Ball Valve

2 Piece Floating Ball Valve

2 Piece Floating Ball Valve is a valve with its ball floating (not fixed by a trunnion) inside the valve body, it drifts toward to the downstream side and tightly pushes against the seat under the medium pressure to ensure sealing reliability. The floating ball valve has simple structure, good sealing performance but the seat material is required to withstand the workload since the sealing pressure is bared by the seat ring. Due to unavailability of high performance seat material, floating ball valve is mainly used in middle or low pressure application. TANA floating ball valve series featuring 2PC split body side entry or uni body, a very popular design in floating ball valve.

2 Piece Floating Ball Valve


A216 WCB Ball Valve Manufacturer ASTM A216 WCB Ball Valve, 6 Inch, CL150, ASTM A105+ENP Ball & Stem, RPTFE Seat, Flanged End.

  1. Bow-out proof stem

For the purpose of preventing the stem from flying off resulting in abnormal rising of the inner pressure of valve,shoulder is fixed at the lower part of the stem.In addition,in order to prevent leakage resulting from burnout of packing set of the stem in a fire,thrust bearing is set at the contact position of the shoulder at lower part of the stem and ball valve body.Thus an inverse seal seat is formed which will prevent leakage and avoid accident.

  1. Key lock

Locks can be used to lock the manual valve when it is fully open or closed so as to prevent non-working personnel from pulling the handle which may result in misoperation of valve.It can also avoid opening or closing of valve resulting from the shock from pipelines or unpredictable factors that may cause an accident.For working pipelines such as combustible and explosive oil,gas and chemical medium,or for field piping site,the locking mechanism is especially useful.

  1. Anti-fire safe design

When the floating ball valve be used normally,its sealed by seat and ball surface,seat retainer sealed by O-ring and body,this is soft sealed and reliable sealing.When the seat and O-ring are burnt,the seat retainer and body will be sealed by expanded graphite.Thus act anti-fire safe purpose.

  1. Anti-static device

In order to prevent friction among ball,stem and PTFE that generates static electricity which may light the combustibles and explosives that cause an accident,in this ball valve,static-conduction spring is set between the stem and the ball,the stem and the body.Thus static electricity is conducted to ground and system safety is secured.

  1. Low torque in operation

The self-lubricated bearings are installed at the friction of stem,resulting in wear resistance,fiexibility of operation and low torque.

  1. Automatic body cavity relief

When the valve body pressure going up un-normally as the unstable factor,the trunnion ball valve downstream seat will be pushed by un-normally pressure,and the release the un-normally pressure automatically,it doesn't damage to the sealing of upstream seat.The unnormal pressure which in the floating ball valve body will release the pressure into the upstream pipe directly,it doesn't damage to the sealing of the downstream seat.

  1. Various driving types

The top pad of ball valve designed according to ISO 5211,which is convenient for connection and exchange of various drivers.The common driving types are manual,electrical,pneumatic and pneumatic/hydraulic.


Design &Manufacture:API 608/BS5351/API6D

Face to Face:ASME B16.10 JIS B2002

Flange End:ASME B16.5 JIS B2212,B2214

Shell Wall Thickness:BS 5351

Valve Test:API 598 JIS B2003

Pressure-Temperature Rating:JIS B20271,B2081

ANSI Flanged floating ball valve Material list

2 Piece Floating Ball Valve 1 Body ASTM A216 Gr.WCB
2 Seat seal PTFE
3 Ball SS 304
4 Stem ASTM A182 F6a
5 Gasket PTFE
6 Spring SS 304
7 Steel ball SS 304
8 Packing PTFE
9 Packing Bushing ASTM A276 410
10 Nut ASTM A193 Gr.WCB
11 Retaining Ring SS 304
12 Lever ASTM A216 Gr.WCB
13 Gauge Block AISI 1010Zink-coated
14 Packing Gland ASTM A216 Gr.WCB
15 Body Gasket PTFE
16 Bonnet ASTM A216 Gr.WCB
17 Stud ASTM A193 Gr.B7
18 Nut ASTM A194 Gr.2H

ANSI flange floating ball valve dimenison and weight(150~300lb)

2 Piece Floating Ball Valve2 Piece Floating Ball Valve

For more details, please download catalogue for reference or contact with us.

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