API 6D / API 608 Soft-Seated Ball Valve - High Platform
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Stainless Steel Knife Gate Valve — DN50–DN1200
FULL BORE · BI-DIRECTIONAL · ISO 5996 CERTIFIED · WENZHOU FACTORY
BAUTU stainless steel knife gate valves are engineered for reliable on/off isolation of slurries, pulp, wastewater, and viscous media. Built with a full-bore, bi-directional seat design, our valves deliver zero dead zone flow and minimal pressure drop — ideal for demanding applications in mining, pulp & paper, water treatment, and chemical processing.
| ISO 5996 / EN 13397 / AWWA C520 | |
|---|---|
| Pressure Rating | PN6 / PN10 / PN16 (Class 150) |
| Size Range | DN50 – DN1200 (2″ – 48″) |
| Body Material | SS304 / SS316 / SS316L |
| Gate Material | Stainless Steel with Hardened Edge |
| Actuation | Handwheel / Electric / Pneumatic |
| End Connection | Lug / Wafer / Flanged |
| Temperature Range | -20°C to +200°C |
| Standard | ISO 5996 / EN 13397 / AWWA C520 |
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— Full Specifications
API 6D / API 608 Soft-Seated Ball Valve - High Platform - Parameter Table
| PARAMETER | SPECIFICATION |
|---|---|
| Standard | API 6D / API 608 / ASME B16.34 |
| Model | GQ41F-150LB |
| Size Range | NPS 1/2" – 4" (DN15 – DN100) |
| Body Material | WCB (ASTM A216) / CF8 (ASTM A351 304SS) / CF8M (316SS) |
| Ball Material | SS304 / SS316 (Mirror Polished Ra ≤ 0.4μm) |
| Seat Material | PTFE / RPTFE (Soft Seat – Zero Leakage) |
| Platform Type | High Platform – ISO 5211 Direct Actuator Mounting Pad |
| Fire Safe Design | API 607 / API 6FA Compliant |
| Leakage Class | Zero Leakage – API 598 Class VI |
| Temperature Range | -29°C ~ +180°C |
Our Production Process
1. Casting
2. Machining
3. Testing
4. Loading
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· Product documentation
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This Product Spec Sheet
Single-page datasheet for API 6D / API 608 Soft-Seated Ball
Valve – High Platform
- Full parameter table
- Dimensional drawing
- Materials & standards list
- Ordering code guide
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— WHY bAUTU
Why Specify This Valve from Bautu
ISO 5211 Direct-Mount — No Bracket Required
Eliminates bracket fabrication and field alignment errors. Reduces installation time by 40% and shrinks the actuator stem stack, minimizing fugitive emissions through the stem seal.
100% Factory Pressure Tested — Per API 598
Every valve undergoes individual shell, seat, and backseat testing. Class VI bubble-tight verification with factory test certificate supplied per order.
— FAQ
Frequently Asked Questions
What does "soft seated" mean, and what are its advantages?
Soft seated means the valve seat is made from PTFE or RPTFE polymer material, rather than metal. This design achieves zero-leakage shutoff, requires lower operating torque, and delivers longer service life. It is ideal for clean media including water, natural gas, oil, and process chemicals that do not contain abrasive particles.
What does "High Platform" mean on this valve?
"High Platform" refers to an elevated actuator mounting pad conforming to ISO 5211. The raised flange provides additional vertical clearance above the pipeline, accommodating larger, heavier actuators — including gearboxes, handwheels, and high-torque pneumatic or electric units (Rotork, Bettis, AUMA, Bray). It is the preferred design for insulated pipelines where extra clearance above the insulation layer is required, and for applications demanding large multi-turn or heavy-duty actuators.
What is the lead time, and can you accommodate custom specifications?
Standard sizes (NPS ½" to 8", Class 150 / 300) are available in 4–6 weeks. Custom alloys, actuated packages, or witness inspection orders typically require 8–12 weeks. OEM private labeling and ITP documentation are available for EPC projects. Contact our team for a formal quotation.
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