Model No.: Q41
Fully welded ball valves are used mainly in Gas transmission and distribution pipeline (Mid-stream), typical for underground and buried installation The ball is fixed and the seat rings are floating, free to move along the valve axis.
Side load generated by pressure acting on the ball is absorbed by bearings.
At low pressure the seat sealing acting is achieved by the thrust of the springs acting on the seat. As the pressure increases the fluid pressure pushes the seat rings against the ball, making the sealing more reliable.
Features and Benefits
Upstream Sealing At low pressure, seat-to-ball contact is maintained by Belleville springs. At higher pressures, seat contact is reinforced by line pressure.
Automatic Internal Relief of Body Pressur Relief of excess body cavity pressure is automatic, avoiding dangerous pressure buildup. Any pressure exceeding downstream line pressure by approximately 200 psi pushes the downstream seat away from the ball, allowing the pressure to relieve into the pipeline.
Rotating Seat Rings The exclusive rotating seat feature is standard in the Qilong Fully Welded Ball Valve sizes 14” (350 mm) and larger. Both seats rotate 15 degrees each time the valve is closed, exposing a new pinch point and evenly
Distributed Seat Wear
The pinch point is the area of the seat insert that experiences an increased velocity when the valve is seated closed and unseated open. This is where the seat seal experiences the most wear, and in most valves, where a leak path begins. By rotating the seat ring, the pinch point wear is distributed throughout the seat seal, providing an increase in seat life.
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Yongjia South Trading Co.,Ltd
Yongjia South Trading Co.,Ltd is joint venture company of Zhejiang Chaolian Valve Co.,Ltd(http://www.sl-v.cn) which was established in 2016 with the target to prompt industry stainers and all type of valves business worldwide easily and effectively. All our team members are come from reputable factory in Oubei Town, Wenzhou City with average 8 years working experiences.
We have stable relationship with professional factory for high pressure valve, industrial strainer, plug valve, butterfly valve, Ball Valve, valve spare parts as well as casting/forging foundry. Compare with Other factory or trading company, we can have better support from the factory in price, technical specification response, delivery time, payment term and prompt aftersale services.
The main partners we worked together since 2016 are foucs on power station valve, high pressure gate valve, High Pressure Check Valve, Y Type Strainer, basket Type Strainer, lubricate plug valve, trunnion metal seal ball valve, double offset or triple offset betterfly as well as wafer dual plated Check Valve etc.
Any suggestions for cooperation will be highly welcomed. Yongjia South Trading Co.,Ltd can be your partner for products search, order purchasing, order tracking & inspection and even can be your purchase agent. The team members are familar with local market and have professinal skills in controlling of raw material supply, manufacturing process, final hydraulic test, package and shipment. Photos, videos for each critical stage can be given as well as weekly progress report according to the requirements of the customer.
- Company Name: Yongjia South Trading Co.,Ltd
- Representative: Jin Xilei
- Product/Service: Power Station Valve , High Pressure Gate Valve , High Pressure Check Valve , Y Type Strainer , Basket Type Strainer , Wafer Dual Plate Check Valve
- Capital (Million US $): 100,000RMB
- Year Established: 2016
- Total Annual Sales Volume (Million US $): Below US$1 Million
- Export Percentage: 91% - 100%
- Total Annual Purchase Volume (Million US $): Below US$1 Million
- No. of Production Lines: 2
- No. of R&D Staff: 5 -10 People
- No. of QC Staff: 5 -10 People
- OEM Services Provided: yes
- Factory Size (Sq.meters): 5,000-10,000 square meters
- Factory Location: Dongou Industry Zone, Oubei Town, Wenzhou City, China PR
- Contact Person: Mr. Jack
- Tel: 0086-577-67299368