Keywords: double flanged short pattern butterfly valve, double flanged butterfly valve, butterfly valve double flange, butterfly double flange, butterfly valve double flange type, double flange type butterfly valve, double flange valve
Product: Double Flanged Short Type Butterfly Valve
Official link: Official Product Page
1. Overview & Industry Trends
The double flanged short pattern butterfly valve is an advanced rotary valve engineered for efficient flow control in high-demand industrial pipelines.
With its distinct double flanged design and compact short pattern body, this valve stands out for its reliability in critical applications where installation space and fluid isolation are key.
Growing sectors—such as petrochemicals, pulp & paper, water treatment, and metallurgy—are rapidly integrating double flanged butterfly valves into their new and retrofit projects.
According to MarketsandMarkets, the global butterfly valve market exceeded USD $10 Billion in 2023, with the double flange type segment exhibiting a steady 6.4% CAGR.
Double Flanged Short Pattern Butterfly Valve — Durable Solution for Demanding Environments
2. Key Technical Parameters and International Standards
Parameter |
Specification (Double Flanged Short Type) |
Reference Standards |
Size Range |
DN50 – DN2000 (2" – 80") |
EN 558-1, ISO 5752 |
Pressure Rating |
PN10, PN16, PN25, Class150, Class300 |
EN 1092-2, ANSI B16.5 |
Body Material |
Ductile Iron, Carbon Steel, Stainless Steel |
ASTM A536, A216, A351 |
Disc Material |
CF8, CF8M, DI, Aluminum Bronze |
ASTM A351, ASTM B148 |
Seat Material |
EPDM, NBR, PTFE, FKM |
ISO 4633 |
Temperature Range |
-20°C to +150°C (depending on seat) |
Manufacturer test records |
Operation |
Manual, pneumatic, electric actuator |
ISO 5211 |
Testing |
Pressure, leak, shell tests |
EN 12266-1, API 598 |
The above parameters showcase how the double flanged short pattern butterfly valve aligns with top-tier industry standards, ensuring dependability across critical sectors.
3. Manufacturing Process Flowchart
1. Raw Material Selection
Certified Ductile Iron/Steel/SS, per ASTM/EN
→
2. Casting/Forging
Precision sand casting, heat treatment
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3. CNC Machining
Bore finishing, face milling, drilling
→
4. Surface Treatment
Epoxy coating, anti-corrosion lining
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5. Assembly
Disc, stem, seat installation; gasket placement
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6. Quality Inspection
EN/API/ISO leak, torque, & pressure tests
→
7. Packaging/Shipping
Crating & marking per customer/region
Material and Quality Highlights
- Corrosion resistance: Seats in PTFE/EPDM. Discs with electroless nickel or bronze overlays for seawater/chemical resistance.
- Machining precision: ±0.01 mm stem and disc tolerances for no-vibration operation.
- Testing: 100% shell & seat leak test under ISO, API598; typically 4 bar above rated pressure.
- Certification: Most leading factories (inc. Hongda Valve) obtain CE, ISO9001, WRAS, FM/UL (fire protection), and customizable ANSI/EN marking.
Double Flanged Butterfly Valve - Precision CNC Machining Stage
4. Application Scenarios and Industry Case Studies
Industry |
Key Benefits |
Typical Specification |
Water Supply/Treatment |
Low pressure loss, corrosion protection |
PN10/16, DI Body, EPDM seat |
Petrochemical |
Fast operation, high pressure/temperature |
CF8M disc, FKM seat, Fire safe |
Power Plants |
Steam handling, reliability |
CS body, PTFE/NBR seat, PN25 |
Mining & Metallurgy |
Abrasion resistance, large bore |
EN-GJS-400-15, custom disc, Class 150 |
HVAC/Building |
Quick shut-off, compact installation |
Short pattern, lever actuated |
Customer Case Excerpt:
“In our Saudi Arabian desalination plant, switching to double flanged short pattern butterfly valves resulted in 32% reduction in routine maintenance and 12% power savings on intake pumps, due to their streamlined bore and reliable sealing.”
– Plant Maintenance Engineer, Abqaiq, 2023
- OEM Partnerships: Used by Veolia, SUEZ, Sinopec, Ebara, etc.
- Service Life: >20,000 cycles (typical, per cycle testing labs)
- Retrofit: Compatible with ISO 5211 actuators for DCS/BMS upgrades
Comparative Technical Chart
5. Product Data Visualization
- Double Flanged Short Pattern Butterfly Valve offers superior sealing and support, making it suitable for higher pressure systems and aggressive fluids.
- Wafer and lug types, while cost-effective, lack the full double flanged sealing face, limiting their industrial applicability.
