[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-653837-105":59,"doc-detail-653837-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","troubleshooting-guide-progressive-cavity-moyno-pumps","Troubleshooting Guide - Progressive Cavity (Moyno) Pumps","","Troubleshooting Guide for Progressive Cavity (Moyno) pumps, organized by operational symptoms with corresponding potential causes and corrective actions. Covers insufficient pressure or vacuum (including priming, rotation direction, gauge faults, RPM mismatch, impeller sizing, obstructions between pump and gauge, power issues, and disconnected/re-alignment of the pump-motor coupling). Addresses leaks via worn gaskets, overheated mechanical seals from dry running, leaking fittings, and reversed operation effects on the rotor. Includes low flow rate causes and fixes, and excessive noise through clearance checks and alignment/coupling condition corrections.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/troubleshooting-guide-progressive-cavity-moyno-pumps/653837/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/troubleshooting-guide-progressive-cavity-moyno-pumps/653837.png","ImageObject",300,407,{"name":92,"@type":93},"Dewi_Sukmawati","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-01","2026-10-25",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What should be checked if the pump does not produce sufficient pressure or vacuum?","Question",{"text":112,"@type":113},"Prime the pump, verify the rotation direction, and test/replace any faulty pressure or vacuum gauge. Also confirm the pump runs at the required RPM and that the impeller size is correct, then clear any obstructions between the pump and gauge.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What actions help when the pump is leaking?",{"text":117,"@type":113},"Replace worn or faulty gaskets and inspect for mechanical seal overheating, which can occur if the pump runs without water. Tighten leaking fittings, check for leaks around the pump, and if the pump was run in reverse, disassemble and screw the rotor back onto the shaft per the manufacturer’s manual.",{"name":119,"@type":110,"acceptedAnswer":120},"How can excessive noise during pump operation be resolved?",{"text":121,"@type":113},"Manually rotate the pump impeller to check for clearance problems, then disassemble and correct clearance if needed. Check pump alignment and reset it if the flexible coupling has degraded; replace the flexible coupling when degraded.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},653837,1792900586,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":8,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":81},962094243415,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","MID-ATLANTIC  \nENVIRONMENTAL EQUIPMENT  \n[MAE2.com](MAE2.com)  \nTroubleshooting Guide  \nProgressive Cavity (Moyno) Pumps  \n\n| Symptom | Potential Cause | Possible Solution |\n| --- | --- | --- |\n| Pump does not produce sufficient pressure/vacuum. | Pump is not primed. | Prime pump. |\n|  | Wrong direction of rotation. | Check and change rotation if required. |\n|  | Vacuum or pressure gauge is faulty. | Replace gauge. |\n|  | Pump is not operating at required RPM. | Check and replace motor if required. |\n|  | Pump has wrong sized impeller. | Check impeller and replace if required. |\n|  | Pump pressure or vacuum is lost due to\u003Cbr>obstruction located between pump and gauge. | Check for flow restrictions and clean strainers or piping if required. |\n|  | Pump is not turned on. | Turn pump on. |\n|  | Coupling between pump and motor is no longer connected preventing the pump from rotating with the motor. | Reconnect and realign motor and pump. |\n| Pump is leaking. | Gaskets are worn or faulty. | Replace gaskets. |\n|  | Mechanical seal has been overheated. This is often a result of operating the pump without any water. | Replace mechanical seal. |\n|  | Fittings are leaking on or around pump. | Tighten fittings. |\n|  | Water may be coming from another location. | Check for leaks around pump. |\n|  | Pump was run in reverse allowing the rotor to spinoff of the pump shaft. | Disassemble pump and screw rotor back onto shaft (See manufacturer’s manual) . |\n| Pump flow rate is too low. | Backpressure is too high for pump. | Reduce backpressure. |\n|  | Pump may not be sized correctly for process. | Replace pump. |\n|  | Pump impeller is too small. | Change pump impeller but watch power\u003Cbr>consumption on motor. |\n|  | Flow control valve is closed. | Open flow control valve. |\n|  | May have blocked line or filter. | Replace filter and clean line. |\n| Pump is making excessive noise during operation. | Manually rotate pump impeller and listen for clearance problems. | Disassemble pump and fix clearance problems. |\n|  | Alignment of pump may be off causing the flexible coupling to degrade. | Check alignment and reset alignment if needed. Replace flexible coupling if it is degraded. |\n\nMID-ATLANTIC ENVIRONMENTAL EQUIPMENT, INC.  \nMain Phone: 877-MAE2inc (877-623-2462)  \n[mae2.com](mae2.com)  \nCorporate Headquarters  \n15 Carroll Drive Bluffton, SC 29910  \n843-836-1804  \nFax: 843-836-1805  \nEmail: [sevans@mae2.com](sevans@mae2.com)  \nManufacturing Facility  \nHardeeville, SC 843-296-4580  \nField Support Services  \nCanton, GA 843-247-4087  \nRegional Sales Office  \n182 Spring Oaks Lane Ruckersville, VA 22968  \n434-531-3472  \nFax: 434-985-1214  \n[Email: jfrydl@mae2.com](Email: jfrydl@mae2.com)  \n© 2017. Mid-Atlantic Environmental Equipment Inc. All rights reserved.","cbCaihf3LHyxvztA","https://ap.wps.com/l/cbCaihf3LHyxvztA","pdf",137522,"English","# Troubleshooting Symptoms\n## Pump does not produce sufficient pressure/vacuum\n## Pump is leaking\n## Pump flow rate is too low\n## Pump is making excessive noise during operation","[{\"question\":\"What should be checked if the pump does not produce sufficient pressure or vacuum?\",\"answer\":\"Prime the pump, verify the rotation direction, and test/replace any faulty pressure or vacuum gauge. Also confirm the pump runs at the required RPM and that the impeller size is correct, then clear any obstructions between the pump and gauge.\"},{\"question\":\"What actions help when the pump is leaking?\",\"answer\":\"Replace worn or faulty gaskets and inspect for mechanical seal overheating, which can occur if the pump runs without water. Tighten leaking fittings, check for leaks around the pump, and if the pump was run in reverse, disassemble and screw the rotor back onto the shaft per the manufacturer’s manual.\"},{\"question\":\"How can excessive noise during pump operation be resolved?\",\"answer\":\"Manually rotate the pump impeller to check for clearance problems, then disassemble and correct clearance if needed. Check pump alignment and reset it if the flexible coupling has degraded; replace the flexible coupling when degraded.\"}]","Troubleshooting Guide - Progressive Cavity (Moyno) Pumps | PDF"]