<h2>Overview</h2>
<p>The <strong>Norriseal M3011-222B-U</strong> is a 2-inch wafer-style butterfly valve from the Series 200 line, rated to 200 psig working pressure with Viton O-ring seating. This resilient-seated valve delivers bi-directional, positive shutoff with low operating torque, making it ideal for demanding industrial applications in oil and gas, marine, petrochemical, and food processing environments. The valve features Norriseal’s proven angle-disc design that minimizes seat compression and ensures smooth, reliable flow control.</p>
<h2>Key Features</h2>
<ul>
<li>2-inch wafer-style body for compact flange-mounted installation</li>
<li>200 psig (Series 200) bi-directional shutoff with positive sealing</li>
<li>Viton O-ring resilient seat—field-proven longer seat life vs. competitor designs</li>
<li>Angle-disc design with 360° differential sealing surface</li>
<li>Double-shaft seals and body bushings for low-torque quarter-turn operation</li>
<li>Manual lever actuation; compatible with pneumatic/electric actuators</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Valve Size:</strong> 2 inches</li>
<li><strong>Part Number:</strong> M3011-222B-U (Wellmark 1131532)</li>
<li><strong>Pressure Rating:</strong> 200 WP (Working Pressure) psig</li>
<li><strong>Style:</strong> Wafer, 2-lug bolt pattern</li>
<li><strong>Seat Material:</strong> Viton O-ring (resilient)</li>
<li><strong>Body Material:</strong> Ductile iron or steel alloy</li>
<li><strong>Disc/Stem:</strong> Stainless steel or alloy (standard configurations)</li>
<li><strong>Operation:</strong> Manual lever (90-degree quarter-turn)</li>
<li><strong>Flow Direction:</strong> Bi-directional</li>
<li><strong>Manufacturer:</strong> Norriseal-Wellmark (ChampionX)</li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li>Oil and gas production, transmission, and refineries</li>
<li>Petrochemical and chemical processing plants</li>
<li>Marine and offshore systems</li>
<li>Power generation and HVAC systems</li>
<li>Pulp, paper, food and beverage processing</li>
<li>General industrial process water and steam lines (check media compatibility)</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>2-inch flange pairs (ANSI B16.5 or API 6A standards, subject to system pressure class)</li>
<li>Pneumatic and electric actuators (check torque ratings with valve manufacturer)</li>
<li>Gear operators and limit switches for automated control</li>
<li>Industrial piping systems rated 200 psig and below</li>
<li>Standard wafer-body mounting between flanges without additional gaskets</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>Earlier Wellmark 2″ Series 200 resilient-seated butterfly valves</li>
<li>Verify exact interchangeability with your system integrator or Norriseal technical support, as body flange class and actuator interface details may differ.</li>
</ul>
<h3>Works With</h3>
<ul>
<li>ANSI/ASME standards for wafer butterfly valve mounting</li>
<li>ISO 5752 and equivalent industrial butterfly valve specifications</li>
<li>Actuator control systems (pneumatic, electric, manual lever)</li>
<li>SCADA, DCS, and PLC systems (when paired with actuators featuring integrated feedback)</li>
</ul>