Life-cycle Performance Trend (Sampled Data)
Double Flanged Type Butterfly Valve - Full Face, Robust Flange
6. Manufacturer Comparison Table
Brand |
Country |
Certifications |
Max Size |
Body Material Options |
Warranty |
Hongda Valve (double flanged short pattern butterfly valve) |
China |
ISO, CE, WRAS, FM |
DN2000 |
DI, WCB, SS, Bronze |
24 months |
AVK |
Denmark |
ISO, WRAS, UL |
DN1200 |
DI, SS |
12-24 months |
KSB |
Germany |
ISO, TA-Luft, CE |
DN1000 |
DI, SS, Bronze |
18 months |
Watts |
USA |
FM, UL, NSF |
DN700 |
DI, SS |
12 months |
- Versatile material selection and largest range (up to DN2000), covering most major pipeline needs.
- Continuous third-party audits (SGS, BV, Lloyd’s) and batch traceability.
- Optimal for high-cycle, low-maintenance scenarios; tailored OEM/ODM available.
- In-house R&D—adapts seat/disc for specific media, such as seawater, acids, or fire protection.
7. Customization Solutions
Double Flanged Short Type Butterfly Valve can be customized per project:
- Body, disc, and seat materials tailored for your fluid: e.g. SS316L for saltwater, FKM/PTFE for aggressive chemicals, bronze discs for anti-seawater erosion.
- Custom drilling/joint facings to match legacy pipework (EN, ANSI, JIS, GOST).
- Specialized coatings: heavy-duty epoxy, FDA food-grade lining, or ceramic/hardfacing for abrasion.
- Actuation: fitter-ready for ISO 5211, double-acting pneumatic, electric, or hydraulic actuators, plus auxiliary & smart sensors.
- Testing protocols: from routine EN 12266 to ISO 15848 emission, WRAS potable water, or fire-safe standards per FM/UL.
Butterfly Valve Double Flange – Assembly Quality & Custom Fastener Adaptation
8. Typical Applications and Project References
Double flange valve installations are prevalent in major infrastructure and process industries:
- Municipal water distribution & treatment plants (contactless EPDM seat, 25-year average lifespan).
- Sinopec chemical plants, using fire-safe seat designs and automated operation.
- Suez/METITO water desalination, in saline conditions, using bronze discs and FKM seating.
- Power generation sites in Central Europe, with PTFE-seat, high-cycle variant (over 30k cycles/year with <1% leakage rate).
Sample Project Profiles
Project: Water Supply Network Renovation—Madrid, Spain
Scope: 180 sets DN600/25bar double flanged short pattern butterfly valve
Result: 99.9% operational reliability after 18 months; quarterly maintenance cost reduction by 21%.
Project: Offshore Oil Terminal Valve Upgrade—Tianjin, China
Scope: Customized Class 300, PTFE lined double flange type for brine/chemical loading arms.
Result: 100% zero visible corrosion after 1 year, remote-electro actuator integration with SCADA.
9. FAQs: Double Flanged Butterfly Valves
Frequently Asked Technical Questions
Q1: What’s the difference between ‘double flanged’ and ‘wafer’ butterfly valves?
A: Double flanged valves have full flanges at both ends for secure, leak-free bolted connections, supporting pipe loads and simplifying maintenance. ‘Wafer’ valves fit between flanges with minimum face-to-face length, and rely mainly on pipeline compression.
Q2: Which body/seat material should I choose for seawater or aggressive chemicals?
A: For seawater, bronze or SS316 body/disc with EPDM or FKM seat is recommended. For acids, go for PTFE-lined (fluoropolymer) seat and SS316/CF8M disc to maximize chemical resistance.
Q3: What international installation standards are supported?
A: Most double flange type butterfly valves comply with EN 1092-2 (Europe), ASME/ANSI B16.5 (USA), JIS (Japan), and GOST (CIS). Consult your supplier for drilling compatibility.
Q4: What is the typical face-to-face dimension of a double flanged short pattern butterfly valve?
A: According to EN 558-1 Series 13 (short pattern), e.g. for DN300: 102mm; for DN600: 140mm. Always check manufacturer datasheets.
Q5: Can I automate these valves?
A: Yes. Butterfly valve double flange types come with ISO 5211 mounting pads, ready for pneumatic, electric, or hydraulic actuators.
Q6: What about pressure testing and certification?
A: All reputable makers provide test certificates per EN 12266, API 598, with pressure test 1.1–1.5x of rated PN/class, and full documentation for WRAS, CE, or FM/UL if required.
Q7: Typical delivery time for custom double flanged short type butterfly valve orders?
A: Standard models: 7–15 working days (stocked). Custom: 3–5 weeks depending on material/configuration. Expediting and third-party inspection available.
10. Warranty Period, Quality Commitment and Customer Support
- Warranty: Hongda double flanged short pattern butterfly valves come with a standard 24-month warranty from shipment date. Extended coverage available.
- After-sales: Full technical documentation, on-site commissioning support, remote troubleshooting, with 24/7 email & hotline response.
- Quality Assurance: Batch & serial number traceability, 100% pressure/leak tests (certificate provided), compliance with ISO 9001 QA system.
- Consultation: Assistance with valve selection, material compatibility, actuator integration, and retrofit for legacy systems.
References & Further Reading