Monoflanges Monoflanges are design for Shut-off and venting of pressure measuring instruments. Block & BleedDouble Block & BleedIsolationOS & Y Type (Double Block & Bleed) Block & BleedDouble Block & BleedIsolationOS & Y Type (Double Block & Bleed) Request a QuotePlease enable JavaScript in your browser to complete this form.Name *Business / Organization *LayoutEmail *PhoneRequest *Captcha * = Request Quote