{"title":"Atlas Copco Piston Pumps","description":"\u003cp\u003eSome vacuum processes are simply hard on pumps. Vacuum furnaces, transformer drying lines and large coating chambers bring heavy gas loads, dust, vapors and long run times. Atlas Copco GLS rotary piston pumps are built for that kind of work. Heavy cast and ductile iron construction, slow rotation and large internal clearances give them a long service life in demanding industrial duty. At Provac Sales, we supply the Atlas Copco GLS 250 and GLS 500 new and rebuilt, and we offer repair and rebuild service for Atlas Copco vacuum equipment.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eAtlas Copco GLS 250 rotary piston pump, the smaller frame in the series\u003c\/li\u003e\n\u003cli\u003eAtlas Copco GLS 500 rotary piston pump, part number 8153311355, about 300 CFM at 60 Hz\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe GLS 500 listing shows a 4 inch ASA\/ANSI inlet, 3 inch ASA\/ANSI exhaust, a 3-phase 230\/460 V 60 Hz motor, hydrocarbon oil and an ultimate pressure below 2.5 x 10⁻² Torr without gas ballast. It weighs about 1,750 lbs, so plan for proper rigging and a solid foundation. The GLS 250 shares the same design in a smaller frame. Manuals and technical sheets are linked on each product page.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eHow a Rotary Piston Pump Works\u003c\/h3\u003e\n\n\u003cp\u003eA rotary piston pump uses an eccentric that drives a piston around the inside of a cylinder. A slide valve attached to the piston moves through a pivoting guide and separates the inlet side from the compression side. As the eccentric turns, gas is drawn in, trapped, compressed and pushed out through the exhaust valve. Oil seals the clearances, lubricates moving parts and carries away heat.\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 12px;\"\u003eCompared with a rotary vane pump, a piston pump has fewer, heavier moving parts and larger clearances. It turns slowly and is balanced to reduce vibration. That combination makes it more tolerant of particulates and heavy gas loads, and less prone to the vane wear that limits vane pumps in dirty service.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eKey Features of the GLS Series\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eRobust cast and ductile iron construction\u003c\/li\u003e\n\u003cli\u003eCompact design with few moving parts and large clearances\u003c\/li\u003e\n\u003cli\u003eSlow rotational speed for long component life\u003c\/li\u003e\n\u003cli\u003eBalanced design to reduce vibration\u003c\/li\u003e\n\u003cli\u003eAutomatic lubrication\u003c\/li\u003e\n\u003cli\u003eWater-saving temperature control to keep the pump at the right running temperature\u003c\/li\u003e\n\u003cli\u003eGas ballast for handling condensable vapors\u003c\/li\u003e\n\u003cli\u003eSeries pumping speed of about 138 to 260 CFM, with motor power from 7.5 to 25 hp at 60 Hz\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eAdding a ZRS Booster\u003c\/h3\u003e\n\n\u003cp\u003eGLS pumps are often used as the backing stage of a larger pumping system. Adding an Atlas Copco ZRS mechanical booster on top of a GLS 250 or GLS 500 raises system pumping speed to roughly 294 to 1,530 CFM and improves performance at lower pressures. The ZRS hydrokinetic drive lets the booster and piston pump start together without a bypass valve. Browse our \u003ca href=\"https:\/\/www.provac.com\/collections\/atlas-copco-blowers-and-boosters\" title=\"Atlas Copco Blowers and Boosters\" style=\"font-family: 'Open Sans', sans-serif; font-size: 14px; letter-spacing: .5px; font-weight: 400; color: #23527c;\"\u003eAtlas Copco blowers and boosters\u003c\/a\u003e collection to build a matched set.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eApplications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eVacuum heat treatment, vacuum melting and metallurgy\u003c\/li\u003e\n\u003cli\u003eChemical processing\u003c\/li\u003e\n\u003cli\u003eTransformer drying and cable fluid conditioning\u003c\/li\u003e\n\u003cli\u003eVacuum coating and large-area glass coating\u003c\/li\u003e\n\u003cli\u003ePET processing\u003c\/li\u003e\n\u003cli\u003eLarge chamber pumping\u003c\/li\u003e\n\u003cli\u003eLeak detection systems\u003c\/li\u003e\n\u003cli\u003ePharmaceutical processing\u003c\/li\u003e\n\u003cli\u003eAutomotive and aerospace manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eRotary Piston vs Rotary Vane: Which Do You Need?