3" x 3" Fig 1502 Gear Operated Plug Valve (M x F) | Sour Service (H2S) | 10,000 PSI Flow Control

The 3" x 3" Figure 1502 Gear Operated Plug Valve for Sour Service is a heavy-duty, high-capacity flow control component engineered for the safe, reliable management of maximum-volume fluids in hazardous, hydrogen sulfide (H2S) rich upstream environments. Featuring a massive full 3-inch internal bore, this valve is designed to handle immense pump rates while virtually eliminating flow turbulence and destructive pressure drops. To strictly comply with critical safety standards for volatile H2S environments, this Figure 1502 component is explicitly derated to a highly secure 10,000 PSI Cold Working Pressure (10M CWP), providing a fail-safe isolation barrier during toxic flowback, large-scale well testing, and sour stimulation operations.

What strictly defines this large-bore plug valve is its NACE MR0175 / ISO 15156 compliant metallurgy. The premium forged alloy steel undergoes a rigorously controlled heat treatment process to limit material hardness, completely neutralizing the threat of Sulfide Stress Cracking (SSC) and hydrogen embrittlement common in lethal sour gas applications. The internal sealing components are also heavily upgraded, utilizing specialized, H2S-resistant elastomeric compounds formulated to withstand aggressive chemical degradation.

The critical operational advantage of this large-bore valve is its integrated Gear Operator. At a 3-inch bore size, the internal surface area subjected to 10,000 PSI of differential pressure is massive, making standard manual wrench actuation extremely difficult and potentially dangerous. The heavy-duty, enclosed worm gear mechanism provides a significant mechanical advantage, allowing a single field operator to easily, smoothly, and safely open or close the line. This ensures controlled fluid throttling, eliminates the risk of dangerous pressure spikes (water hammer) from opening lines too quickly, and minimizes physical strain in hazardous environments.

Configured with industry-standard Figure 1502 Male (Wing Nut) x Female (Thread) hammer union ends, this gear-operated sour service valve integrates seamlessly into large H2S-rated frac spreads and choke manifolds, delivering massive fluid capacity combined with safe, effortless manual control.

Features & Benefits

• 10,000 PSI Sour Service Rating (10M): Specifically engineered and derated to safely manage extreme high-pressure H2S fluid systems with a 10,000 PSI Cold Working Pressure rating.

• NACE MR0175 Compliant: Manufactured with specially heat-treated, controlled-hardness alloy steel to prevent Sulfide Stress Cracking (SSC) in lethal sour gas environments.

• Integrated Gear Operator: Heavy-duty enclosed gearbox and handwheel provide massive mechanical advantage, ensuring effortless, safe, and precise manual operation under maximum differential pressure.

• Full 3-Inch Bore: Accommodates extreme flow rates and abrasive slurries while drastically minimizing flow turbulence and internal fluid erosion.

• H2S-Resistant Sealing: Utilizes precision-machined metal-to-metal seats combined with resilient lip-type seals formulated specifically for sour gas chemical compatibility.

• Male x Female Connections: Features standard Fig 1502 hammer union ends for fast, highly secure integration into existing sour service flowline networks.

Specifications & Technical Details

Applications

This full-bore, high-pressure sour service gear-operated valve is an absolutely critical safety asset for large-scale operations where hydrogen sulfide (H2S) is present. It is ideally utilized as a primary master or wing valve on sour fracturing manifolds, a precise control and isolation barrier on severe-service H2S flowback spreads, an active control valve within large sour well-testing layouts, and any hazardous application requiring maximum 3-inch fluid flow combined with safe, gear-assisted manual operation.

Quality Assurance

Each gear-operated sour service plug valve undergoes the most rigorous quality control protocols in the industry. This includes severe hydrostatic pressure testing of the body and seat under full load, operational testing of the gear mechanism, magnetic particle inspection (MPI), and strictly documented Hardness Testing to verify NACE MR0175 compliance. Full material traceability (MTRs) is provided to guarantee fail-safe structural integrity.

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