الوصف

Fully welded ball valves are used mainly ingas transmission and distribution pipeline (Mid-stream), include PE end T type fully welded ball valve andT type extended stem fully welded ball valve.
 
Structure
1.T type fully welded ball valve is designed for three-pieces side mounting forge welding structure
2.Forged steel fixed ball valve  is designed with  floating valve seat, soft and metal two-stage seal, the primary seal is metal sealing, secondary seal is non-metal seal; generally speaking ,the secondary seal adopts Viton-AED, DEVLON, PEEK and all metal seal, etc.  
3.Ball valve body is fixed with built-in support plate structure
4.Valve fire test is made as per API**7 and BS ***5
5.With Anti-static and anti-blowout function
6.Valve seat structures designs are available in DBB, DIB or DBB and DB combinations
7.Valve driving  device mounting platform and interface  settings are designed according to ISO ***1 
8.The valve body is welded with a typical narrow gap arc multi-layer welding method, welding line is made with **0% ultrasonic inspection and hardness test .
9.Finite element analysis was used to analyze the simulated working conditions of the body shell strength, the force of the inner parts and the operating torque of the stem, so as to optimize the problems and weaknesses and ensure the valve performance optimization.
*0.The surface of the valve is coated with corrosion resistant asphalt, polyurethane or epoxy resin according to the specification to adapt to buried installation.
*1.Sealed emergency grease injection function
 
Technical parameter:
 
PE end T type fully welded ball valve  
Testing and inspection : GB/T ****7  
Size range: DN**-DN**0mm
Pressure range :PN1.6~PN4.0MPa  
Working medium temperature: **9℃~***0℃  
Drive mode: standard worm gear operated
 
T type extended stem fully welded ball valve:  
Design standard: API 6D, ASME B*6.*4  
Connection standard: Welded end ASME B*6.*5  
Face to face standard: API 6D, ASME B*6.*0  
Inspection standard: API 6D, API **8  
Size range: NPNS***8 (DN**-DN***0mm)  
Pressure range: Class ***-class ***0 (PN1.*-PN*2mpa)  
Working  temperature: *9℃~ ***0℃  
Driving mode: NPS*-NPS 4 (DN**-DN**0mm) handle, NPS*-NPS*8 (DN***-DN***0mm) standard worm gear selected  
Optional driving mode: pneumatic, electric, etc  
The dimension of valve connecting end  can be designed and manufactured according to user requirements  
 
Material detail
Valve body :A**5, A**0Lf2 and equivalent materials
A**2 F**4 and equivalent
Stem: ANSI ***0 +ENP, A**2 F**4 or equivalent
Valve ball : A**5+ENP, A**0 LF2+ENP and equivalent materials
ASTM A **2 and equivalent
Stem/sliding bearing seal:**4+PTFE
                       **6+PTFE
Ball seal: Viton-AED metal composite sealing
 
Application: Natural gas, city gas, oil field ,Urban heating system as an on-off device.