{"product_id":"welch-2581b-50-dry-oil-free-piston-vacuum-pump","title":"Welch 2581B-50 Dry Oil-Free Piston Vacuum Pump","description":"\u003cdiv class=\"productdescriptiontables\"\u003e\n\t\u003ch1\u003eWelch 2581B-50 Dry Oil-Free Piston Vacuum Pump\u003c\/h1\u003e\n\t\u003cbr\u003e\u003cbr\u003e\n\t\u003cdiv class=\"highlights-divider\"\u003e\n\t\u003c\/div\u003e\n\t\u003cdiv class=\"highlights-section\"\u003e\n\t\t\u003cdiv class=\"inner-highlight-div\"\u003e\n\t\t\t\u003cp class=\"inner-highlight\"\u003e\n\t\t\t\t\u003cb\u003eMaximum Pumping Speed\n\t\t\t\t\u003c\/b\u003e\u003cbr\u003e\t100 l\/min (6 m\u003csup\u003e3\u003c\/sup\u003e\/h)\n\t\t\t\u003c\/p\u003e\n\t\t\u003c\/div\u003e\n\t\t\u003cdiv class=\"inner-highlight-div\"\u003e\n\t\t\t\u003cp class=\"inner-highlight\"\u003e\n\t\t\t\t\u003cb\u003eUltimate Pressure\u003c\/b\u003e\u003cbr\u003e\t6.7 mBar\n\t\t\t\u003c\/p\u003e\n\t\t\u003c\/div\u003e\n\t\t\u003cdiv class=\"inner-highlight-div\"\u003e\n\t\t\t\u003cp class=\"inner-highlight\"\u003e\n\t\t\t\t\u003cb\u003eSuction \/ Pressure Connection\n\t\t\t\t\u003c\/b\u003e\u003cbr\u003e\tHose nozzle DN 8\n\t\t\t\u003c\/p\u003e\n\t\t\u003c\/div\u003e\n\t\u003c\/div\u003e\n\t\u003cdiv class=\"highlights-divider\"\u003e\n\t\u003c\/div\u003e\n\t\u003cdiv class=\"features-section\"\u003e\n\t\t\u003cdiv class=\"features-side\"\u003e\n\t\t\t\u003cspan class=\"features-header\"\u003eFeatures\u003c\/span\u003e\n\t\t\t\u003cul\u003e\n\t\t\t\t\u003cli\u003eOil-free WOB-L piston technology eliminates oil contamination and reduces maintenance requirements\u003c\/li\u003e\n\t\t\t\t\u003cli\u003eDesigned for dependable vacuum performance across filtration, aspiration, drying, and sampling applications\u003c\/li\u003e\n\t\t\t\t\u003cli\u003eStrong pumping dynamics maintain consistent performance across rough vacuum processes\u003c\/li\u003e\n\t\t\t\t\u003cli\u003eCompact benchtop design fits easily into laboratory or equipment setups\u003c\/li\u003e\n\t\t\t\t\u003cli\u003eQuiet operation helps maintain a comfortable laboratory environment\u003c\/li\u003e\n\t\t\t\t\u003cli\u003eCompatible with a wide range of laboratory and industrial vacuum workflows\u003c\/li\u003e\n\t\t\t\t\u003cli\u003eDurable construction supports reliable long-term operation\u003c\/li\u003e\n\t\t\t\u003c\/ul\u003e\n\t\t\u003c\/div\u003e\n\t\t\u003cdiv class=\"features-side\"\u003e\n\t\t\t\u003cimg src=\"https:\/\/www.marshallscientific.com\/v\/vspfiles\/feature-images\/W2581B.jpg\"\u003e\n\t\t\u003c\/div\u003e\n\t\u003c\/div\u003e\n\tThe 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.\n\t\u003cbr\u003e\u003cbr\u003e\n\tThe 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.\n\t\u003cbr\u003e\u003cbr\u003e\n\tAll of our equipment is in excellent condition and will be fully tested to perform at factory specifications before being shipped.