DN50 (2″) Class 150 Al-Bronze Flanged Floating Ball Valve BL357502

Our custom process:

1. First, we will confirm your requirements (temperature, pressure, medium, connection standards, special requirements, etc.).
2. After confirming the requirements, our engineers will go through several rounds of design and modification to produce a technical solution (2D/3D drawings, material list, finite element strength verification);
3. We will next confirm with you whether the design solution meets the requirements and make adjustments according to your suggestions;
4. After you fully confirm, we will carry out production and quality inspection (full-size inspection, PMI material re-inspection, liquid/gas pressure test, low leakage test), or send the product to the third-party testing institution you specify for quality inspection;
5. Delivery documents: factory certificate of conformity, material certificate (EN 10204 3.1/3.2), test report, installation operation and maintenance manual (O&M), and 3D model.

• Full-port: The ball bore matches the pipe inner diameter, creating no additional pressure drop. Ideal for pressure-drop-sensitive systems (e.g., pump discharges, metering sections).
• Reduced-port (typically one or two sizes smaller): Lower cost, but introduces a pressure drop of roughly 10–30%.
• We provide Cv value tables or use simulation software to recommend the correct size based on flow rate and allowable pressure drop. For clean-media lines DN50 and above, a reduced-port valve can save cost; if the media contains particles or requires pigging, a full-port valve must be used.

• Installation: Verify the flow direction (though bidirectionally sealing, we still recommend following the arrow). Tighten flange bolts diagonally and evenly to avoid body distortion.
• Torque: If manual operating torque suddenly increases to more than 1.5 times the factory value, do not force the valve. Common causes are media crystallization or seat wear – inject a specialized cleaning solvent, let it soak, then operate slowly.
• Maintenance: Inject lubricant through the grease fitting every 6 months. For valves that remain inactive for long periods, cycle them once per quarter. We provide a detailed maintenance manual and spare repair kits (seats, gaskets, stem O-rings).

All our ball valves have top stems designed to ISO 5211 (F03/F05/F07/F10/F12/F14) standards, making them directly compatible with most mainstream actuator brands. If you already have actuators (e.g., Biffi, Rotork, or domestic models), simply provide the stem dimensions and bolt circle diameter of the mounting pad, and we can manufacture a custom adapter bracket and stem extension.

All our standard ball valves (especially carbon steel and stainless steel) come standard with an anti-static device (electrical continuity between stem and ball) and a fire-safe structure complying with API 607 or ISO 10497. Trunnion ball valves can also be supplied with API 6FA certification. We can provide fire test reports, anti-static test reports, as well as PED, ATEX, and ISO 9001 certificates with each shipment.

• PTFE / modified PTFE: Temperature range -29~+200°C, excellent corrosion resistance, suitable for clean media, with a standard service life of tens of thousands of cycles.
• PEEK: Maximum temperature +250°C, better wear and steam resistance, ideal for high-temperature, high-pressure, or frequent operation.
• Metal-seated (hard seal): Temperature range -29~+450°C, erosion resistant, suitable for granular, high-viscosity, or high-temperature steam media.
  We will recommend a specific shut-off class based on your actual temperature, media cleanliness, and switching frequency.

Key factors to consider during selection:

• Media compatibility (primary condition): It is essential to ensure that the material can resist chemical corrosion by the medium. You can refer to the
• material corrosion data handbook or request a material selection guide from the valve manufacturer.
• Temperature and pressure: The mechanical strength of the material (such as yield strength) will change with temperature. Ensure that the material can withstand the system pressure at the operating temperature.
• Balance the initial cost and service life.
• Internal component materials: The corrosion resistance of the valve body does not mean the overall safety of the valve. The moving parts that come into contact with the medium, such as balls, valve stems, and valve seats, the material selection is often more critical because the corrosion of these components will directly affect the sealing performance. For example, valve seats often use elastic materials like PTFE to ensure sealing.
• For critical or complex operating conditions, it is recommended to consult valve manufacturers or material engineers. They can provide final recommendations based on the specific combinations of medium concentration, temperature, and pressure.

We offer pressure ratings from Class 150 to Class 2500 (PN16 to PN420) and size ranges from 1/2″ to 48″ (DN15 to DN1200). Floating ball valves are available up to DN200, while trunnion-mounted ball valves are used for DN50 and above. Non-standard pressure ratings or special sizes can also be manufactured upon request.