TOP ENTRY BALL VALVE is mainly used in pipeline and industry system and it has a top entry and on line maintenance function.It has a lot of advantages,such as small fluid resistance,simple structure,small volume,light weight,reliable saaling,convenience for operation and maintenance,open and close quickly,as well as start and close flexibly.

One piece body

One piece body is used for the body to guarantee sufficient strength and rigidity under maximum rated operating pressure.The internal parts of valve are carefully designed and selected to ensure reliability under all kinds of operating condition.Enough margin wall thckness and adaptation of high strength connective bolts are convenient for valve maitenance and sufficiency to support the stress from piping.

Top entry

Its most difference from common ball valve is that its maintenance can be made on pipe line and without dismounting from the pipe line.The back space seat structure is adopted for the seat and the rear portion of seat retainer is oblique angle to prevent accumulation of impurity from affecting back space of seat.

Low operation torque

 WINDMILL top entry series ball valve has a trunnion mounted ball,whose surface is ground,polished and hard face treated.The ball and stem is integrated,sliding bearing is installed on the external bore so that the friction radius is small and operation torque is very low.

Emergency sealing

Compound injection holes are designed and compound injection valves are installed at locations of stem/cap and body support of side valve.When sealing of stem or seat is damaged to induce leakage,the compound can be used to do the second time sealing.A concealed check valve is installed in side of each compound injection valve to prevent compound from out flowing due to the action of transmitter substance.The top of the compound injection valve is the connector for fast connection with compound injection gun.

Reliable sealing

The seat sealing is formed by seat sealing and metal retainer component.The seat retainer floats axially and low pressure sealing of valve seat is reached by pre-pressure of spring.In addition,the piston effect of valve seat is designed reasonably,which realized high pressure sealing by the pressure of operating medium and realize the interception of retainer to form the sealing of the body.The expansion graphite ring is designed to realize sealing under fire condition.

Double block&bleed(DBB)

When ball is full open or close position,the transmitter substance in center cavity of body can be released by drainage and emptying devices.In addition,the over loaded pressure in the center cavity of valve can be  released to low pressure end by self relief seat.

Anti-static and fire safe design

The fire prevention design of valve meets the requirement in API6FA/API607 standard and the design of the anti-static conforms to regulations in API6D and BS5351.

Extension stem

For the underground installed valve,the stem can be lengthened and for the convenience of operation the corresponding compound injection nozzle and drainage valve can be extended to the top of valve.

Various driving types

The top pad of 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.

Applicable standards:

Design STD: API 6D,BS 5351,ASME/ANSI B16.34

Face To Face: ASME B16.10

Flange End Connection: ASME/ANSI B16.5

Welded End Connection: ASME/ANSI B16.25

Size: 1/2" to 32"

Pressure: 150LB to 2500LB

Fire Safe: API 607

Inspection And Test: API598、API6D

Design description:

Full Port Design and Reduce Port Design

Bolted Bonnet,One-Piece Body

Top Entry Pattern Type

Blow-Out Proof Stem

Fire-Safe Durable Construction

Anti-Static Device

ISO5211 Mounting Pad-Top Flange

Flanged or Butt Welding Ends

Materials of Top Entry Ball Valves

No.   Part Material

1       Body         A216-WCB  A352-LCB  A351-CF8, CF8M, CF3, CF3M  Duplex

2       Seat Spring       Inconel X-7505  S.S.304  S.S.316

3       Seat Ring ASTM A105+ENP  ASTM A182-F304, F316, F316L, F6, F51

4       Seat PTFE  RTPFE  PEEK  PPL

5       Ball  ASTM A105+ENP  ASTM A182-F304, F316, F316L, F6, F51

6       O-ring       NBR  Viton

7       Thrust Washer         PTFE

8       Gasket     PTFE  S.S.304+Graphite  S.S.316+Graphite

9       Sliding Bearing          Stainless Steel+PTFE  S.S.316+PTFE

10     Bonnet     A216-WCB  A352-LCB  A351-CF8, CF8M, CF3, CF3M  Duplex

11     Packing    PTFE  Graphite

12     Gland Flange    A216-WCB  A351-CF8

13     Key   1045  A182-F304, F316, F316L, F304L

14     Stem         ASTM A105+ENP  A182-F6, F304, F304L, F316, F316L,17-4PH, F51

15     Yoke A216-WCB

16     Nut  ASTM A194-2H, 2HM, 8, 8M

17     Stud ASTM A193-B7, B7M, B8, B8M

18     Vent Valve        1020+Zn  A182-F304, F316, F316L

19     Lifting Lug         1020

20     Seat Injection  1020+Zn  A182-F304, F316, F316L

21     Steel Ball Stainless Steel

22     Antistatic Spring      1045+N  A182-F304, F316, F316L

23     Seat Spring       1045+N  A182-F304, F316, F316L

24     Steel Gasket    1045+N  A182-F304, F316, F316L

25     Trunnion  ASTM A105+ENP  A182-F6, F304, F304L, F316, F316L,17-4PH, F51

26     Trunnion Gasket       PTFE  S.S.304+Garphite

27     Adjusting Nut  ASTM A194-2H, 8

28     Adjusting Stud A182-F6, F304

29     Drain Valve       1020+Zn  A182-F304, F316, F316L