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AXIAL FLOW VALVES (AFV)

AFV - Axial Flow Valves

Control Seal developed the Axial Flow Valve (in short AFV) due to market demand for a compact Control Valve that can open and close at full differential pressure. 

Size: 1” ~ 24” (DN25 ~ DN1800) (~ 72” on request)

Bore: Reduced or Full (Full is not piggable)

Pressure: 150# ~ 2500# (PN20 ~ PN420)

Temperature range: -196°C ~ 538°C

Connections: Wide choice on request

Materials: Wide choice on request

Axial flow valve

 

The Control Seal Axial Flow Valve has the following characteristics:

SMALL, compact design

STREAMLINED flow path 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 requiring a SMALL ACTUATOR

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

RELIABLE DESIGN (often used for HIPPS applications)

 

APPLICATIONS

Used as:

  • on / off

  • control valve
  • choke (Joule Thomson)

    (surge relief valve, HIPPS)

Applied in:

  • oil and gas production

  • process industries

  • transmission grids, distribution and storage of fluids

Used for wide range of fluids:

  • crude oil to refined products

  • water

  • natural gas (with contaminants such as sand)

Control Seal design

 

Control Seal has a unique design of its products, short lead time, competetive pricing and excellent after-sales support.

 

The Control Seal Axial Flow Valve has the following distinguishing features:

Rotating Stem Design

  • Eccentric disk (camshaft) 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.

  • Small actuator. Moreover the rotating actuator has a lower stem friction.

  • The rotating stem stuffing box avoids fugitive emissions along the stem.

  • Free choice of valve characteristics (linear, fast closing etc).

Sealing mechanism

  • Bubble tight shut-off to ANSI class VI, independent of actuation method.

  • The sealing consists of two independent mechanisms: a metal-to-metal seal in combination with conventional high pressure O-rings.

  • No erosion impact on the seals. Soft seals not in contact with high flow.

Fire Safe

  • Fire safe according to API 6FA. Internal leakage is avoided by the metal-to-metal seal, whereas external leakage is contained by the graphite containing stuffing box on the rotating stem.

Body design with bonnet allowing faster fabrication and shorter delivery times.

At request Control Seal can also produce Twister SwirlValves®

 

Design

API 6D, ASME B16.34

Face to Face dimensions

API 6D, ASME B16.10, B16.47

Flanges

ASME B16.5, B16.25

Fire Safe

ISO 10497, API 6FA, BS 6755

Fugitive Emission

ISO 15848, TÜV, Shell MESC SPE 77-312

Testing

API 598

Marking

CE, MSS-SP-25

Topworks

ISO 5210

 

 

 

AFV operation