Axial valve

Features

• High Flow Performance: Optimized Cv value for maximum flow capacity and low resistance coefficient K, minimizing pressure losses.
• Noise and Cavitation Control: Multi-stage cage with balanced plug for effective noise and cavitation suppression, extending system life.
• Smooth and Precise Operation: Rotary-linear mechanism with torque multiplier and backlash-free design to eliminate internal play and ensure fast, stable response.
• Operational Efficiency: Requires minimal operating torque, allowing the use of more compact actuators and reducing energy consumption.
• Low Emissions: Rotary stem with hermetic sealing ensures near-zero emissions.
• Wide Turndown Range: High turndown ratio (50:1) and fast response to setpoint changes, ideal for dynamic processes.
• Actuation Versatility: Compatible with manual, pneumatic, electric, or electro-hydraulic actuators.
• Specialized Configurations: Available in extended configuration for cryogenic service, suitable for extreme temperatures.

Body Design

• Optimized annular flow area, turbulence-free.
• High Cv and low resistance coefficient K.
• Extended designs available for cryogenic service.
• Compliant with ISA 75.03 / API 6D / ISO 5211.
• Cast bodies: 4”–48” / Classes: 150#–2500#.
• Forged bodies for 4” and 2500#.

Construction Materials

• Body Materials: A216-WCB, A217-WC6/WC9/C12A, A351-CF8M/CF8C, Alloy 20, Duplex, Super Duplex, Hastelloy, Inconel, Monel, Titanium.
• Trim Materials (Internal): A276-410/420, A276-316, A182-F51/F55, nickel alloys, tungsten carbide.
• Hard Coatings: Stellite (HRC 45), Tungsten Carbide (HRC 74), Chrome Carbide (HRC 68), Inconel (HRC 23).
• Optional: Integral tungsten carbide trim for choke-type applications.

Trim Design

• Stem-guided plug, optional balanced.
• Multi-stage control with multiple cages for severe conditions.
• Pressure-balanced transmission chamber.
• Particle protection.

Actuation Mechanism

• Rotary-linear design with force multiplier.
• Backlash-free, low-friction movement.
• Maximum thrust during opening/closing.
• Compatible with standard actuators.
• Excellent performance with particle-laden fluids.

Body Types

• One-piece

Trim Types

• STD / LDB / DobDrill / DobCage

Cage Types

• STD (non-critical multi-orifice)
• LDB (Low dB – low noise)
• DobDrill (combined, high range)
• DobCage (multi-stage, maximum noise/cavitation suppression)

Applications

• Process Control: Critical in oil, natural gas, and petrochemical industries.
• Power Generation: Thermal, combined-cycle, and nuclear plants where precision is vital.
• Severe Services: Efficient handling of particle-laden fluids and high-erosion conditions.
• Injection Systems: For water, steam, and condensate, optimizing recovery and efficiency.
• Critical Industrial Services: Suitable for both on-off control and continuous modulation in high-demand processes.