AVT Composite Ball Valves
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Operator Design
Corrosion resistant, lightweight, lockable levers are offered for all Ball Valves up to 150mm (6 inch). Standard gearboxes can be fitted onto the valve.
Actuation
Any standard actuator can be fitted including ancillary equipment such as switch boxes, solenoids, beacon indicators, etc.
Standard Mounting Pad
ISO mounting for actuation.
Gland Packing
Energised chevron. ‘O’ ring seal.
Stem
Blow-out proof design, non wetted composite shaft with Hastelloy C-276 core as standard. Titanium and 316 stainless steel materials are optional - either encapsulated or bare metal.
Seating System
Bubble tight sealing. Available in Super PTFE TFM or Virgin PTFE seats. Options include glass filled PTFE, carbonfilled PTFE or PEEK.
Full Port
For maximum flow rate.
Design Features
AVT offer two gland packing options
“O” ring system Chevron Stuffing Box System
"O" ring system - Multi Viton "O" ring shaft seals for multi-cycle maintenance free use and low operating torque.
Chevron Stuffing Box System - PTFE chevron packing combination stem sealing system with energiser. A parallel “O” ring backup. A parallel motion adjuster applies even pressure on the chevron pack for simpler and quicker adjustment.
Dimensions for ANSI 150 Valves
Refer to individual specification sheets for ANSI 300, DIN, ISO and PN standards that are available.
Break Torque Ratings
To allow for variations in break torque due to pressure and viscosity variations, it is recommended that actuators capable of developing forces a minimum of 30% greater than the above are used. Higher safety factors may be required in some applications e.g. when operations are infrequent.
Options
Note: Specifications are subject to alteration.
