac brand names. Denver Gardner, founded in 1859, is headquartered in Milwaukee, WI.

CLICK HERE TO VIEW THE 2546B-01 MANUAL

EXPLODED VIEW AND REPAIR KITS

Wetted Parts

304 Stainless Steel, Aluminum, PTFE

Free-Air Capacity (CFM)

1.6

Free-Air Capacity (LPM)

45

Free-Air Capacity (LPH)

2700

Max Flow Rate (CFM)

1.58

Max Flow Rate (Liters/min)

45

Max Vacuum (in Hg)

27.6

Max Vacuum (mbar)

78.6

Max Vacuum (mm Hg)

59

Max Vacuum (torr)

59

Port Size

1/4" hose barb

Max Temperature (° F)

104

Max Temperature (° C)

40

Duty Cycle

Continuous

Power (VAC)

115

Power (amps)

3.6

Power (Hz)

60

Motor Type

Permanent split capacitor

Height (in)

10

Length (in)

8

Height (cm)

25.4

Length (cm)

20.32

Height (mm)

254

Length (mm)

203.2

Motor

hp1/4

Description

Standard Duty Dry Vacuum Piston Pumps, 45 L/min, 115 VAC

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78378411903

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4.9 ★★★★★
Based on 6 reviews
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Verified Purchase
sleepywan
Massapequa, US
★★★★★ 3
OK for the price, but overall comfort is avergae
Size: 934-Z, Color: Mustard
Easy to put together, color (mustard) accurate to images, and while I understand this is not a high-end chair, I feel like it still needs to be rated for its quality. Pros: the seat cushions are fairly comfortable and it rolls well. Adjustable footrest is easy enough and mostly sturdy. Cons: For a tall office chair, it doesn't go up high enough. I actually had to lower my standing desk to sit at it, which then isn't where I want it when I'm standing now. It's also a bit wobbly. The seat area's attachment to the post isn't as solid as it should be for a tall chair, so while sitting, it does tend to lean/slope forward and wobble side to side. The lumbar support is not adjustable, so I'm not even really sure what it does. And the armrests are not very comfortable to use. Since they are hard plastic, they are just a bit too rigid to rely on for any comfort. They are basically there to hold on to when you're getting out of the chair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
M
Verified Purchase
Mel
Natrona Heights, US
★★★★★ 4
Good Value for a Tall Chair
Size: 934W-Z, Color: White
I have received this chair just today and would like to give my first impressions of it. Height is super adjustable as well as the foot rest. My desk is very tall (~34 inches vs standard ~29 inches) and does not suit a standard height chair. This chair's height is enough to sit comfortably at mybut also still having adjustment to be even higher. Lumbar support is a manual adjustment that can be adjusted by sliding the lumbar piece up or down and it seems it can be tiled as well. No reclining feature or slight backrest tilt adjustment. I'm used to my chairs reclining so it feels a little awkward siting in a flat base and straight backrest. I feel like I'm sitting too forward or leaning forward slightly but is probably something I can get use to. Easy to put together and feels very sturdy. Plastic parts of chair are made from a really sturdy plastic, like playhouse plastic materials. Wheels roll around carpet easily. Mesh seems to be a strong material, though the mesh feels kind itchy on bare skin. Overall, I think this is a good chair to get if you're needing a tall chair for a good value and can sacrifice no backrest tilt.
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Reviewed in the United States on December 3, 2025
T
Verified Purchase
Tram
Lake Worth, US
★★★★★ 5
Excellent value for money!
Size: 934W-Z, Color: Black, Size: 934W-Z, Color: Black
I absolutely love this office chair! I needed a chair that could support my standing desk without sacrificing comfort, and this one completely exceeded my expectations. It's incredibly sturdy and durable, well-made, and the height adjustment is super convenient, making it easy to find the perfect fit. Even during long hours of work, the seat is comfortable, and the ergonomic design effectively reduces pressure on my back and legs. I love its clean, modern look—it fits my home office perfectly. Assembly was quick and easy, and for this price, the quality is absolutely fantastic!
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Reviewed in the United States on February 24, 2026
L
Verified Purchase
Lisa Bjornstad
Grantham, US
★★★★★ 5
Perfect chair!
Size: 934-Z, Color: Blue, Size: 934-Z, Color: Blue
I have an adjustable-height desk (also purchased from Amazon) and needed a drafting chair for those times when my body gets tired of standing. This chair fits the bill and then some! I put it together myself; it took me about an hour, but would take me about half that next time, since now I know what to do (and what NOT to do!). All the parts were there; there are even spare parts (see photo). All the holes were drilled in exactly the right places, too, which isn't always the case when I buy things from Amazon (my standing desk is a great example). The chair fits me; I'm short (5'3.5"), and often the seats of furniture are too deep for me to rest my feet flat on the floor. The depth of the seat on this chair is just a little over 18 inches, and with the adjustable footrest ring, it's perfect. I don't think a tall or heavy person would fit in it, to be honest. But it's perfect for those of us who are vertically challenged. I love that it glides easily on my hardwood floors and that it turns 360 degrees. The chair comes in numerous luscious colors, so take your pick! It is very sturdy, has good lumbar support, and the seat and seat back are very comfortable. And the arms flip up, which was an absolute must when I was shopping for this chair. I got it on sale, too -- $109.00 -- and I'm delighted with this purchase.
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Reviewed in the United States on April 23, 2026
P
Verified Purchase
PenLady
West Palm Beach, US
★★★★★ 5
Excellent adjustable drafting chair
Size: 934-Z, Color: Blue
Excellent chair design, extremely comfortable and exceptionally easy instructions to follow making for simple assembly. Love the amply wide cushioned seat and ergonomic backrest. The height adjustment feature works perfectly as well as positioning of the foot ring . Having the ability to raise the arms is also a big plus! I highly recommend this product for attractive appearance, comfort features, functionality and operation. Really nice chair!
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Reviewed in the United States on April 13, 2026

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