Stainless Steel Flanged Trunnion-Mounted Ball Valve
Description
TECHNICAL DATA SHEET
Stainless Steel Flanged Trunnion-Mounted Ball Valve
1. Product Overview
This valve is a heavy-duty, full stainless steel flanged trunnion-mounted ball valve equipped with a worm gear (handwheel) operator. The valve body, bonnet, and trim are constructed from ASTM A351 CF8M (Stainless Steel 316), offering exceptional resistance to corrosion, pitting, and crevice attack. It is specifically designed for severe service applications, including seawater, brine, desalination, chemical processing, and offshore marine environments, where standard carbon steel valves would rapidly degrade.
2. General Technical Specifications
| Parameter | Specification / Data |
|---|---|
| Product Name | Stainless Steel Flanged Trunnion-Mounted Ball Valve |
| Brand / Marking | SAVVY |
| Model / Type Code | LBBE (Bolted Body, Trunnion Mounted) |
| Nominal Diameter (DN) | DN350 (14″) |
| Nominal Pressure (PN) | PN25 / Class 150 (Marked as “25” on body) |
| Body Material | ASTM A351 CF8M (316 Stainless Steel) |
| Connection Type | Flanged (RF / RTJ) |
| Operation | Worm Gear Operated (Handwheel) |
| Design Structure | Trunnion Mounted, Bolted Body, Full Bore / Reduced Bore |
| Applicable Temperature | -29°C ~ +200°C (Dependent on seat/seal material) |
| Applicable Medium | Seawater, Brine, Acids, Alkalis, Water, Steam, Oil, Gas |
| Leakage Class | Zero Leakage (Bubble-tight) / API 598 / ISO 5208 Rate A |
3. Material of Main Parts (Full Stainless Steel Construction)
Based on the CF8M body marking and standard stainless steel valve configurations.
| Part Name | Material Specification |
|---|---|
| Body / Bonnet | ASTM A351 CF8M (316 Stainless Steel) |
| Ball | ASTM A182 F316 / CF8M with Chrome Plating or ENP |
| Stem | ASTM A182 F316 / 17-4PH (Stainless Steel) |
| Seat Ring | PTFE, RPTFE, PEEK, or Metal-to-Metal (Stellite) |
| Sealing O-Rings | Viton (FKM), PTFE, or EPDM |
| Bolting / Nuts | Stainless Steel A193 B8 / A194 8 |
| Worm Gearbox | Cast Iron / Aluminum Housing (External) |
| Coating | Bare Stainless Steel (No paint) |
4. Design & Manufacturing Standards
| Item | Standard |
|---|---|
| Design & Manufacture | API 6D, API 608, ISO 17292 |
| Face-to-Face | ASME B16.10, EN 558 |
| Flange Dimensions | ASME B16.5, EN 1092-1 |
| Pressure Testing | API 598, ISO 5208 |
| Fire Safe Design | API 607 / API 6FA (Optional) |
| Anti-Static Device | Yes (Standard) |
5. Key Features of Stainless Steel Construction
-
Superior Corrosion Resistance: The CF8M (316 SS) construction contains molybdenum, providing excellent resistance to chloride pitting and crevice corrosion. This makes it ideal for seawater and marine applications.
-
Trunnion Mounted Design: The ball is anchored by upper and lower stems, absorbing line pressure thrust. This reduces operating torque and ensures stable sealing performance even at high differential pressures (DN350).
-
Bolted Body Construction: Allows for easy inline maintenance and replacement of internal components (ball, seat, stem) without removing the entire valve from the pipeline.
-
Worm Gear Operator: Provides smooth, effortless operation and precise throttling for large-diameter valves. The handwheel is clearly marked with the gear ratio (e.g., “150:1”).
-
Anti-Blowout Stem: Prevents accidental stem ejection under pressure.
-
Fire-Safe & Anti-Static: Graphite seals and anti-static devices ensure safety in flammable media and prevent static electricity buildup.
6. Dimensional Data (Reference for DN350 PN25)
Note: Exact dimensions depend on the specific flange standard (ASME vs. EN) and face-to-face standard (API 6D vs. EN 558).
| Symbol | Description | Reference Value (mm) |
|---|---|---|
| DN | Nominal Diameter | 350 |
| L | Face-to-Face Length | ~762 (API 6D Short) / ~850 (Long) |
| D | Flange Outer Diameter | ~505 (PN25) |
| D1 | Bolt Circle Diameter | ~460 (PN25) |
| n-φ | Number of Bolt Holes | 12 |
| H | Height (Center to Top) | ~450 – 550 |
| W | Handwheel Diameter | ~400 |
7. Typical Applications
-
Seawater & Desalination: High resistance to chloride corrosion.
-
Chemical & Petrochemical: Handling aggressive acids, alkalis, and solvents.
-
Offshore & Marine: Ballast water systems, firewater mains, and process lines.
-
Power Plants: Cooling water and high-purity steam lines.
-
Pharmaceutical & Food: Hygienic and corrosion-free fluid handling.
Factory Markings Verified on Body:
SAVVY (Manufacturer) | DN350 (Size) | 25 (Pressure) | CF8M (316 Stainless Steel) | LBBE (Model Code)
