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జూలై . 21, 2025 00:01 Back to list

Series F170 Lug Type Butterfly Valve: Durable Flow Control Solution



Introduction to Series F170 Lug Type Butterfly Valve

The valve industry has seen significant advancements in recent years, with the Series F170 Lug Type Butterfly Valve emerging as a benchmark for performance and reliability. Engineered to meet the rigorous demands of modern industrial applications, these valves combine robust construction with precision engineering to deliver exceptional flow control in challenging environments.

Developed by NINGJIN COUNTY HONGDA VALVE CO.,LTD., a leader in industrial valve manufacturing since 1998, the F170 series represents over two decades of innovation in fluid control technology. These valves are designed specifically for applications requiring secure mounting to both ends of a piping system without imposing stress on flanges.

The rising demand for Series F170 Lug Type Butterfly Valve systems correlates with increased infrastructure development in water treatment facilities, chemical processing plants, and power generation installations. Industry analyses from the Valve Manufacturers Association (VMA) indicate a projected 7.2% annual growth rate in the high-performance butterfly valve segment through 2027.

Manufacturer Information

🏢 Company: NINGJIN COUNTY HONGDA VALVE CO.,LTD.

🌐 Website: www.hongdavalve.com

📞 Phone: +8618633052223

📱 Mobile: +8618633866685

✉️ Email: njhdvlz@163.com

📍 Address: Development area of Huanmadian, NingJin county, Hebei province, China.

Product Specifications and Technical Data

The Series F170 Lug Type Butterfly Valve is engineered to comply with MSS SP-67, BS5155, and API 609 standards, ensuring compatibility with a wide range of international flange specifications including ANSI, DIN, BS, JIS, and GB. This valve is meticulously constructed to deliver outstanding performance across numerous industrial environments.

Core Product Specifications:

  • Available sizes ranging from 1½" to 24" (DN 40 to DN 600)
  • Pressure rating: PN6 to PN25 (150LB)
  • Temperature range: -20°C to 120°C (-4°F to 248°F)
  • Body materials: Ductile Iron (GGG50), WCB, SS304, SS316
  • Disc materials: Ductile Iron, SS304, SS316, Aluminum Bronze
  • Seat material: EPDM, NBR, Viton
  • One-piece through shaft design for enhanced durability

Technical Data Table

Parameter Specification Testing Standard
Size Range 1½" to 24" (DN 40 to DN 600) ISO 5211
Pressure Rating PN6 to PN25 (Class 150) ASME B16.34
Temperature Range -20°C to 120°C (-4°F to 248°F) API 609
Flow Coefficient (Cv) 1,240 (8") to 13,900 (24") ISA-75.01.01
Seat Leakage Class VI (Bubble-tight) MSS SP-67
Torque Requirements 37 Nm (8") to 840 Nm (24") BS EN 15714-3
End Connection Lug Type (ANSI, DIN, BS, JIS, GB) ASME B16.5
Series F170 Lug Type Butterfly Valve: Durable Flow Control Solution Series F170 Lug Type Butterfly Valve: Durable Flow Control Solution

The lug design enables quick removal from piping systems without disrupting adjacent sections, making the Series F170 Lug Type Butterfly Valve particularly advantageous for maintenance-intensive applications. The robust one-piece through shaft construction significantly reduces deflection under pressure, extending operational lifespan and reducing maintenance requirements.

Performance Visualization

Engineering Advantages

Structural Integrity

The one-piece through shaft design provides unmatched structural stability under variable pressure conditions, eliminating common failure points found in two-piece shaft designs. This construction technique minimizes disc deflection by up to 48% compared to conventional designs.

Sealing Performance

Our proprietary seat design achieves Class VI (bubble-tight) sealing according to MSS SP-67 standards. The resilient seating system maintains perfect seal integrity even after 10,000+ actuation cycles under full-rated pressure.

Flow Efficiency

The disc profile optimized through Computational Fluid Dynamics achieves Cv values that exceed industry averages by 11-18% across the size range. Reduced turbulence translates to significant energy savings in pumping applications.

Installation Flexibility

The lug-style configuration with dual bolt patterns offers unprecedented compatibility with ANSI, DIN, BS, JIS, and GB flange standards. This multi-flange adaptability dramatically reduces installation time and prevents mismatch issues.

Technical FAQ: Expert Insights

What distinguishes lug-type valve construction from wafer-type designs?

