铸钢固定式球阀

固定式球阀都带有浮动阀座，受介质压力后，阀座产生移动，使密封圈紧压在球体上，以保证密封。通常在与球体的上、下轴上装有轴承，操作扭距小，适用于高压和大口径的阀门。

Fixed ball valve with floating seat medium pressure, seat movement, seal pressed in on the ball,to ensure the sealed. Usually in the sphere of the upper and lower shaft with bearings, smalloperation twist, suitable for high pressure and large diameter valves.

1.阀杆防吹出设计

阀杆与球是独立的，阀杆靠近球的一端设计成整体结构，压盖法兰可挡住该T型阀杆，避免被内腔压力吹出。

2.防静电装置处

阀杆上装有弹簧接地塞钉，使球、阀杆与阀体之间相接触，形成导通电路，可将电荷转移，从而避免阀门开关时摩擦产生静电积聚或流体冲击阀体内腔产生静电积聚。这种静电积聚对一些危险区域内的管线来说是极其危险。

1. Blow-out proof stem

design Both stem and body are separated, the stem part connected with theball is integral and the gland can hold down the T type stem, whichcould protect the stem blown out.

2. Anti-static device

The anti-static device mainly used in the special ball vale. A groundplug installed on the stem to form the current path and charge transferwhen contacting with body and ball, in this way, it can avoid the build-up of static electricity due to friction or electrostatic accumulation fromfluid impacting on the body cavity when on and off valve. Thiselectrostatic accumulation is extremely dangerous in hazardous areas.

超强防火设计

防止外漏

在正常情况下，双O型圈加压盖石墨垫片的设计可防止阀杆处的泄漏，O型圈加阀体石墨垫片也保证了阀体，阀盖连接部位的密封，当火灾发生时，O型圈因溶化而失效，此时压盖石墨垫片，阀体石墨垫片和阀杆石墨填料将承担防止流体外泄漏功能。

防止内漏

火灾发生时，当非金属材料如O型圈，软密封座圈和阀座挡圈被分解或溶化后，则二道密封的金属座圈唇在弹簧的预紧力作用下将推向球体接触而阻断管线流体，最大程度减小阀门通道中的内漏。另外，柔性石墨座圈填料同时受座圈压缩而密封，阻流体在阀体与座圈间泄漏。

Avoid external leakage

In the normal circumstance, 0 ring and graphite gasket not only canstop the leakage from the stem but also ensure the sealing connectingbetween body and cover. If fire happened, the 0 ring will be bumed offand lose its function, but the graphite gasket of gland, body and stemcan replace the O ring to prevent leakage.

Avoid internal leakage

In case of fire, the non-metal material e.g.: 0 ring, soft seal seat andseat retainer ring will be broken down and melted, at this time, thesecond sealing metal seal lip is pushed up to contact the ball and stopleaking under the pre-tightening force of spring, which could lowerintemal leakage on the greatest extent. Moreover, the flexible graphitepackings compressed by seat ring can prevent the leakage betweenbody and seat ring.

紧急注脂装置

6"(150)和6"以上的固定球阀，阀杆和座圈上均装有注射密封脂装置。当密封材料(密封环或O型圈)被火灾或其他意外事故破坏分解时，向该注射器注射密封脂可阻止源自阀杆和座圈的泄漏，该装置内设一道止回阀起后备密封作用。

mergency sealant injection valve device

Sealant in serted in the position of stem and seat ringfor the trunnion-mounted ball valve 6" and above 150 class. If thesealing material (Sealing ring or 0 ring) is broken down and melted inthe fire or other incident, the leakage from stem and seat ring can berestrained by injecting sealant to the valve, there is also a check valvethat can prepare to make a sealing.

双阻断及泄放功能

固定球阀两阀座能独立切断进口端和出口端流体，如此实现双阻断功能。当球体关闭时，即使阀门两面同时受压，阀门中腔和两端通道是被互相阻断的，中腔中的剩余介质可通过泄放阀排出。

DBB (double-block -and-bleed) function

The double seats of trunnion-mounted ball valve can individually isolateand block the flow of fluid from downstream to upstream, it can realizeDBB function. After closing the valve, the ball cavity and the both sidepipeline will be isolated and blocked even though the both sidesstressed from the fluid, the remaining medium could be released bythe vent valve.

当阀门中腔压力(PC)小于座圈弹簧的预紧力(FS)和管线流体压力

反之，当阀门中腔压力(PC)大于座圈弹簧的预紧力(FS)和管线流体压

(P1),即OP*D1> FS,则球体和阀座预紧力接触确保密封。

力(P1)，即OP*D1> FS时，中腔压力将座圈轻微推开，使之与球体之间产生一小间隙，这样内腔过载压力自动泄放到管线中，重新达到阀门中腔和管线(_上下游)的压力平衡。

If the pressure of cavity(PC) less than set ring spring pre-tightened

Vice versa, If the pressure of cavity(PC) larger than set ring spring

stres(FS) and fluid pressure(P1): OP*D10 FS, good sealing can be

pre-tightened stress(FS) and fluid pressure(P1): OP*D1>FS,The

realized when ball contacts with seat.

body cavity pressure pushes slightly the seat ring away, and therewill be a ltte gap between seat ring and ball, in this way, theoverloading pressure will be bled off into the pipeline and achievepressure balance again.

基本设计

使用温度: -29C~100C;-46C~150"C

压力等级:下列最高工作压力为碳钢阀体常温时的极限工作压力，

Pressure rating-- -The below working pressure refers to the maximum

各种阀体材质工作压力与温度对应，详见温度压力线表。

working pressure for carbon steel body. More details of all body material'sworking pressure and temperature, check the temperature and pressuretable.

it: F:iS3TFE R:XtR N:/EJ

Note:F: Reinforced TFE, R: Synthetic rubber, N: Nylon

Basic design

T8Eâ -API6D;ANSIB16. 10;GB12221-05

Face to face dimension according to API6D;ANSIB16. 10;GB12221-05Flange ends standard according to ASMEB16.5;MSS SP44;JB79-94

itÈt0t8 -ASMEB16.5;MSS- SP44;JB79-94

Welding ends according to ASMEB31.8;ANSIB16.25

#8 -ASMEB31.8;ANSIB16.25

Working temperature 29%C- 100"C;-46'C~150"C