AXIAL FLOW VALVES (AFV)
- ON / OFF Axial Flow Valve
- CONTROL Axial Flow Valve
- SURGE RELIEF Axial Flow Valve
- CHOKE Axial Flow Valve
Control Seal ON / OFF Axial Flow Valve series is designed for quick operation and tight shut off.
SIZE: 1” ~ 48” (DN25 ~ DN1200)
PRESSURE: 150# ~ 2500# (PN20 ~ PN420)
TEMPERATURE RANGE: -196°C ~ 250°C (538°C)
CONNECTIONS: Wide choice on request
MATERIALS: Wide choice on request
Control Seal CONTROL Axial Flow Valve series is designed for precise control with optional trims to meet client requirements.
SIZE: 1” ~ 48” (DN25 ~ DN1200)
PRESSURE: 150# ~ 2500# (PN20 ~ PN420)
TEMPERATURE RANGE: -196°C ~ 250°C (538°C)
CONNECTIONS: Wide choice on request
MATERIALS: Wide choice on request
Control Seal SURGE RELIEF Axial Flow Valve series introduces special trim and proven flow control technology combined with fast stroking actuator.
SIZE: 1” ~ 24” (DN25 ~ DN600)
PRESSURE: 150# ~ 2500# (PN20 ~ PN420)
TEMPERATURE RANGE: -196°C ~ 250°C (538°C)
CONNECTIONS: Wide choice on request
MATERIALS: Wide choice on request
Control Seal CHOKE Axial Flow Valve series introduces special trim with special materials for reliable operation under extreme choke conditions.
SIZE: 1” ~ 24” (DN25 ~ DN600)
PRESSURE: 150# ~ 2500# (PN20 ~ PN420)
TEMPERATURE RANGE: -196°C ~ 250°C (538°C)
CONNECTIONS: Wide choice on request
MATERIALS: Wide choice on request
The Control Seal Axial Flow Valve has the following characteristics:
HIGH CAPACITY compared to conventional control valve types
COMPACT and LOW WEIGHT design
STREAMLINED flow path egg shape BODY reducing pressure drop, less velocity and less turbulance, lower noise compared to conventional valves
OPENING AND CLOSING at FULL DIFFERENTIAL PRESSURE
FAST STROKE
PRESSURE BALANCED PISTON enabling fast stroking and low operating torque, leading to a SMALL ACTUATOR requirement
NON-SLAM operation
BI-DIRECTIONAL and BUBBLE TIGHT sealing both upstream or downstream of the valve
FRICTION FREE between sealing areas, no need of partial stroke testing
Full FLOW / PRESSURE / TEMPERATURE CONTROL
VERTICAL or HORIZONTAL orientation possible without modification
RELIABLE DESIGN (often used for HIPPS applications, as Pressure Safety valve or Emergency Shutdown valve)
APPLICATIONS
Oil and gas production
Process industries
Transmission, distribution and storage of fluids
Severe service compressor recycle solution
Used for wide range of fluids:
crude oil to refined products
water and seawater (water injection and deceleration)
natural gas (with contaminants such as sand)
Control Seal has a UNIQUE DESIGN OF ITS PRODUCTS, SHORT LEAD TIME, COMPETITIVE PRICING AND EXCELLENT AFTER-SALES SUPPORT.
The Control Seal Axial Flow Valve has the following distinguishing features:
QUARTER TURN STEM DESIGN
Eccentric disk connected to the rotating stem to move the piston rod practically frictionless, compared to a gear-rack which loses more than 50% of its thrust.
Compact actuator due to reduced friction of inside mechanism and balanced piston. Moreover the rotating actuator has a lower stem friction.
High-end stem packing design avoiding fugitive emissions along the stem.
Available in different trim characteristics - cage design (linear, equal percentage, modified stage).
ADVANCED SEALING MECHANISM
Bubble tight shut-off to ANSI class VI, independent of actuation method. Fire safe shut-off to ANSI class V.
Option for dual sealing consisting of two independent mechanisms: a metal-to-metal seal in combination with special design soft seal.
No erosion impact on the seals and noise reduction. Soft seals not in contact with high flow due to special design concentric cage.
FIRE SAFE
Fire safe according to API 6FA. Internal leakage is avoided by metal-to-metal seal, whereas external leakage is contained by the graphite containing stuffing box on the rotating stem.
SPLIT BODY DESIGN ALLOWING SHORT LEAD TIMES
Optional cladding
SPECIAL TRIM FOR ANTI-SURGE APPLICATIONS
Special design piston with no erosion during full throttling process fluid inside the sealing area
Reduced stroking time during overshoot set point input
SERIES
Control Seal ON / OFF Axial Flow Valve
Control Seal CONTROL Axial Flow Valve
Control Seal SURGE RELIEF Axial Flow Valve
Control Seal CHOKE Axial Flow Valve
(Control Seal HIPPS Axial Flow Valve currently under development)
TRIMS
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AXF-FS - Fast Shut-off concentric Trim
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AXF-CL - Single cage concentric linear Trim
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AXF-CEQ - Single cage concentric eq% Trim
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AXF-CCL-II - Double cage concentric linear Trim
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AXF-CCEQ-II - Double cage concentric eq% Trim
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AXF-CCW - Labyrinth cage concentric whisper Trim
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Design |
API 6D, ASME B16.34 |
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Face to Face dimensions |
API 6D, ASME B16.10, B16.47 |
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Flanges |
ASME B16.5, B16.25, BW, Grayloc hubs, API605 (B16.47) |
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Fire Safe |
ISO 10497, API 6FA, BS 6755 |
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Fugitive Emission |
ISO 15848, TÜV, Shell MESC SPE 77-312 |
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Testing |
ANSI/FCI 70.2, API598 |
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Marking |
CE, MSS-SP-25 |
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Topworks |
ISO 5211 |
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Size selection |
ANSI/ISA S75.01-2007 & IEC 60534-8-3:2010 |
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1. Fully Open position Axial Flow Valve is fully open, allowing full flow through the streamlined flow path egg shape body. |
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2. Controlling the flow Rotational movement of the vertical stem (dark yellow circle) is transfered to the horizontal movement of the stem and piston (yellow) by patented mechanism. The piston travels through the cage (red) and closes the holes in the cage based on its position. Holes are distributed in the cage based on desired control characteristics. |
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3. Fully Closed position On 90 degrees turn of the vertical stem, the valve reaches its fully closed position. |
