Line blind valve QLB

ONIS QUICK ACTION LINE BLIND is a mechanical piping equipment that can guarantee absolute tightness between upstream and downstream pipes whoever is operating it while reducing risks and costs.

Simple and quick to use, this mechanized positive isolation system brings reliability to any positive isolation operation. For all ONIS Quick-Action Line Blinds, the two forged half-bodies / seats spreading operation is performed by a lever or a hand-wheel connected to a gearbox. This flange spreading movement, generated by efficient and reliable synchronized eccentric shafts, allows the displacement of a slide gate designed with a full-bore and a blind position.

Seats clamping movement is as simple as spreading operation. Just oppositely operate the lever or handwheel. This quick-action clamping mechanism is self-locking and resistant to overpressure and vibration.

4 gaskets are only on slide gate 2 per position of use, accessible for inspection or replacement without disassembly.

Body: Stainless steel or Carbon steel
Temperature range: -196°C to 650°C
Pressure range: 0 to 420 bars
Diameter: From 0.5 inch to 52 inches (larger on request)
Options: PTFE or PFA linen, Firesafe with graphite gaskets, interlocking system
This positive isolation equipment is set and tested in the factory and requires no adjustment on-site after installation or operation. It enables a pipe isolation with a perfect tightness whoever is going to operate it.

All Quick Action Line Blind are designed following these specifications:

Forged bodies up to 42”.
Spreading design with no internal mechanism and no internal gasket.