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The design characteristics of this type of valve, makes it specially appropriate for continuous use under severe service conditions. The outer part of the valve is made up of a body and one body adapter, which together form an easily assembled and maintained valve. The stem has a milled section that fits in an area of the sphere, thus allowing an effective transmission of the torque, without the stem being directly affected by the lateral push of the sphere. The sphere is mounted on trunnions in all sizes and pressures in which this valve is manufactured. The sphere and the stem spin freely with the Teflon impregnated metal (DU) bearings that do not require lubrication. The friction coefficient is quite low, which allows easy opening and closing of the valves. The seat rings are placed over springs that exert pressure on them, and push against the sphere producing a hermetic seal even with low differential pressure. Both rings have a primary metallic seal seat and a secondary one of resilient material. All valves can be used in double block and bleed services, since its double seal allows drainage and relief of the body cavity. These valves are available in nominal diameters, from 2" to 36" in the ANSI Series 150, 300, 600, 900, 1500 and 2500 PSI. They are manufactured flanged with RF and RTJ finish as well as the welding ends. Due to its design, they weigh less as compared to other valves of its type and can also be manufactured with the metal to metal seal. They can be operated with a lever, gear, mechanical, electromechanical, hydraulic and pneumatic actuators. The valve's guarantee is estimated at 7000 opening and closing cycles, this value has been tested on prototype valves in our simulation test bank.


Trunnion ball valves specifications.
Trunnion tupe ball valves (Metal to metal seal).

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