The two-piece threaded ball valve is a type of ball valve designed with a two-piece valve body structure and threaded connection. It features convenient disassembly and assembly, simple maintenance, and strong applicability, and is widely used in fluid control of small and medium-sized pipeline systems. Its core advantage lies in the quick disassembly of the valve body, which facilitates internal cleaning, maintenance, or replacement of seals, making it particularly suitable for scenarios with high cleanliness requirements or frequent maintenance.
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Two-Piece Threaded Ball Valve Technical parameters
Material: Stainless Steel (SS304, SS316)
Size: 1/4″ to 3″
Connection: Thread, NPT, BSPT, BSPP (G)
Working Pressure: Up to 1000 PSI
Working Temperature: -20°C to +180°C
Sealing: PTFE
Applicable Medium: Oil, Gas, Water
Manufacturing Standard: ANSI, ASME, GB, customizable as per customer's drawing
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| ITEM | PART | MATERIAL |
| 1 | Body | SS 316 |
| 2 | Cap | SS 316 |
| 3 | Ball | SS 316 |
| 4 | Gasket | PTFE |
| 5 | Seat | PTFE/RTFE |
| 6 | Thrust Washer | PTFE |
| 7 | Stem Packing | PTFE |
| 8 | Gland Nut | SS 304 |
| 9 | Stem Washer | SS |
| 10 | Stem | ASTM A182-F304 |
| 11 | Stem Nut | SS |
| 12 | Locking Device | SS 201 |
| 13 | Handle | SS 201 |
| 14 | Plastic Cover | Plastic |
Two-Piece Threaded Ball Valve Structure and Features
Two-Piece Valve Body Design
Structure: The valve body consists of an upper and lower section connected by bolts or clips, with the ball and seat held in between.
Easy Assembly and Disassembly: The valve body can be separated by loosening the connecting bolts without disassembling the pipeline, facilitating internal maintenance or seal replacement.
Sealing Performance: O-rings or metal gaskets are used at the valve body connections to ensure no leakage.
Threaded Connection Methods
Internal Thread (G/NPT/BSPP): Suitable for small to medium-sized pipelines; directly screwed into the pipeline for quick installation.
External Thread (BSPT/NPT): Adaptable to special pipeline designs, offering high flexibility.
Dual Thread Option: Some models support one internal thread and one external thread, providing greater adaptability.
Core Components of the Ball Valve
Ball: Hollow design with a surface hardening treatment (such as tungsten carbide coating), wear-resistant and corrosion-resistant.
Valve seat: Metal hard seal (STL alloy) or soft-hard composite seal (metal + PTFE), adaptable to different media and operating conditions.
Valve stem: Anti-blowout design, equipped with an anti-static device to ensure safety under high pressure.
Advantages of two-piece threaded ball valve:
Quick disassembly and maintenance
No pipe disconnection required: The two-piece valve body can be separated by loosening the valve body connecting bolts, and the ball and valve seat can be directly removed for cleaning or replacement.
Reduced maintenance costs: Reduces downtime and avoids additional workload caused by disassembling pipelines.
High sealing performance and pressure resistance
Sealing performance: Metal hard seal or soft-hard composite seal, leakage rate meets API 598 standard.
Pressure resistance: Design pressure up to PN40 (4MPa) to PN100 (10MPa), meeting the needs of medium and high pressure conditions.
Flexible operation and wide applicability
Manual operation: Handle or gearbox operation, suitable for low-frequency or manual control scenarios.
Automation Compatibility: Can be equipped with electric or pneumatic actuators for remote control.
Media Compatibility: Water, steam, oil, natural gas, acid and alkali solutions, etc.
Compact and Lightweight Design
Small Size: The two-piece design reduces valve body size, suitable for space-constrained installation environments.
Lightweight: Lighter than three-piece or flanged ball valves, facilitating handling and installation.
Applications of Two-Piece Threaded Ball Valve
Industrial Piping Systems
Used for small to medium-sized pipeline branch control, flow regulation, or emergency shut-off in chemical, oil, and natural gas industries.
Water Treatment and Environmental Engineering
Used for fluid control in wastewater treatment and circulating water systems.
HVAC Systems
Used for hot and cold water piping control in building air conditioning systems.
Food and Pharmaceutical Industries
Used for the transport control of clean fluids (such as drinking water and pharmaceutical solutions).
Energy and Power Industries
Used for opening, closing, or regulating steam pipelines and heating networks.
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