Multi-stage pressure reduction cage control valve

Multi-stage pressure reduction cage control valve

The multi-stage pressure reduction control valve adopts a cage-guided structure and pressure-balanced plug. It is primarily used in service conditions with high differential pressure and applications that produce flash evaporation and cavitation. The valve features different pressure reduction cages that form a multi-stage pressure reduction trim designed to eliminate flash evaporation and cavitation. Throttling begins when the media contacts the first cage, gradually reducing the high inlet differential pressure through several stages. This ensures the pressure remains above saturated vapor pressure as media flows through the valve, prolonging its service life under severe conditions.

Key Features:

• Anti-Cavitation Design: Specifically engineered to eliminate flash evaporation and cavitation in high differential pressure applications.
• Multi-Stage Throttling: Gradually reduces high inlet pressure through multiple throttling stages formed by specialized cages.
• Pressure Balanced Plug: Incorporates a balanced plug structure within a cage-guided design for stable operation.
• Extended Service Life: Protects the valve components under severe service conditions by managing vapor pressure levels.
• Flexible Trim Options: Features trim components designed according to different technological parameters and service conditions.

Technical Specifications:

• Size: DN10-600 (3/8”-24”) or DN40-400 (1.5”-16”).
• Pressure Class: PN1.6, 4.0, 6.3Mpa (ANSI 150, 300, 600LB).
• Applicable Temperature Range: -30°C ~ 260°C (balanced seal ring structure) or -196°C ~ 550°C (metal seal ring structure).
• Body Type: Straight-through type / angle type.
• Bonnet Type: Standard, heat dissipation, cryogenic, or bellows type.
• Trim Features: Cage guided, balanced trim structure, balanced seal ring structure (normal temperature), or metal seal ring structure (high temperature).
• Flow Characteristics: Equal percentage, linear, or quick open.
• Leakage Class: ASME B16.104 V (standard type metal seat) or ASME B16.104 VI (shut-off soft seat).
• Pipe Connection: Flange type or butt welding type.
• Actuator Type: Pneumatic diaphragm actuator, pneumatic piston actuator, or electric actuator.

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