AXIAL FLOW VALVES (AFV)
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” ~ 72” (DN25 ~ DN1800)
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
The Control Seal Axial Flow Valve has the following characteristics:
SMALL, compact design
OPENING AND CLOSING at FULL DIFFERENTIAL PRESSURE
PRESSURE BALANCED PISTON requiring a SMALL ACTUATOR
BUBBLE TIGHT sealing both upstream or downstream of the valve.
The valve design is BI-DIRECTIONAL allowing flow in both directions.
The design is based on a valve cage with RADIAL HOLES or TANGENTIAL HOLES in combination with a movable piston
Full FLOW / PRESSURE CONTROL
LOWER NOISE levels than conventional valves
choke (Joule Thomson)
surge relief valve
on-off service (HIPPS)
oil and gas production
transmission grids, distribution and storage of fluids
Used for wide range of fluids:
crude oil to refined products
high GOR multiphase fluids
natural gas (with contaminants such as sand)
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).
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 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®