A small butterfly valve is a type of valve featuring simple structure and easy operation. It controls the on-off status and flow rate of fluids through the rotation of a disc-shaped valve plate around its axis, and is suitable for various media such as air, water and oil. Its core advantages lie in small size, light weight and low cost, making it particularly ideal for large-diameter and low-pressure pipeline systems.

Product Parameters

Category	Specifications	Details
Core Technical Parameters	Nominal Diameter (DN)	DN15~DN400 (mainstream small diameter range), some models cover DN50~DN2000
	Nominal Pressure (PN)	0.6MPa~2.5MPa, commonly PN1.0/1.6MPa
	Applicable Temperature	-40℃~200℃ (standard soft seal), some high-temperature models up to 600℃
	Applicable Medium	Air, water, oil, steam, and weakly corrosive fluids
Structure & Performance Parameters	Valve Body Material	Gray cast iron, cast steel, stainless steel 304/316
	Seal Material	NBR, EPDM, PTFE (soft seal); metal hard seal (high-temperature conditions)
	Driving Mode	Manual, electric, pneumatic
Implementation Standards	Domestic Standards	GB/T 12238-2008 Butterfly valves with resilient sealing, face-to-face and centre-to-face dimensions; GB/T 13927-2008 Industrial valves - Pressure testing
Implementation Standards	International Standards	ANSI B16.104, ISO 5211

Product Advantages

Simple to Operate: The disc-shaped butterfly plate rotates 0°–90° for quick on-off and precise flow control.
High Adaptability: Compatible with air, water, oil and more; ideal for large-diameter, low-pressure pipelines.
Cost-Effective: Compact, lightweight and low-cost; features low pressure drop and strong corrosion resistance.

Main Applications

Water treatment: Flow regulation and on-off control in water supply, sewage and circulating water pipelines.
Petroleum and chemical: Transport and process control of crude oil, chemicals and industrial gases.
Large-diameter, low-pressure systems: Ideal for ventilation and industrial water pipelines.