Instrument MonoFlanges

Block and bleed MonoFlanges are a primary isolation valve to provide a compact instrument block and bleed valve. These are used when primary isolation valves when an OS & Y bolted bonnet are not required. The needle valves of the flanges are provided with a screwed bonnet. The standard pressure instrument connection is 1/2 NPT female, the standard process connections are provided by flange connections acc. to ASME B 16.5. Providing axial, radial or dual outlet types for either horizontal or vertical flange mounting.

The MonoFlanges are available as Block, Block & Bleed or Double Block & Bleed designs.


  • Construction: Stainless steel
  • Pressure Rating: up to 690 bar (subject to model)
  • Suitable for pneumatic and hydraulic applications
  • Standard medium temperature: 220°C


  • Oxygen clean service
  • Low/High temperature
  • Material certification
  • Vent plugs
  • Wetted parts

Calibration Notes

Not applicable on this product.

If you have any questions, please contact us on +44 (0) 117 965 4615 or visit our enquiry page and submit the form.

We can also customise our products to your specific needs.

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