\u003c\/h3\u003e\n\n\u003cp\u003eBoth are oil-sealed and both reach similar rough vacuum levels, but they fit different jobs:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eChoose a GLS rotary piston pump for heavy-duty, high-throughput service, dusty or dirty processes, large chambers and long continuous run times\u003c\/li\u003e\n\u003cli\u003eChoose a GVD or GVS rotary vane pump for lighter loads, smaller systems, lower purchase cost and a smaller footprint\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you are replacing an older piston pump from another brand, send us the model and flange sizes. A GLS pump is often a practical replacement, but footprint, flange sizes, motor wiring and cooling connections need to be checked first. See our \u003ca href=\"https:\/\/www.provac.com\/collections\/atlas-copco-vane-pumps\" title=\"Atlas Copco Vane Pumps\" style=\"font-family: 'Open Sans', sans-serif; font-size: 14px; letter-spacing: .5px; font-weight: 400; color: #23527c;\"\u003eAtlas Copco vane pumps\u003c\/a\u003e collection for vane pump options.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eHow to Choose the Right GLS Pump\u003c\/h3\u003e\n\n\u003cp\u003eBefore ordering, confirm:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eChamber volume and required pump-down time\u003c\/li\u003e\n\u003cli\u003eWorking pressure and ultimate pressure needed\u003c\/li\u003e\n\u003cli\u003eGas load, including water vapor, solvents and particulates\u003c\/li\u003e\n\u003cli\u003eWhether a booster is already installed or planned\u003c\/li\u003e\n\u003cli\u003eInlet and exhaust flange sizes on existing pipework\u003c\/li\u003e\n\u003cli\u003eSupply voltage, phase and frequency\u003c\/li\u003e\n\u003cli\u003eCooling water availability, floor space and lifting access\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eMaintenance Tips\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eCheck oil level and condition daily on heavy-duty processes\u003c\/li\u003e\n\u003cli\u003eChange oil more often on dirty or wet processes, since contaminated oil speeds up wear\u003c\/li\u003e\n\u003cli\u003eUse gas ballast when pumping water vapor or condensables\u003c\/li\u003e\n\u003cli\u003eKeep the inlet filter or dust trap clean\u003c\/li\u003e\n\u003cli\u003eMonitor cooling water flow and running temperature\u003c\/li\u003e\n\u003cli\u003eListen for knocking or new vibration, which can point to worn bearings or slide valve parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor longer oil life, consider an exhaust oil mist filter or oil filtration system. Browse our \u003ca href=\"https:\/\/www.provac.com\/collections\/oil-filtration-systems\" title=\"Oil Filtration Systems\" style=\"font-family: 'Open Sans', sans-serif; font-size: 14px; letter-spacing: .5px; font-weight: 400; color: #23527c;\"\u003eoil filtration systems\u003c\/a\u003e and \u003ca href=\"https:\/\/www.provac.com\/collections\/vacuum-fluids-and-greases\" title=\"Vacuum Fluids and Greases\" style=\"font-family: 'Open Sans', sans-serif; font-size: 14px; letter-spacing: .5px; font-weight: 400; color: #23527c;\"\u003evacuum fluids and greases\u003c\/a\u003e collections.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eInstallation Tips\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eUse proper lifting equipment and lift only at the designated points, since the GLS 500 weighs about 1,750 lbs\u003c\/li\u003e\n\u003cli\u003eMount the pump on a level, rigid foundation and use anti-vibration mounts where the manual recommends them\u003c\/li\u003e\n\u003cli\u003eSupport inlet and exhaust piping independently so no load sits on the pump flanges\u003c\/li\u003e\n\u003cli\u003eFill the pump with the correct grade of hydrocarbon oil to the sight glass before the first start\u003c\/li\u003e\n\u003cli\u003eConnect and check cooling water flow before running the pump\u003c\/li\u003e\n\u003cli\u003eConfirm motor rotation with a short bump test\u003c\/li\u003e\n\u003cli\u003ePipe the exhaust away from the work area, ideally through an oil mist eliminator\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRecord base pressure, oil temperature and pump-down time on the first run. Those figures give you a reliable reference for spotting wear later.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eSigns Your Piston Pump Needs Service\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eBase pressure is rising or pump-down is slower\u003c\/li\u003e\n\u003cli\u003eOil is dark, milky or full of particulates soon after a change\u003c\/li\u003e\n\u003cli\u003eKnocking, vibration or new mechanical noise\u003c\/li\u003e\n\u003cli\u003eOil leaks at shaft seals or gaskets\u003c\/li\u003e\n\u003cli\u003eOverheating or high motor current\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eNew vs Rebuilt GLS Pumps\u003c\/h3\u003e\n\n\u003cp\u003eRotary piston pumps are built to be rebuilt. The heavy castings last a long time, so replacing bearings, seals, valves and worn internal parts can return a pump to service at a fraction of the cost of a new unit. A new GLS pump is the better choice for new installations or where full factory warranty is required. Each quotation confirms the condition and warranty.