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Jul . 29, 2025 14:20 Back to list

Double Flanged Short Pattern Butterfly Valve for Reliable Flow Control



Double Flanged Short Pattern Butterfly Valve: Specification, Industry Trends, and Application Guide

The double flanged short pattern butterfly valve (double flanged short pattern butterfly valve) is becoming the gold standard for fluid control in industries like petrochemical, water treatment, metallurgy, and power generation. This comprehensive guide explores this critical valve’s technicalities, industry adoption, manufacturing process, and how it compares to other double flanged butterfly valves.

Double Flanged Short Pattern Butterfly Valve for Reliable Flow Control
High-performance double flanged short pattern butterfly valve for industrial fluid applications
1. Rising Demand: Industry Trends & Market Overview

Global demand for double flanged butterfly valves is projected to exceed $3.41 billion by 2028, with a CAGR of 6.2% (ResearchAndMarkets, 2024). Short pattern variants are gaining traction due to space-saving installation, robust corrosion resistance, and reduced maintenance. Standards like ISO 5752 for face-to-face dimensions and ANSI/ASME B16.5 for flange compatibility dominate procurement specifications worldwide.
Key Growth Sectors: Urban waterworks, chemical plants, steel mills, offshore facilities, power plants.

Top Related Variants: Double flanged butterfly valve, butterfly valve double flange, butterfly double flange, butterfly valve double flange type, double flange type butterfly valve, double flange valve
2. Technical Parameters: Understanding Double Flanged Short Pattern Butterfly Valve
Typical Technical Parameters
Parameter Specification (Double Flanged Short Type) Industry Standard
Nominal Size (DN)DN50 ~ DN2000 ISO 5752 / EN 558
Pressure RatingPN6, PN10, PN16, PN25, Class 150, 300ISO 5208 / ANSI B16.1
OperationLever, Gear, Pneumatic, Electric ActuatedEN 12266, ISO 5211
Body MaterialCast Iron, Ductile Iron, Carbon Steel, SS304/316, Alloy SteelASTM/EN Specs
Disc MaterialStainless Steel, Aluminum Bronze, Ductile Iron EpoxyASTM A351, A216
Liner/SeatEPDM, NBR, PTFE, MetalFDA/ISO 4633
Coating Fusion Bonded Epoxy, Polyurethane, Zinc-rich Primer ISO 8179, AWWA C550
Face-to-FaceISO 5752 Series 13/14, EN 558-1ISO/EN
Flange DrillingANSI, DIN, BS, JIS CompatibleISO 7005/EN 1092
Leakage ClassClass A (bubble tight), EN 12266-1 ISO 5208
All valves 100% hydro-tested in compliance with ISO 5208, with additional factory certifications (WRAS, CE, API 609, PED).
3. Manufacturing Process: From Raw Material to Reliable Operation
Production Flow Diagram
1. Raw Material Selection →
2. Foundry Casting / Forging →
3. CNC Machining →
4. Surface Treatment & Coating →
5. Component Assembly →
6. Hydraulic & Leakage Test →
7. Marking & Packing
  • Material Traceability: All metallic components sourced as per ASTM/EN, traceable heat numbers, ensuring durability and corrosion-resistance.
  • Casting/ Forging: Body and disc made via advanced foundry, eliminating porosity and defects; NDT (non-destructive testing) performed on every batch.
  • CNC Machining: Valve faces, flange drilling, and stem bores are CNC machined for ±0.02mm tolerance, ensuring perfect alignment and torque transfer.
  • Coating: Fusion bonded epoxy coating to 250μm, complying with ISO 8179, ensures long-term anticorrosion for water, wastewater, and chemical service.
  • Assembly: All elastomeric seats and bearings assembled in cleanroom; stainless steel fasteners and self-lubricating bushings.
  • Testing: Valves 100% hydro-tested at 1.5x design pressure; leakage per EN 12266-A (Class A: zero visible leakage).
Key Certifications: ISO 9001:2015, CE, WRAS (potable water), API 609, Bureau Veritas for marine, PED for EU.
Key Material Grades:
Body: GGG50/Ductile iron, ASTM A216 WCB (carbon steel), ASTM A351 CF8/CF8M (stainless steel)
Disc: A351 CF8/CF8M, Al-Bronze
Shaft: SS410 / SS420 / SS316
Seat: EPDM/NBR/PTFE (for chemical resistance, up to 150℃), Metal seats (for abrasion)
4. Technical Features & Application Advantages
  • Compact Build, High Strength: Short pattern reduces weight (typically by 12–22%), eases installation in limited space.
  • Bidirectional Bubble Tight Shutoff: Achieves Class A leak-free performance, even after 10,000+ cycles. (Tested per EN 12266, <0.1 ml/min leakage rate.)
  • Full Bore & Low Pressure Drop: Slim disc profile ensures Cv values up to 80% higher than wafer types of similar size.
  • Ease of Maintenance: Top-mounted stem and removable seat design; in-line repairability for <2-hour seat replacement.
  • Corrosion-proof Construction: Dual epoxy/polyurethane coatings (tested for 600+ hours salt-spray per ASTM B117).
  • Adaptability: Suitable for hydrant lines, chemical pipelines, desalination, HVAC, and high-purity water.
  • Precision Engineering: Computer-aided CFD design for minimal turbulence, certified by TÜV Rheinland audits.
Double Flanged Short Pattern Butterfly Valve for Reliable Flow Control
Section of butterfly valve double flange demonstrating robust disc and torque transmission.
5. Data Visualization: Performance & Market Trends
