VIAR LOCK is a type of connection composed by two hubs, a seal ring and two clamps tightened by bolts and nuts.VIAR LOCK can be used in most of application of welding neck, with the following advantages:
Lower installation cost in 600 class and higher services
Reduced cost during performance
High joint performance under the effect of external forces
High joint performance under the effect of thermal loads: the bolts are not directly involved by the process fluid and this minimizes the “bolt relaxation effect”
Lower torque requirements with no necessity of special tensioning tools
Self-energized and pressure energized seal ring
Reusable seal ring
Quick assembly: 4 bolts on the clamp
No overstress of the connector during over-tightening of the bolt
No bolt holes to align
The VIAR-LOCK® is basically designed to offer the greatest reliability in the performance of the joint under the most severe and critical operating conditions. VIAR LOCK is design is in accordance with ASME VIII Div.1.
Due to the implicit flexibility of the seal ring that allows to store elastic energy in the lip seals during the make-up of the assembly allows the joint to be adopted in piping systems which require high integrity of the seals, in corrosive or erosive as well as the most severe pressure/temperature cyclic conditions.
QUICK VIAR LOCK is a type of connection composed by two hubs, a seal ring and a quick opening clamp system tightened by bolts and nuts. The difference with VIAR LOCK is that QUICK VIAR LOCK is composed by only one bolts and it is quickest and easier to assembly than VIAR LOCK. VIAR LOCKs design is in accordance with ASME VIII Div.2.