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DESIGN FEATURES
- Off-center split-body design allows the use of advanced spiral-wound gaskets.
- Maximum temperature for CF8M 1,000°F (538°C), forWCB800°F(426°C).
- Full port ensures large capacity and reduces the risk of clogging when handling solids or slurries.
- Wall thickness complies with ASME B16.34 and BS 5351 for 2-12" ASME 150 and 300 full port only.
- Stem bearing reduces side thrust effect on packing and prevents stem wobbling.
- Integral seat locking option does not require additional parts or special tools.
- Scraper seats standard.
- Ball and seats lapped for optimum performance and tight shutoff.
- Low emission stem seal.
- Blowout-proof stem.
- Two-piece flanged gland. Live-loaded as standard.
- All valves with graphite packing and backup seal are inherently fire safe.
- Can be used for manual throttling applications. (For automation contact Velan Engineering.)
- Manual operation with handle for 2-4" (50-100 mm) FP and 3-6" (80-150 mm) RP. 6" (150 mm) FP, 8" (200 mm) RP and larger require gear or actuator. Gear or pneumatic actuator available.
- Tightness rates: Allowable leakage rate at full Delta P: ASME/FCI 70-2 Class V. Tighter shutoff available upon request.
- Oversized ball to stem connection provides:
- No deformation of the stem slot in the ball.
- Better throttling control performance.
- Less motion loss and wear in automatic on-off applications. -
DESIGN FEATURES:
- Exclusive Memoryseal™ seats compensate automatically for wear and fluctuations of pressure and temperature.
- Unique 4-Way and 3-Way packing arrangements for superior stem sealing (refer to page 7 for details).
- TA-Luft certified.
- Multiple solid cup and cone type PTFE stem seal and graphite packing.
- Stem guides prevent side thrust.
- Long cycle life
- Low, uniform torques.
- Blowout-proof stem.
- Fully enclosed PTFE body seal.
- Metal-to-metal contact between insert and body act as secondary seal and prevents overcompression of the seats.
- Pipe flange gasket acts as third precautionary seal as threads from the insert are within the raised face flange.
- Meets worldwide specifications. Design ASME B16.34, BS 5351, API 608(2), fire tested to API 607 Rev. 4, BS 6755 and API 6FA. ISO/CAPI for all parameters of standardized valve automation.
- Locking device standard for valves with lever handle.
- Highest standards of quality.
Over its 50 years of production activities Velan has earned a worldwide reputation for quality in design, manufacturing and valve performance.
The valves can handle a vast variety of fluids, slurries, semi-solids and almost any corrosive service in chemical, petrochemical, oil, gas, pulp and paper, processing and other industries. -
DESIGN FEATURES:
- Permits in-line access for seat replacement.
- Can be welded into line without disassembly. Consult IOM manual for details.
- Full port reduces risk of clogging in slurries and solids applications.
- Body-cover joint not affected by pipe stresses.
- High sealing integrity of body-cover joint due to fully-enclosed spiral-wound stainless steel graphite gasket design.
- Solid Stellite 6 seats with large seating faces.
- Backup seal: Graphite to 1,000°F (538°C).
- Operation automatically wipes ball clean.
- Wall thickness complies with ASME B16.34.
- Stainless steel ball, hard chrome plated.
- Stainless steel blowout-proof stem.
- Low emission stem seal.
- Live-loaded two-piece flanged gland.
- Fully-guided stem reduces side thrust effect - no wobbling.
- Heavy stainless handle for manual operation. Up to 2" (50 mm) for regular port.
- Oval handles and extension handles available.
- Tightness rates: Allowable leakage rate at full AP: ASME/FCI 70-2 Class V. Tighter shutoff available upon request
