Series DOBF

Series DOBF

Vahn-Tech Series DOBF is a cost-effective butterfly valve solution for isolation valve applications. Providing lighter weight, smaller face-to-face, and simple quarter-turn rotary movement, a double-offset butterfly valve design is a great solution for zero-leakage isolation relative to ball valves for large sizes. With the eccentric disc designed to reduce the rubbing of the seat it drastically reduces torque requirements for actuation while extending seat life expectancy.

Brand: Vahn-Tech
Category: Double Offset
Valve Size 2" to 72"
Pressure Class Standard ASME B16.34
Pressure Class Range 150, 300, 600
Body Wafer, Double Flange
End Connections Lugged, Integral Flange, Flangeless
Face-to-Face Standard API 609
Bonnet Body Integral
Packing Stuffing Box, Fugitive Emissions (ISO 15848), Live-Loaded, Fire-Safe
Configuration Double-Offset
Trim Eccentric Disc
Trim Characteristics Quick-Opening
Seating Soft & Metal-to-Metal
Shut-Off Classification API 598

Contact free sealing between seat and disc during open / close or interim positions

No abrasion point either on the upper or lower parts of seat as well

Lower Torque Values resulting in low torque gear operators or actuators

Seat shape specially designed with unique dynamic load PTFE seal providing good elasticity and high reliability

Sealing can be maintained without the need of adding O-Ring or metal backing ring

The lip type sealing structure can compensate for the changes of temperature and pressure during operation

Bi-directional bubble-tight leakage to API 598 or ISO 5208

Superior flow characteristic in throttling applications with linear flow characteristic curve

Stem shaft is designed with anti-blowout structure to prevent stem injection in case of pressure surge

Design Standards ASME B16.34: Governs design, material selection, and pressure-temperature ratings for valves.
ASME B16.10: Specifies face-to-face dimensions of flanged valves to ensure compatibility during installation.
ASME B16.5: Governs flange connections, ensuring proper pressure rating and connection integrity.
API 608: Standard for ball valve design, covering durability and operational performance.
ISO 10497: International standard for fire testing of valves to prevent failure during fire conditions.
BS EN 1759-1: European standard for flange connections, particularly for Class 150 and 300 flanges.
Certifications API 607: Certification for fire-safe performance of valves, ensuring resistance during fires.
API 641: Ensures compliance with fugitive emissions standards for environmental protection.
EN 15848: Certifies valve performance in controlling fugitive emissions, which is critical for environmental safety.
NACE MR0175: Ensures material compatibility in sour gas environments, preventing corrosion and degradation.
PED: Pressure Equipment Directive compliance for the safe operation of valves under high pressure in the EU.
SIL 3 Capable: Safety Integrity Level certification indicates high safety-critical systems reliability.
UL, FM: Certifies safety and performance of valves, especially in industrial and commercial systems.
CRN
Quality ISO 9001: International quality management standard ensuring consistent product quality and continuous improvement.
API 598: Standard for valve pressure testing, ensuring leak detection and operational integrity.
MSS SP-55: Establishes surface quality standards for valve castings, ensuring high-quality manufacturing.
ISO 15848: Specifies testing and construction requirements to meet fugitive emissions standards for valve assemblies.

No manuals available at this time.