1500# Bellows-Sealed Design

The Hammel Dahl Nuclear Sampling Valve is primarily intended for PWR applications requiring a bellows seal design.  However, its compact/light weight design makes it an excellent choice for nuclear plant sampling valve applications wherever spatial constraints and/or weight limitations exist.

For a specification sheet, click here.

Primary features and benefits include:

  • Provided to ASME Section III, Class 1 requirements
  • Compact piston actuator and body design for installation in areas with tight spatial constraints.
  • Bellows-Sealed for PWR primary system applications.
  • Secondary graphite packing provides back-up sealing in unlikely event of a bellows leak.
  • Extremely short stroke to facilitate small sample requirements.
  • Extremely short stroke permits the use of compact limit switches, reducing envelope size and weight (limit switches available as an option)
  • Enhanced bellows design and material (Inconel 750) to provide extended service life without bellows failure.
  • High closing thrust to assure positive shut-off.
  • Hermetically-sealed body to bonnet joint to eliminate any external leakage that is characteristic of bolted-bonnet designs.
  • Hardfaced seat and plug seating surfaces, precluding need for frequent servicing of valve to replace or renew seating surfaces.
  • One-Piece Plug and Stem, simplifying design.
  • Rugged construction designed to satisfy typical nuclear plant seismic requirements.
  • Radiation-resistant piston seal materials
  • Refined design based on decades of operating experience.