Piston PumpsWOB-L® 2581

Standard Duty Piston Pump

Effective for standard duty applications, not strongly acidic, basic or organic vapors
Lightweight, compact piston pump
Comes with inlet liquid trap, vacuum regulator and muffler(only models 2581B-50 and 2581C-50)
Oil-free operation for reduced maintenance
High water vapor tolerance
Available in 115V/60Hz(251B-24 and 2581B-50) and 230V/50Hz(2581C-24 and 2581C-50)
Free air displacement @60Hz: 3.5 cfm (100 L/min)
Free air displacement @50Hz: 5.0m3/h (183 L/min)
Ultimate pressure: 5 Torr (6.7 mbar)

The WOB-L® 2581 dry piston pump is ideal for pumping water vapor, and for applications with vacuum requirements above 6.7 mbar. The pump provides continuous, reliable, high flow vacuum. It is light and compact. Its oil-free operation reduces maintenance. Pump comes with inlet liquid trap, mounted vacuum gauge and vacuum regulator.

Note: pump is not recommended for pumping organic, acidic and basic vapors.

Model Number	2515B-75-del	2534	2595	2567	2562	2580	2563	8150	2546	2581	2585	2561	2522
Weight	14.8	11.7	22.5	16.7	16.7	22.5	16.7	64	13.8	24.5	24.5	16.7	11.7
Dimensions, LxWxH, in (mm)	330.2x226.06x607.06	210x220x250	1016x594x686	380x250x250	430x190x310	340x200x300	440x170x270	813x432x681	250x190x80	430x420x190	430x420x190	440x170x270	210x220x250
Tubing Needed, I.D. in. (mm)	-	1/4	-	1/4 (7)	3/8 (10)	3/8 (10)	1/4 (7)	-	1/4	1/4 (7)	1/4 (7)	1/4 (7)	1/4
Maximum Pressure	-	50	-	-	-	-	-	-	100	-	-	-	100
Ultimate Pressure	-	60-120	10-60	10-60	0-10	0-10	0-10	10-60	10-60	5	60	0-10	60-120
115V Order Number	-	2534B-01	-	2567B-50	2562B-01	2580B-01	2563B-24	-	2546B-01	2581B-50	2585B-50	2561B-50	2522B-01
Exhaust Connection	-	3/16 (5)	-	1/4	1/4	3/8	NW16	-	1/4 (7)	3/8	3/8	1/4	3/16 (5)
Free Air Displacement	-	1.2 (34)	-	3.5 (100)	2.3 (65)	3.5 (100)	2.3 (65)	-	1.6 (45)	3.5 (100)	7.1 (201)	2.3 (65)	0.76 (22)
Motor Power, HP (kW) at 60 Hz	-	1/8 (0.1)	-	1/3 (0.25)	1/3 (0.25)	1/3 (0.25)	1/3 (0.25)	-	1/4 (0.19)	1/3 (0.25)	1/3 (0.25)	1/3 (0.25)	1/8 (0.1)

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Piston PumpsWOB-L® 2581

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