The grabcad library offers millions of free cad designs, cad files, and 3d models. Following a major expansion of our valves and controls business, emerson has reinforced its final control. Join the grabcad community today to gain access and download. Double block and bleed valve is a sideentry ball valve, with either a bolted or welded body, designed for use in upstream, midstream and downstream oil and gas applications. A bleed valve is used to drain the spool and verify seal integrity. This feature can be achieved with one single valves cw a bleed port between the obturators. Free dbb expert guide specification for pipeline and piping. Improve protection and isolate large equipment areas safely by specifying valvtechnologies valves with double block and bleed capability. You dont want to shut down the entire facility, so you decide to block off and depressurize just the section youre working on. Double block and bleed valves for double isolation in steam.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Some details would be interesting to see unless you mean the integrated double valve body type thing. According to api 6d specification for pipeline valves standards, a double blockandbleed dbb valve is a single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve, with a means of ventingbleeding the cavity between the seating surfaces. Swagelok process interface valves and process monoflanges can be configured to suit a variety of special applications. High pressure equipment company introduces its double block and bleed needle valves that deliver safe, reliable operation to 20,000 psi. Double block and bleed ball valves on parker autoclave. Dbb valves can therefore replace an existing ball valve or double block and bleed valve. Api defines dib as a single valve with two seating surfaces, each of which, in the closed position, provides a seal against pressure from a single source, with a means of ventingbleeding the. These savings can be as much as 60% in weight and studies have shown that a 70%. The valves made of different materials are suitable for various media such as water. Some solid reasons to buy double block and bleed valve kplok.
Grove b4, b5, and b7 sideentry ball valves cameron. Double block and bleed valves have evolved to replace the process of bolting together individual valves to provide dual isolation. Over 100 000 double block and bleed and monoflange valves installed. Email this page download pdf download pdf printable page. Suitable discharge piping with isolation valves and end plug suitable adaptor for extension purpose, shall be provided so that the released liquid from each bleed valve can. The company liability covers eventual free of charge. Manually operated bleed valves are to be provided on the valve that can be opened to verify that the valves are not leaking when in the closed position.
Applications hoke block ball valves hoke blocks are used as a primary processpiping isolation valve to provide double block and bleed. Applications a single double block and bleed valve can do the job of two conventional singleseated valves. The bleed and vent valves ensure that fluid is drained from the cavity between the seals and to drain any fluid downstream of the process stream. Double block and bleed ball valve double fixed balls hinged on supports, and floating metal or soft seats. It also cuts down the number of leak paths to the atmosphere, reducing the risk of hazards when transferring liquids dangerous to humans or the environment. Double block and bleed flanged products parker hannifin.
China double block and bleed trunnion ball valve china dbb. Heavy duty needle type globe valve is designed and tested to fire safe standards, ensuring bubbletight shutoff on venting or isolation service. Double block and bleed valves with floating balls and soft seats. From the closed position, these valves cannot be opened under pressure unless pressure balance option is. B double block and bleed ball valves are designed and manufactured strictly to international standards asme b16. For double block and bleed design, trunnion or floating type, special body design without flanges results in a very short endtoend dimension. Standard ball valves are furnished in 316 ss with specials materials available. The bleed valve can also be opened to demonstrate the integrity of the isolation i. This full port quarter turn double ball valve is designed for operation up to 15,000 psi 1034 bar. It is often the case that 2 separate parallel slide gate valves are utilised for this function, however these valves may be several hundred yards apart with steam takeoff points. In addition to double block and bleed assemblies, single block and bleed, and block combinations are available. See catalogue 4190hbv hipro ball valve for high performance. Ce marking in compliance with ped directive 9723ec. This ball valve is used through out the range of double block and bleed, single block and bleed and block valves illustrated within this catalogue in various.
Having dbb for drains can seem a bit ott, especially if youve got positive isolation blind flange on. Full bore we offer a real full bore valve according to api 6d iso 143. Double block and bleed valve 3d cad model library grabcad. Carbon steel double block and bleed valves have stainless steel end. Designed and tested as standard to be fire safe and antistatic. Defining double block and bleed pipe, valve and fitting. Double block and bleed ball valves parker autoclave engineers.
