High Accuracy Control Valve OEM Masonielan 28000 Series Varipak Valve 28000 Series Microflow Control Valve for Petrochemical

The Masoneilan 28000 VariPak is the industry-standard micro-flow control valve specifically engineered for precise regulation of extremely low flows in laboratory, pilot plant, and research applications. With ten interchangeable plug-and-seat trim sets covering Cv from 0.001 to 4.0 and a field-adjustable 10:1 turndown, it offers unmatched flexibility without changing the valve body. The compact ¾" angle body with ANSI 900/1500# end connections and heavy-duty bellows or graphite packing ensures ANSI Class VI shutoff even at high pressures. Trusted for over 50 years in catalyst injection, dosing, and sampling systems worldwide.

• 10 Interchangeable Trim Sets: Cv 0.001 to 4.0 in one body
• Field-Adjustable Turndown: Up to 10:1 per trim set
• ANSI Class VI Shutoff: Soft-seat or metal-seat options
• Compact ¾" Angle Body: Minimal dead volume
• High Pressure Rating: ANSI 900/1500# standard
• Bellows Seal Option: Zero leakage to atmosphere
• Anti-Cavitation Trim: Multi-stage Lo-dB available
• Stellite or Alloy 6 Overlay: For erosive service

• Catalyst injection in pilot plants
• Laboratory analytical sampling
• High-pressure reactor dosing
• Fuel cell research loops
• Supercritical CO₂ test rigs

Yes — simply replace the plug and seat trim in minutes.

0.001 (1*10⁻³) — ideal for µl/min flows.

Yes with optional bellows seal bonnet.

Yes — multi-stage Lo-dB trim available.

For sizing, quotations, or technical support:

• Email: edwardzhao@gbsxj.com
• Phone: +8615000725058
• Website: https://www.shgongboshi.com/

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