3/4″ Metering Ball Valve for Precision Flow Regulation | Full Port, Bi-Directional
Precision 3/4″ metering ball valve for accurate flow control. Full port, bi-directional sealing, corrosion-resistant. Ideal for chemical dosing and industrial applications. Reliable and durable.
Description
1. Product Overview
The 3/4″ metering ball valve is an industrial valve specifically engineered for precise flow regulation. Unlike standard on/off ball valves, this type incorporates a specially profiled ball—such as a V-port or characterized contour—to deliver an approximately equal‑percentage or linear relationship between valve opening and flow rate. This design provides superior control performance in applications requiring fine‑tuned fluid adjustment. It is widely deployed across chemical processing, pharmaceuticals, water treatment, and hazardous chemical transfer systems.
2. Key Features
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Full‑Port Design – When fully open, the ball bore matches the pipe’s internal diameter, eliminating additional flow resistance and minimizing pressure drop. This makes it particularly suitable for high‑viscosity fluids or those containing suspended solids.
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Bi‑Directional Shut‑off – Tight sealing is achieved on both sides, preventing reverse flow and ensuring safety during maintenance or emergency shutdowns.
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Outstanding Corrosion Resistance – The body is constructed from A351 CF8M (316 stainless steel), with the ball and stem also in 316 SS. Seals are made of reinforced PTFE, offering robust resistance to a wide range of strong acids, alkalis, and organic solvents.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Nominal size | 3/4″ (DN20) |
| Connection type | NPT female / BSP female (optional) |
| Body material | A351 CF8M (316 SS) |
| Ball / stem material | 316 stainless steel |
| Seat / seal material | Reinforced PTFE / RTFE |
| Pressure rating | 1000 PSI (PN63) |
| Temperature range | –20°C ~ 220°C |
| Flow characteristic | Equal‑percentage / Linear (optional) |
| End connection standard | ASME B1.20.1 / ISO 7‑1 |
4. Application Scenarios
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Precise dosing of hazardous chemicals – In fine chemical and pharmaceutical processes where corrosive reagents must be metered accurately, this valve can be paired with electric or pneumatic actuators for automated modulation.
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Water treatment and environmental protection – Used in pH neutralization, flocculant addition, and similar stages requiring stable and reliable flow regulation.
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Oil, gas, and energy – Suitable for applications like natural gas dehydration and amine solution circulation, where tight flow control is essential.
Application Case – STOCKMEIER France
At STOCKMEIER France, a leading European distributor of hazardous chemicals, the 3/4″ metering ball valve has been adopted at their Lyon blending centre for precise dosing of hydrochloric acid and caustic soda solutions. Thanks to its full‑bore construction and corrosion‑resistant materials, this valve effectively reduces pressure loss and leakage risks. The bi‑directional shut‑off feature adds an extra layer of operator safety, while significantly improving batching accuracy and overall system reliability.