Valve dimensions and operators 9 material example metal seated 3piece body trunnion mounted ball valves t60m series1 14 component drawing 15 design features 16 construction and materials 17 valve dimensions and operators 19 pressuretemperature ratings 21 engineering data 22 dimensions of actuator mounting pads 24. Its time to do maintenance on a section of process. Very reduced dimensions and weight dbb plug valves design features. The double block and bleed isolation philosophy requires two inline isolation valves and a. Double block and bleed function ball seats independently shut off the line fluid on the upstream and downstream side of the ball. Hawa valves can meet all the requirements coming from the customer, including the need of valves with reduced dimensions and weight. The double block and bleed dbb cameron general valve twin seal plug valve reduces this constant wear by using two seating slips mounted independently on a tapered plug by dovetails, which mechanically retract from the seating surface prior to rotating. The taurus series are basically full bore valves but are also available as reduced bore design. A double block and bleed valve is like having three valves in one. This will result in huge space saving and weight which are positive benefits for fpsos and oil platforms. Valves are typically used on hydrocarbon applications to minimize the size and weight of the pipevalve assemblies associated with gauge pressure or analytical instrumentation. Double block and bleed, ball needle ball configuration, trunnion mounted valve manifold utilising soft and metal to metal seating, using the latest in piston seat design, with flange to body connection for superior, bubble tight sealing capabilities at both high pressures and temperatures.
Double block and bleed valves have evolved to replace the process of bolting together individual valves to provide dual isolation. With the need for verifiable and maintainable shut off in safety critical applications, double block and bleed valves have commonly been used for primary and secondary tight shut off, in an attempt to provide and ensure system integrity. Double block and bleed ball valves parker autoclave. Double block and bleed isolation vents and drains extreme service over 100 000 double block and bleed and monoflange valves installed. The dualsafe unit incorporates two main isolation valves and one bleed valve in a single body construction. The valves are reliable and they last we have made swagelok double block and bleeds our standard and will be adding more during our next shutdown 26 in. Double block and bleed lined valve, ball valve, gate. Ball valve floating a182 f51 double block and bleed plug and ball valves ball valve low temperature 23. Gate valves with flexible wedges and with body or bonnet bleed valve can serve this purpose if specifically tested in accordance with api598 for double block and bleed quality valves. Applications hoke block ball valves hoke blocks are used as a primary processpiping isolation valve to provide double block and bleed. This new assembly provides great savings in weight, space and installation times especially in instrument or instrument cage isolation. Our double block and bleed dbb valve range allow you to positively isolate both sides of the valve with a bubbletight seal, and vent any excess medium through a needle valve. V3 flange to 12 nptf designator f flange to flange designator ff single block and bleed designator s double block and bleed designator d.
This compact double block and bleed design negates the need for using two valves in series. For double block and bleed design, trunnion or floating type, special body design without flanges results in a very short endtoend dimension. As a consequence the valve can easily be installed into an existing pipeline without the need for. Double block and bleed flanged products royal instruments. Double block and bleed ball valves rays flow control. Ve designs and manufactures high integrity double block and bleed dbb dual expanding plug valves for storage terminals, refineries, bulk loading, naval and aviation as well as refuelling and metering systems. True meaning of double block and bleed valve magazine. Locking device on every valve balon series t valves, like all balon gear operated valves, feature standard locking devices in all sizes. The valves are offered in a combination of materials and actuation options to suit customer requirements.
Stainless steel instrumentation isolation block and bleed. We provide largediameter valves for use in natural gas, lng, crude oil, and refined products transmission lines as. This special construction offers the lowest possible number of potential leakage points from a process connection and reduces the overall valve envelope size and weight by integrating valves, piping, and fittings into one compact design. With the need for verifiable and maintainable shut off in safety critical applications, double block and bleed valves have commonly been used for primary and secondary tight shut. Double block and bleed valves valve valve valve postbus 50041, 5 aa almere. 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. Double blockandbleed whether in the fully open or fully closed position, pressure on each side of the ball is blocked from the body cavity by the seat ring. Api 6d defines a double block and bleed valve as 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 vendingbleeding the cavity between the. Oliver twinsafe offer a range of valves in either full or reduced bore sizes, in asme pressure. 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.
Model 790 double block and bleed valves chemvalve has an innovative design for your double block and bleed needs. All units can be fitted to a single valve body, providing a compact, lower weight solution. Full bore we offer a real full bore valve according to api 6d iso 143. The length of a single block ball valve is specified in asme b16. Standard ball valves are furnished in 316 ss with specials materials available. The manufacturing plant in bilbao spain is iso 9001 licensed and manufactures valves that are pedce certi. About franklin valve franklin valve manufactures the duraseal double block and bleed plug valve. Double block and bleed valves bonney forge corporation. These savings can be as much as 60% in weight and studies have shown that a 70%.