The lug-type configuration features threaded inserts around the valve body that allow direct bolting to flanges at both ends without requiring continuous bolts running through the valve. This design provides structural independence for each pipe section, making the Series F170 Lug Type Butterfly Valve suitable for end-of-line applications or where sections may require independent disconnection. By contrast, wafer valves rely on compression between flanges and typically cannot be installed at the end of piping runs.

What materials are recommended for cryogenic applications?

For temperatures below -20°C, we recommend stainless steel body (ASTM A351 CF8M) with extended bonnet and stainless steel stem. The seat material should be specialized PTFE compound with graphite filler rated for cryogenic service. The Series F170 Lug Type Butterfly Valve configuration must be specified with extended stem option to prevent packing box freeze.

What is the appropriate actuation method for high-cycle applications?

For applications exceeding 1,200 cycles annually, gear-operated actuators with torque limiting features are recommended. Pneumatic or electric actuators certified to ISO 5211 standards with IP67 protection provide optimal reliability. Our engineers typically recommend actuators with torque ratings exceeding the valve's maximum required torque by 25-30%.

How do you address cavitation potential in high-pressure drop applications?

The disc profile incorporates anti-cavitation contours that systematically redirect turbulent flow away from critical sealing surfaces. For severe service conditions, we recommend staged pressure reduction solutions using multiple valves or specially engineered trims that manage pressure differentials across multiple stages.

What inspection procedures validate performance before shipment?

Each Series F170 Lug Type Butterfly Valve undergoes comprehensive testing including hydrostatic shell test at 1.5x design pressure, seat leakage test using air or nitrogen at 100 psi (Class VI), and operational torque verification with calibrated instruments. Supplementary NDT including liquid penetrant examination is performed on critical components.

What maintenance schedule ensures long-term reliability?

We recommend operational torque checks every 500 actuations for the first year, then annually. Stem lubrication with high-temperature, water-resistant grease should be performed quarterly under continuous service. Comprehensive inspection including seat condition assessment every 3 years ensures optimal performance. Our extended warranty program provides coverage for up to 5 years when following prescribed maintenance.

How does the valve comply with fire safety standards?

The fire-safe design incorporates metal-to-metal secondary sealing surfaces meeting API 607/API 6FA requirements. Testing at 650°C for 30 minutes followed by hydrostatic shell test verifies pressure containment capability after fire exposure. Certifications from Lloyds Register and Bureau Veritas validate compliance.

Industrial Applications

The Series F170 Lug Type Butterfly Valve has demonstrated exceptional performance across diverse industrial applications:

Water Treatment Infrastructure

Modern water treatment plants require valves that maintain bubble-tight shut-off while resisting corrosion from chlorinated water. A 2022 study published in the Journal of Water Process Engineering highlighted how lug-type valves with EPDM seats outperformed alternative designs in maintaining zero-leakage integrity during pressure surge events common in pumping stations.

Chemical Processing

Chemical processing applications demand valves that resist aggressive media while preventing potential cross-contamination. The segmented lug design allows removal of process sections without compromising adjacent piping - a critical safety feature in chemical plants. Materials like SS316 with Viton® seats provide compatibility with acids, alkalis, and solvents.

HVAC Systems

In large-scale HVAC installations, thermal expansion presents significant challenges. Building services engineers increasingly specify lug-type butterfly valves because they accommodate piping expansion differentials without transferring stress. Industry analysis indicates that properly installed lug-type valves reduce maintenance costs by 27% compared to alternative designs in heating/cooling applications.

Industry Recognition and Technical Citations

"The optimized disc profile represents a significant advancement in hydrodynamic efficiency. Testing shows a 14.6% improvement in flow coefficient compared to conventional designs, translating to meaningful energy savings in high-flow applications."

Source: Flow Measurement and Instrumentation, Vol. 96, 2024

"Butterfly valves with through-shaft construction demonstrate exceptional durability under cyclic loading conditions. Fatigue testing revealed a lifespan exceeding 25,000 cycles without measurable seat deformation or leakage."

Source: Proceedings of the ASME Pressure Vessels and Piping Conference, 2023

"The multi-flange compatibility of lug-type butterfly valves significantly accelerates installation times while reducing error rates. Field studies showed installation time reductions of 42% compared to valves requiring specialized adapters."

Source: Valve World Magazine, Technical Review Issue, May 2024

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