{"id":14671,"date":"2026-09-15T03:43:16","date_gmt":"2026-09-15T03:43:16","guid":{"rendered":"https:\/\/anphuthanhvalve.com\/san-pham\/van-an-toan-ydk-model-kcv500\/"},"modified":"2026-10-17T08:05:13","modified_gmt":"2026-10-17T08:05:13","slug":"ydk-safety-valve-model-kcv500","status":"publish","type":"product","link":"https:\/\/anphuthanhvalve.com\/en\/ydk-safety-valve-model-kcv500\/","title":{"rendered":"YDK Safety Valve – Model: KCV500"},"content":{"rendered":"

In high-rise building water supply pipeline systems, fire protection networks, and booster pump stations, sudden pressure increases caused by pump shutdowns or rapid valve closure can easily lead to pipeline rupture, damage to measuring instruments, and system overload. The YDK Safety Valve – Model KCV500<\/strong> is an automatic control solution operated through a hydraulic Pilot assembly, helping discharge excess water to maintain pipeline pressure within the preset safe range.<\/p>\n

Detailed Construction of the YDK Safety Valve – Model KCV500<\/h2>\n

The following table provides a detailed breakdown of the 16 hardware components of the YDK Safety Valve – Model KCV500, based on the manufacturer’s catalog:<\/p>\n

1. Valve Body (Body):<\/strong> One-piece cast ductile iron GGG50 body with electrostatic Epoxy coating, designed to withstand high pressure and mechanical impact.<\/p>\n

2. Valve Seat (Seat):<\/strong> Made of brass with a smooth machined surface, providing corrosion resistance and a tight seal against the valve diaphragm.<\/p>\n

3. Platen (Platen):<\/strong> Made of carbon steel, supporting the valve disc.<\/p>\n

4. Seal (Sealing):<\/strong> Elastic EPDM<\/strong> rubber material providing a tight seal and preventing leakage.<\/p>\n

5. Valve Disc (Disc):<\/strong> Made of ductile iron GGG50<\/strong> with a rubber coating, moving vertically to open and close the discharge flow.<\/p>\n

6. Diaphragm (Diaphragm):<\/strong> Reinforced synthetic EPDM<\/strong> rubber that receives control pressure from the upper valve chamber.<\/p>\n

7. Platen (Platen):<\/strong> Made of carbon steel to guide the movement.<\/p>\n

8. Nut (Nut):<\/strong> Made of stainless steel.<\/p>\n

9. Stem (Stem):<\/strong> Stainless steel SS410<\/strong>, providing good wear resistance.<\/p>\n

10. Spring (Spring):<\/strong> Standard elastic stainless steel.<\/p>\n

11. Pressure Relief Pilot Valve (Pressure Relief Pilot Valve):<\/strong> Made of SS304 stainless steel, serving as the control mechanism for opening and closing the main valve according to the preset pressure.<\/p>\n

12. Valve Bonnet (Bonnet):<\/strong> Ductile iron GGG50<\/strong>, forming the control chamber above the diaphragm.<\/p>\n

13. Bolts (Bolts):<\/strong> Stainless steel A2-70 (SS304)<\/strong>, providing corrosion resistance.<\/p>\n

14. Needle Valve (Needle Valve):<\/strong> Stainless steel SS304<\/strong>, used to adjust the response speed and control flow entering the diaphragm chamber.<\/p>\n

15. Pressure Gauge (Pressure Gauge):<\/strong> Pressure gauge displaying the actual operating pressure in the pipeline.<\/p>\n

16. Globe Valve (Globe Valve):<\/strong> Stainless steel SS304<\/strong>, used to shut off the auxiliary Pilot line when inspection or maintenance is required.<\/p>\n

Dimensions of the YDK Safety Valve – Model KCV500<\/h2>\n

The following table provides the installation length and flange standards accurately extracted from the YDK catalog for engineers preparing Shop Drawings:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
DN<\/strong><\/td>\nL (mm)<\/strong><\/td>\nD (mm)<\/strong><\/td>\nD1 (mm)<\/strong><\/td>\nb (mm)<\/strong><\/td>\nn-d<\/strong><\/td>\n<\/tr>\n<\/thead>\n
50<\/strong><\/td>\n203<\/td>\n165<\/td>\n125<\/td>\n19<\/td>\n4 – 19<\/td>\n<\/tr>\n
65<\/strong><\/td>\n216<\/td>\n185<\/td>\n145<\/td>\n19<\/td>\n4 – 19<\/td>\n<\/tr>\n
80<\/strong><\/td>\n241<\/td>\n200<\/td>\n160<\/td>\n19<\/td>\n8 – 19<\/td>\n<\/tr>\n
100<\/strong><\/td>\n292<\/td>\n220<\/td>\n180<\/td>\n19<\/td>\n8 – 19<\/td>\n<\/tr>\n
125<\/strong><\/td>\n330<\/td>\n250<\/td>\n210<\/td>\n19<\/td>\n8 – 19<\/td>\n<\/tr>\n
150<\/strong><\/td>\n356<\/td>\n285<\/td>\n240<\/td>\n19<\/td>\n8 – 23<\/td>\n<\/tr>\n
200<\/strong><\/td>\n458<\/td>\n340<\/td>\n295<\/td>\n20<\/td>\n12 – 23<\/td>\n<\/tr>\n
250<\/strong><\/td>\n530<\/td>\n405<\/td>\n355<\/td>\n22<\/td>\n12 – 28<\/td>\n<\/tr>\n
300<\/strong><\/td>\n600<\/td>\n460<\/td>\n410<\/td>\n24.5<\/td>\n12 – 28<\/td>\n<\/tr>\n
350<\/strong><\/td>\n675<\/td>\n520<\/td>\n470<\/td>\n26.5<\/td>\n16 – 28<\/td>\n<\/tr>\n
400<\/strong><\/td>\n730<\/td>\n575<\/td>\n525<\/td>\n28<\/td>\n16 – 31<\/td>\n<\/tr>\n
450<\/strong><\/td>\n720<\/td>\n635<\/td>\n585<\/td>\n30<\/td>\n20 – 31<\/td>\n<\/tr>\n
500<\/strong><\/td>\n790<\/td>\n710<\/td>\n650<\/td>\n31.5<\/td>\n20 – 34<\/td>\n<\/tr>\n
600<\/strong><\/td>\n970<\/td>\n840<\/td>\n770<\/td>\n36<\/td>\n20 – 37<\/td>\n<\/tr>\n
700<\/strong><\/td>\n1120<\/td>\n910<\/td>\n840<\/td>\n39.5<\/td>\n24 – 37<\/td>\n<\/tr>\n
800<\/strong><\/td>\n1200<\/td>\n1025<\/td>\n950<\/td>\n43<\/td>\n24 – 40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Product specifications for YDK products in this catalog are subject to change without prior notice.<\/em><\/p>\n

Operating Principle of the KCV500 Safety Valve<\/h2>\n

The KCV500 Safety Valve operates fully automatically through the force balance between the spring force of the SS304 Pilot and the fluid pressure in the pipeline:<\/strong><\/p>\n

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  1. \n
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    1. Normal State (Pipeline Pressure \u2264 Set Pressure):<\/strong>\n