7월 . 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 Rating	PN6, PN10, PN16, PN25, Class 150, 300	ISO 5208 / ANSI B16.1
Operation	Lever, Gear, Pneumatic, Electric Actuated	EN 12266, ISO 5211
Body Material	Cast Iron, Ductile Iron, Carbon Steel, SS304/316, Alloy Steel	ASTM/EN Specs
Disc Material	Stainless Steel, Aluminum Bronze, Ductile Iron Epoxy	ASTM A351, A216
Liner/Seat	EPDM, NBR, PTFE, Metal	FDA/ISO 4633
Coating	Fusion Bonded Epoxy, Polyurethane, Zinc-rich Primer	ISO 8179, AWWA C550
Face-to-Face	ISO 5752 Series 13/14, EN 558-1	ISO/EN
Flange Drilling	ANSI, DIN, BS, JIS Compatible	ISO 7005/EN 1092
Leakage Class	Class 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.

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

Over 18 years of manufacturing experience — Hongda Valve (www.hongdavalve.com)
Member of Valve World and registered with EUROPAGES supplier database
Certifications: ISO 9001:2015, API 609, CE, WRAS
Referenced by: AUMA Actuators, Flow Control Network

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.

7월 . 29, 2025 14:20 Back to list

Double Flanged Short Pattern Butterfly Valve for Reliable Flow Control

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