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Damper Butterfly Valves

DMR series


CVB Dumper Butterfly Valves DMR series have excellent performance, high reliability, easy maintenance to allow accurate directional flow control in any gas circulation system.

Core Features

  • Monobloc or fabricated body
  • Low pressure drop
  • Additional thrust bearing
  • Wide range of materials

Benefits of DMR Series


  • Available for wafer or flanged style
  • Ensuring maximum performance and reliability
  • Guaranteeing lightness
  • Available with extended neck to enable piping insulation


  • Design to minimize pressure drop
  • Light design to easy controllability
  • Light construction with reinforcing ribs to ensure low operating torque


  • Double shaft or (upon request) single shaft design to guarantee higher torsional resistance
  • Extended shaft to allocate additional bearing to reduce friction and avoid bending


  • Top flange allows easy coupling to manual, pneumatic and electric actuators
  • ISO 5211 standard

Product Specifications

Production Range

Nominal diameter
3” – 120” (80 - 3000 mm)
larger size upon request

Pressure Limit

From vacuum up to +6 bar (88 psi)
Please refer to relevant technical brochure related to tightness class

Applicable Standards

Design: ANSI B16.34/ ASME VIII/ API 609
Face to face: API 609 A / ISO 5211 / DIN 3337
Flange: B16.5 / B16.47 / ASME VIII / DIN / ISO/ UNI
Testing: API 598
Fugitive emission: ISO 150484-1

Temperature Limits

From -20°C (-4°F) up to +818°C (+1600°F)
Please refer to relevant technical brochure related to seat material

Body Style

Double Flanged
For FtF dimensions, please refer to relevant technical brochure


Carbon Steel
Stainless Steel
Other materials available upon request


NP 2,5 - 6
Higher pressure upon request