Butterfly Valve: Types, Working Principle & Why OSKO Valves Is Your Ideal Choice

1. What Is a Butterfly Valve?
A butterfly valve is a quarter-turn flow-control device featuring a rotating disc that regulates fluid flow within pipelines. When the handle or actuator turns the disc a quarter turn, it either allows or restricts flow. This simplicity provides swift operation, compact size, and lightweight design—key benefits in industrial applications.
________________________________________

2. Butterfly Valve Working Principle
The butterfly valve operates via a disc mounted on a stem, housed within the valve body. When the handle rotates 90°, the disc aligns parallel to the flow for full passage or perpendicular to seal the flow.
• Quarter-turn operation—fast opening/closing
• Sealing mechanisms: seats made of EPDM, Nitrile, Viton, or PTFE ensure tight shutoff
• Actuation options: manual, pneumatic, or electric with ISO 5211 mounting pads for easy automation
OSKO integrates top-tier sealing materials and precise ISO mounting flanges to ensure robust and leak-free performance under challenging conditions.
________________________________________

3. Types of Butterfly Valves by OSKO
OSKO Valves offers a complete suite of butterfly valves to accommodate varied industrial needs:

a. Aluminium Butterfly Valves
Ideal for light-weight applications, these valves have corrosion-resistant aluminium bodies and replaceable seats. Suitable for sizes up to 150 mm with PN10/PN16 ratings.

b. Wafer Type Butterfly Valves
Designed for clamping between two pipe flanges, these valves are compact and easy to maintain. Available in CI, SG, WCB, CF8/CF8M bodies from 40–600 mm. Seats are molded or replaceable, and full bore ensures high flow coefficient (Cv).

c. Lug Type Butterfly Valves
Engineered to function at pipeline ends (dead-end service), these valves come in CI, SG, WCB, CF8, CF8M bodies sized 40–600 mm. They support hand lever or gearbox operation and are ideal for dead-end isolation.

d. Double Flanged End Butterfly Valves
Featuring flanged connections, these valves offer a single-piece cast body, sizes 50–1,000 mm, with low torque and easy actuation via ISO 5211 flange.

e. Double Offset Butterfly Valves
For pressurized environments, these valves deliver low torque, easier seat replacement, and high-pressure tolerance with PTFE seats, available as wafer, lugged, or flanged, sized for manual, gear, pneumatic, or electric actuation.

f. Actuated Butterfly Valves
Available in pneumatic (single/double acting) and electric variants, with integrated local/remote controls, manual override, limit/tamper switches, torque switches, solenoid valves, and positioners

________________________________________

4. Key Technical Specifications
OSKO’s butterfly valves meet global standards:
• Design: API 609, IS 13095, BS 5155, AWWA C504
• Pressure ratings: PN10, PN16, ANSI 150
• Body materials: Cast Iron (CI), Ductile Iron (SG), WCB (Carbon Steel), CF8, CF8M, Aluminium
• Seat options: NBR, EPDM, Viton, Silicon, Hypalon, PTFE for diverse media and temperatures.
ISO 5211 mounting pads ensure easy adaptation to actuators, while testing adheres to API 598 and ISO 5208 standards. Disc and shaft materials include SS410, SS304, SS316, ensuring corrosion resistance and low torque.
________________________________________

5. Applications of Butterfly Valves
Butterfly valves from OSKO suit various industrial sectors:
• Water treatment & distribution: low-pressure drop and high flow capacity
• HVAC: light valves like aluminium types
• Oil & gas / petrochemicals: durable double offset types for high-pressure
• Chemical processing: materials like CF8M and PTFE seats resist corrosion
• Power generation & fire protection: reliable quick shut-off and low maintenance
LinkedIn posts and demonstrations highlight OSKO valves’ smooth operation and high performance across real industrial environments.
________________________________________

6. Benefits of Choosing Butterfly Valves
• Cost-effective: lighter and more compact than gate valves
• Minimal pressure drop: full bore design available in wafer and lug types
• Fast operation: quarter-turn mechanism
• Low maintenance: simple design with easily replaceable seats
• Flexible actuation: manual, pneumatic, or electric as needed
OSKO’s seat materials and ISO mounting flange ensure valves stay functional in tough environments with easy cleaning and actuation.
________________________________________

7. Why OSKO Valves Stands Out
✅ Proven Heritage & Expertise
Established in 1989 and based in Rajkot, Gujarat, OSKO Valves has over 30 years of valve manufacturing excellence with CNC and VMC machinery and comprehensive quality control labs
✅ Quality at Its Core
OSKO’s motto “Quality at It’s Core” reflects their unyielding standards. They are certified to meet API, IS, BS, and AWWA norms, with rigorous pressure testing to ensure reliability
✅ Customer-Centric & Transparent
Operating on principles like “Customer is king,” “Quality first,” and “Transparency,” OSKO maintains a culture of integrity and commitment
✅ Broad Product Range & Customization
From aluminium to double offset and actuated butterfly valves, OSKO offers tailored solutions with interchangeable parts and actuator readiness
✅ Excellent Service & Delivery
Strong testimonials from clients in Chennai and Chandigarh demonstrate OSKO’s responsiveness, product knowledge, and timely delivery oskovalves.com. They also maintain training programs, technical support, and a dealer network across India and export markets
________________________________________

8. How to Select the Right Butterfly Valve
When choosing a butterfly valve, focus on:
1. Type: wafer for compact mounts, lug for isolation, flanged for permanent setups, double offset for high-pressure.
2. Material compatibility: ensure body, disc, and seat materials match your media and temperature (e.g., PTFE for corrosives, Viton for high heat).
3. Pressure & temp ratings: match PN10/16 or ANSI 150 standards.
4. Flow needs: consider full-bore designs for reduced pressure drop.
5. Actuation preferences: manual or actuated depending on system automation.
OSKO’s engineering team helps evaluate these parameters to offer the best fit.
________________________________________

9. FAQs — Answered by OSKO Experts
Q1: Difference between wafer and lug type butterfly valves?
A: Wafer valves clamp between flanges; lug types have threaded inserts and can isolate system ends.
Q2: Can butterfly valves handle high pressure?
A: Yes—double offset variants are built for high-pressure environments leveraging PTFE seats and superior torque.

Q3: How often should I maintain?

A: OSKO valves require minimal upkeep. Seats are replaceable, and periodic checks on disc, seats, and seals are advised annually in heavy-use environments.
________________________________________

To wrap up:
• Butterfly valves offer unmatched control, compactness, and economy.
• OSKO delivers a comprehensive product range—from aluminium and wafer types to actuated and double-offset variants.
• Their design integrity, global standards compliance, and customer-first philosophy position them as a top choice in India and beyond.
Ready to streamline your flow systems? Contact OSKO Valves today for expert guidance and a quote on high-quality butterfly valves. 📞 +91 88662 26757 | ✉️ info@oskovalves.com
________________________________________
Explore More

• OSKO Butterfly Valve Product Index
• About OSKO Valves & Credentials
• Contact OSKO Valves
• Check related blogs: “Why Choose Double Offset Butterfly Valves?”, “3 Checks for Best Quality Butterfly Valves” oskovalves.com+1LinkedIn+1Facebook+5oskovalves.com+5oskovalves.com+5