Product Overview
The SS304 stainless steel PTFE soft-sealed ST37.8 fully welded ball valve is an innovative valve that combines the corrosion resistance of stainless steel with the high strength of a fully welded structure. The valve body adopts a combined design of ST37.8 carbon steel and SS304 stainless steel internal components, and is equipped with PTFE soft seals. While ensuring pressure-bearing strength and economy, it provides excellent sealing performance and medium adaptability, making it an ideal choice for district heating, water supply and drainage, and industrial pipe networks.
Technical specifications
| Parameter category | technical specification |
| Valve body material | ST37.8 carbon steel (outer wall) + SS304 stainless steel (flow channel) |
| Pressure rating | PN16/25/40 (Class 150/300) |
| Temperature range | -29℃ to +160℃ |
| Connection method | Butt-weld end (BW) |
| Valve seat seal | reinforced PTFE (polytetrafluoroethylene) |
| Valve stem material | SS304 stainless steel |
| Spherical material | SS304 stainless steel |
| Valve body structure | fully welded structure |
| Design standard | ISO 17292 / API 6D |
| Fireproof design | API 607 is optional |
Product features
1. Composite valve body structure
High-strength pressure-bearing capacity: The ST37.8 carbon steel housing offers excellent mechanical strength and pressure-bearing capacity
Corrosion-resistant inner lining: SS304 stainless steel flow channel ensures the corrosion resistance of the medium contact surface
Economic optimization: While ensuring performance, it has a cost advantage over all-stainless steel valves
2. Fully welded valve body design
Zero external leakage: Eliminate potential leakage points at flange connections
Compact structure: Small in size, suitable for installation environments with limited space
Direct burial application: It can be directly buried underground without the need for additional valve well protection
3. PTFE soft sealing system
Bubble-level seal: Reaches ANSI B16.104 Class VI leakage level
Low operating torque: Small friction coefficient, easy to operate manually
Chemical stability: Resistant to corrosion by most chemical media
4. Special structural characteristics
Anti-blowout valve stem: Ensures safe operation under pressure
Anti-static design: A static electricity path is formed between the ball and the valve stem
Fireproof options: Optional fireproof design. A secondary seal is formed when the soft seal fails
Core parameters
Pressure rating: PN16/25/40 (Class 150/300)
Temperature range: -29℃ to +160℃
Connection method: Butt welding end
Valve seat material: Reinforced PTFE
Design standard: ISO 17292 / API 6D
Application field
District heating: primary pipeline network, heat exchange station, district control
Water supply and drainage systems: municipal water supply, building water supply, fire protection pipe networks
Industrial pipelines: circulating water, compressed air, process water
Direct burial project: Underground pipeline network that requires no maintenance
Summary
The SS304 stainless steel PTFE soft seal ST37.8 fully welded ball valve, through the perfect combination of innovative composite structure, full welding technology and high-quality sealing materials, provides industrial users with:
Outstanding cost performance: Optimizing costs while ensuring performance
Reliable sealing performance: PTFE soft sealing ensures zero leakage
Long service life: Designed service life of over 30 years
Convenient installation: The fully welded structure simplifies the installation process
This product is an ideal choice for balancing performance and cost in district heating, water supply and drainage, and industrial pipeline systems, providing reliable fluid control guarantees for modern pipeline network construction.
| Brand | DIDTEK |
| Structure | Ball |
| Valve Material | Didtek provide cast steel, stainless steel, special alloy, CI, DI etc |
| Valve Type | Didtek Produce Ball Valve |
| Valve Test | 100% quantity tested before delivery |
| Valve Guarantee | 18 months after shipments and 12 months after installed |
| Valve Structure | Ball Valve |
| Valve Delivery | 15 - 30 days |
| Valve Sample | Sample Available by Didtek Valve |
| Valve Color | Customer request |
| Valve Packing | Plywood Case for Ball Valve |
| MOQ | 1 Set |
| Valve Certificate | API6D/CE/ISO9001/ISO14001 |
| Place of Origin | Zhejiang, China (Mainland) |
| Delivery Detail: | Shipped in 15-30 days after payment |
| Port | Shanghai Or Ningbo |
| Payment Terms | L/C,D/A,D/P,T/T, Western Union |
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