High Throughput Standard Duty Oil-Free

Powered By An Economical WOB-L Piston

Simplicity is the key to the economical aluminum design. As piston wobbles, air resistance on upward stroke expands Teflon seal on piston to increase its efficiency while compensating for the wobble action.
Non-Corrosive Duty
- Cell harvesting
- Centrifuge
- Filtration
- Aspiration
- Drying
Features
- Vacuum to 4 Torr (29.8, in. Hg)
- Four sizes: 60, 65, 100 L/min
- No water or oil
- Lightweight, compact and quiet
- Continuous oil-free Pumping
Ordering Information1 & Specifications
Pricing is valid only for USA and Canada. All prices are in U.S.
dollars.
| Catalog Number | ||||
|---|---|---|---|---|
| Wired for 115V, 60 Hz 1 PH with N. American 115V Plug |
2567B-01 $985.00 |
2581B-24 $1,905.00 |
2585B-01 $1,465.00 |
|
| Wired for 220V, 50 Hz, 1 PH with Cont. Euro. (Schuko) Plug2 |
2567C-02 $1,005.00 |
2581C-24 $1,905.00 |
2585C-02 $1,465.00 |
|
| Welch Model | 2567 | 2581 | 2585 | |
| Free Air Displacement | ||||
| CFM (L/min) @ 60 Hz | 3.5(100) | 3.5(100) | 7.1(201) | |
| m3/hr (L/min) @ 50 Hz | 4.9(83) | 5.0(83) | 10(168) | |
| Max. Vacuum, in. Hg | 27.6 | 29.8 | 27.6 | |
| Ultimate Pressure, Torr (mbar) |
60(80) | 4(5) | 60(80) | |
| Stages | 2 | 2 | 2 | |
| Tubing Needed, I.D., in.(mm) |
3/8(10) | 3/8(10) | 3/8(10) | |
| Weight, lbs (kg) |
16.5(7.5) | 22.5(10.3) | 22.5(10.3) | |
| Dimensions (LxWxH), in. |
11.7.22x9.5 | 13.2x7.6x11.7 | 13.2x7.6x11.7 | |
| Ship Weight, lbs (kg) |
18(8.2) | 30(13.6) | 30(13.6) | |
- All pumps supplied with an exhaust muffler and an installed intake hose barb.
- 50Hz models provided with CE marking.
HIGH THROUGHPUT STANDARD DUTY Pump Accessories
Exhaust Silencer



Exhaust silencers are insalled in the exhaust port of the pump to reduce pump noise.
| Exhaust Silencer | ||||
|---|---|---|---|---|
| Cat. No. | 1412C $28.25 |
1412D $50.50 ; |
1412E $51.40 |
1412B $34.40 |
| Pump Model | 2565, 2585 | 2561 | 2581 | 2012, 2022, 2030, 2015, 2017 |
Replacement Jars
Plastic (1415C) or glass jar (1415B) to replace the collection jar included with the pumps.
| Replacement Jars | ||
|---|---|---|
| Cat. No. | 1415C $21.70 |
1415B $21.70 ; |
| Pump Model | 2522, 2535, 2545, 2534 | 2561,2565,2581,2585,202501,202601,202701 |
Dial Vacuum Gauge

Inexpensive gauge for measuring vacuum level. Not an absolute pressure gauge.
| Dial Vacuum Gauge | ||||
|---|---|---|---|---|
| Cat. No. | 726021 $42.90 |
; | 726020 $81.60 |
|
| Dial Diameter | 2 in. O.D | 2 in. O.D. | 2 1/2 in.O.D. | 2 in. O.D. |
| Unit of Measure | in. Hg, cm Hg (brass) | Pascal (Brass) | in. Hg, mm Hg (Brass) | in. Hg, mm Hg (stainless) |
| Connection | 1/8" male NPT | 1/8" male NPT | 1/4" male NPT | 1/8" male NPT |







