Product Code :
Fully welded fixed ball valve in line with API6D standards, can be equipped with sleeves according to customer needs, buried operation elevation, etc. Operating temperature -46~200℃, especially suitable for large diameter, high pressure pipeline fluid control. This series of fixed ball valves has double blocking and discharge functions. All welding has the characteristics of less leakage and reliable sealing. This series of valves are certified by Lloyd's Register in accordance with API 607 and API 6FA fire tests.
Size: 2""~60""(DN50~DN1500)
Pressure rating: ASME CLASS 150~1500(PN16~PN250)
Main material: carbon steel
Connection form: BW, (FLNG)
Operation mode: manual, pneumatic, electric, electro-hydraulic linkage, gas-hydraulic linkage, etc
Please contact us if you need customized services. We will contact you with the price and availability in 24 hours.
Features
Integral welded ball valve doesn't have external leakage phenomenon.
The valve seat is composed by carbide Teflon seal ring and belleville spring, so it is adaptable for the change of pressure and temperature. It won't produce any drainage within the marked range of pressure and temperature.
The machining process of sphere is traced and checked by advanced computer detector, so the sphere has high machining accuracy.
The valve body material is the same as pipe material, so there will be no unbalanced stress, and it won't distort due to earthquake and the vehicle going through the ground. The pipe has resistance to aging.
Sealing ring uses RPTFE material with 25% Carbon, which ensures no leakage.
Directly buried type welded ball valve can be directly buried underground, people don't have to build a high large valve well, they only need to set up small shallow wells in the ground, which greatly saves the construction cost and the project time.
According to the demand of pipeline construction and design, people can adjust the length of the body and the height of the valve stem.
The machining precision of sphere is very precise, convenient operation, no harmful interference.
Adopting advanced raw material, ensure the pressure over PN25.
Compared with the same specification products in similar industry, the body is smaller, and more beautiful.
Service life more than 15 years in the event of normal operation and usage of the valve.
Main parts and materials
The valve body: ST37
Ball core: SS304
The valve stem: 2Cr13
The valve seat: PTFE- C carbon fiber
Installation
The valve assembly
1. Lifting the valve in the right way, making the body bearing the load.
Warning: Other prominent part. The support lug and the valve side neck is the correct position of the chain hoist. Do not tie chain hoist onto hand wheel, gear box, or actuators.
2. If the valve is equipped with lifting lugs, then lift the valve by lugs.
3. During the period of lifting valve, remain the valve end protection cover in its place, the protection cover can be removed only when the valved is completely installed.
Warning: during lifting, please protect the end face of the valve and the parts from being damaged, or the valve would be damaged.
Position of the valve: Ball valve can be installed in any position, please put grease on exposed surface of the valve ball, which can protect it from being damaged by splash slag.
The valve ball protection
Warning: when being installed, he valve ball should remain in the fully open position, or it will be damaged.
If the valve should remain in closed position when being installed, please smear grease to the exposed surface of the valve ball.
Warning : please don't place the valve in half-open state for a long time.
Warning: for no-take-over butt welding end valves, please don't install valve on the off-position of the ball.
Welding Introductions
When preheating, welding or heat stress releasing, the temperature of any point 3"away from weld joint on the body can not exceed 400 F(200C). Please use thermopile stick to test temperature. Before welding the ball valve in pipeline in the end, people should use 1"wide protective belt to cover the valve seal from 3 o 'clock to 9 o 'clock area(the seal between the ball and the seat and the seal between the seat and the end). This contributes to prevent any impurity falling into this area. Before starting and testing pressure, the impurity should be cleared away from the pipeline system.
Pressure test:
1. strength test. Strength test takes water as medium. Welding high pressure test valve on both sides of the valve sleeves. After opening the valve to 45 degrees Celsius location, injecting water into ball valve through the pressure test valve on the valve sleeves. Boost to 1.5 times of the ball valve nominal pressure, maintain pressure for 15min. Qualified if without leakage.
2. leak test. Leak test takes nitrogen as medium. Close the ball valve. Inject nitrogen into on side of the valve through pressure test valve on the valve sleeves. Boost to 1.1 times of the ball valve nominal pressure, the vent valve on the sleeve on the other side connects the hose and pumps into the water container to carry on test. The insertion depth is 1cm, qualified if no air bubbles within 5min.
Operation time
Quick operation time
Quickly opening or closing the valve will cause distortion and load of the valve, so it is necessary to limit the valve operating time to protect the valve from the damage of over-stress. Using the following formula to calculate time can operate the valve safely: quick operation time = the valve ball nominal dimension/2 If you need to operate the valve faster, please consult the local representative office.
The longest operating time
In the process of operating the valve, the seat surface is exposed. In order to reduce the time of the seat surface being exposed, here recommend the following the longest operating time: the longest operating time = 5 × nominal ball size of the valve(eg: each inch of nominal ball size 1min) Time unit is seconds, the unit of the ball mouth is inches.
Warning: operating the valve without according to the above provisions will result to the damage of the valve.
City Gas: Gas output pipelines, trunk and feeder supply lines etc.
Central heating: large heating equipment output pipeline, trunk and feeder
Heat exchanger: opening and closing of the pipes and the loops
Iron and steel plant: all kinds of fluid pipes, exhaust pipes, gas and heat supply pipelines, the fuel supply lines
All kinds of industrial equipment: all kinds of heat pipes, industrial gas and heat distribution pipelines
Packing of Standard Packing:
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2022 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
