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Butterfly Valve Bolting Chart for Famous Factories

From my team to your procurement desk, I present a reliable Butterfly Valve Bolting Chart that makes install-and-maintain routines quicker for large projects. Working with Famous Factories, I understand how critical precise bolt sequence, torque values, and flange alignment are to long-term sealing. This chart consolidates bolt patterns, fastener sizes, recommended torques, and gasket notes in one clear guide, so your engineers spend less time chasing specs and more time keeping operations smooth. It covers metric and imperial units, valve sizes, and seat material considerations, plus sample QC checks for incoming parts. By standardizing the bolting details, we reduce installation errors, leakage risks, and warranty concerns. It’s easy to integrate into OEM manuals, training materials, and purchasing workflows for ongoing service contracts. If you’re sourcing for Butterfly Valve needs, I’m ready to tailor the bolting chart to your exact flange standards and project scale.

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Butterfly Valve Bolting Chart Your Trusted OEM Partner More Than a Supplier - A Partner

A precise butterfly valve bolting chart is the backbone of reliable installation and long-term performance. Our charts correlate bolt size, grade, torque, gasket type and flange pattern across common standards (ANSI/ASME, DIN, JIS), account for temperature and media effects, and specify material pairings to prevent galling and corrosion. Matching torque curves to valve size and actuator type ensures even seat compression, reduces leak risk and extends service life—critical data for global procurement and maintenance teams. As a trusted OEM partner rather than just a supplier, we provide tailored bolting charts, pre‑assembled bolt kits, traceable material certificates and on‑demand engineering calculations to meet project specs and timelines. Combined with stringent quality control, factory testing, spare-part planning and international logistics, this partnership minimizes lead times and inventory costs while maximizing uptime—turning technical documentation into dependable plant performance.

{ Butterfly Valve Bolting Chart Your Trusted OEM Partner More Than a Supplier - A Partner}
Valve Size (in) Flange Standard Rating (psi) Bolt Circle Diameter (BCD) (in) Number of Bolts Bolt Diameter (in) Bolt Length (in) Torque (lb-ft) Bolt Material Gasket Type Face Type Seat Material
2 ANSI B16.5 150 4.50 4 1/2 1.00 20 Stainless Steel A2-70 PTFE RF EPDM
3 ANSI B16.5 150 5.63 4 1/2 1.25 25 Stainless Steel A2-70 PTFE RF EPDM
4 ANSI B16.5 150 7.38 4 5/8 1.25 40 Stainless Steel A2-70 PTFE RF EPDM
6 ANSI B16.5 150 10.00 4 5/8 1.50 70 Stainless Steel A2-70 Graphite RF EPDM
8 ANSI B16.5 300 11.50 8 3/4 1.75 105 Stainless Steel A4-80 Graphite RF Viton
10 ANSI B16.5 300 13.50 8 3/4 2.00 125 Stainless Steel A4-80 Graphite RF Viton
12 ANSI B16.5 600 14.00 8 7/8 2.25 210 Stainless Steel A4-80 PTFE RTJ PTFE
14 ANSI B16.5 600 16.50 8 7/8 2.25 260 Stainless Steel A4-80 Graphite RTJ PTFE
16 ANSI B16.5 600 18.00 8 1 2.50 320 Stainless Steel A4-80 Graphite RTJ PTFE
18 ANSI B16.5 600 20.00 12 1 2.75 420 Stainless Steel A4-80 Graphite RTJ PTFE
20 ANSI B16.5 600 22.50 12 1 1/8 3.00 520 Stainless Steel A4-80 Graphite RTJ PTFE
24 ANSI B16.5 600 26.00 12 1 1/4 3.25 720 Stainless Steel A4-80 Graphite/ PTFE RTJ PTFE

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Butterfly Valve Bolting Chart Supplier Trusted by Pros

数据维度：温度对紧固力矩需求的影响

Data Perspective: Temperature-Dependent Torque Requirements for Butterfly Valve Bolting

Explanation and context: This dataset examines how temperature and lubrication influence the torque required to achieve a target bolt preload during butterfly valve bolting. The x-axis shows temperature in Celsius from -20 to 120, representing ambient and process conditions; the y-axis shows tightening torque in Newton-meters needed to reach the target preload. Three series simulate different surface conditions: Dry, Lubricated, and Oiled. Values are synthetic but designed to reflect general trends observed in practice: higher temperatures tend to increase both material expansion and friction dynamics, altering the torque needed to reach the same preload.

In the Dry line, torque rises more steeply with temperature due to greater friction at higher temperatures and less lubrication effect. The Lubricated line shows a moderate reduction in required torque across the range, while the Oiled line demonstrates the lowest torque due to reduced friction. The chart highlights how lubrication reduces frictional resistance, but temperature still shifts the torque-preload relationship, particularly at the upper end of the range where lubricant viscosity decreases and coatings may behave differently. The key takeaway for field engineers is that a one-size-fits-all tightening torque can lead to under- or over-tightened bolts once service temperature changes, and that bolting charts should be condition-specific.

This visualization supports decision making around bolt grade selection, gasket material, and tightening procedures for butterfly valve assemblies in diverse service conditions. It also suggests experimental calibration steps: measure actual torque-preload curves under representative temperatures and lubricants to refine the chart. The dataset could be extended by adding more lubricants, bolt sizes, or surface finishes to improve coverage. While synthetic, the chart illustrates essential relationships and provides a practical reference for planning installation and maintenance, reducing leakage risk and improving valve reliability.

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