The one-piece threaded ball valve belongs to the Guangdong-style ball valve category. It uses a ball as the closing element, and opening and closing are controlled by rotation around the valve body's centerline. It is mainly used in petrochemical, urban water supply and drainage, and other applications requiring strict media shut-off. It features an internal thread connection, a compact structure, and light weight. The valve body and core components are mostly made of stainless steel (such as SS316), and the sealing material is polytetrafluoroethylene (PTFE), providing corrosion resistance.
This valve employs a single-seat design to prevent abnormal pressure rise in the central cavity, and its top-entry structure supports online maintenance. Its nominal pressure ranges from 1.6 to 6.4 MPa, and its applicable temperature range is -20℃ to 350℃. It can handle water, oil, gas, and some corrosive liquids. Frictionless separation of the ball and seat is achieved through mechanical transmission via the valve stem.
Combined with wedge seals and self-cleaning functions, it effectively reduces media erosion and buildup. Nominal diameters range from 1/4 inch to 2 inches to adapt to different piping system requirements. Some designs incorporate spring biasing devices and multiple sealing structures to improve sealing reliability under long-term operating conditions.
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One-Piece Threaded Ball Valve Technical parameters
Type: 2 Way
Material: Stainless Steel, ASTM A351-CF8M
Size: 1/4″ to 1″
Connection: BSPP
Working Pressure: 3000 PSI to 10000 PSI
Working Temperature: -20°C to 200°C
Handle Material: AISI 304
Applicable Medium: Oil, Gas, Water
Compliance/Certifications: ISO-5211
| Type | Reduced Bore, 2 Way |
| Ball Material | Stainless Steel |
| Attachment Type | Threaded |
| Thread Standard | BSPP |
| Thread Size | 38.1mm |
| Body Material | Stainless Steel |
| Safe for Use With | Gas, Oil, Water |
| Handle Type | Lever |
| Handle Material | PVC Coated Steel |
| Maximum Working Pressure psi | 1000psi |
| Operating Pressure | 68bar |
| Handle Colour | Blue |
| Maximum Working Pressure bar | 68bar |
| ITEM | PARTS | MATERIAL | |
| 1 | BODY | ASTM A351-CF8M | ASTM A351-CF8 |
| 2 | RETAINER | ||
| 3 | BALL | ASTM A351-CF8M | |
| 4 | SEAT A | PTFE / RTFE | |
| 5 | SEAT B | ||
| 6 | STEM | AISI 316 | AISI 304 |
| 7 | THRUST WASHER | PTFE | |
| 8 | PACKING | ||
| 9 | GLAND RING | AISI 304 | |
| 10 | SPRING WASHER | ||
| 11 | STEM NUT | ||
| 12 | HANDLE | ||
| 13 | HANDLE SLEEVE | PLASTIC | |
Qatari customer's custom-designed one-piece threaded ball valve drawings
One-Piece Threaded Ball Valve Unit: mm
| DN | d | L | W | H |
|---|---|---|---|---|
| 8 | 5 | 39 | 71 | 33 |
| 10 | 7 | 44 | 91 | 35 |
| 15 | 9.2 | 55 | 95 | 40 |
| 20 | 12.5 | 59 | 95 | 44 |
| 25 | 15 | 69 | 113 | 50 |
| 32 | 20 | 77 | 113 | 57 |
| 40 | 25 | 81 | 141 | 64 |
| 50 | 32 | 97 | 141 | 68 |
| 65 | 38 | 127 | 190 | 85 |
| 80 | 50 | 153 | 190 | 90 |
One-Piece Threaded Ball Valve Unit: in
| NPS | d | L | W | H |
|---|---|---|---|---|
| 1/4″ | 0.2 | 1.54 | 2.8 | 1.3 |
| 3/8″ | 0.28 | 1.73 | 3.58 | 1.38 |
| 1/2″ | 0.36 | 2.17 | 3.74 | 1.57 |
| 3/4″ | 0.49 | 2.32 | 3.74 | 1.73 |
| 1″ | 0.59 | 2.72 | 4.45 | 1.97 |
| 1-1/4″ | 0.79 | 3.03 | 4.45 | 2.24 |
| 1-1/2″ | 0.98 | 3.19 | 5.55 | 2.52 |
| 2″ | 1.26 | 3.82 | 5.55 | 2.68 |
| 2-1/2″ | 1.5 | 5 | 7.48 | 3.35 |
| 3″ | 1.97 | 6.02 | 7.48 | 3.54 |
One-Piece Threaded Ball Valve Structural Features
1. Frictionless Opening and Closing: This function completely solves the problem of sealing issues caused by friction between sealing surfaces in traditional valves.
2. Top-Entry Structure: Valves installed on pipelines can be directly inspected and maintained online, effectively reducing plant downtime and lowering costs.
3. Single-Seat Design: Eliminates the safety issues caused by abnormal pressure increases in the valve cavity.
4. Low-Torque Design: The specially designed valve stem allows for easy opening and closing with just a small handle.
5. Wedge-Shaped Sealing Structure: The valve seals by using the mechanical force provided by the valve stem to press the ball wedge against the valve seat, ensuring reliable sealing performance unaffected by pipeline pressure differences under various operating conditions.
6. Self-Cleaning Structure of the Sealing Surface: When the ball tilts away from the valve seat, the fluid in the pipeline flows uniformly along the ball's sealing surface at 360°, eliminating localized scouring of the valve seat by high-speed fluid and washing away accumulated deposits on the sealing surface, achieving self-cleaning.
One-Piece Threaded Ball Valve Applications
Petrochemical Industry
Used to shut off or distribute corrosive media (such as acid and alkali solutions) and prevent leakage.
Urban Water Supply and Drainage
Controls water flow direction, enables rapid opening and closing, and reduces water hammer effect.
Food and Pharmaceutical Industries
Made of sanitary-grade stainless steel to meet cleanliness requirements and prevent media contamination.
Steam Systems
High-temperature drain ball valve design prevents media leakage and is suitable for steam pipelines.
One-Piece Threaded Ball Valve factory
