Top Entry Ball Valve

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Product Description
Naibang top entry ball valves are designed according to API6DSS, API6A, API17D with the addition of customer requirements when present. The valves do not rely on lubricant or grease to assist sealing between the ball and seat. Metal-to-metal sealing is used between the ball and seat and non-elastomeric seal are provided between the seat and body. Metal-to-metal sealing is also provided between body-to-bonnet and stem-to-body (optional).
The top entry ball valve standard configuration is soft seated trunnion mounted with self-relieving seats, anti-blowout stem, antistatic device, fire-safe certified. To comply with technical requests they can be provided with particular features as double block and bleed, double piston effect construction, stem extensions, secondary tightness injection fittings, metal seats, transition pieces and/or pup pieces, special face to face dimensions and bore sizes (piggable), PTFE spring energized lip seals in case of cryogenic applications or hazardous fluids.
These valves have complete flexibility in the use of materials for body and trim along with seal gasket selection. For this reason, they are suitable for the most severe applications which can be encountered onshore, offshore and in the process industry.
top entry ball valve bonnet-body construction allows the use of different grades of carbon steel, stainless steel and exotic alloys thus complying with the most severe service conditions. Top-entry construction is also available for special applications.
Product Range
Nominal Diameter: 1/2"-56"?DN15-DN1400?
Pressure Range: Class 150-900LB?PN16-PN100?
Working Temperature:-196?-+560?
Body Materials? Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Trim? Carbon Steel, Stainless Steel, Duplex Steel
End Connection?RF, BW

Basic Characteristics
API6DSS, API6A, API17D design as requested
Bi-directional sealing
Spring loaded metal-to-metal seats (tungsten carbide coating 0.2mm – 0.4mm thickness)
Anti-blow out design stem
Non-elastomeric seals to avoid the risk of gradual degradation of the seals over their life
Full metal-to-metal sealing at body-bonnet and valve stem
Forged material to comply with API6A PSL3
Valve actuation with dedicated hydraulic actuator and ROV operable Gearbox (fixed or retrievable) url:

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Offered by
Zhejiang Naibang Valve Co., Ltd

Wenzhou (China)


Manufacturers, Trader & Exporter/Importer



About Company

Zhejiang Naibang Valve CO., LTD, is located in the hometown of pump valve - Oubei Town Wenzhou City Zhejiang Province.Founded in 2000, is a professional valve manufacturer integrating design, technical development, produce and sale service, has a solid strength and rich production experience. Over the years,our enterprise is always adopting others' strong points, keeping innovation, exploitation, insisting on quality first and sincere principle as enterprise tenet, manufacturing high quality products with an utmost fast speed, satisfying the requirement of national and oversea clients for high technology. Nowadays, our company is manufacturing many kinds of valves such as API, ANSI(USA), BS(Britain), DIN(German), JIS, JPI(Japan), GB, JB(China), and various nonstandard products which are widely used in oil, oil refining, chemical industry, power plant, boiler, metallurgy, electric power They have good market in all around the world and they are well received by customers. In recent years, the products are exported to the United States, France, Italy, Malaysia, India, Nigeria, Spain and other countries around the world, has been widely used in oil, oil refining, chemical industry, power plant, boiler, metallurgy, electric power and other industries both at home and abroad , well received by customers. The company has many sets of excellent mechanical processing equipments and modernized inspection & testing equipments used for our main products: ball valve, check valve, forged valves, gate valve, globe valve, butterfly valve, strainer and so on. Nominal size (NPS):1/2"-60"(DN15~-DN1500); Nominal pressure (Class): 150Lb-2500Lb(PN1.0Mpa~PN42.0Mpa); Working temperature: -101?- 680?, Main material include carbon steel,SS304,SS304L,SS316,SS316L,low temperature steel,dual phase steel(F51/F55),aluminium bronze,titanium alloy,Inconel,20# alloy,chrome alloy, etc. In order to provide customer high-quality and better service, the company has equipped the system certification such as API6D, CE, ISO9001, TS, ect. Our persistent management tenet is based on continuous exploitation,strict quality control,favorable price and complete service.Sincerely welcome to vast new and old clients to visit and cooperate with a view to commonly developing a brilliant tomorrow.. view more »

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