Overview
The Flowserve Valdisk 3″ pneumatic butterfly valve is a double-offset control valve engineered for demanding industrial applications. This Valdisk model features a 50LBS pneumatic actuator optimized for quarter-turn operation and precise modulation. The double-offset disc design reduces wear while maintaining excellent shutoff integrity, making it a trusted choice for process control systems across oil, gas, chemical, and utility sectors.
Key Features
- Double-offset butterfly design minimizes seat and disc wear
- High-thrust pneumatic actuator with 50LBS torque rating for reliable actuation
- Eccentric-cammed disc provides unmatched throttling performance
- Bubble-tight shutoff for improved leakage resistance and compliance
- Single pivot-point splined shaft minimizes lost motion, ensuring greater accuracy
- Reduced maintenance costs through extended service life
- Complies with major industry standards including API 609, ASME B16.34, and ISO 15848-1
Technical Specifications
- Valve Size: 3 inch
- Valve Type: Double-Offset Butterfly Control Valve
- Actuator Type: Pneumatic Cylinder
- Actuator Torque: 50 LBS
- Design Standard: ASME B16.34, API 609, DIN, EN
- Material Options: Carbon Steel, Stainless Steel (CF8M), Monel, Hastelloy C available
- Seat Options: Soft PFA/Viton, Firesafe sealed, or TriFlex metal seats
- ANSI Class: 150 and 300 rated
- Certifications: API 598, API 607, API 609, ISO 5752, ISO 15848-1
Typical Applications
- Oil and gas flow control and isolation
- Chemical processing throttling and modulation
- Power generation feedwater and steam applications
- Water treatment and utility systems
- HVAC systems requiring tight shutoff and controlled flow
- Process loops requiring high cycle operation with minimal wear
Compatibility & Replacements
Compatible With
- Pneumatic control systems and PLC-based automation
- Digital positioners (Flowserve Logix series)
- Flanged piping systems ANSI 150/300 class
- Modulating and on-off control schemes
- Process control instrumentation and instrumented systems
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator or Flowserve technical support before ordering. The Valdisk 3″ series is available in multiple configurations (body material, seat type, actuator size); confirm that flange pattern, port size, and actuator connection match your legacy installation.
Works With
- Flowserve digital positioners and instrumentation
- Pneumatic supply systems (standard industrial air)
- Manual override and fail-safe actuator modules
- Auto Brakit mounting kits and SureGrip couplings
- Standard industrial process control networks
