The Lever Operated Butterfly Valve is a high-efficiency industrial flow control solution characterized by its streamlined structure, compact footprint, and lightweight design. Engineered for precision, the valve utilizes a disc that rotates around a central axis within a cylindrical channel; a 90-degree turn of the lever transitions the valve from a fully closed position to a fully open state, providing rapid and reliable flow modulation.

Designed for versatility across various industrial piping systems, these valves are typically optimized for sizes DN50 to DN300 (2" - 12"). For larger installations (DN200/8" and above), gear operators are recommended to ensure ease of operation. By combining robust material options with strict adherence to international standards, our lever-operated butterfly valves ensure long-term durability and leak-proof performance in demanding environments.

Detailed Parameters

Body Materials	Grey Cast Iron, Ductile Cast Iron, Stainless Steel 304/316, Carbon Steel	Disc Materials	Ductile Cast Iron (Nickel-plated/Nylon coated), Stainless Steel 304/316, Aluminum Bronze
Stem Materials	Stainless Steel 410, 416, 304, 316	Seat Materials	EPDM, BUNA-N, PTFE, Viton, Hypalon, Neoprene, Metal Seated
Pressure Ratings	CLASS 125/150, PN10/16/25, 5K/10K/16K	Applicable Standards	API 609, BS5155, MSS SP-67/68, EN593
Operating Range	DN50 - DN300 (2" - 12")	Rotation Angle	0° (Closed) to 90° (Fully Open)
Lever Materials	Carbon Steel, Malleable Iron, Aluminum, Stainless Steel	Connection Type	Wafer, Lug, Flanged

Key Advantages

Robust Durability

Available in stainless steel and carbon steel to resist corrosion and wear in harsh industrial media.

Rapid Actuation

Quick 90-degree lever operation allows for immediate isolation and flow control of the pipeline.

Space Efficient

Small size and lightweight construction reduce installation space and overall system weight.

Flow Optimization

Superior flow control characteristics minimize pressure drop and turbulence within the channel.

Visual Status

The position of the lever provides an immediate visual indicator of whether the valve is open or closed.

Standard Compliance

Fully compliant with API 609 and BS5155, ensuring global interoperability and quality.

Product Gallery

Industrial Lever Operated Butterfly Valve China Factory and Suppliers

Management Platforms

Material Selection

Precise matching of body and seat materials based on fluid chemistry and temperature.

Precision Engineering

CNC machining of the valve disc ensures tight sealing and low leakage rates.

Quality Inspection

Rigorous pressure testing and leakage checks before shipment to ensure site reliability.

Installation Guide

Comprehensive guidance on orientation to prevent upside-down installation errors.

Logistics Control

Optimized packaging for industrial valves to prevent transit damage to the lever.

After-Sales Support

Professional technical support for maintenance and regular inspection scheduling.

Investment Return Comparison

Feature Comparison	Lever Operated	Gear Operated	Automated Actuator
Initial Cost	Very Low	Moderate	High
Operation Speed	Instantaneous	Slow/Controlled	Automated/Fast
Installation Effort	Minimal	Moderate	Complex
Maintenance Needs	Very Low	Low	Moderate
Best For Size	DN50 - DN200	DN200 and Above	Large/Remote Scale

Frequently Asked Questions

Q: Can Butterfly Valves be used for pipeline terminations?

Only Lug-type butterfly valves can be used for terminations. They require a special flange connection to allow the pipeline to be disconnected from one side.

Q: What are the available materials for the handle lever?

Depending on the environment, levers are available in carbon steel, malleable iron, aluminum, and stainless steel to prevent corrosion.

Q: When should I switch from a lever to a gear operator?

While lever operators work for up to DN300, it is highly recommended to use gear operators for sizes DN200 (8") and larger due to the increased torque required to move the disc.

Q: Are there any restrictions on the installation position?

Yes, butterfly valves should not be installed upside down. Additionally, you must ensure there is enough clear operating space for the handle to rotate a full 90 degrees.

Q: Which seat material is best for high-temperature applications?

For high-temperature or chemically aggressive media, PTFE or Metal Seated options are preferred over EPDM or BUNA-N.

Q: What industrial standards do these valves comply with?

Our industrial valves are manufactured in accordance with API 609, BS5155, MSS SP-67/68, and EN593 standards to ensure global quality and safety.