\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

DN<\/th>\n	Size (Inch)<\/th>\n	L (Length \u2013 mm)<\/th>\n	D (Flange outside diameter \u2013 mm)<\/th>\n	C (Bolt circle diameter \u2013 mm)<\/th>\n	b (Flange thickness \u2013 mm)<\/th>\n	n-d (No. of holes \u00d7 hole diameter)<\/th>\n<\/tr>\n<\/thead>\n
50<\/td>\n	2″<\/td>\n	125<\/td>\n	160<\/td>\n	125<\/td>\n	19<\/td>\n	4 – 19<\/td>\n<\/tr>\n
65<\/td>\n	2 1\/2″<\/td>\n	135<\/td>\n	180<\/td>\n	145<\/td>\n	19<\/td>\n	4 – 19<\/td>\n<\/tr>\n
80<\/td>\n	3″<\/td>\n	155<\/td>\n	195<\/td>\n	160<\/td>\n	19<\/td>\n	8 – 19<\/td>\n<\/tr>\n
100<\/td>\n	4″<\/td>\n	165<\/td>\n	215<\/td>\n	180<\/td>\n	19<\/td>\n	8 – 19<\/td>\n<\/tr>\n
125<\/td>\n	5″<\/td>\n	195<\/td>\n	245<\/td>\n	210<\/td>\n	19<\/td>\n	8 – 19<\/td>\n<\/tr>\n
150<\/td>\n	6″<\/td>\n	210<\/td>\n	280<\/td>\n	240<\/td>\n	19<\/td>\n	8 – 23<\/td>\n<\/tr>\n
200<\/td>\n	8″<\/td>\n	256<\/td>\n	335<\/td>\n	295<\/td>\n	20<\/td>\n	12 – 23<\/td>\n<\/tr>\n
250<\/td>\n	10″<\/td>\n	285<\/td>\n	405<\/td>\n	355<\/td>\n	22<\/td>\n	12 – 28<\/td>\n<\/tr>\n
300<\/td>\n	12″<\/td>\n	315<\/td>\n	460<\/td>\n	410<\/td>\n	24.5<\/td>\n	12 – 28<\/td>\n<\/tr>\n
350<\/td>\n	14″<\/td>\n	330<\/td>\n	520<\/td>\n	470<\/td>\n	26.5<\/td>\n	16 – 28<\/td>\n<\/tr>\n
400<\/td>\n	16″<\/td>\n	365<\/td>\n	580<\/td>\n	525<\/td>\n	28<\/td>\n	16 – 31<\/td>\n<\/tr>\n
450<\/td>\n	18″<\/td>\n	400<\/td>\n	640<\/td>\n	585<\/td>\n	30<\/td>\n	20 – 31<\/td>\n<\/tr>\n
500<\/td>\n	20″<\/td>\n	445<\/td>\n	715<\/td>\n	650<\/td>\n	31.5<\/td>\n	20 – 34<\/td>\n<\/tr>\n
600<\/td>\n	24″<\/td>\n	505<\/td>\n	840<\/td>\n	770<\/td>\n	36<\/td>\n	20 – 37<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n Note: The specifications of YDK products in this catalogue may be changed without prior notice.<\/em><\/p>\n $\"Nguy\u00ean$ Operating principle of the YDK spring check valve<\/figcaption><\/figure>\n Operating principle of the YDK spring check valve<\/h2>\n The YDK spring check valve operates entirely on the hydraulic pressure difference between the valve inlet and outlet and the elastic compression force of the stainless steel spring. It opens and closes automatically, without depending on any external power source or mechanical control.<\/p>\n 1. Normal state (no flow \/ pump stopped)<\/h3>\n \n Mechanism:<\/strong> The stainless steel spring is always in an extended, pushing state, exerting a continuous compressive force on the back of the disc.<\/li>\n Result:<\/strong> The disc is pressed firmly against the seat through the EPDM\/NBR rubber seal ring. The valve remains fully closed, preventing any water from leaking or flowing back toward the pump.<\/li>\n<\/ul>\n 2. Open state (pump running)<\/h3>\n \n Mechanism:<\/strong> When the pump starts, the fluid pressure striking the front face of the disc rises quickly.<\/li>\n Opening condition:<\/strong> When the thrust of the flow overcomes the combined spring compression force plus the water pressure behind the valve, the disc is pushed back along the path of the stem.<\/li>\n Result:<\/strong> The disc lifts off the seat, creating a gap inside the valve body that lets water flow in one direction, smoothly from inlet to outlet, with minimal pressure loss.<\/li>\n<\/ul>\n 3. Closed state (pump shut off)<\/h3>\n \n Mechanism:<\/strong> When the pump is shut off, the flow velocity drops rapidly to zero. At the moment the flow pressure falls below the spring force, the spring immediately extends and pushes the disc back to press firmly against the seat. This closing takes place before the water column surges back.<\/li>\n Because the disc is already closed and sealed, the returning water cannot generate hydraulic shock (water hammer). Noise and pipe vibration are completely eliminated, and the pump impeller is protected from spinning in reverse, which could burn out the motor.<\/li>\n<\/ul>\n Buy genuine YDK spring check valves at a competitive price from An Phu Thanh<\/h2>\n To ensure effective water hammer protection and safety for fire protection and MEP piping, or building water supply and drainage systems, choosing the right reputable supplier is a must. An Phu Thanh<\/a> is proud to be the owner and exclusive distributor of YDK – brand industrial valves in Viet Nam, offering high-quality supply solutions together with the most favorable commercial terms for every project.<\/p>\n $\"An$ An Phu Thanh is proud to be the exclusive owner and distributor of YDK-branded industrial valves in Vietnam.<\/figcaption><\/figure>\n 1. Direct-from-source pricing, no middlemen<\/h3>\n As the party working directly with the manufacturing plant in South Korea, An Phu Thanh actively controls a strict quality process, from casting the GGG50 ductile iron body to PN16 pressure testing. Owning the brand allows us to eliminate intermediary trading costs, delivering the best YDK valve prices on the market, along with attractive discounts for large-volume orders.