Top Entry Trunnion Ball Valve
Top Entry ball valve
- multiple stem sealing sealant injection
- double block and bleed
- extra wall thickness
- bi-directional tight shutoff to the specified API 6D/API 598 test requirements
- low operating torques
- low-emission and pressure-assisted sealing options where specified
Top Entry Ball Valve:Product Overview
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NPS 1/2, NPS 1, NPS 1-1/2, NPS 2, NPS 3, NPS 4, NPS 6, NPS 8, NPS 10, NPS 12, NPS 14, NPS 16, NPS 18, NPS 20, NPS 24, NPS 30, NPS 36, NPS 40, NPS 42, NPS 44, NPS 48, NPS 52, NPS 56, NPS 60 |
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Class 150, 300, 600, 900, 1500 and 2500 |
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Carbon steel, stainless steel, low-temperature carbon steel, duplex, super duplex and nickel alloys such as Inconel, subject to the offered trim |
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API 6D, ASME B16.34, BS EN ISO 17292 |
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ASME B16.10 and API 6D |
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ASME B16.5 up to 24 in; ASME B16.47 Series A for larger sizes |
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ASME B16.25 |
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API 6D, API 598, BS EN 12266-1 and BS EN 12266-2 |
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API 607, API 6FA and BS EN ISO 10497 where specified |
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ISO 9001 quality system; API 6D, PED 2014/68/EU, EAC and ATEX documentation where applicable. Confirm certificate scope for the offered configuration. |
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ISO 15848 where specified |
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NACE MR0175 / ISO 15156 materials and service requirements where applicable |
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Bare stem, gearbox, hand lever, pneumatic, hydraulic, gas, gas-over-oil, motor-operated or electro-hydraulic actuator |
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Tight shutoff and seat testing to the specified API 6D/API 598 requirements; confirm the test medium, pressure, acceptance rate and project edition in the RFQ. Do not use a control-valve leakage class as a blanket rating for this pipeline valve. |
Top Entry Ball Valves: Introduction
A top-entry trunnion ball valve is designed for pipeline isolation where access to the internal components from the top can support in-line maintenance. Its removable or bolted bonnet allows inspection and service of the ball, seats and stem without removing the valve body from the line, subject to the valve design and project maintenance procedure.
For selection, confirm the line size, pressure class, temperature, medium, body and trim materials, seat design, actuator, leakage test basis and documentation package.
Top Entry Ball Valve: Industrial Applications
Top entry ball valves for steam and geothermal reinjection
After energy extraction, geothermal fluids may be reinjected into the reservoir under controlled pressure and flow. A top-entry ball valve can be considered for isolation or flow-path control where its pressure class, materials and sealing arrangement match the service.
PIG traps
Top-entry ball valves can be used for pipeline pig launcher and receiver isolation when the bore, pressure class, end connections and operating procedure are suitable for the pigging system.
Top entry for surge-relief skids
A top-entry ball valve may be selected for isolation in surge-relief skids. If automatic opening or closing is required, the actuator, control logic, fail action and pressure-setting requirements must be specified separately.
Top entry ball valve designs
Top-entry trunnion ball valves are available with full-bore or reduced-bore options, flanged or butt-weld ends, and manual, pneumatic, hydraulic or gas-operated actuation. Confirm NPS, pressure class, body and trim materials, seat design, leakage test basis and documentation package in the RFQ.
Trustful Top Entry Ball Valve Manufacturer
每日大瓜 supplies top-entry trunnion ball valve options for pipeline isolation and critical-service applications. Final selection should be confirmed against line size, pressure class, design temperature, medium, emissions target, actuator requirements and the required inspection and test documents.
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