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Forged Steel Cast Steel Ball Valve , Trunnion Mounted Ball Valve

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Forged Steel Cast Steel Ball Valve , Trunnion Mounted Ball Valve

Country/Region china
City & Province henan
Categories Shafts

Product Details

DN500 API Forged Steel Trunnion Mounted Ball Valve Float High Pressure

 

Brief introduction:

Trunnion Mounted ball valves mainly used in the industries of natural gas, oil products, chemicals,

metallurgy, urban construction, environmental protection, pharmaceuticals, foodstuff and etc.

 

Among them, the sulfurresisting series products are applicable for seriously corrosive natural gas

pipeline containing hydrogen sulphide mediums and impurities.

 

Structural features:

1. Distinctive seating structure

according to the extent of pressure, medium properties and sealing requirements, fixed ball valve

may be made to front seal structure, back structure, or front-back dual seal structure.

 

2. Self-relieving structure

In case of abnormal rise of pressure at middle cavity, ball valve of single seal structure is provided

with selfrelieving function, while ball valve of dual seal structure uses the auxiliary pressure relief

device on valve body to carry out pressure relief.

 

3. First aid of seal

the valve designed with an auxiliary Seating emergency seal system, as shown in the figure. In case

of soft seal damaged, or failure of seal in an emergency circumstance, emergency seal may be

effected by injecting in sealant through auxiliary sealing system. If needed, emergency seal assembly

can be used to rinse and lubricate the seating area. Plus, valve system can also be designed with an

auxiliary emergency sealing system.

 

 

4. Fire protection structure

If requested by working conditions and users, ball valve may be designed to fireproof. The fireproofing

design of ball valve is to the standards of API 607 and JB/T6899. In case of soft seal ring burnt in fire,

the fire protection structure of ball valve functions to prevent mediums from mass leakage, thus to avoid

fire spreading.

 

5. Antistatic structure

when operating the valve, the friction between the ball and seat will produce electrostatic charge that

can be accumulated on the ball. To prevent static spark, an antistatic device is placed on the valve to

derive the electric charge accumulated on the ball(as show in the figure)

 

 

6. Lock device

To prevent misoperation and the unexpected open or closed caused by the unpredicted circuit vibration,

a locking device is designed at the fully opened and closed positions of hand operated ball valve. This

design is proven especially good and effective in the production line of inflammable mediums of petroleum

and chemicals, or when valves are mounted outdoors.

 

7. Full and reduced bores structure

To meet the different requirements of users, we have full and reduced bore valves series(as shown in

the figure). The inside diameter of full-bore series ball valve is comparatively lighter in weight, but

its fluid resistance is only 1/7 of that of globe valve of the same caliber. So, reduced-bore ball valves

boast of broader prospects.

 

8. Discharge device on valve body

If requested by users or by the system, discharge valve may be mounted on the body of ball valve. In

case the two ends of valve have been sealed, the pressure in valve will be released through the

discharge valve on the body. Besides the function of DBB, this discharge valve also functions to rinse

and blow out the deposits inside valve body.

 

9. Corrosion resistance

corrosion allowance is left for the design of body thickness, the stem, fixed shaft, ball, seat and bottom

cover of carbon steel valve are all chemical plated in surface to ASTM B733 and B656. Use of paint from

international co. to deal with all kinds of conditions.

 

10.Sulfide stress cracking resistance

the materials exposed to fluid of our sulfur resisting ball valves, including fastening components, are all

selected to NACE MR0175. Rigorous quality control and inspection is implemented in the manufacturing

process to make our products conformed to the standard and suitable for vulcanizing conditions.

 

11. Extension bar device

extension device may be provided for buried ball valve, which include the extension of valve stem,

greasing valve and discharge valve. As shown in the figure, users shall specify the requirements and

length to be extended(the length is generally the distance from the center of valve channel to the

center of operating device).

