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NPT double block and bleed valve
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TEL:086-21-39507027 
FAX:086-21-62954830
Product Sort:Ball valve>>double block and bleed valve
Pressure:150LB-1200LB
Size:DN15-DN100
Design Std:API,DIN,BS,GB,JIS,EEMUA
Product Material:A105 WCA,WCB,WCC, LCB, LCC, WC6, WC9, C5, C12, CF8, CF8M, CF3M, CF8C, CK20, CN7M, CD4MCu, CK3MCuN, Cu5MCuC, CN3MN, M35-1, MONEL400, MONEL500, CY40, CW6M
page keywords:ball valve,A105 ball valve,ss316 ball valve,three way ball valve,PVC valve,dbb valve,double block and bleed valve
NPT double block and bleed valve(dbb valve)
Double block and bleed valve ,UPVC ball valve ,UPVC globe valve,UPVC diaphragm valve UPVC BUTTERFLY VALVE,With the development of society, their market will become larger,So our company will produce the products,Look below of the DBB valve.
This is the samll dimension DBB valve with flange and threaded connection. ,The double block and bleed valve is also called DBB valve, generally say, it is make up by two ball valve and one neddle valve or two ball valve and a globe valve.
Why some conditions use the Double Block and Bleed valve?
Double Block and Bleed valves have evolved to replace and add the process of bolting together individual valves to make the valves in one body.it saved a lot of space and meterial, it is the development tendency of the valve in the future.
These new assembly of the double block&bleed valve provides great savings in weight, space and installation times especially in cage isolation. These savings can be as much as 70% in weight and shown that it can saving 70% installation time on the projects. However the greatest savings , therefore reducing the risk of the potential hazards this entails such as leak or insecure.
Dual ball is a necessary requirement when maintenance is taking place down stream of the first isolation valve.
These double bllock and bleed valves have also evolved to encompass the function of chemical analysis and mechanical character. Cavity venting is provided by either two balls or globe OS&Y vent relief valve so that the pressure between the two isolation valves can be safely vented.
All DBB valves are manufactured to the standrad.
Double Block and Bleed valves detail data
Manufactured accordance with the recognised standards including GB, JIS, API6D, API607,BS6755PT2,EEMUA 182 latest revision,API up to 10000 and 15000 PSI.
Trunnion mounted,fixed ball, floating ball, and sevrial variants of gate valve, globe valve, check valve,and ball valve.
Special designs including injection quills, sample probes, double block and single block, in-built check valves and seat wipers.
Tested temp from -52 degree C to +300 degree C depend on different meterial.
