{"id":246793,"date":"2020-04-11T11:05:48","date_gmt":"2020-04-11T11:05:48","guid":{"rendered":"https:\/\/radiant-reverie-my.demo-lemonade.work\/?product=progressive-cavity-pump"},"modified":"2026-09-28T15:57:20","modified_gmt":"2026-09-28T07:57:20","slug":"progressive-cavity-pump","status":"publish","type":"product","link":"https:\/\/winstonengineering.com\/my\/product\/progressive-cavity-pump\/","title":{"rendered":"Progressive Cavity Pump"},"content":{"rendered":"<div dir=\"auto\">\n<div dir=\"auto\">\n<h3><b>Working Principle &amp; Core Mechanics<\/b><\/h3>\n<ul>\n<li><strong>Progressing Cavity Action<\/strong>: As the single metallic rotor turns within the resilient stator, set sealing cavities form along the axis and progress continuously from the suction end to the discharge end, smoothly carrying the fluid.<\/li>\n<li><strong>Independent Head &amp; Proportional Flow<\/strong>: The discharge head developed is independent of rotational speed, while flow capacity is directly proportional to speed, ensuring predictable metering performance.<\/li>\n<li><strong>Cardan Universal Joint<\/strong>: Employs a robust Cardan-type universal joint with two sets of perpendicular pins. This configuration distributes angular loads smoothly and withstands the high axial forces inherent to progressive cavity pumping, outperforming conventional single-pin or gear joint designs.<\/li>\n<\/ul>\n<hr \/>\n<h3><b>Key Technical Advantages<\/b><\/h3>\n<ul>\n<li><strong>Self-Priming &amp; High Vacuum Suction<\/strong>: Inherently self-priming with suction lift capabilities reaching up to <strong>9.5 mwc<\/strong>, eliminating the need for a foot valve even under high vacuum conditions.<\/li>\n<li><strong>Non-Clogging &amp; High Solid Capacity<\/strong>: Capable of handling suspended solids and highly viscous media without clogging.<\/li>\n<li><strong>Low Internal Velocity &amp; Low Shear<\/strong>: Delivers minimal fluid shear, preventing degradation of shear-sensitive or pseudo-plastic media.<\/li>\n<li><strong>Reversible Operation<\/strong>: Operates with equal efficiency in either forward or reverse rotation.<\/li>\n<li><strong>Ease of Maintenance<\/strong>: Features an externally mounted stuffing box for easy adjustment of gland packing or mechanical seals without dismantling the bearing housing.<\/li>\n<li><strong>Tougher Bearing Support<\/strong>: Outfitted with taper roller bearings on medium and large models to ensure rigid shaft concentricity, and heavy-duty radial ball bearings on smaller models.<\/li>\n<\/ul>\n<hr \/>\n<div dir=\"auto\">\n<h3><b>Materials &amp; Configuration Options<\/b><\/h3>\n<ul>\n<li><strong>Housing<\/strong>: Cast Iron, Cast Steel, Cast Stainless Steel, Fabricated Steel, and SS.<\/li>\n<li><strong>Stators<\/strong>: Natural Rubber, Nitrile, High Nitrile, EPDM, Chloro-Sulphonated Rubber, and Fluoroelastomer.<\/li>\n<li><strong>Rotors &amp; Shafts<\/strong>: Alloy Steel, Case Hardened Steel, Hard Chrome Plated (HCP) Stainless Steel, plus exotic alloys like <strong>Alloy 20<\/strong> and <strong>Hastelloy<\/strong>.<\/li>\n<li><strong>Sealing<\/strong>: Aramid PTFE-impregnated or graphite gland packings; single\/double balanced or unbalanced mechanical seals with optional API flushing plans.<\/li>\n<li><strong>Drives<\/strong>: Direct motor\/geared motor, V-belt drives, mechanical speed variators, hydraulic, pneumatic, or engine drives.<\/li>\n<\/ul>\n<hr \/>\n<h3><b>Primary Applications &amp; Media Handled<\/b><\/h3>\n<ul>\n<li><strong>Sewage &amp; Environmental<\/strong>: Digested sewage sludge, de-watered effluent, polyelectrolytes, and flocculants.<\/li>\n<li><strong>Sugar &amp; Food Processing<\/strong>: Massecuite, molasses, spent wash, fruit pulps, syrups, and dairy products.<\/li>\n<li><strong>Pulp, Paper &amp; Chemicals<\/strong>: Paper pulp (12\u201321% consistency), black liquor, ceramic slurries, acids, alkalis, latex, and explosive slurries.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p><span dir=\"auto\">The <strong>Roto Progressive Cavity Pump<\/strong> (manufactured by <strong>Roto Pumps Ltd.<\/strong>) is a heavy-duty positive displacement pump engineered for uniform, metered, and non-pulsating fluid transfer. Designed to handle a vast spectrum of fluids\u2014from clean liquids to highly viscous, abrasive, shear-sensitive, or solid-laden slurries\u2014it relies on a precision-machined single external helix metallic rotor rotating inside a double internal helix elastomer stator<\/span><\/p>\n","protected":false},"featured_media":246794,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":""},"product_brand":[],"product_cat":[92,537],"product_tag":[],"class_list":["post-246793","product","type-product","status-publish","has-post-thumbnail","product_cat-liquid-transfer","product_cat-progressive-cavity-pump","pa_housing-separate-bearing-housing","pa_low-internal-velocity-minimum-degradation-of-shear-sensitive-media-and-can-also-handle-highly-viscous-materials-having-pseudo-plastic-characteristics","pa_low-npsh-requirement-suction-lift-capabilities-of-up-to-95-mwc-effective-even-in-high-vacuum-conditions","pa_non-clogging-can-handle-solids-in-suspension-or-medias-containing-a-high-percentage-of-solids","pa_reversible-due-to-the-reversible-rotation-capabilities-progressive-cavity-pumps-can-perform-with-equal-efficiency-in-either-direction","pa_self-priming-inherently-self-priming-the-pumps-can-work-on-snore-do-not-require-a-foot-valve","pa_silent-running-rotors-turn-inside-a-resilient-stator-thus-generate-little-noise","first","outofstock","shipping-taxable","purchasable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/product\/246793","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/comments?post=246793"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/media\/246794"}],"wp:attachment":[{"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/media?parent=246793"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/product_brand?post=246793"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/product_cat?post=246793"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/winstonengineering.com\/my\/wp-json\/wp\/v2\/product_tag?post=246793"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}