Top-entry ball valves

Overview

Category: Quarter-turn valves
Product line: Memoryseal ball valves


  • Size range(s)
    NPS 1/2 - 12
    (DN 15 - 300)
    Pressure rating
    ASME Classes 150 - 300
    Standard connections
    Threaded, Socket weld, Butt weld, Flanged

Features and benefits

● Exclusive Memoryseal™ seats compensate automatically for wear and fluctuations of pressure and temperature.
● Multiple solid cup and cone type PTFE stem sealor graphite packing.
● Two-piece self-aligning packing flange and gland.
● Stem guides in cover and gland bushing eliminate side thrust.
● Longer cycle life.
● Lower, uniform torque.
● Blowout-proof stem.
● Live-loaded thrust washer prevents galling and provides a secondary stem seal.
● Meets ASME B16.5, B16.10 and B16.34, API 608, API 598, API 607 Rev. 5/ISO 10497.
● Fully-enclosed spiral wound graphite filled stainless body gasket.
● Permits in-line access for seat replacement.
● ASME Section 8 cover/body flange connectionand bolting provide high sealing integrity of body gasket.
● Body-cover joint not affected by pipe stresses.
● Wall thickness complies with ASME B16.34.
● Can be welded into line without disassembly in accordance with Velan installation instructions.
● Stainless steel trim on all valves including handle.
● Oval handles with locking device, as well as extensions available.
● Ball-to-stem only (NPS 2/DN 50) full port and larger) and stem-to-body static grounding.
● Locking devices standard.
● Tapping for mounting actuators standard.
● AGA and CGA approved, regular port, threaded ends (optional) NPS 1/2–2 (DN 15–50).
● Valves can meet NACE specifications for sour gas service when required.
● Optional topworks: live-loaded single or double packing; TA-Luft certified when supplied with PTFE live-loading packing; and bellows seal design.
● Fire tested in accordance with API 607 Rev. 5/ISO 10497. 

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