Editorial Technical Reference

Butterfly Valve

This page explains how Butterfly Valve is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A quarter-turn valve with a rotating disc to regulate or isolate flow in pipelines, offering compact, lightweight, and cost-effective flow control.

Product Specifications

Technical details and manufacturing context for Butterfly Valve

Definition
Butterfly valves are widely used in water supply, wastewater treatment, HVAC, chemical processing, and food industries to control or isolate fluid flow. They are specified by nominal diameter, pressure rating, body material, disc material, seat material, and actuator type. Grades vary from economy versions for low-pressure water to high-performance triple-offset designs for high-temperature and high-pressure applications, with differences in sealing materials, trim, and manufacturing tolerances. This directory entry covers general parameters and standards for butterfly valves as a product category. The nominal diameter range is DN50 to DN1200 per ISO 5752, with pressure ratings from PN10 to PN25 per EN 593. Working temperature typically ranges from -20°C to +120°C, depending on seat material; PTFE seats allow up to 200°C. Leakage rate for soft-seated valves is Class VI per ISO 5208, while metal-seated versions may achieve Class IV. Flow coefficient (Kv) ranges from 50 to 12000 m³/h. Face-to-face dimensions follow ISO 5752 for short and long patterns. Disc thickness varies from 5 to 50 mm, and shaft diameter from 12 to 100 mm. Body surface finish is ≤6.3 μm Ra, with epoxy coating thickness of 150–300 μm per ISO 12944. Actuator mounting flanges comply with ISO 5211. Shell and seat test pressures are 1.5×PN and 1.1×PN respectively per EN 12266-1. Operating torque ranges from 10 to 5000 N·m, and life cycle from 10,000 to 50,000 cycles. Materials on file include WCB (ASTM A216), CF8 (SS304), CF8M (SS316), ductile iron (ASTM A536), and seats in EPDM, PTFE, or NBR. Relevant standards include ISO 5752, EN 593, API 609, GB/T 12238, and AWWA C504. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement.
Working Principle
The valve consists of a circular disc mounted on a rotating shaft. When the handle or actuator turns the shaft, the disc rotates 90 degrees to open or close the flow path. In the open position, the disc is parallel to the flow, minimizing pressure drop; in the closed position, it is perpendicular, sealing against a seat. The disc's rotation allows for precise throttling and quick shut-off.
Common Materials
WCB (ASTM A216), CF8 (SS304), CF8M (SS316), Ductile Iron (ASTM A536), EPDM (seat), PTFE (seat), NBR (seat)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Nominal DiameterDN50–DN600 mmCommon range for wafer and lug typesISO 6708
Operating Temperature-40–85 °CSeat material limits range
Leakage Rate0.01–0.1 %Class A for metal seat, Class B for soft seatISO 5208
Flow Coefficient50–5000 CvDepends on size and disc profileISO 5752
Face-to-Face Dimension43–267 mmShort pattern for wafer typeISO 5752
Disc MaterialCF8, CF8M, 316LCorrosion resistanceASTM A351
Seat MaterialEPDM, PTFE, NBRTemperature and chemical compatibilityASTM D2000
Actuation Torque10–500 N·mRequired for actuator sizingISO 5211
Weight2–150 kgWafer type lighter than lug
Enclosure ProtectionIP54–IP65For electric actuatorIEC 60529
Supply Voltage24 ±10% V DCFor electric actuatorIEC 60038

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Disc
    Rotates 90 degrees to open or seal the flow path.
  • Shaft
    Carries the disc and transmits the quarter-turn from the operator.
  • Seat
    Sealing ring the disc closes against.
  • Actuator Optional
    Turns the shaft where the valve is not hand-operated.
Technical documentation
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Manufacturing capability
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Inspection readiness
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Manufacturers of Butterfly Valve

13 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Donjoy Technology
Wenzhou, Zhejiang, CN

The official website lists sanitary butterfly valves. Specify medium, seal material, connection standard and manual or pneumatic operation, and check cleaning and temperature conditions for the specific model.

