1. Technical Specifications Matrix
Parameter / Component | Industrial Standard & Material Options |
Brand / Manufacturer | SDF |
Valve Type | Wafer Type Butterfly Valve (Centric / Concentric Design) |
Actuation Mode | Pneumatic Actuation (Double Acting or Spring Return / Fail-Safe) |
Design Standards | API 609, ASME B16.34, ISO 5752, EN 593 |
Size Range | DN40 to DN600 / 1.5" to 24" (Larger sizes available upon request) |
Pressure Ratings | ASME Class 150 / PN10 / PN16 / JIS 10K |
Body Material Options | Stainless Steel (SS304, SS316, SS316L) / Ductile Iron with Epoxy Coating |
Disc & Lining Material | Fully Encapsulated PTFE / TFM1600 / PFA (High Corrosion Resistance) |
Applicable Media | Corrosive Acids, Alkalis, Gas, Potable Water, Oil, Slurry |
Temperature Profile | Depending on lining material selection |
Accessory Options | Limit Switch Box, Solenoid Valve (5/2 or 3/2-way), Electro-Pneumatic Positioner (4-20mA), Air Filter Regulator |
Flange Accommodations | Universal Multi-Standard Drilling (ANSI/ASME B16.5, DIN PN10/16, JIS) |
2. Key Engineering Features & Core Advantages
Ultimate Corrosion Isolation (PTFE-Lined Matrix): The defining characteristic of this SDF butterfly valve is its heavy-duty PTFE lining that fully shrouds the inner body cavity and the perimeter of the stainless steel disc. This absolute barrier prevents aggressive chemical media from contacting the structural metal body, effectively eliminating the risk of stress corrosion cracking (SCC) and localized pitting in chemical loops.
High-Torque, Fast-Acting Pneumatic Actuation: The anodized aluminum rack-and-pinion actuator delivers a linear, optimized torque curve perfectly matched to the valve’s breakthrough friction profile. Engineered for industrial automation, the actuator provides smooth 90-degree rotation within seconds, enabling seamless integration into distributed control systems (DCS) and safety instrumented systems (SIS).
Bi-Directional Bubble-Tight Shutoff: The concentric disc design maintains uniform, continuous $360^\circ$ contact with the resilient PTFE seat. This structural configuration ensures standard-compliant, bubble-tight zero leakage in both flow directions, serving as a reliable bi-directional sealing boundary even under volatile differential pressure conditions.
Low Pressure Drop and Streamlined Flow Geometry: The thin-profile, precision-polished disc minimizes fluid resistance when fully open. This aerodynamic optimization reduces localized turbulence and cavitation, maintaining a high flow coefficient ($C_v$) and lowering the overall energy footprint of pipeline transfer pumps.
Maintenance-Free Self-Lubricating Stem Packing: The valve features a multi-tiered stem sealing arrangement utilizing self-lubricating V-ring PTFE packings and secondary O-rings. This engineering approach eliminates lateral stem deflection and guarantees long-term atmospheric sealing integrity, preventing fugitive emissions without requiring constant packing gland adjustments.
3. Target Industry & Field Applications
The SDF automated pneumatic butterfly valve series provides robust process control across highly diverse sectors where media purity and chemical inertness are critical:
Chemical Processing & Specialty Refining: Safe management of aggressive process chemicals, highly concentrated acids (sulfuric, hydrochloric), alkalis, and reactive solvents.
Industrial Water Treatment & Desalination: Frontline automation for reverse osmosis (RO) membrane arrays, brackish water intake lines, brine concentration loops, and municipal wastewater treatment.
The Energy & Power Sector: Handling cooling water loops, scrubber systems, automated flue gas desulfurization (FGD) setups, and auxiliary utility lines.
Pharmaceutical & Food Processing: Utilizing USP Class VI compliant PTFE liners for bulk chemical formulation, clean utility piping, and sanitary washdown systems.
4. Quality Assurance & Pre-Shipment Compliance Testing
Operating as a critical automated terminal within industrial plants, every SDF pneumatic butterfly valve undergoes rigid production-floor inspection and validation protocols:
Dual Hydrostatic & Pneumatic Shell Test: Valve structures are pressure-tested up to design rating to guarantee absolute material soundness under mechanical strain.
API 598 Seat Leakage Verification: Seat assemblies undergo rigorous low-pressure pneumatic and high-pressure liquid checks to certify true zero-leakage shutoff.
Actuator Dynamic Calibration: The fully assembled valve-actuator package undergoes cyclic stroke testing to verify proper limit switch signaling, smooth alignment, and precise positional accuracy before factory packing.
FAQ
1.When can I get a quotation?
We typically provide a quotation within 4 hours of receiving your inquiry. Urgent requests are given priority.
2.Do you support customized valves?
Yes. We support OEM and customized valves according to drawings, specifications, and special working conditions.
3.What is the production lead time?
Normally, production can be completed within 15 working days after order confirmation, depending on product type and quantity.
4.What standards do your valves comply with?
Our products comply with GB, ANSI, API, JIS, DIN, BS, and other international standards.
5.What pressure, size, and temperature ranges can you supply?
Pressure: Class 150-3500 Size: DN10-DN3000 Temperature: -196ºC to 610ºC
6.What certifications do you have?
We are certified with ISO 9001, CE, and provide third-party inspection and test reports upon request.
7.What delivery and payment terms do you offer?
Delivery terms: EXW, FOB, CFR, CIF
Payment terms: T/T (30% deposit + 70% balance), L/C, and other terms by agreement.
8.Do you provide technical support and spare parts?
Yes. We offer 24/7 technical support and supply spare and consumable parts for long-term service.