Double block and bleed valves dbb are used in the process industries to provide double isolation for additional safety such that the upstream fluid does not reach the downstream plant equipment. Join 5,080,000 engineers with over 3,040,000 free cad files join the community. Expanding plug valve is a well recognized brand and accepted by most of the. Is the 34 valve really a double block and bleed ball valve. As shown above, two pairs of conventional valves must be used for block and bleed service in a fuel oil and gasoline storage system. Process interface in one compact ballneedleball valve assembly. Compact design double block and bleed fluitek orsenigo can meet all the requirements coming from the customer, including the need of valves with reduced dimensions and weight.
Body construction can be either forging or centrifugal casting. Single and double block and bleed valve 7 ordering information two piece bolted design. Equipment and process standardization improves tco. The proveninthefield valvtechnologies package approach lowers installation costs and saves time compared to individual component assembly. The primary valve will be connected to a secondary instrument valve. Its time to do maintenance on a section of process.
Central needle vent valve size ranges from 12 through 12, large sizes on request. Using a single double block and bleed valve system versus 3 separate valves saves installation time, weight on the piping system, and space. When looking for a double block and bleed valve always consider that the dbb. Double ball valve in either cartridge ap1 6d single valve dimensions or special dimensions. Keyblok double block and bleed valve isolation flotech inc. The flanged body drop forging is machined to ansi b16.
Double block and bleed needle valves high pressure. Primary isolation ball valves are precision machined and super finished for high performance pressure and temperature ratings. Dbb ball valve, double block and bleed ball valve, ball valve manufacturer supplier in china, offering double block and bleed trunnion ball valve, high pressure flat plate gate valve, api 6d 150lb wcb a216 slab gate valve and so on. The integrated and compact designs along with a precise construction of double block and bleed valve make them a highly reliable solution for complicated multiple instrument valve systems. Mar 18, 2016 the cosasco double block and bleed service valve is designed to provide an extra layer of protection to ensure maximum safety requirements are met. Parker hannifin corporation flanged products 3 primary, secondary and vent valve applications and installations design codes all parker hannifin double block and bleed designs comply with the following codes. Compact design double block and bleed ball valves fluitek. Email this page download pdf download pdf printable page close window note. When assured valve shut off and absolute isolation are required, dafram provides double block and bleed valves that consist of two main inline isolation valves and a bleed valve, used to drain or vent trapped fluid between the two obturators. The double block and bleed valve is used to cut off or connect the media in various of class150class2500. The stem is a free member and carries no side thrust. The double block and bleed system requires the use of two valves and a spool piece. Improve maintenance safety with double block and bleed valves. True meaning of double block and bleed valve magazine.
The design provides an effective method for mounting gauges with facility to test and calibrate gauges and pressure switches. Parker probloc 2 a onepiece integral forging incorporating up to 3 ball valves or mixture of ball and needle design. Double block and bleed valves bonney forge corporation. Double block and bleed flanged products royal instruments. It requires two inline isolation valves and a bleed valve used to drain or vent trapped fluid between the two closure elements in order to safely isolate the downstream pipe. Double block and bleed ball valves fluitek orsenigo valves. A welded flange, connected to a primary ansi class isolating valve. A pressure gauge or transmitter will then be installed downstream of the instrument valve. We are a wellknown as double block bleed valve manufacturers, please find above 9. Double block and bleed ball valves are aimed to get a double barrier on the piping, and bleed the fluid trapped between the two balls from a dedicated drain line.
Our valves feature coned and threaded connections for 14 to 1 medium pressure tubing, making them ideal for pressure monitoring and testing, chemical injection and drain line isolation applications. Other materials available for full fluid compatibility range. Valves are typically used on hydrocarbon applications to minimize the size and weight of the pipevalve assemblies associated with gauge pressure or analytical instrumentation. This article, on the true meaning of double block and bleed initially ran on june 1, 2010. The double block and bleed isolation philosophy requires two inline isolation valves and a bleed valve, used to drain or vent trapped fluid between the two closure elements in order to safely isolate safely the downstream pipe. Valves 1 contents primary isolation valve applications. This article will be a guide about the system of double block and bleed valves, their types, applications, working, features and function. The advanced features incorporated onto our range of floating and trunnion ball valves are also designed into these double block and bleed valves. All parker hannifin double block and bleed designs comply with the following codes. A onepiece integral forging incorporating up 3 ball valve or mixture of ball and needle design. These features are requirements by end users such as petrobras, aramco, bp and pemex which includes iso 158481,2 fugitive emission tests. This new assembly provides great savings in weight, space and installation times especially in instrument or instrument cage isolation.