China top entry ball valve manufacturers, top entry ball valve suppliers, top entry ball valve factory. Leakages are effectively prevented from the ZGV Top entry ball valves because of an uni-body structure, this type of ball valve can be maintained and repaired at site under service condition to ensure an easy routine maintance; It is easy to remove the ZGV's bonnet of these items to allow an easy access to the body cavity without dismantling the valve from the pipeline. Both ball and seat-rings can be taken out only by a set of special maintenance tools; this maintenance operation requires very small space around the valve, which make it as the perfect solution whereever space or on-line maintenance is a headache.
The ZGV top entry items are announced in both Forged & cast fabrications with one piece symmetic body, ZGV manufactured an advanced structure of top-entry ball valves in a broad line of diameters and pressure classes with below listed features:
Design Features
» Floating ball or Trunnion Mounted
» Resilient or metal seated design
» Full port or reduced bore
» Optional D.B.B & Dual Piston Effect
» Uni-body with Buttweld or Flanged Ends
» Seat Lubrication and emergency Sealing Device
» Fire Safe; Anti-static device; Blow-out proof stem
» Optional Top flange to ISO 5211
» Optional locking device
Standards Compliance
» Design API 6D, ISO 14313, ASME B16.34
» Face to Face to ASME B16.10
» End Type ASME B16.5 & B16.47 & ISO 7005
» WPS-PQR & WPQ certification complying to American Welding Standards
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