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eAtlas Copco Piston Pump Repair\u003c\/h3\u003e\n\n\u003cp\u003eProvac Sales repairs and rebuilds Atlas Copco vacuum pumps, including GLS rotary piston pumps. Submit an RMA request, complete the contamination data sheet and drain the oil before shipping. Given the weight, tell us your loading arrangements so we can plan freight. See our \u003ca href=\"https:\/\/www.provac.com\/pages\/pump-repair\" title=\"Pump Repair\" style=\"font-family: 'Open Sans', sans-serif; font-size: 14px; letter-spacing: .5px; font-weight: 400; color: #23527c;\"\u003epump repair page\u003c\/a\u003e for more information.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eAtlas Copco GLS Piston Pumps FAQ\u003c\/h3\u003e\n\n\u003ch4 style=\"margin-top: 16px;\"\u003e1. What is the pumping speed of the Atlas Copco GLS 500?\u003c\/h4\u003e\n\n\u003cp\u003eThe GLS 500 listing shows about 300 CFM at 60 Hz, with an ultimate pressure below 2.5 x 10⁻² Torr without gas ballast. Check the technical sheet for the full performance curve.\u003c\/p\u003e\n\n\u003ch4 style=\"margin-top: 16px;\"\u003e2. Can a GLS pump be used with a booster?\u003c\/h4\u003e\n\n\u003cp\u003eYes. GLS 250 and GLS 500 pumps are commonly paired with Atlas Copco ZRS boosters, which raise system pumping speed to roughly 294 to 1,530 CFM depending on the combination.\u003c\/p\u003e\n\n\u003ch4 style=\"margin-top: 16px;\"\u003e3. Why choose a rotary piston pump over a rotary vane pump?\u003c\/h4\u003e\n\n\u003cp\u003eRotary piston pumps have heavier construction, slower rotation and larger clearances. They handle dirty processes, heavy gas loads and long run times better than vane pumps, which makes them common in metallurgy, coating and drying.\u003c\/p\u003e\n\n\u003ch4 style=\"margin-top: 16px;\"\u003e4. Can a GLS pump replace an older piston pump from another brand?\u003c\/h4\u003e\n\n\u003cp\u003eOften, yes, but footprint, flange sizes, motor wiring and cooling connections need to be checked. Send us your existing pump model and we will confirm the fit.\u003c\/p\u003e\n\n\u003ch4 style=\"margin-top: 16px;\"\u003e5. Can you rebuild my Atlas Copco GLS pump?\u003c\/h4\u003e\n\n\u003cp\u003eYes. Provac Sales repairs and rebuilds Atlas Copco vacuum pumps. Submit an RMA, drain the oil and include the model, serial number and symptoms before shipping.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top: 24px;\"\u003eRequest a Quote on Atlas Copco Piston Pumps\u003c\/h3\u003e\n\n\u003cp\u003eSend us your chamber size, working pressure, process details and supply voltage. We will recommend a GLS 250 or GLS 500, with or without a ZRS booster, confirm availability, or quote a rebuild of your existing pump. \u003ca href=\"https:\/\/www.provac.com\/pages\/contact-us\" title=\"Contact Us\" style=\"font-family: 'Open Sans', sans-serif; font-size: 14px; letter-spacing: .5px; font-weight: 400; color: #23527c;\"\u003eContact us\u003c\/a\u003e or call 831-462-8900.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the pumping speed of the Atlas Copco GLS 500?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The GLS 500 listing shows about 300 CFM at 60 Hz, with an ultimate pressure below 2.5 x 10⁻² Torr without gas ballast. Check the technical sheet for the full performance curve.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can a GLS pump be used with a booster?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. GLS 250 and GLS 500 pumps are commonly paired with Atlas Copco ZRS boosters, which raise system pumping speed to roughly 294 to 1,530 CFM depending on the combination.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why choose a rotary piston pump over a rotary vane pump?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Rotary piston pumps have heavier construction, slower rotation and larger clearances. They handle dirty processes, heavy gas loads and long run times better than vane pumps, which makes them common in metallurgy, coating and drying.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can a GLS pump replace an older piston pump from another brand?