6. Product Specification & Competitor Comparison
Double Flanged Short Pattern Butterfly Valve Standard Double Flanged Valve Wafer Butterfly Valve
Face-to-Face Dimension Short (ISO 5752-13/14) 82–325mm Long (ISO 5752-1/2) 130–400mm Ultra short, but no flange
Pressure Rating PN6–PN25, 150# PN6–PN40, 150#/300# Usually PN6–PN16
Disc/Body Materials DI / Carbon Steel / SS / Al-Bronze DI / SS / CS / Exotic DI, PVC, SS
Installation Flexibility Excellent (direct between flanges, no gasket shift) Good, more space needed Limited (no direct flange mounting)
Maintenance Easy (top entry/seat replaceable) More complex/disassembly needed Limited (seat non-replaceable)
Bore Diameter Utilization Up to 96% ~90% ~85%
Corrosion Performance Epoxy/Polyurethane, up to 600h salt-spray Similar PVC/limited
Price/Value Moderate, cost-effective Higher CapEx Lowest, but less robust
Certifications ISO, WRAS, CE, API, PED Similar Limited
7. Customization, Lead Time & Quality Assurance
Wide Customization Range:
  • Sizes from DN50 up to DN2000 with customized flange drilling (ANSI, DIN, JIS, BS standards available)
  • Material upgrades for aggressive media (duplex stainless, alloy, bronze, EPDM/PTFE seats for acids/bio)
  • Special coatings (nano-polymer, high-temp) for refinery, fire-safe for power plants
  • Actuation: Manual, worm gear, pneumatic, electric, with options for remote diagnostics and feedback
  • Laser-engraved tagging, anti-static devices, and locking mechanisms on request
Delivery Time:
Standard sizes/ratings: 2–3 weeks EXW (AQL stock); Large sizes/custom: 4–8 weeks after engineering approval.
Warranty: 18–24 months from shipment date, or 12 months from installation, whichever first.
After-Sales Support: 24/7 technical hotline, free on-site installation guidance (selected regions), spare parts availability up to 10 years after purchase, ISO 9001 documented service procedures.
Major Clients: Sinopec, Veolia, SABIC, Tata Steel, China Resources Power, SUEZ, and more.
8. Application Scenarios & Case Studies
  • Desalination Plant, Middle East: 250+ butterfly valve double flange units (DN400–DN1200) operate under 52℃ ambient and high chloride content. No leakage observed after 24 months (Super duplex disc, PTFE seat).
  • Metallurgy/Steel Works, India: Upgraded to short pattern for the primary cooling circuit—less downtime during seat changeover, average flow drop reduced by 22%.
  • City Water Project, Germany: Dual-certified (WRAS + DVGW) double flange type butterfly valve with FBE coating, verified by TÜV.
  • Pumping Station, Brazil: 72 pieces DN800–DN1600 valves: gear operated, full bidirectional seals—no visible corrosion after 1400h in salt mist chamber (ISO 8179 compliance).
  • Chemical Plant, China: Specially lined with PTFE for 40% NaCl brine, zero polymerization after 18 months.
End-user feedback: “Compared to our previous flange valve, lining changes take less than 1 hour, downtime is reduced, and torque effort is noticeably less.” — Zhejiang Jinshan Water Co., 2023
9. Double Flanged Short Pattern Butterfly Valve FAQ
1. What is the main difference between double flanged short pattern butterfly valve and standard double flange type?
The short pattern valve has a reduced face-to-face length (ISO 5752 Series 13/14), making it ideal for retrofitting or space-constrained installations. Standard types are longer (Series 1/2), often with higher pressure ratings but require more space.
2. Which materials are most common for disc and body construction?
The body is often ductile iron or carbon steel (GGG50, WCB), while discs are stainless steel (CF8/CF8M), aluminum bronze for seawater, or epoxy-coated ductile iron. Selection depends on fluid and corrosion requirements.
3. What certifications are typically required?
Key certifications: ISO 9001, CE, API 609, WRAS (potable water), PED, EN 593 (Europe), Bureau Veritas (marine), and others for local market compliance.
4. Can double flanged short pattern valves be automated?
Yes, per ISO 5211, top flange allows direct mounting of pneumatic or electric actuators. Remote control, signal feedback, and failsafe return can be integrated per project requirements.
5. What about pressure ratings and leakage class?
Standard ratings include PN10, PN16, PN25, ANSI 150#. Leakage class is A (zero leakage) per EN 12266-1 and ISO 5208, ensuring reliable shutoff for waterworks and process lines.
6. How is corrosion protection ensured?
All wetted surfaces receive dual epoxy or polyurethane coating (>250μm, ISO 8179/AWWA C550 standard). For aggressive media, PTFE lining or hard-coat anodizing can be specified.
7. What are the typical installation standards?
Face-to-face follows ISO 5752/EN 558-1, flange drilling per ISO 7005, EN 1092, or ANSI B16.5. Installation in horizontal or vertical pipes is possible using industry-compliant bolts and gaskets.
10. Authoritativeness & References
For technical references and in-depth discussions, visit these leading forums and journals:
Ready to optimize your project? Visit the official double flanged short pattern butterfly valve product page for datasheets, quotes, or expert advice.

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