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ABZ Valve 400 Series Double Offset High Performance Butterfly Valve
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ABZ Valve 400 Series Double Offset High Performance Butterfly Valve


The ABZ™ line of double offset butterfly valves feature the Elite 400 and ABZolute High Performance series valves, designed for superior performance, safety, and longevity. Twin offset stems significantly reduce seat wear by minimizing contact with valve discs, making the ABZ butterfly valve ideal for operations involving particulate fluids, high-pressure and high-temperature conditions.

ABZ ABZolute Series 400 high performance butterfly valves are available in Soft Seat, Fire Safe Seat, and Metal Seat designs to fit product and process parameters. These heavy-duty valves meet ANSI (American National Standards Institute) and API (American Petroleum Institute) standards and are engineered for maximum service life from 2”-24” sizes. The offset seat and disc configuration is proven to extend valve operation.  


  • Available in 2”-24” sizes.
  • Wafer, lug, double-flanged, and butt-welded body styles available.
  • Underneath drawn gland packing facilitates easy adjustment and direct actuation mounting. 
  • Blowout-proof stem retention above packing (per API 609).
  • 316 stainless steel bearings impregnated with graphite or reinforced PTFE for long service life.
  • Robust seat retainer plate and hardware provide seat support in bi-directional flow and double dead end service applications.
  • Leak-resistant seat retainer seal.
  • Offset taper pins offer a higher yield point than the stem.
  • Machined position stop optimizes disc location and maximizes seat and seal life.
  • Quick release 316 stainless disc reduces torque and seat wear (ABZolute series).
  • Maximum strength stem for high torque conditions.
  • Complies with API 598/607/609 and MSS-SP-68 standards.
  • Certification of compliance to API 641, ISO 15848-1 and -2 available.


  • Oil and gas pipelines.
  • Refining operations.
  • Chemical processing.  
  • Power plants.
  • Pulp and paper.
  • Construction.
  • Commercial and industrial applications.


  • ABZolute Double Offset High Performance Butterfly Valves

Soft Seat Design

Fire Safe Seat Design

Metal Seat Design

Solid Seat

Free-Floating Pressure-Assisted Seal




Additional Parts Required for Positive Seal?




Full ASME Pressure

Seat & Retainers Suitable for Bi-Directional and Double dead-end Service


API 607 Fire Safe Tested




Class VI Before Fire, Class V after fire

Class V Uni-Directional

Rated for Vacuum


Class 150 Pressure/Temperature Maximums

300 psi/500𝇇F

300 psi/500𝇇F

300 psi/550𝇇F

Class 300 Pressure/ Temperature Maximus

800𝇇F/500 psi

740𝇇F/550 psi

550𝇇F/550 psi

Class 600 Pressure/Temperature Maximums

500𝇇F/1440 psi

550𝇇F/1480 psi

550𝇇F/1480 psi



Forum’s comprehensive ABZ product line includes general purpose and specialty valves up to 72 inches. All of our resilient-seated valves feature tight-tolerance bodies, resilient seals, simplified field maintenance and durable impact/corrosion-resistant materials for maximum life.


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