Stainless Steel 3 Piece Ball Valve Plain
Technical Specification
- Material: Stainless Steel
- Connection: Socket Weld Ends
- Sizes Available: 1/4" - 3"
- Pressure Rating:
- 1/4" to 1": 82 bar
- 1 1/4" to 1 1/2": 69 bar
- 2" to 3": 62 bar
- Operating Temperature: -25°C to +200°C
- Bore: Reduced Bore
- Features: ATEX approval and locking device.
Description
This stainless steel three-piece ball valve is fitted with socket weld ends, making it particularly well suited to high-pressure and high-temperature pipework systems where a permanent, leak-free connection is required. The socket weld configuration provides a strong, reliable joint and is commonly specified in process industries such as oil and gas, chemical processing, and power generation. The three-piece body construction offers a significant maintenance advantage, allowing the central valve body to be removed from the pipeline for inspection, cleaning, or ball replacement without disturbing the welded end connections, keeping downtime to a minimum.
Constructed with a CF8M stainless steel body and stainless steel 316 ball and stem, it delivers excellent corrosion resistance and consistent performance under demanding conditions. The full-bore design ensures maximum flow capacity, minimising pressure drop across the valve. PTFE seals throughout provide low-friction, chemically resistant operation across a working temperature range of -25°C to +200°C. The integrated locking lever prevents inadvertent operation, adding an additional layer of safety in critical installations. ATEX approved, this valve is also suitable for use in potentially explosive atmospheres. Available in ten sizes from 1/4" to 3".
Typical Applications
Key Features & Benefits
- Socket Weld Ends: Provides a strong, permanent, leak-free connection, making this valve ideal for high-pressure and high-temperature pipework systems in demanding process industries.
- Three-piece Construction: The central body can be removed from the pipeline without disturbing the welded end connections, enabling straightforward in-line maintenance, cleaning, and ball replacement with minimal downtime.
- ATEX Approved: Certified for use in potentially explosive atmospheres, making this valve suitable for hazardous industrial environments.
- Full-bore Design: Unrestricted flow path minimises pressure drop and accommodates pipeline pigging where required.
- PTFE Seals: Low-friction, chemically resistant sealing throughout ensures long service life and reliable shut-off performance.
- Locking Lever: Integrated locking device prevents unintended valve operation, enhancing safety in critical or high-risk applications.
Pressure & Temperature Relationship


Dimensions & Materials


| Part | Description | Material |
| 1 | Body | Stainless Steel (CF8M) |
| 2 | Ball Seat | R-PTFE (15%) |
| 3 | Ball | Stainless Steel (316) |
| 4 | Body Gasket | PTFE |
| 5 | Cap | Stainless Steel (CF8M) |
| 6 | Spring Washer | Stainless Steel (304) |
| 7 | Nut | Stainless Steel (304) |
| 8 | Bolt | Stainless Steel (304) |
| 9 | Stem | Stainless Steel (316) |
| 10 | Thrust Washer | PTFE |
| 11 | Stem Packing | PTFE |
| 12 | Gland Nut | Stainless Steel (304) |
| 13 | Handle | Stainless Steel (304) |
| 14 | Spring Washer | Stainless Steel (304) |
| 15 | Nut | Stainless Steel (304) |
| 16 | Lock Device | Stainless Steel (304) |
| 17 | Handle Cover | Plastic |
| Product Code | DN (") | D (mm) | P (mm) | L (mm) | H (mm) | W (mm) | Torque | Kv | Weight (kg) |
| 353805 | 1/4 | 14.0 | 10 | 50 | 51 | 105 | 4 | 6.43 | 0.37 |
| 353806 | 3/8 | 17.6 | 10 | 60 | 51 | 105 | 4 | 15.71 | 0.37 |
| 353807 | 1/2 | 21.7 | 10 | 75 | 53 | 118 | 5 | 26.19 | 0.52 |
| 353808 | 3/4 | 27.3 | 13 | 80 | 60 | 118 | 8 | 34.42 | 0.71 |
| 353809 | 1 | 34.1 | 13 | 90 | 75 | 150 | 10 | 53.87 | 1.01 |
| 353810 | 1 1/4 | 42.8 | 13 | 110 | 80 | 150 | 14 | 78.56 | 1.72 |
| 353811 | 1 1/2 | 48.7 | 13 | 120 | 88 | 182 | 18 | 127.20 | 2.33 |
| 353812 | 2 | 61.0 | 16 | 140 | 95 | 182 | 25 | 205.16 | 3.75 |
| 353813 | 2 1/2 | 77.0 | 16 | 185 | 121 | 254 | 48 | 379.35 | 7.63 |
| 353814 | 3 | 90.0 | 16 | 205 | 135 | 254 | 75 | 677.14 | 11.75 |


