3-,5-,7-, and 9-Bolt (BW) Models

Line Spread Type, Plate or Body Packed

Dimensions

Bolt ModelHamer Bolt Model

Click for a larger picture. 

Most commonly used line blind valve.

  • Simple
  • Rugged
  • Practical
  • Long Service
  • Minimal Maintenance Requirements
  • Simple Operation:

Spread the line with operating bolts using only a bar or pipe. Rotate the spectacle plate and tighten again in seconds without special tools (See A).

  • Compact Design:

The unique bolt head design allows installation and operation in a limited space.

  • Positive Position Indication:

The visible portion of the spectacle plate clearly indicates if the valve is open or closed.

  • Packing Variation:

Wide range of packings are available to suit service requirements, including spiral-wound stainless steel for high temperatures. Body packing (See B) is standard but spectacle plate packing is optional.

  • Full Flow:

Minimal turbulence occurs through a full round port, and the pressure drop is negligible.

  • Minimal Maintenance:

High-quality alloy nuts and bolts have a thorough bolt-to-nut lubrication feature (See D). The spectacle plate is plated for corrosion resistance on carbon steel blinds.

  • End Connections:

Available with butt weld or flanged ends with optional B16.10 end-to-end dimensions.

  • Time Saving:

Operate only a few bolts instead of loosening and tightening 4 to 12 bolts on a standard flange. Reversing the plate usually takes less than a minute.

  • Safety:

Absolute assurance of no downstream leakage. Alignment-locking pin is standard.