High Performance Stainless Steel Butterfly Valve

High Performance Stainless Steel Butterfly Valve — Technical Data Sheet

1. Product Overview

This high performance stainless steel butterfly valve adopts a double-offset or triple-offsetdesign. The body and principal internals are manufactured from stainless steel (standard material: ASTM A351 CF8M / 316 SS). It is designed for critical isolation and control applications in the oil & gas, petrochemical, chemical, power generation, marine, and water treatment industries. The valve offers bidirectional tight shut-off, low operating torque, extended service life, and superior corrosion resistance. Fire-safe, anti-static, and low fugitive emission designs are available as options.

Typical Service Media: Water, steam, oil, natural gas, chemicals, sour media containing H₂S, and cryogenic fluids.

2. Applicable Standards & Codes

3. Technical Specifications

4. Materials of Construction

Note: For sour service (H₂S-containing media), all pressure-containing and pressure-controlling components shall comply with NACE MR0175 / ISO 15156.

5. Design Features

• Double-Offset / Triple-Offset Geometry: The sealing surfaces disengage without friction, resulting in low torque and extended service life. Triple-offset design achieves metal-to-metal zero leakage.
• Bidirectional Sealing: The valve provides tight shut-off in both flow directions; either no preferred flow direction or a clearly marked preferred direction.
• Fire-Safe Design: Certified to API 607 / API 6FA upon request. The primary soft seat is backed by a secondary metal seat that ensures reliable shut-off during and after a fire.
• Blow-out Proof Stem: The stem is internally inserted with an integral shoulder, preventing ejection under line pressure.
• Anti-Static Device: Electrical continuity is maintained between the disc, stem, and body to prevent static buildup.
• Low Fugitive Emissions: Stem sealing is designed to meet ISO 15848-1 Class B or TA-Luft requirements. Optional dynamic seal monitoring ports are available.
• In-Line Maintainability: Certain designs allow replacement of the seat and sealing elements without removing the valve from the pipeline (side-entry construction).
• Self-Lubricating Bearings: Upper and lower stem bearings utilize metal-backed self-lubricating materials, reducing operating torque and eliminating the need for routine maintenance.

6. Testing & Inspection

All valves are tested in accordance with API 598 or ISO 5208 prior to shipment.

Hold Time: Shell test minimum 15 seconds (extended for large sizes); seat test minimum 15 seconds.

7. Operation & Actuation

Mounting Standard: ISO 5211 top flange, enabling direct coupling with any compatible actuator. A universal mounting bracket is provided.

8. Certification & Documentation

• Material test certificates with full traceability (EN 10204 Type 3.1)
• Factory acceptance test reports (shell and seat test)
• API 607 / API 6FA fire-safe type approval certificate (where applicable)
• NACE MR0175 material compliance statement
• Fugitive emission type approval (ISO 15848-1)
• Declaration of conformity
• Installation, Operation & Maintenance Manual (IOM)

Optional Third-Party Inspection: Lloyd’s Register (LR), DNV, ABS, CCS, Bureau Veritas (BV), etc.

9. Installation & Service Recommendations

• Valve Installation: Wafer and lug types are installed between mating flanges. Follow any flow direction markings; double-offset designs may feature a preferred flow direction for optimal sealing.
• Flange Bolting: Tighten bolts evenly in a cross-pattern to prevent body distortion that could compromise seat sealing.
• Routine Inspection: Periodically check packing for leakage; adjust gland or replace packing as required.
• Spare Parts Kit: It is recommended to maintain a spare set consisting of seat ring, packing, and bearings for quick field repair.
• Storage: Store in a dry, ventilated area with the disc slightly open (approx. 5–10°) to prevent permanent deformation of the seat.

10. Remarks

This technical data sheet outlines the general specifications for a high performance stainless steel butterfly valve. Final configuration, specific materials, actuator sizing, pressure-temperature ratings, and any supplementary testing shall be subject to the project-specific purchase specification and data sheet. The manufacturer shall submit detailed drawings and calculations for approval after order confirmation.

GUATANTEE:

SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.