\u003cbr\u003e\u003cbr\u003e\n\t\u003cdiv class=\"included-box\"\u003e\n\t\t\u003cspan class=\"included-header\"\u003eINCLUDED:\u003c\/span\u003e\u003cbr\u003eThe Welch 2581B-50 Dry Oil-Free Piston Vacuum Pump includes:\n\t\t\u003cul\u003e\n\t\t\t\u003cli\u003e\n\u003cspan class=\"hidden-car\"\u003e\u0026gt; \u003c\/span\u003ePower Cord\u003c\/li\u003e\n\t\t\t\u003cli\u003e\n\u003cspan class=\"hidden-car\"\u003e\u0026gt; \u003c\/span\u003eOperator's Manual\u003c\/li\u003e\n\t\t\t\u003cli\u003e\n\u003cspan class=\"hidden-car\"\u003e\u0026gt; \u003c\/span\u003eFull 180 Day Parts and Labor Warranty\u003c\/li\u003e\n\t\t\u003c\/ul\u003e\n\t\u003c\/div\u003e\n\t\u003cbr\u003e\n\t\u003ch2\u003eWelch 2581B-50 Dry Oil-Free Piston Vacuum Pump Specifications\u003c\/h2\u003e\n\t\u003ctable\u003e\n\t\u003ctbody\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tMaximum Pumping Speed\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t100 l\/min (6 m\n\t\t\t\u003csup\u003e3\u003c\/sup\u003e\/h)\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tUltimate Pressure\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t6.7 mBar\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tSuction Connection\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\tHose nozzle DN 8\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tPressure Connection\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\tHose nozzle DN 8\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tAmbient Operating Temperature\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t+10°C to +40°C\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tMax. Operating Gas Temp.\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t+60°C\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tNoise Level\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t≤ 56 dB(A)\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tDimensions (W x D x H)\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t17 x 7.6 x 12 in. (43.2 x 19.1 x 30.5 cm)\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tWeight\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t22.7 lb. (10.3 kg)\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\n\t\t\tElectrical Requirements\n\t\t\u003c\/td\u003e\n\t\t\u003ctd\u003e\n\t\t\t115V, 60Hz\n\t\t\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\t\u003c\/table\u003e\n\t\u003cspan class=\"downloads-header\"\u003eDownloads\u003c\/span\u003e\n\t\u003cdiv class=\"downloads-section\"\u003e\n\t\t\u003cdiv class=\"pdf-button\"\u003e\n\t\t\t\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0674\/5853\/1418\/files\/Welch_2581B-50_Dry_Oil-Free_Piston_Vacuum_Pump_-_Marshall_Scientific.pdf?v=1780078555\" target=\"blank\"\u003e\n\t\t\tTechnical Specification Download\n\t\t\t\u003c\/a\u003e\n\t\t\u003c\/div\u003e\n\t\t\u003cdiv class=\"pdf-button\"\u003e\n\t\t\t\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0674\/5853\/1418\/files\/Welch_2581B-50_Dry_Oil-Free_Piston_Vacuum_Pump_Manual_-_Marshall_Scientific.pdf?v=1780078559\" target=\"blank\"\u003e\n\t\t\tOperator's Manual Download\n\t\t\t\u003c\/a\u003e\n\t\t\u003c\/div\u003e\n\t\u003c\/div\u003e\n\t\u003cdiv class=\"formalquote2\"\u003e\n\t\t\u003ca class=\"formalquote2link\" href=\"\/formal_quote_a\/3126.htm\" target=\"blank\"\u003eRequest a Formal Quote\u003c\/a\u003e\n\t\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e","brand":"Marshall scientific","offers":[{"title":"Default Title","offer_id":43428812882010,"sku":"W2581B","price":1195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/5853\/1418\/files\/W2581B-2T.jpg?v=1779994198","url":"https:\/\/p2gnpt-0c.myshopify.com\/products\/welch-2581b-50-dry-oil-free-piston-vacuum-pump","provider":"Marshall Scientific","version":"1.0","type":"link"}