Welch 2581B-50 Dry Oil-Free Piston Vacuum Pump

The Welch 2581B-50 Dry Oil-Free Piston Vacuum Pump is designed to deliver reliable vacuum performance for a wide range of laboratory and light industrial applications. Utilizing dry, oil-free WOB-L piston technology, this pump provides strong pumping dynamics while eliminating the need for oil lubrication, helping reduce maintenance and simplify operation. With a maximum pumping speed of 100 L/min and an ultimate pressure of 6.7 mbar, the unit maintains dependable pumping performance across demanding processes such as filtration, aspiration, drying, sampling, and vacuum forming.

The pump features hose nozzle connections (DN 8) for both suction and pressure ports, allowing straightforward integration into existing vacuum setups. Designed for stable operation in laboratory environments, the unit operates quietly at ≤ 56 dB(A), helping maintain a comfortable workspace. Built with a compact footprint and weighing 22.7 lb., the pump is easy to position on a bench or within equipment systems. The Welch 2581B-50 Dry Oil-Free Piston Vacuum Pump provides dependable oil-free vacuum performance for a variety of laboratory filtration, aspiration, and process applications.

All of our equipment is in excellent condition and will be fully tested to perform at factory specifications before being shipped.

Welch 2581B-50 Dry Oil-Free Piston Vacuum Pump Specifications

Maximum Pumping Speed	100 l/min (6 m3/h)
Ultimate Pressure	6.7 mBar
Suction Connection	Hose nozzle DN 8
Pressure Connection	Hose nozzle DN 8
Ambient Operating Temperature	+10°C to +40°C
Max. Operating Gas Temp.	+60°C
Noise Level	≤ 56 dB(A)
Dimensions (W x D x H)	17 x 7.6 x 12 in. (43.2 x 19.1 x 30.5 cm)
Weight	22.7 lb. (10.3 kg)
Electrical Requirements	115V, 60Hz

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