{"id":607,"date":"2022-08-02T06:36:57","date_gmt":"2022-08-02T06:36:57","guid":{"rendered":"http:\/\/gerhman.com\/?post_type=product&#038;p=607"},"modified":"2025-06-06T02:07:04","modified_gmt":"2025-06-06T02:07:04","slug":"nrd61-back-draft-damper","status":"publish","type":"product","link":"https:\/\/gerhman.com\/fr\/produit\/nrd61-back-draft-damper\/","title":{"rendered":"NRD61 &#8211;  back draft damper"},"content":{"rendered":"<p>Back draft dampers also named non return dampers type \u2018NRD61\u2019, are designed for use intake and discharge opening in commercial and residential air conditioning systems. When the ventilation system is on, the blades of the non-return damper are held in the open position by the airflow. If the system is switched off, the damper blades close automatically, thus preventing reverse airflow and giving protection against the ingress of untempered air, rain and birds into the air conditioning system.<\/p>\n<p><strong>Design<\/strong><\/p>\n<div>\u2022Non return damper designed to be duct mounted.<\/div>\n<div>\u2022Frame &amp; blades made from 20 ga. galvanized steel.<\/div>\n<div>\u2022Frame and blades manufactured from mill finish aluminum. (optionally)<\/div>\n<div>\u2022Round spindles \u00d8 12 mm linked together by means of GI linkages.<\/div>\n<div>\u2022Gasket is provided on blade tips for low leakage. (optionally)<\/div>\n<div>\u2022Casing air leakage according to EN1752, class C<\/div>\n<div>\u2022The frame has 20-25-30-35 mm wide flanges options.<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Back draft dampers also named non return dampers type \u2018NRD61\u2019, are designed for use intake and discharge opening in commercial and residential air conditioning systems. When<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"featured_media":609,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[41,42,44],"product_tag":[80],"class_list":{"0":"post-607","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-airflow-management","7":"product_cat-control-dampers","8":"product_cat-overflow-units","9":"product_tag-heavy","11":"first","12":"instock","13":"shipping-taxable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/product\/607","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/comments?post=607"}],"version-history":[{"count":1,"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/product\/607\/revisions"}],"predecessor-version":[{"id":608,"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/product\/607\/revisions\/608"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/media\/609"}],"wp:attachment":[{"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/media?parent=607"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/product_brand?post=607"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/product_cat?post=607"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gerhman.com\/fr\/wp-json\/wp\/v2\/product_tag?post=607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}