635 635 5505If you buy valves for a chemical plant in Bharuch, a water network in Gandhinagar or a process line in Vadodara, you will see “ISO” on almost every datasheet. Many buyers still ask which ISO standard actually applies to a butterfly valve. The answer is that no single document covers everything. A small family of ISO standards works together, and knowing them helps you compare quotes, avoid fitment problems and get the right valve the first time.
The Short Answer: ISO 10631 and Its Supporting Standards
The main product standard is ISO 10631, which covers metallic butterfly valves for general purposes. It sets out design, pressure and temperature requirements, materials, testing and marking for the valve itself.
Other ISO standards cover dimensions, actuator mounting and testing. A compliant valve usually refers to several of them:
| Standard | What It Covers |
| ISO 10631 | Metallic butterfly valves for general purposes |
| ISO 5752 | Face-to-face and centre-to-face dimensions of flanged valves, so valves fit pipeline gaps |
| ISO 5211 | Actuator mounting flange dimensions, important for gearboxes and automation |
| ISO 5208 | Pressure testing of metallic valves, including leakage rate classes |
| ISO 5209 | Marking of general purpose industrial valves |
| ISO 15848-1 | Fugitive emission measurement, where applicable |
Related standards such as EN 593 and API 609 are also widely used in India. Always confirm which standards a specific valve model is built and tested to on its datasheet, because they differ between sizes, pressure classes and designs.
Why ISO Compliance Matters When You Buy
A butterfly valve looks simple: a disc rotating on a shaft inside a pipe. In practice, small mismatches cause expensive problems.
- Interchangeability:ISO 5752 dimensions mean a replacement valve fits the existing pipe gap without cutting or re-fabrication.
- Automation readiness:ISO 5211 makes sure your actuator or gearbox bolts directly onto the valve top flange.
- Leakage assurance:ISO 5208 testing gives a measurable benchmark for shut-off performance.
- Traceability:ISO 5209 marking shows size, pressure rating and material at a glance, which helps during audits and maintenance.
For plants in Gujarat’s pharma, chemical and power sectors, these points translate into less downtime and easier spares planning.
How ISO Standards Apply to KSB and Flowserve Audco Butterfly Valves
Global Fluidtech Systems is an authorised dealer for both KSB and Flowserve. Both brands are known for engineered flow control products.
The KSB industrial butterfly valve range is designed for efficient flow regulation in pipelines. Depending on the application, buyers commonly look at:
- KSB wafer butterfly valve:compact and lightweight, clamped between two pipe flanges. It suits water, HVAC and general industrial service.
- KSB centered disc butterfly valve:a concentric design with a resilient seat, widely used for water, wastewater and mild process fluids.
- KSB stainless steel butterfly valve:chosen where corrosion resistance matters, such as food, pharma and chemical lines.
On the Flowserve side, the Flowserve Audco butterfly valve range serves demanding process and utility lines. Audco is a long-established valve name in India, and the Flowserve category also includes the Flowserve ball valve, the Audco plug valve and the Automax actuator for automation.
Our team can share the Flowserve butterfly valves catalogue and datasheets that list the exact standards for each model, so you can verify compliance before ordering.
Choosing the Right Butterfly Valve Type
The standard tells you how a valve is built. Your process decides which valve to build around. Consider these types:
- Wafer type:lowest cost and weight, but it cannot be used as an end-of-line valve.
- Lug type:threaded lugs allow dead-end service and removal of downstream piping.
- Flanged type:suited to larger diameters and higher-load installations.
- Concentric (centered disc):economical, ideal for water and low-pressure service.
- Eccentric (double offset and above):reduced seat wear and tighter shut-off for higher pressures and temperatures.
For quick shut-off in smaller lines, a KSB ball valve may be the better choice. If you are unsure, our engineers can compare options for your medium and pressure.
A Pre-Order Checklist for Plant Engineers
Before you raise a purchase order, confirm the following:
- Fluid, concentration and temperature range
- Operating and test pressure (PN or Class rating)
- Size (DN) and end connection: wafer, lug or flanged
- Body, disc, seat and shaft material
- Required leakage class under ISO 5208
- Actuator type and ISO 5211 flange size, if automated
- Required certificates, such as material test certificates and inspection reports
Sharing this list with your supplier removes guesswork and speeds up the quotation.
Butterfly Valve Supply Across Gujarat
Industrial demand in the state is spread across many districts. Global Fluidtech Systems, based in Navrangpura, Ahmedabad, supplies EPIROC, HUSQVARNA, KSB pumps, Flowserve and Flowlink products to Ahmedabad, Gandhinagar, Mehsana, Anand, Kheda, Vadodara, Bharuch, Surat, Valsad, Navsari, Rajkot, Morbi, Jamnagar, Junagadh, Bhavnagar, Kutch and other areas. That includes Amreli, Aravalli, Banaskantha, Botad, Chhota Udaipur, Dahod, Dang, Devbhoomi Dwarka, Gir Somnath, Mahisagar, Narmada, Panchmahal, Patan, Porbandar, Sabarkantha, Surendranagar and Tapi.
Whether you run a pharma unit near Ahmedabad, a ceramic plant in Morbi or a refinery-linked facility in Jamnagar, local availability of valves, actuators and spares reduces your lead time. Our wider offering of KSB valves and Flowlink valves and strainers lets you source more of your flow control package from one supplier. You can also read how authorised distributors support Gujarat’s industrial corridor.
Final Thoughts
The ISO standard for butterfly valves is best understood as a set: ISO 10631 for the valve, ISO 5752 for dimensions, ISO 5211 for actuator mounting and ISO 5208 for testing. Matching your requirement to these standards, and choosing a trusted KSB or Flowserve Audco model, protects your plant from fitment issues, leakage and avoidable shutdowns.
Need help selecting the right valve? Contact Global Fluidtech Systems for datasheets, pricing and delivery anywhere in Gujarat.
FAQs
1. What is the ISO standard for butterfly valves?
ISO 10631 is the main standard for metallic butterfly valves for general purposes. It works alongside ISO 5752 (dimensions), ISO 5211 (actuator mounting), ISO 5208 (pressure testing) and ISO 5209 (marking).
2. Which ISO standard gives the face-to-face dimensions of butterfly valves?
ISO 5752 specifies face-to-face and centre-to-face dimensions for flanged valves, so a valve can be replaced without changing the pipework.
3. What does ISO 5211 mean for a butterfly valve?
ISO 5211 defines the top flange dimensions used to mount actuators and gearboxes, so a manual lever can be upgraded to an automated actuator without a custom bracket.
4. What is the difference between a wafer and a lug butterfly valve?
A wafer valve sits between two flanges and is held by the flange bolts. A lug valve has threaded lugs, so one side of the pipeline can be removed while the valve stays in place, and it can be used for dead-end service.
5. Which KSB butterfly valve types are available in Gujarat?
Global Fluidtech Systems supplies KSB industrial butterfly valves, including wafer, centered disc and stainless steel options, depending on your application and project requirement.
6. Are Flowserve Audco butterfly valves available in Ahmedabad?
Yes. Global Fluidtech Systems is an authorised Flowserve distributor in Ahmedabad and supplies Audco butterfly, ball and plug valves across Gujarat.
7. Do you supply butterfly valves outside Ahmedabad?
Yes. We serve Gandhinagar, Vadodara, Surat, Bharuch, Rajkot, Morbi, Jamnagar, Kutch and the other districts across Gujarat.