<\/p>\n 2. Complete legal documentation and fire protection acceptance inspection support<\/h3>\n Every YDK spring check valve (Model KSCX-16) leaving An Phu Thanh’s warehouse comes with a complete set of proper documentation, including:<\/p>\n \n Certificate of Origin (CO) and Certificate of Quality (CQ)<\/li>\n Detailed packing list<\/li>\n Electronic VAT invoice<\/li>\n Full catalogue and spec sheet support for preparing submittals to the Owner and the Project Management Board.<\/li>\n<\/ul>\n <\/iframe><\/p>\n<h3>\u00a03. Main warehouse with ready stock in Ho Chi Minh City<\/h3>\n<p dir=\"ltr\" style=\"text-align: justify;\">With a large-scale warehouse system in Ho Chi Minh City, An Phu Thanh always keeps the full range of YDK <a href=\"https:\/\/anphuthanhvalve.com\/en\/check-valve\/\">spring check valve<\/a> sizes, from DN50 to DN600, in stock. We commit to:<\/p>\n<ul dir=\"ltr\" style=\"text-align: justify;\">\n<li><strong>Door-to-door delivery:<\/strong> Meeting urgent supply schedules for projects under tight deadlines or emergency repairs.<\/li>\n<li><strong>Contractor protection:<\/strong> Holding fixed prices according to the signed contract for large projects spanning multiple construction phases, so contractors are protected from material price fluctuations.<\/li>\n<li><strong>Genuine warranty:<\/strong> All YDK valves carry a 12-month manufacturer warranty. In addition, customers are entitled to exchange or return goods when a technical defect from the manufacturer is found.<\/li>\n<\/ul>\n<p dir=\"ltr\" style=\"text-align: justify;\">If you are interested in the YDK spring check valve (Model KSCX-16) or other YDK industrial valves, contact An Phu Thanh now via Hotline \/ Zalo: <a href=\"https:\/\/zalo.me\/657438188627359243\" target=\"_blank\" rel=\"noopener\"><strong>0946 729 913<\/strong><\/a>! Our team is always ready to provide consultation and the most detailed quotation for you.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In booster pump stations, fire protection systems, and vertical water supply lines of high-rise buildings, the reverse pressure surge that occurs when a pump is shut off is both very fast and very powerful. To prevent this, engineers commonly use the YDK spring check valve, Model KSCX-16. This is a fast-response flow shut-off device that uses the elastic force of a spring pressing directly on the disc. The valve closes tightly the moment the flow stops, eliminating the risk of water hammer and safeguarding the entire piping infrastructure. Construction and standard dimension table of the YDK spring check valve, Model KSCX-16 Detailed product construction The YDK spring check valve, Model KSCX-16, consists of 6 main parts: Body: Cast in one piece from ductile iron GGG50, able to withstand high pressure. Both the exterior and the interior bore are coated with electrostatic epoxy powder paint to resist corrosion and extend the service life of the product. Spring: Made of stainless steel with standard elasticity, keeping the disc in the closed position whenever there is no thrust from the flowing medium. Disc: Also made of ductile iron GGG50, with a streamlined tapered (conical) profile that minimizes pressure loss as the medium passes through. Seal ring: Uses elastic EPDM \/ NBR rubber, tightly compression-molded, ensuring absolute Class A tightness with no leakage even under very low back pressure. Seat: Ductile iron GGG50 with a smooth, polished machined surface, providing the contact point that seals tightly against the disc and the EPDM seal ring. Stem \/ guide shaft: Made of SS420 stainless steel, with high hardness and wear resistance, guiding the disc to travel smoothly back and forth along the vertical axis. Dimension table of the spring check valve, Model KSCX-16 DN Size (Inch) L (Length \u2013 mm) D (Flange outside diameter \u2013 mm)<\/p>\n","protected":false},"featured_media":14808,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[402],"product_cat":[313],"product_tag":[],"class_list":["post-14804","product","type-product","status-publish","has-post-thumbnail","product_brand-y-d-k","product_cat-check-valve","pa_ap-suat-pn10","pa_ap-suat-pn16","pa_chat-lieu-cast-iron","pa_model-kscx-16","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product\/14804","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/comments?post=14804"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/media\/14808"}],"wp:attachment":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/media?parent=14804"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product_brand?post=14804"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product_cat?post=14804"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product_tag?post=14804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

Construction and standard dimension table of the YDK spring check valve, Model KSCX-16<\/h2>\n