The Masoneilan 28000 VariPak is the gold-standard micro-flow control valve for high-pressure additive and catalyst injection in refining and petrochemical processes. Rated to ANSI Class 1500 and equipped with field-replaceable trim sets (Cv 0.001–4.0), it delivers precise, repeatable injection even at extreme differential pressures. The rugged angle-body design with Stellite trim, optional multi-stage anti-cavitation cages, and bellows seal bonnet ensures long life and zero external leakage in the harshest FCCU, hydrocracker, and coker environments. Over 100,000 units installed worldwide in catalyst and chemical injection service.

• ANSI Class 1500 Rating: Handles up to 255 bar differential
• 10 Trim Sets in One Body: Cv 0.001 to 4.0 without body change
• Multi-Stage Lo-dB Trim: Eliminates cavitation and noise
• Bellows Seal Bonnet: Zero stem leakage in toxic service
• Stellite Hardfacing: For erosive catalyst slurries
• Class VI Shutoff: Bubble-tight isolation
• Heavy-Guide Design: Anti-vibration and high stability
• Quick-Change Trim: Maintenance in minutes

• FCCU catalyst & promoter injection
• Anti-foam & anti-foulant injection
• Hydrocracker amine injection
• Coker quench water control
• Ethylene furnace decoking air

Yes — Stellite or tungsten carbide trim proven for decades.

Recommended for toxic or high-pressure services.

Replace plug and seat — no body removal needed.

Multi-stage Lo-dB trim eliminates cavitation completely.

For refinery injection applications:

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

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