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Often, yes, but footprint, flange sizes, motor wiring and cooling connections need to be checked. Send us your existing pump model and we will confirm the fit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can you rebuild my Atlas Copco GLS pump?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Provac Sales repairs and rebuilds Atlas Copco vacuum pumps. Submit an RMA, drain the oil and include the model, serial number and symptoms before shipping.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","products":[{"product_id":"atlas-copco-gls-500-piston-pump","title":"Atlas Copco GLS 500 Piston Pump","description":"\u003cdiv\u003e\n\u003cdiv id=\"tabs\"\u003e\n\u003cdiv class=\"tab active-tab\"\u003e\u003ca\u003eOverview\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"tab\"\u003e\u003ca\u003eSpecifications\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"tab\"\u003e\u003ca\u003eVideos\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"tab\"\u003e\u003ca\u003ePump Repair\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"tab-contents\"\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003cstrong\u003eType of product\u003c\/strong\u003e: piston pump\u003cbr\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Atlas Copco\u003cbr\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e: $29,500.00\u003cbr\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e: 8153311355\u003cbr\u003e\u003cstrong\u003eInlet\u003c\/strong\u003e: 4\" ASA\/ANSI\u003cbr\u003e\u003cstrong\u003eExhaust\u003c\/strong\u003e: 3\" ASA\/ANSI\u003cbr\u003e\u003cstrong\u003eMotor\u003c\/strong\u003e: 3 Phase, 230\/460V, 60Hz\u003cbr\u003e\u003cstrong\u003eOil\u003c\/strong\u003e: hydrocarbon\u003cbr\u003e\u003cstrong\u003ePumping speed\u003c\/strong\u003e: 300 CFM (60Hz)\u003cbr\u003e\u003cstrong\u003eUltimate pressure\u003c\/strong\u003e: \u0026lt; 2.5 x 10-2 Torr (without gas ballast)\u003cbr\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e: 1,750 lbs\u003cbr\u003e*Other Configurations Available Upon Request\u003cbr\u003e\u003cstrong\u003eOUT OF STOCK ITEMS STILL AVAILABLE FOR PURCHASE, please contact\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/4021\/files\/GLS_250_500.pdf?v=1614325932\" title=\"Atlas Copco GLS 500 Technical Data Sheet\" target=\"_blank\"\u003eTechnical Sheet\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/4021\/files\/GLS_250_500_manual.pdf?v=1626193968\" title=\"Atlas Copco GLS 500 Instruction Manual\" target=\"_blank\"\u003eManual\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Vacuum Pumps - Provac Sales Inc.","offers":[{"title":"Default Title","offer_id":30282646220,"sku":null,"price":29500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0598\/4021\/products\/Atlas_Copco_GLS-500_3.jpg?v=1559069565"},{"product_id":"atlas-copco-gls-250-piston-pump","title":"Atlas Copco GLS 250 Piston Pump","description":"\u003cdiv id=\"tabs\"\u003e\n\u003cdiv class=\"tab active-tab\"\u003e\n\u003ca\u003e\u003c\/a\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"tab-contents\"\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003cstrong\u003eType of product\u003c\/strong\u003e: piston pump\u003cbr\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Atlas Copco\u003cbr\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e: ASK\u003cbr\u003e\u003cstrong\u003eInlet\u003c\/strong\u003e: 3\" ASA\u003cbr\u003e\u003cstrong\u003eExhaust\u003c\/strong\u003e: 2\" ASA\u003cbr\u003e\u003cstrong\u003ePumping speed\u003c\/strong\u003e: 150 CFM (60Hz)\u003cbr\u003e\u003cstrong\u003eUltimate pressure\u003c\/strong\u003e: \u0026lt; 2.5 x 10-2 Torr\u003cbr\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e: 950 lbs\u003cbr\u003e*Other Configurations Available Upon Request\u003cbr\u003e\u003cstrong\u003eOUT OF STOCK ITEMS STILL AVAILABLE FOR PURCHASE, please contact\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/4021\/files\/GLS_250_500.pdf?v=1614325932\" target=\"_blank\" title=\"Atlas Copco GLS 250 Technical Data Sheet\" rel=\"noopener noreferrer\"\u003eTechnical Sheet\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0598\/4021\/files\/GLS_250_500_manual.pdf?v=1626193968\" target=\"_blank\" title=\"Atlas Copco GLS 250 Instruction Manual\" rel=\"noopener noreferrer\"\u003eManual\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Vacuum Pumps - Provac Sales Inc.","offers":[{"title":"Default Title","offer_id":21306219790420,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0598\/4021\/products\/Atlas_Copco_GLS_250_1.jpg?v=1560447083"}],"url":"https:\/\/www.provac.com\/collections\/atlas-copco-piston-pumps.oembed","provider":"Provac","version":"1.0","type":"link"}