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API6D FULL BORE BALL VALVE FLOATING BALL A105 BODY SS316 BALL 300LB RTJ 8INCH

Categories Full Bore Ball Valve
Brand Name: GOLD TOP
Model Number: Q41F
Certification: API6D
Place of Origin: 中国
MOQ: 1pcs
Supply Ability: 100+pcs+25days
Delivery Time: 5~35days
Packaging Details: wooden box
MATERIAL: A105
connection: RTJ
pressure: 300LB
standard: ASME B16.34
Product description: Side-mounted ball valve
TRIM: SS316l
Connecting end: ASME B16.5、ASME B16.25
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API6D FULL BORE BALL VALVE FLOATING BALL A105 BODY SS316 BALL 300LB RTJ 8INCH

API6D FULL BORE BALL VALVE FLOATING BALL A105 BODY SS316 BALL 300LB RTJ 8INCH


The ball on a trunnion ball valve does not move with medium pressure. Trunnion ball valves have floating seats. This valve uses pressure actuated seats with locked-in non-metallic face seals. To assure tight sealing at low pressures, special springs force the seats against the ball. At higher pressures, the upstream seat is forced against the ball by the pressure working across the differential between the area of the seat insert and the seat O-Ring; the higher the pressure, the tighter the seal.

Sealant Injection Device

Trunnion mounted ball valves are provided with devices, which are on both the stem and the seat of the valves DN 150 (NPS6) and larger and in the body cavity for valves less than DN 125. When the stem o-ring or the body seating ring is damaged, the medium leakage between the body and stem can be prevented by injecting sealant through the device.


Double Block and Bleed

The pressure actuated seats and bleed fittings allow double block and bleed operation. When used for block and bleed, this feature permits the valve to take the place of two valves. It also allows the operator to check up and downstream sealing by bleeding off the body pressure.

Anti-static Design

The ball of the trunnion ball valve is in close contact with the trunnion, adjusting cushion, and trunnion end cap, thus providing a passage for static electricity to escape the confines of the valve.

Fire Safe Design

In case of fire, non-fireproof material for packing and seat will be burnt-out and considerable medium leakage may possibly cause the fire to spread. FBV uses metal to metal or graphite seals as an auxiliary safeguard to prevent medium leakage in cases of fire as shown in figures. The fire safe design confirms to the requirements of API607, API 6FA, BS 6755 and JB/T 6899.

FORGED FLOATING BALL VALVE

STRUCTURAL FEATURES
1. Special Seat Design
The floating ball valve adopts the design of flexible seal ring structure. When the medium pressure is lower, the contact area of seal ring and ball is smaller. so higher sealing ratio is formed at the place where the seal ring and ball contact to ensure reliable sealing. When the medium pressure is higher, the contact area of seal and ball becomes bigger along with the elastic deformation of seal ring, so the seal ring can endure higher medium thrust without being damaged.

2. Fireproof Structure Design
In case of fire during the use of valve, the seat ring made of PTFE or other non-metal materials will be decomposed or damaged under high temperature and cause higher leakage. The fireproof seal ring is set between ball and seat so that after the valve seat is burnt, the medium will push the ball rapidly towards the downstream metal seal ring to form the auxiliary metal to metal sealing structure, which can effectively control valve leakage. In addition, the middle flange sealing gasket is made of metal wound gasket, which can ensure sealing even under high temperature. The fireproof structure design of floating ball valve conforms to requirements in API 607,spi 6FA,BS 6755 and other standards.

3. Reliable Sealing Of Valve Stem
The stem is provided with the shoulder at its bottom so that it will not be blown out by the medium even under the extreme conditions such as abnormal pressure rise inside the valve cavity, failure of gland plate and etc. In addition, to avoid leakage after the stem packing is burnt in case of fire, the thrust bearing is set at the place where the stem shoulder and body contact to form a reverse sealing seat. The sealing force of the reverse seal will increase according to the increase of medium pressure, so as to ensure reliable stem sealing under various pressure, prevent leakage and avoid accident spreading.

The stem adopts V type packing sealing structure. The V type packing can effectively change the pressing force and medium force of the gland into the sealing force of the stem.
According to user requirements, the disc spring loaded packing pressing mechanism can be adopted to make the sealing of stem packing more reliable.

4. Anti-static Structure
The ball valve is provided with anti-static structure and adopts the static electricity discharge device to directly form a static channel between the ball and body or form a static channel between the ball and body through the stem, so as to discharge the static electricity produced due to friction during the opening and closing of ball and seat through the pipeline, avoiding fire or explosion that may be caused by static spark and ensuring system safety.

5. Lock And Misoperation Prevention
The manual ball valve can be locked by a lock when it is at the full open or full close position. The 90°open and close positioning piece with lock hole is designed to avoid valve misoperation caused due to handle operation by non-opearators, and it can also prevent valve opening or closing, or other accidents caused by pipeline vibration or unpredictable factors. It is very effective especially for inflammable factors. It is very effective especially for inflammable and explosive oil, chemical and medical working pipelines or field tubing. The part on the head of the stem that is installed with the handle adopts flat design. When the valve is opened, the handle is parallel to the pipeline, so that the opening and closing indications of the valve are guaranteed to have no error.

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