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China Vihung Valve Co., Ltd.
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  5. Vihung - Floating Ball Valve

Vihung - Floating Ball Valve

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Floating Ball Va(ves,The ball in a floating valve is not held in place by a trunnion and flows downstream slightly, allowing the seating mechanism. VIHUNG floating ball valves are suitable for a wide range of applications with sizes typically between W to 8E supporting low and medium pressures. VIHUNG production range includes special floating ball valves suitable for severe services with larger sizes and higher pressures, single seated design eccentric ball types.

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There are two main body constructions: side entry and top entry. The main difference is based on how the pieces of the valve are manufactured and assembled, from the side or from the top, and operation is the same in each case: operating positions for 2-way valves can be either closed (no flow goes through) or open (fully or
partially;.

The Valves suitable for Oil & Gas production, processing, transportation, distribution, chemical and petrochemical refining.

GENERAL CONSTRUCTION:
Floating ball valves have the obturator free from axial constraints and it is supported between two soft seat inserts; under pressure the ball compresses the downstream soft insert to obtain the sealing; these valves are generally recommended for use in clean service with limited sizes and ratings. VIHUNG production range offers a wide selection of models and construction suitable for critical services also.

ANTI-STATIC:
Because the ball and stem in a ball valve are suspended on non-metallic parts, i.e. the seat seal and stem seal, there is a possibility a static charge may build up on the stem-ball, a mechanical (antistatic metal spring and ball) is introduced in the design to maintain the metal-to-metal contact between the rotating ball/stem and the valve body which will ground any charges to the valve body

BLOWOUT PROOF STEM:
The valve stem is made with a shoulder at the bottom end. It`s securely retained by the stuffing box, to avoid that the stem, under certain operating conditions, accidentally blows out. Other designs are available on request.

FIRE SAFE DESIGN
During a fire, non-metallic soft material will be burnt, subsequently seat leakage or external leakage may occur and cause the fire spread or contaminate the environment. Our ball valves are fire tested in accordance with API 6FA or API 607, witnessed and certified by TUV SUD. If valve is not covered according to the standards, they are designed to be fire safe

MATERIALS OF CONSTRUCTION:

  • Low Temperature and Low Alloy Carbon Steel
  • Stainless steel, Duplex and Super Duplex
  • Nickel alloys
  • Titanium
  • Bronze
  • Body Material: A216 WCB/LCB/WC6/WC9/CF8/CF8M/CF3/CF3M/4A/SA/6A/A10S,A3S0 LF2,A182 F304/F316/F316L/F317/F321/F51/F51/F53/F55
  • Ball and Stem Material: ASTM A182 F6A/17-4PH/XM-19/A182 F51/A182 F53/A182 F55
  • Seat: RPTFE/DEVLQN/PEEKMrON/METALTO METAL