A small size two-piece ball valve is a type of valve used to control the flow of liquids or gases. It consists of two main parts: the body and the ball. The ball has a hole through the middle, which allows fluid to pass through when the valve is open. When the valve is closed, the solid part of the ball blocks the flow, showcasing the basic ball valve working principle common to many ball valve types. Small size ball valves are available in full port (full bore) for minimal pressure drop or reduced port (standard bore) for cost savings. End connection options include threaded, flanged, or welded types, allowing the 2 piece ball valve to accommodate diverse installation requirements across industrial and commercial applications.
In high-pressure or specialized configurations, a 2 piece trunnion ball valve may also be used, delivering enhanced stability, improved sealing, and more reliable industrial valve solutions under demanding conditions.
A 2 piece ball valve consists of two main components:
Valve Body (2 Sections) – Connected by threads or bolts for easy assembly
Rotating Ball – Features a bore (hole) that controls fluid flow
When the ball rotates:
Open Position → Fluid flows through the bore
Closed Position → Solid ball blocks the flow completely
This simple yet effective two piece ball valve design ensures reliable shut-off and long service life.
Compact Structure – Space-saving and lightweight
Tight Sealing Performance – Zero leakage capability
Easy Maintenance – Two-piece construction allows partial disassembly
Flexible End Connections – Threaded, flanged, or welded
Wide Pressure & Temperature Range
Corrosion Resistance (Stainless Steel Options)
The optimized two piece ball valve design offers several operational benefits:
Multiple connection types (threaded, flanged, welded) make installation flexible.
Compared to one-piece valves, the two-piece structure allows easier access to internal components.
Balances performance and cost, making it ideal for both industrial and commercial use.
Precision-machined ball and seats ensure tight shut-off even after long-term use.
Available materials for 2 piece ball valve include:
Stainless Steel (304/316) – Corrosion-resistant, hygienic
Carbon Steel – High strength, cost-effective
Alloy Materials – For high-temperature and high-pressure applications
| Material Specification | |||
| NO. | DESCRIPTION | SS304 | SS316 |
| 1 | BONNET | A351 CF8 | A351 CF8M |
| 2 | BOLT | A193 B8M | A193 B8M |
| 3 | NUT | A194 8M | A194 8M |
| 4 | GASKET | PTFE | PTFE |
| 5 | BODY | A351 CF8 | A351 CF8M |
| 6 | BALL | A182 F304 | A182 F316 |
| 7 | SEAL | PTFE | PTFE |
| 8 | ANTI-STATIC DEVICE | SS316 | SS316 |
| 9 | SAHFT | A182 F304 | A182 F316 |
| 10 | GASKET | PTFE | PTFE |
| 11 | O-RING | VITON | VITON |
| 12 | NUT | A194 8M | A194 8M |
| 13 | BOLT | A193 8M | A193 8M |
| 14 | LOCKING PLATE | STAINLESS STEEL | STAINLESS STEEL |
| 15 | GASKET | PTFE | PTFE |
| 16 | STEM | A182 F304 | A182 F316 |
| 17 | BOLT | A193 B8M | A193 B8M |
| 18 | HANDLE | STAINLESS STEEL+PVC | STAINLESS STEEL+PVC |
| 19 | NUT | A194 8M | A194 8M |
| 20 | BELLEVILLE WASHER | SS301 | SS301 |
| 21 | PACKING GALND | A182 F304 | A182 F316 |
| 22 | PACKING | PTFE | PTFE |