 

 

 

 

 

  Material
No.part nameCarbon steel series

Stainless

steel series

Low

temperature

steel series

resist sulfur series
  GB standardNACE standard
1ballA105+ HCr/ENP

A351 CF8,

CF8M,CF3,CF3M

A352 LCB,

LCC+ENP

A105+HCr/ENPA351 CF8M+ENP
2bushingMetal + PTFE; sinter carbon fiber
3seal ring

PTFE, RPTFE, sinter carbon fiber, macromolecule polymer nylon,

MOLON,DELRIN or PEEk

4seatA105+ HCr/ENPA182,F304,F316A182,F6aA105+HCr/ENPA182,F316
5O ringFluorin rubber
6

fireproofing

gasket

Flexible graphite + stainless steel
7support ringA105+ HCr/ENPA182,F304,F316A182,F6aA105+HCr/ENPA182,F316
8SpringINCONEL 750
9O ringFluorin rubber
10Grease valveSame as body material
11WasherFlexible graphite + stainless steel
12BonnetA216 WCB

A351 CF8,CF8M,

CF3,CF3M

A352 LCB,LCCA216 WCBA351 CF8M
13StudA193 B7A193 B8,B8MA 320 L7A193 B7MA193 B7M
14NutA194 2HA194 8MA194 4A194 2HMA194 2HM
15StudA193 B7A193 B8,B8MA 320 L7A193 B7MA193 B7M
16BoltA105+ HCr/ENPA182,F304,F316A182,F6aA105+HCr/ENPA182,F316
17WasherPTFERPTFE CopperRPTFE
18StudA193 B7A193 B8,B8MA 320 L7A193 B7MA193 B7M
19Small ballA182 F304
20Under coverA105+ HCr/ENPA182,F304,F316A182,F6aA105+HCr/ENPA182,F316
21WasherFlexible graphite + stainless steel
22O ringFluorin rubber
23Grease valveSame as body material
24BodyA216 WCB

A351 CF8,CF8M,

CF3,CF3M

A352 LCB,LCC A351 CF8M
25bushingMetal+ PTFE; sinter carbon fiber
26

Discharger

valve

Same as body material
27SpringA 182 F304
28keyGB/T699 45
29StemA182 F6aA182,F304,F316A182,F6aA182 F304A182 F304
30bearingMetal+ PTFE; sinter carbon fiber
31O ringFluorin rubber
32WasherFlexible graphite + stainless steel
33stem seatA105+ HCr/ENPA182,F304,F316A182,F6aA105+HCr/ENPA182,F316
34StudA193 B7A193 B8,B8MA 320 L7A193 B7MA193 B7M
35PackingFlexible graphite, PTFE
36

Packing

bushing

A182 F6A182,F304,F316A182 F304A182 F6A182 F316
37GlandA216 WCBA351 CF8,CF8MA351 CF8A216 WCBA351 CF8M
38StudA193 B7A193 B8,B8MA 320 L7A193 B7MA193 B7M
39StudA193 B7A193 B8,B8MA 320 L7A193 B7MA193 B7M
40YokeA216 WCBA351 CF8A352 LCBA216 WCBA351 CF8M
41StudA193 B7A193 B8,B8MA 320 L7A193 B7MA193 B7M
42

Driver

device

Pneumatic, Electric, Worm gear, Hydraulic operated

 

 

Pressure; PN1.6MPa CLASS150

 

 

SizeLdManualWorm operatorPneumatic operatorElectric operator
DNNPSRFWERJMMoBBoB1B2AA1A3A4DD1Do
502"17821619149107230////21717489181///
652-1/2"19124120362125400////308248148257///
803"20328321674152400////318258148257///
1004"229305241100178650////407322287287///
1255"356381 1252521050////480395287287///
1506"3944574061502721050378400200106562457378378554337508
2008"457521470201//421400200108700595378378606421508
25010"533559546252//482400200108735630378378667482508
30012"610635622303//549600330144858728530530734549508
35014"686762699334//5826003301441013883530530784582508
40016"762838775385/

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