BACK PRESSURE VALVE (INSIDE BOP/ GRAY VALVE) is a heavy-duty drop check valve that is positioned in the drill string to control formation pressure during kicks. It controls the backflow through the inside of the drill pipe itself, preventing damage to the swivel, drilling hose, standpipe and circulation equipment. During normal circulation of drilling fluids down the drill pipe, the valve remains open to permit the flow through it. A conical plug, or dart, minimizes the erosive action of the drilling fluid on the valve seat and assures a long lasting seal between the valve dart and valve seat.When any backflow occurs, the valve closes automatically to contain it, protecting the drilling equipment as well as controlling the kick that could otherwise lead to a blowout.
Ball Type Full Opening Safety Valve is designed to be stabbed into the top joint of drill pipe or tubing at the rig floor and closed quickly in case a well kicks. After weight material is added to the mud, the Kelly can be reconnected, the safety valve opened, and circulation initiated.
Like the Kelly valve, the Safety Valve is full opening. The ball-type design permits the valve to be compact, easy to handle, and yet have great strength. Standard test pressure is 10,000 pounds, but higher pressure ratings are available.
Description: Full Opening Safety valve is a manual control ball type safety valve used to stop flow through the drill string. FOSV assembled between lower Kelly sub and upper drill pipe sub. In the drilling operation, in order to avoid malignant accidents, the FOSV shall be connected between drill pipes in drilling process. It can be opened or closed off by simply turning a special operating wrench 90° according to indicated direction.
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Boat valve Inflatable Boat Air Valve Raft Dinghy Kayak Canoe air valve PVC Boat Air Nozzle Valve grey valves Features: * Inflatable boat safety air valve. Easy inflate and Deflate *Made of high-quality materials, durable *Comes in three parts: Vave base, Valve core and valve cap *suit for all inflatable boats, river rafts,canoe, rigid inflatable boat,banana boat, air mat,kayaksand so on.l *Double seal leak protection Specification: *Material: PVC *Color: Grey(as shown in the picture) *Size:As picture show (approximately) Package content: 2pcs *Inflatable Boat Air Valve
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safety relief valve DN 20 valve body bronze valve seat and spring brass operating temperature -200 ------+250
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Product : Valves Brand : Renaissance Pipe Fitting Inc. Sizes : Refer the specification Condition : New Rating : 4.6, based on 112 reviews price : Start from 5 USD RFP India is Indias wellknown manufacturer supplier and exporter of Valves which is a device that regulates directs or controls the flow of a fluid gases liquids fluidized solids or slurries by opening closing or partially obstructing various passageways Valves are technically valves fittings but are usually discussed as a separate category In an open valve fluid flows in a direction from higher pressure to lower pressure It is being made up from different materials like Stainless Steel Carbon Steel Alloy Steel Gun Metal Brass Bronze Forge Cast Iron Cast Steel and Mild Steel Meanwhile Valves are quite diverse and may be classified into a number of basic types such as Ball Valve Butterfly valve Ceramic Disc valve Check valve Choke Valve Diaphragm valve Gate valve Globe valve Knife Valve Needle Valve Pinch Valve Piston Valve Plug Valve and so on
