High Performance Stainless Steel Butterfly Valve

Design & Manufacturing API 609, ISO 17292, ASME B16.34, EN 593
Pressure-Temperature Ratings ASME B16.34 or EN 12516
Inspection & Testing API 598, ISO 5208, EN 12266
End Connections (Wafer/Lug) ASME B16.5 / B16.47; Double Flanged: ASME B16.5 (short pattern)
Face-to-Face Dimensions API 609 Table 2 (or ISO 5752 Short Pattern)
Fire-Safe API 607 / API 6FA
Sour Service Materials NACE MR0175 / ISO 15156
Fugitive Emissions ISO 15848-1 or TA-Luft
Top Flange / Actuator Mounting ISO 5211

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High Performance Stainless Steel Butterfly Valve — Technical Data Sheet

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.

Applicable Standards & Codes

Item	Standard / Code
Design & Manufacturing	API 609, ISO 17292, ASME B16.34, EN 593
Pressure-Temperature Ratings	ASME B16.34 or EN 12516
Inspection & Testing	API 598, ISO 5208, EN 12266
End Connections (Wafer/Lug)	ASME B16.5 / B16.47; Double Flanged: ASME B16.5 (short pattern)
Face-to-Face Dimensions	API 609 Table 2 (or ISO 5752 Short Pattern)
Fire-Safe	API 607 / API 6FA
Sour Service Materials	NACE MR0175 / ISO 15156
Fugitive Emissions	ISO 15848-1 or TA-Luft
Top Flange / Actuator Mounting	ISO 5211

Technical Specifications

매개변수	사양
밸브 유형	High Performance Double-Offset / Triple-Offset Butterfly Valve
공칭 크기	DN 50 – DN 1200 (2″ – 48″); larger sizes upon request
Pressure Class	ASME Class 150 / 300 / 600 (or PN 16 / 40 / 64 / 100)
온도 범위	-196°C to +550°C, depending on seat and seal material selection
누설 등급	Bidirectional zero leakage (metal-seated: ANSI/FCI 70-2 Class V / VI)
End Connections	Wafer, Lug, Double Flanged
대면	In accordance with API 609 Short Pattern, or EN 558 Series 20 / 25
Top Flange	ISO 5211 with mounting bracket

Materials of Construction

요소	Standard Material (Stainless Steel)	Optional Materials
몸	ASTM A351 CF8M (316 SS)	A351 CF8 (304 SS), CF3M, Duplex SS (4A/5A), Inconel 625
디스크	ASTM A351 CF8M (316 SS)	Duplex SS (UNS S31803), Monel, Inconel 625 overlay or solid
줄기	ASTM A564 Type 630 (17-4PH SS)	Duplex SS, Inconel 625, Monel K-500
Seat / Seal Ring	PTFE, Reinforced PTFE (RTFE)	Graphite-filled PTFE, Devlon, Metal laminate / Inconel 718 + Graphite, Stellite hardfacing
Packing	PTFE braided / molded, Graphite	FFKM (Kalrez), Mica/Graphite combination (for high-temperature / fire-safe)
Bearings	PTFE-lined + 304 SS	Graphite-impregnated bronze, Inconel

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

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.

Testing & Inspection

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

Test Item	Test Pressure / Criteria	Acceptance Standard
Shell Hydrostatic Test	1.5 × Rated Pressure	No visible leakage; no structural damage
Seat Leakage Test	1.1 × Rated Pressure (bidirectional)	Zero leakage or as per ISO 5208 Rate A
Low-Pressure Seat Test (optional)	0.6 MPa (6 bar) air or nitrogen	Zero bubble leakage
Fire Test (optional)	Per API 607 / API 6FA protocol	Satisfactory seal integrity after test
Fugitive Emission Test (optional)	Per ISO 15848-2	Leakage rate ≤ Class B
NDE (Non-Destructive Examination)	RT / PT / MT per ASME B16.34 supplementary requirements	Conform to relevant standards

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

Operation & Actuation

Operation Mode	설명
Manual – Lever / Handwheel	Standard for sizes up to DN 200, with position indicator and lockout device
Manual – Gear Operator	For large sizes or high-pressure applications, manual operation
Pneumatic Actuator	Double-acting or spring-return, 1.5× safety factor; can be equipped with solenoid valves and limit switches
Electric Actuator	Multi-turn or part-turn, available with 4–20 mA control and SIL capability
Hydraulic Actuator	For ultra-high pressure or subsea applications

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

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.

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.

비고

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.

보증:

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