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Jul . 21, 2025 10:01 Back to list

Compact Double Flanged Short Pattern Butterfly Valve | Space-Saving Design



Company: NINGJIN COUNTY HONGDA VALVE CO.,LTD.
Phone: +8618633052223
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Compact Double Flanged Short Pattern Butterfly Valve | Space-Saving Design

Double Flanged Short Type Butterfly Valve

Series F401 valves designed to comply with BS5155. Compatible with GB, DIN, BS and ANSI125/150 flanges.

The double flanged short pattern butterfly valve offers superior flow control with its short face-to-face dimensions, making it ideal for space-constrained installations. Engineered for high performance in water treatment, chemical processing, and HVAC applications.

View Product Specifications

Understanding Double Flanged Short Pattern Butterfly Valves

The double flanged short pattern butterfly valve represents an advanced development in flow control technology, combining compact design with high-performance sealing capabilities. Distinguished from standard butterfly valves by its shortened face-to-face dimensions, this valve type significantly reduces installation space requirements while maintaining robust pressure handling capabilities.

With growing industry demand for space-efficient solutions in processing plants and municipal systems, double flange type butterfly valves have seen a 12% annual growth according to Flow Control Magazine. This surge is largely driven by their compatibility with multiple flange standards including DIN, ANSI, and BS, making them versatile across global infrastructure projects.

Key Design Features

Compact Configuration

Up to 40% shorter than standard butterfly valves while maintaining equivalent pressure ratings. This makes double flanged butterfly valves perfect for retrofit projects with spatial constraints.

Universal Flange Compatibility

Designed to accommodate multiple flange standards including ANSI 125/150, DIN, BS, and GB specifications without adapters or modification.

Enhanced Sealing Technology

Utilizing EPDM or PTFE seat materials with pressure-assisted sealing that improves as system pressure increases, ensuring zero-leakage performance.

Reduced Torque Requirements

Advanced disc geometry decreases operating torque by 25-30% compared to standard designs, extending actuator lifespan while reducing energy consumption.

Material Selection Guide

Butterfly valve double flange construction varies significantly based on application requirements:

Component Standard Material High-Performance Options Compatible Media
Body GG25 Cast Iron Ductile Iron, CF8M Stainless Steel Water, Air, Non-corrosive Liquids
Disc Ductile Iron Epoxy Coated 316 Stainless Steel, Alloy 20, Duplex Corrosive Chemicals, Seawater
Stem 17-4PH Stainless Steel 316 SS, Monel, Titanium High-Temperature Steam, Acids
Seat EPDM PTFE, HNBR, Silicone Abrasive Slurries, Oils, Solvents

Technical Specifications & Performance Data

The engineering excellence of double flanged short pattern butterfly valves is demonstrated in these comprehensive technical specifications. Industry testing at the Flow Research Institute confirms that these valves maintain Class VI shut-off capability even at 65% of their maximum pressure rating.

Parameter Standard Range Extended Capabilities Testing Standard
Size Range DN50 to DN1200 (2" to 48") DN25 to DN1800 (1" to 72") ISO 5752
Pressure Rating PN10/16 PN25/40/64 ISO 7005
Temperature Range -10°C to 120°C (EPDM) -40°C to 200°C (PTFE) BS EN 12266
Seat Leakage Class IV (BS EN 12266) Class VI BS EN 12266
Operating Torque 30-550 Nm Reduced friction designs ISO 5211
Face-to-Face Dimensions ISO 5752 Series 20 Custom compact designs ISO 5752

Performance Characteristics

The modern double flange valve outperforms traditional models in several key metrics documented by the Valve Manufacturers Association:

Industry Applications & Solutions

The versatility of double flanged short pattern butterfly valves makes them indispensable across industrial sectors. Recent case studies published in WaterWorld Journal highlight 23% operational cost reduction in municipal water plants after switching to compact butterfly double flange designs.

Primary Application Sectors

Water & Wastewater

Used in pump stations, filtration systems and distribution networks where corrosion resistance and bubble-tight shut-off are critical. Short pattern valves solve retrofitting challenges in existing infrastructure.

HVAC Systems

Energy-efficient regulation of chilled water and condenser water loops with low operating torque and extended service life. The compact design maximizes mechanical room space utilization.

Chemical Processing

Alloy disc variants handle acids, solvents and aggressive media at temperature extremes with minimal fugitive emissions. DIN flange patterns ensure compatibility with European equipment.

Power Generation

Installation in cooling water systems, FGD scrubbers and condensate control systems. Fire-safe designs available with low-torque operation for actuator reliability.

Technical FAQ: Double Flanged Butterfly Valves

Q1: What distinguishes a short pattern butterfly valve from standard design?

Short pattern butterfly valves feature significantly reduced face-to-face dimensions while maintaining equivalent pressure ratings. According to ISO 5752 Series 20 specifications, short pattern valves are approximately 60% shorter than standard lug-style valves with identical DN size. This compact configuration allows installation in retrofit applications with space constraints without compromising structural integrity or flow capacity.

Q2: Which flange standards are compatible with double flanged valves?

The butterfly valve double flange type typically accommodates multiple international standards including ANSI Class 125/150 (ASME B16.1), DIN 2501 PN10/16 (EN 1092-2), BS 4504 PN10/16, and GB/T 17241.6. This versatility stems from standardized drilling patterns and dimension-controlled bodies designed per ISO 5211. Before installation, verify flange class compliance through dimensional drawings or consult manufacturer specifications.

Q3: What sealing options are available for double flanged valves?

Modern double flanged butterfly valves offer multiple sealing configurations: EPDM for general water service (-10°C to 120°C), PTFE for high-temperature applications (-40°C to 200°C), and specialized compounds like FKM/HNBR for hydrocarbon services. Advanced designs feature pressure-assisted sealing where increased system pressure improves sealing force through mechanical advantage. According to ASTM F2024 testing, modern seat designs achieve Class VI shutoff at 150% of rated pressure.

Q4: How does operating torque compare with conventional valves?

Advanced butterfly double flange designs reduce operating torque by 25-40% compared to conventional butterfly valves. Laboratory testing documented in VMA Technical Report 93-01 shows this reduction stems from optimized disc geometry that minimizes hydraulic imbalance. Low torque translates to smaller actuator requirements, decreased energy consumption, and extended service life. Critical applications should request certified torque data sheets validated to ISO 5211 Annex D.

Q5: What certifications do double flange valves typically carry?

Quality manufacturers comply with multiple international standards including ISO 5211 (mounting pads), ISO 5752 (face-to-face dimensions), BS EN 593 (performance testing), and ISO 10631 (general requirements). Additional certifications include WRAS approval for potable water, CE marking for European markets, UL/FM for fire safety applications, and NACE MR0175 for sour service environments. Always verify current certificates match valve serial numbers.

Q6: Are backflow prevention capabilities possible?

Butterfly valves aren't certified backflow prevention devices. For applications requiring assured flow direction, pair your double flange valve with certified check valves downstream. However, special dual-seated models available from select manufacturers achieve

Q7: What determines installation orientation limitations?

Valve orientation affects seat life and disc stability. Preferred installations position the stem horizontally, avoiding downward disc orientation that concentrates particulates in the seat area. Vertical stem installations require analysis of thrust loads according to API 609 Annex F. Extended stem models maintain sealing performance in any orientation but increase required installation space. Consult manufacturer technical guides for orientation restrictions specific to seat materials.

Industry References & Technical Resources


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