axial on-off valve

product summary

Main product features

Axial flow
Streamlined flow path through the full-port expanded body avoids turbulence and prevents erosion and vibration. TProcess downtime and maintenance costs are reduced.

Low pressure drop
The capacity of the axial on-off valve is extremely high, as a result o which the pressure drop is negligible. Operating costs of pumps and compressors are reduced.

Pressure balanced
Operating forces are independent of pressure. Valve can be opened against full differential pressure without damage to sealing. Equalisation with a bypass valve is not required.

Easy actuation
Actuation force is low and constant because of pressure-balanced trim. Small, spring-opposed actuators can be selected and gearboxes are not required.

Excellent sealing
TIn the open position the main seal is protected against erosive flow. The self-energising sealing system offers reliable bi-directional and bubble-tight shut-off.

Compact
The one-piece valve body provides 15-60% weight reduction compared with ball or gate valves. This benefit is even more attractive combined with spring-opposed actuators.

Fire-safe
The seals that prevent internal and external leakage are secured inside the valve body and therefore less susceptible to external heat sources. All axial on-off valves are certified fire-safe.

Special features

• Custom-designed
• Safety: secured process isolation by means of reliable on-off technology (HIPPS)
• Very fast stroke times : 20” Class 1500 in less than 2 seconds.
• Suitable for infrequent use: operating forces do not increase over time. No-sticking.
• Full range of matching Mokveld pneumatic and hydraulic actuators with tailored control arrangements is available. Actuation with other types of actuators is possible.

The axial on-off valve is selected in preference to the following:

• Ball valve
• Plug valve
• Gate valve.

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