Full Bore Straight Through Diaphragm Valve
For demanding industrial applications requiring minimal pressure drop and unimpeded flow, a full-bore valve design is essential. Our engineered Straight Pattern Diaphragm Valve provides a direct, linear flow path, eliminating the turbulence and pressure losses associated with traditional weir-type designs. This configuration is particularly crucial for handling viscous fluids, slurries, or media containing suspended solids where clogging is a concern. The Straight Through Diaphragm Valve construction ensures the diaphragm retracts fully into the bonnet, creating a smooth, uninterrupted bore that matches the pipeline diameter. This feature guarantees true Unobstructed Flow Diaphragm Valve performance, enabling efficient pigging for cleaning and inspection while maintaining superior hygiene standards critical in sanitary processing.
The Full Bore Straight Through Diaphragm Valve represents a pinnacle of flow efficiency and isolation technology. Its defining characteristic is the full-port design, where the internal diameter of the valve body is consistent with the connecting pipeline, allowing for a smooth, laminar flow with negligible resistance. The actuation mechanism smoothly lifts the flexible diaphragm completely away from the flow stream, creating a perfectly clear passage. This design not only maximizes flow capacity (Cv value) but also prevents media entrapment within the valve body, making it exceptionally easy to clean and sterilize. The diaphragm itself serves as a robust barrier, isolating the process fluid from the bonnet and actuator mechanism, which prevents contamination and protects internal components from corrosive or abrasive media. This combination of features makes it an indispensable component in industries where flow integrity, cleanliness, and reliable shut-off are non-negotiable.
Key Technical Parameters & Specifications:
- Design Standard: ASME B16.34, ISO 5208
- Pressure Rating: Class 150 (PN16) to Class 300 (PN40)
- Temperature Range: -20°C to +140°C (standard diaphragm), extended ranges available
- Flow Characteristic: Essentially linear with near-equal percentage
- Leakage Rate: Bubble-tight shutoff (ANSI/FCI 70-2 Class VI)
- End Connections: Flanged (RF, RTJ), Threaded (NPT, BSP), Tri-clamp, Butt-weld
- Actuation Options: Manual handwheel, Pneumatic, Electric, Hydraulic
| Body Material | Diaphragm Material | Lining Material (Optional) | Typical Application Suitability |
|---|---|---|---|
| Cast Iron (GG25) | EPDM, NBR | N/A | General water, neutral fluids |
| Ductile Iron (GGG40) | FKM (Viton®), PTFE | N/A | Aggressive chemicals, oils |
| Stainless Steel (CF8/316) | PTFE, EPDM, FKM | N/A | Food & Beverage, Pharma, Corrosive media |
| Carbon Steel (WCB) | NBR, EPDM | Rubber, PTFE | Slurries, Abrasive media, Mining |
| PVC, CPVC, PP | EPDM, FKM | N/A | Highly corrosive acids, alkalis |
Standard Features & Options:
- Full bore design for maximum Cv and piggability
- Diaphragm with fail-safe design (spring-return actuators available)
- Position indicator for visual open/closed status
- Anti-static device (if required by ATEX/IECEx)
- Fire-safe design compliant to API 607 / API 6FA (on request)
- Sanitary finishes (Ra ≤ 0.8 µm) for aseptic processes
- Limit switches and solenoid valves for automated systems
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