The range of primary isolation double block and bleed valves meets both instrument and piping engineers specifications, offering significant savings on space, weight, installation and cost. Cameron fully welded ball valves control associates. Double block and bleed monoflange valve manifold with flanged inlet, with threaded outlet and vent. The wb valves offer an industry standard flanged inlet connection and a screwed vent and outlet connection to suit any instrumentation take off requirement. Some ball valves and nonlubricated plug valves, when equipped with a valve body bleed between the seats, can also be satisfactory substitutes for double block. Double block and bleed ball plug valves dual trunnion. Double block and bleed ball valves high pressure company. Single and double block and bleed valve 7 ordering information two piece bolted design designator.
Sealing is achieved by spring loaded piston type seats which shut off flow when line pressure acts on the upstream seat. Double block and bleed ball valves parker autoclave engineers. When you blockandbleed a cameron ball valve, the following can be accomplished. Just upstream is a double block and bleed valvea trunnionmounted ball valve with selfrelieving seals and a bleed valve to vent the cavity. The purpose of the block and bleed manifold is to isolate or block the flow of fluid in the system, so the fluid from upstream of the manifold does not reach other components of the system that are downstream, then bleed off or vent the remaining fluid from the system on the downstream side of the manifold. With the advantages of triple offset butterfly valves, hobbs valve engineered a solution that would utilises a threepiece valve assembly manufactured within a one piece cast body, saving considerably on weight when compared to alternative double block and bleed solutions. Keyblok double block and bleed valve isolation flotech inc. Double block and bleed ball valves high pressure equipment has designed a trunion style block and bleed ball valve for calibration applications to 15,000 psi. The upstream and downstream seals provide the same function as the two block valves. Soft seated 3piece body trunnion mounted ball valves f18tkt60 series. Applications duraseal is an excellent choice for applications that require frequent isolation and testing of gas or liquids.
Double block and bleed ball valves are aimed to get get a double barrier on the piping, and bleed the fluid trapped between the two balls from a dedicated drain line. Trunnion ball valve special features balon corporation. Oliver twinsafes established range of double block and bleed dbb large bore pipeline ball valves will increase operator safety with true double isolation, whilst saving space and weight, reducing potential leak paths and minimising maintenance requirements, on both new and existing pipelines. This reliable ball valve is an excellent method to block and bleed high pressure hydraulic and pneumatic systems used for pressure monitoring and test, chemical injection and drain line. When creating the design specification for our taurus series we came along the point face to face dimensions. Plating as standard with painting options available. This feature can be achieved with one single valves cw a bleed port between the obturators. The body cavity can then be bled down or drained through the body port. Valve dimensions and operators 9 material example metal. Primary and secondary isolation valve are, as standard, ball type valves with floating ball or trunnion ball design, the bleed valve can be provided as integral needle type valve.
This compact double block and bleed design negates the. The valves should always be either fully open or fully closed. Every balon series t includes a bleed fitting for double block and bleed, and every valve allows grease injection for secondary sealing. Feature forging body trunnion or floating type anti blowout stem and typically spe seat design. Bleed dbb plug valves in sizes up to 42 1050 mm, and in asme. The double blockandbleed system as shown above required the use of two. Stainless steel instrumentation isolation block and bleed valve, 12 in. Ball valves are intended to be used as onoff flow control devices and are not to be used to throttle fluid flow. Double block and bleed ball plug valves dual trunnion mounted. The double block and bleed system as shown above required the use of two. It includes options for highpressure, critical processes, such as our xc range, which are all api 6a tested and manufactured in accordance with asme standards.
A dbb or dib valve can perform the tasks of 3 separate valves knowing 2 separate isolations and 1 drain valve. You will get all the advantages of the model 790eb fully lined plug valve but suitable for true double block and bleed requirements for isolation. Every balon series t includes a bleed fitting for doubleblock andbleed, and every valve allows grease injection for secondary sealing. Rapid seal abrasion is inherent in the designs of most ball and gate valves. Valves are typically used on hydrocarbon applications to minimize the size and weight of the pipevalve assemblies. Available in sizes from 38 up to 16, and pressures up to 15,000psi. The twin seal valve is an alternate to this original twovalve system with just one doubleseated bubbletight valve.
With features such as double block and bleed capabilities, secondary sealant injections, and spring energized self relieving seats, the scv design offers many features and options beneficial for oil, gas, and liquid applications making it one of the most preferred ball valves on the market. Api 6d defines a double block and bleed valve as 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 vendingbleeding the cavity between the seating surfaces. Your benefits at a glance highquality materials use of highquality materials for maximum performance. Double block and bleed ball valves, process ball valves. Global valve and controls trunnion ball valves, double. The body serving as a spool piece bleed verifies seal integrity. The purpose of the block and bleed manifold is to isolate or block the flow of fluid in the system, so the fluid from upstream of the manifold does not reach other components of the system that are downstream, then bleed off or vent the remaining fluid.
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