Listed on the company's own website · profile compiled by CNFX from public sources
View source page ↗ cndonjoy.com · recorded 2026-09-30
ZFA Valve
Tianjin, Tianjin, CN
Founded 2006
ISO9001 CE WRAS ISO14001 +2
Also makes: Gate/Valve, Pneumatic Actuator, Valve Actuator and 2 more
Managed by the manufacturer
Listed on the company's own website
Listed there as: “Double Eccentric Butterfly Valve”
View source page ↗ zfavalves.com · recorded 2026-08-21
BCST Group
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Pneumatic Butterfly Valve”
View source page ↗ bcstgroup.com · recorded 2026-08-22
Changzhou Ruide Drying
Jiangsu, CN
Founded 20155~50 staff3,000-5,000 square meters
ISO9001 CE
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Ribbon Mixer with Butterfly Valve”
View source page ↗ rddryer.com · recorded 2026-08-22
China Sanitary Valve
Zhejiang, CN
Founded 200251~100 staff5,000-10,000 square meters
ISO9001 ASME CE Test Report
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Sanitary Butterfly Valves”
View source page ↗ chinasanitaryvalve.com · recorded 2026-08-22
CHINA VIHUNG VALVE CO. LTD.
Shanghai, CN
Also makes: Knife Gate Valve, Check Valve, Gate Valve and 2 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “AWWA C504 EN558 Double Eccentric Butterfly Valve”
View source page ↗ vihung.com · recorded 2026-08-22
CJan Fluid Technology Co., Ltd.
Shanghai, CN
ISO 9001:2015 IATF 16949
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “What is Handle Butterfly Valve”
View source page ↗ cjanfluid.com · recorded 2026-08-22
Jianen Sanitary
Wenzhou, Zhejiang, CN
Founded 2009
3A CE ISO9001 SGS
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Sanitary Butterfly Valve”
View source page ↗ jianen-sanitary.com · recorded 2026-08-22
Landee Industries
Xiamen, Fujian, CN
Founded 1994230+ staff
ASME U-Stamp
Also makes: Heat Exchanger, Valve Actuator, Check Valves and 8 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Butterfly Valves”
View source page ↗ landee.cn · recorded 2026-08-22
Dandong Foundry (Liaoning Borui Machinery Co., Ltd)
Dandong, Liaoning, CN
ISO 9001
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Butterfly Valve Casting”
View source page ↗ iron-foundry.com · recorded 2026-08-26
SUNPASS SEALING TECHNOLOGY (ZHEJIANG) CO., LTD.
Zhejiang, CN
Also makes: Pressure Gauge
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Closure Plate for Butterfly Valve”
View source page ↗ sunpass.cn · recorded 2026-08-22
Sunthai Extractor
Zhejiang, CN
200-500 staff20,000 m²
ISO 9001:2015
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Sanitary Butterfly Valve”
View source page ↗ sunthaiextractor.com · recorded 2026-08-22
Wenzhou Deyi Machinery
Wenzhou, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “teflon lined butterfly valves”
View source page ↗ technologyvalve.com · recorded 2026-08-22
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Frequently Asked Questions

What are the typical pressure ratings for butterfly valves?

Typical pressure ratings range from PN10 to PN25 per EN 593. Higher ratings may be available for triple-offset designs, but always confirm with the manufacturer for specific models.

What seat materials are available?

Common seat materials include EPDM, PTFE, and NBR. The choice depends on the fluid, temperature, and pressure requirements. PTFE seats can handle up to 200°C.

How do I select the correct actuator for a butterfly valve?

Actuator selection is based on the required operating torque, which ranges from 10 to 5000 N·m depending on valve size and pressure. The mounting flange must comply with ISO 5211. Consult the manufacturer for torque calculations.

What standards apply to butterfly valves?

Relevant standards include ISO 5752 for face-to-face dimensions, EN 593 for design, API 609, GB/T 12238, and AWWA C504. Always verify compliance with the manufacturer.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Butterfly Valve.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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