Home Valve ComparisonsButterfly Valve vs Gate Valve: Which Is Right for Your Pipeline?

Valve Comparison Guide

Butterfly Valve vs Gate Valve: Which Is Right for Your Pipeline?

Butterfly valve vs gate valve for pipelines: size, weight, face-to-face (EN 558 vs ASME B16.10), flow restriction, pressure class limits, AWWA vs API service, and cost comparison.

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Overview

Butterfly Valve

A butterfly valve uses a disc rotating 90° within the pipe bore. Butterfly valves are significantly lighter and less expensive than gate valves at large bore, with short face-to-face (wafer type) and suitability for DN50 to DN1200 in water, HVAC, and moderate-pressure process service. Triple-offset butterfly valves extend capability to Class 600 metal-seated service.

DN50–DN1200, Class 150–600 (triple-offset), API 609 / AWWA C504 / EN 593

Gate Valve

A gate valve provides full-bore isolation with zero pressure drop in the open position. Gate valves handle Class 150 through Class 2500 in alloy steel for high-temperature power and refinery service. OS&Y rising stem provides positive open/closed indication. Heavier and longer than butterfly valves at large bore, but the only option for full-bore piggable and high-temperature alloy steel pipeline service.

DN50–DN900, Class 150–2500, WCB / WC6 / WC9, API 600 / ASME B16.34

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Pros & Cons

Butterfly Valve

5–10× lighter than equivalent gate valve at large bore - reduces structural support cost

Very short face-to-face (wafer type) - saves piping space and weight

Significantly lower cost at DN300 and above

Suitable for DN50–DN1200 in water and HVAC service

Triple-offset design achieves metal-seated shut-off for Class 300–600 service

Suitable for moderate throttling in cooling water systems

Disc always in flow path - pressure drop and turbulence when throttling

Wafer design not suitable for end-of-line service (lug or double-flanged required)

Standard concentric type limited to Class 150 and below in most services

Elastomeric seats limit temperature compatibility and chemical resistance

Not full-bore - cannot accommodate pipeline pigs

Gate Valve

Full-bore - zero pressure drop, piggable pipeline capability

Full pressure class range: Class 150 to Class 2500 with alloy steel

High-temperature alloy steel available: WC6, WC9, P91 for steam service

OS&Y rising stem - positive visual indication of valve position

Non-rising stem available for buried or headroom-restricted service

ASME B16.10 face-to-face matches existing piping layouts

Heavy - much heavier than butterfly valve at DN300+

Longer face-to-face - requires more piping space

Much more expensive at DN300+ compared to butterfly valve

Multi-turn operation - slow; gear actuator needed at DN200+

Not suitable for throttling service

Butterfly Valve vs Gate Valve - Specification Comparison

Parameter	Butterfly Valve	Gate Valve
Weight at DN600	~80–120 kg (wafer butterfly valve)	~600–900 kg (Class 150 gate valve)
Face-to-Face	Short (wafer: ~40–80 mm); EN 558 lug/flanged	Long (ASME B16.10 - significantly longer)
Full Bore / Pigging	Not full bore - disc obstructs flow at all times	Full bore - gate retracts completely, piggable
Max Pressure Class	Class 150 (concentric/double-offset); Class 600 (triple-offset)	Class 2500 with alloy steel
High-Temperature Service	Up to 650°C (triple-offset metal seat)	Up to 650°C (WC9/P91 alloy steel)
Cost at DN400	~40–60% less expensive than gate valve	Baseline - more expensive at large bore
Water Utility Standard	AWWA C504 (rubber-seated butterfly valve)	AWWA C500 (metal-seated gate valve)
Oil & Gas Standard	API 609 (butterfly valves)	API 600 / API 6D (gate and pipeline valves)
Throttling	Moderate (not precision control)	Not suitable for throttling
Operation Speed	Quarter-turn - fast	Multi-turn - slow (gear operator for DN200+)

When to Use Each

Use Butterfly Valve when:

Large bore water supply and distribution (DN300–DN1200, AWWA C504)

Cooling water and HVAC systems

Marine seawater systems - lightweight advantage on vessels

Fire suppression isolation (UL/FM listed butterfly valves)

Moderate pressure process service with triple-offset design

Use Gate Valve when:

Full-bore piggable pipeline isolation (oil & gas, API 6D)

High-temperature steam and power plant service (ASME B16.34, IBR)

Refinery and process plant alloy steel service (WC6, WC9, P91)

Fire protection systems (OS&Y gate valves - NFPA 13)

Buried service with non-rising stem

Decision Guide

Choose a butterfly valve for large bore (DN300+) water treatment, water distribution, cooling water, HVAC, and fire suppression service where weight, cost, and compact face-to-face are priorities. Choose a gate valve for oil & gas pipelines requiring full-bore pigging capability, high-pressure Class 300+ service, high-temperature alloy steel steam and power plant applications, and fire protection OS&Y requirements. At DN150 and below, gate valves and butterfly valves are both viable - gate valves dominate process plants and steam service; butterfly valves dominate HVAC and water service. At DN600 and above for water service, AWWA butterfly valves (C504) are the economical standard; for oil & gas pipelines at the same bore, API 6D gate valves or ball valves are specified.

Frequently Asked Questions

Why is butterfly valve cheaper than gate valve at large bore?

Butterfly valves contain much less metal than gate valves at large bore. A DN600 wafer butterfly valve has a thin disc and a short body - total weight ~100 kg. An equivalent DN600 Class 150 gate valve has a large, heavy body to house the full-diameter gate in its retracted position, plus the heavy OS&Y stem - total weight ~700–900 kg. The difference in raw material weight directly translates to a large cost difference, making butterfly valves the economic choice for large bore on/off service in water and cooling applications.

Can a butterfly valve replace a gate valve in water supply systems?

Yes - AWWA C504 rubber-seated butterfly valves are the standard valve for water supply and distribution systems at DN150 and above, and have largely replaced gate valves in new water utility construction. AWWA C504 butterfly valves are NSF/ANSI 61 certified for potable water. Gate valves (AWWA C500) are still used for buried service, fire hydrant connections, and where full-bore pigging or flushing is required.

What is EN 558 for butterfly valve face-to-face dimensions?

EN 558 defines the face-to-face and end-to-end dimensions for industrial valves used in piping. For butterfly valves, EN 558 Series 13 covers wafer pattern face-to-face; Series 14 covers lug type. Series 20 covers double-flanged (long pattern). The very short wafer face-to-face (25–80 mm for DN50–DN600) is a key advantage for butterfly valves in space-constrained installations and retrofit of existing gate valve locations is not always possible due to the longer gate valve face-to-face.

Reviewed by Application Engineering, Vajra Industrial SolutionsDiscipline: Valve Application EngineeringLast reviewed: 20 June 2026