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Engineered for exacting fluid isolation demands, this cast carbon steel top-mounted ball valve delivers uncompromising control across critical pipeline infrastructures. Manufactured in strict accordance with API 6D and ASME B16.34 international standards, the valve body presents a substantial, heavy-walled cast steel construction that feels incredibly solid to the touch. This robust architecture is specifically designed to absorb intense pipeline vibrations and thermal fluctuations commonly found in petrochemical processing, power generation plants, and long-distance transmission lines.
The valve features an advanced top-mounted design, allowing engineering teams to perform internal maintenance without removing the unit from the pipeline, significantly reducing system downtime. Valves equipped with integrated anti-static devices actively prevent the accumulation of static electricity, providing a crucial safety measure for hazardous, combustible environments. Highly resilient O-ring seals create a secure, leak-proof barrier, adapting to micro-variations in the metal to prevent fugitive emissions. Furthermore, self-venting seats and precision-machined soft seat inserts offer a slight, yielding tactile resistance upon closure, confirming a bubble-tight seal and ensuring continuous operational safety under varying pressure conditions.
● Anti-Static Device: Engineered with a specialized grounding spring mechanism that produces a reassuring mechanical contact, this feature continuously dissipates static electricity generated by fluid friction, dramatically improving operational safety in flammable environments.
● O-Ring Sealing System: Utilizing highly resilient elastomeric materials, the O-rings provide a reliable, leak-proof seal. When compressed, the material adapts perfectly to the valve stem, ensuring safe and efficient fluid isolation against volatile media.
● Soft Seat Insert: Precision-machined soft seat inserts deliver enhanced sealing capability. This design ensures a tight, secure closure, minimizing the possibility of liquid leakage even under fluctuating pipeline pressure differentials.
● Top-Entry & Welded Ends Integration: The one-piece body with a top-entry access port allows maintenance crews to extract the internal ball and seat assembly directly from the line. Combined with fully welded ends, it eliminates flange leak paths and slashes system downtime.
● ISO 5211 Actuator Platform: A standardized mounting pad is cast directly into the upper bonnet. This allows for rapid, secure installation of pneumatic, electric, or manual gear operators, facilitating immediate integration into automated control networks.
Item | Part. Name | Material |
1 | Bonnet | PE |
2 | Extension pipe | st37 |
3 | Body | st37 |
4 | Flat washer | st37 |
5 | Butterfly Spring | 60Si2MnA |
6 | Ball seat | SS202 |
7 | O-ring | EPDM |
8 | Ball washer | PTFE+20%C |
9 | Ball | SS304 |
10 | Stem washer | PTFE+20%C |
11 | Stem sleeve | st37 |
12 | Stem | SS410 |
13 | Stem ring | PTFE+20%C |
14 | Stem O-ring | FPM |
15 | Sleeve | st37 |
16 | Positioning PIN | ASTM1035 |
17 | Handle | st37 |
18 | Washer | Q235A |
19 | Nut | Q235A |
20 | Handle cap | ABS |
Operational safety relies on verifiable data and rigorous quality control. Before any unit leaves the manufacturing facility, it undergoes 100% hydrostatic and pneumatic sealing tests in strict accordance with API 598 protocols. The Q340 H-16C and H-25C models are subjected to intense strength tests using water at 2.4 MPa and 3.75 MPa respectively, ensuring the cast steel shell exhibits zero deformation under extreme stress. Enclosure tests confirm bubble-tight shut-off capabilities. Designed to handle water, vapour, and oil mediums, these valves maintain structural integrity and exceptional sealing performance across a broad temperature range from -40ºC up to 200ºC, making them highly adaptable for challenging climate installations.
Type | Nominal pressure(MPa) | Testing pressure | Suitable temperature(°C) | Suitable medium | |
Strength (water) (MPa) | Enclose (Water) (MPa) | ||||
Q340 H-16C | 1.6 | 2.4 | 1.76 | -40~200ºC | Water,Vapour,Oil |
Q340 H-25C | 2.5 | 3.75 | 2.5 | ||
The visual profile of the valve instantly communicates its industrial readiness and structural integrity. The exterior features a thick, uniform protective coating that guards against aggressive atmospheric corrosion, ensuring longevity even in exposed outdoor installations. Examining the connections, the precisely beveled welded ends are machined to exact tolerances, allowing for seamless and immediate pipeline integration without the need for additional flange alignment. The top-mounted bonnet assembly is secured with heavy-duty industrial bolting, presenting a clean, accessible layout. Running a gloved hand over the cast steel body reveals the substantial wall thickness, confirming its ability to withstand extreme internal pressures and external mechanical impacts typical in heavy engineering environments.
Q：How does the antistatic device improve safety?
The antistatic device utilizes a specialized spring-loaded mechanism that creates a continuous electrical path between the ball, stem, and valve body. This safely grounds the unit and helps prevent the buildup of static electricity caused by fluid friction, which can be a severe fire or explosion hazard, especially in flammable environments handling volatile oils or gases.
Q:What does the self-relieving seat do?
The self-relieving seat automatically relieves excess pressure build-up trapped in the body cavity behind the ball. When cavity pressure exceeds the pipeline pressure, the seat slightly flexes away from the ball, venting the pressure safely back into the line, maintaining optimal sealing performance and preventing potential shell rupture.
Q: Can the internal components be replaced without cutting the pipeline?
Absolutely. The top-entry design allows maintenance personnel to unbolt the bonnet and lift out the entire ball and seat assembly directly from the top. The welded ends remain permanently attached to the pipeline, drastically reducing maintenance hours and eliminating the need for pipe cutting or re-welding.
Securing reliable fluid control in demanding industrial sectors requires components engineered for absolute certainty. Our cast carbon steel top-mounted ball valves are specifically engineered for reliable fluid control and safe containment, suitable for demanding industrial applications. Equipped with advanced features such as anti-static devices, self-pressurizing seats, and soft seat inserts, they offer unparalleled performance and safety. The top-mounted design and welded connections simplify maintenance, ensuring minimal downtime.
Beyond standard manufacturing, we provide comprehensive engineering support, offering OEM and ODM customization for special alloy bodies, cryogenic applications, and non-standard dimensions tailored to specific project requirements. Quality assurance is embedded in every step, utilizing Non-Destructive Testing (NDT) to verify the internal soundness of the cast steel. Furthermore, each heavy-duty valve is carefully treated with industrial rust preventatives, fitted with protective end caps, and secured inside export-grade, fumigation-free plywood boxes. This meticulous packaging ensures that when you open the crate, the distinct scent of fresh timber and machine oil confirms your equipment has arrived in pristine condition. Choose our valves to provide you with key system solutions that ensure efficient operation, easy maintenance, and enhanced safety.
