Universal Wafer Lever Butterfly Valve

Product Overview

The Universal Wafer Lever Butterfly Valve is engineered as a versatile and economical solution for a wide range of industrial flow control applications. Its compact wafer design allows for easy installation between standard pipe flanges, significantly reducing space requirements and overall system weight compared to other valve types.

Equipped with a robust manual lever actuator, this valve provides straightforward 90-degree on/off operation. Its universal design ensures compatibility with a broad spectrum of non-corrosive and mildly corrosive media, making it an ideal choice for general industrial, HVAC, water treatment, and irrigation systems.

Constructed with a durable ductile iron body and precision-machined disc, the Universal Wafer Lever Butterfly Valve delivers reliable performance and long service life in moderate pressure and temperature conditions, offering exceptional value for standard applications.

Key Features & Benefits

Compact Wafer Design

Space-saving body design allows for easy installation between standard pipe flanges, reducing overall system footprint and installation costs.

Manual Lever Actuator

Lightweight, ergonomic lever for quick and easy 90-degree on/off operation, suitable for moderate torque applications.

ISO/API Compliance

Fully compliant with ISO 5752 and API 609 standards for industrial butterfly valve design and performance.

Bi-Directional Sealing

Symmetrical disc design ensures reliable sealing performance in both flow directions, eliminating flow direction restrictions.

Durable Construction

Ductile iron body and stainless steel disc/shaft provide excellent durability and corrosion resistance for long service life.

Cost-Effective Solution

Optimized design and materials offer exceptional value for general-purpose industrial, HVAC, and water treatment applications.

Technical Specifications

Basic Parameters

Parameter	Specification Range
Nominal Diameter (DN/NPS)	DN50 ~ DN600 (2" ~ 24") Common Sizes: DN80, DN100, DN150, DN200, DN250, DN300
Nominal Pressure (PN/Class)	PN10, PN16 (10bar to 16bar) Class 150 (285psi)
Operating Temperature	-20°F ~ 300°F (-29°C ~ 149°C)
Applicable Media	Water, Oil, Air, Gas, Chemicals, Mildly Corrosive Fluids
Sealing Class	ISO 5208 Class IV

Material Specifications

Component	Material Options	Standards/Features
Valve Body	Ductile Iron	EN-GJS-400-15, Wafer Style
Disc	Stainless Steel	AISI 304/316, Precision-Machined for Optimal Sealing
Seat	NBR/EPDM/Viton	Synthetic Rubber, Abrasion and Chemical Resistant
Shaft	Stainless Steel	AISI 304/316, Anti-Corrosive Design
Actuator	Manual Lever	Ductile Iron or Aluminum Alloy, Ergonomic Design

Standards & Compliance

Design Standards: ISO 5752, API 609
Flange Standards: ISO 7005-1, ANSI B16.5 Class 150
Testing Standards: ISO 5208, API 598, Hydrostatic and Leakage Testing
Certifications: CE, ISO 9001

Working Principle

The Universal Wafer Lever Butterfly Valve controls fluid flow using a rotating disc and resilient seat mechanism:

Opening Process: Rotating the lever 90 degrees counterclockwise turns the disc to a parallel position with the flow direction, allowing media to pass through the valve with minimal resistance and pressure drop.
Closing Process: Rotating the lever 90 degrees clockwise turns the disc to a perpendicular position, compressing the resilient seat (NBR/EPDM/Viton) against the disc to create a tight seal and shut off flow.
Sealing Assurance: The resilient seat conforms to the disc surface, providing reliable bi-directional sealing even with fluctuating pressures. The lever design ensures quick and precise operation for on/off control in general industrial applications.

Application Areas

HVAC Systems

Heating, ventilation, and air conditioning systems in commercial and industrial buildings.

Water Treatment

Municipal water supply, wastewater treatment, and irrigation systems.

General Industry

Chemical processing, power generation, and manufacturing plants for non-critical applications.

Oil & Gas

Upstream, midstream, and downstream applications for non-corrosive oil and gas handling.

Installation & Maintenance

Installation Guidelines

Inspect valve for damage and confirm closed position before installation; clean pipeline flanges to remove debris.
Position the valve between two flanges, ensuring the valve body is centered and bolt holes align with flange holes.
Install gaskets on both sides of the valve body (if not already integrated) and secure with flange bolts.
Tighten flange bolts evenly in a crisscross pattern to avoid uneven pressure on the valve body and ensure proper sealing.
Ensure the lever is mounted correctly and operating in the proper direction (clockwise to close, counterclockwise to open).
Conduct hydrostatic testing (1.5×PN) and leakage testing after installation before commissioning.

Maintenance Recommendations

Regularly inspect the resilient seat for signs of wear, cracking, or deformation; replace the seat if necessary to maintain sealing performance.
Check the shaft and disc for corrosion or buildup; clean and lubricate the shaft bearings as needed to ensure smooth operation.
Inspect the lever actuator for loose connections or damage; tighten or replace components as required.
For long-term shutdown, flush the valve with clean water to remove any residual media and prevent seat hardening.
Use only manufacturer-recommended replacement parts to maintain performance and compliance with standards.

Frequently Asked Questions (FAQ)

Q: What is the advantage of a wafer-style butterfly valve?

A: Wafer-style valves are compact and lightweight, requiring minimal space between flanges. They are cost-effective and easy to install, making them ideal for applications where space and budget are primary considerations.

Q: Can the Universal Wafer Lever Butterfly Valve be used for throttling applications?

A: While primarily designed for on/off control, this valve can be used for basic throttling applications within a limited flow range (typically 10-60% open). For precise flow control, consider a control valve with a suitable actuator.

Q: What seat material should I choose for my application?

A: NBR is suitable for oil and water applications, EPDM for water and steam, and Viton for higher temperatures and chemical resistance. Contact our technical team for assistance in selecting the right seat material for your specific media.

Q: Is the Universal Wafer Lever Butterfly Valve suitable for vacuum applications?

A: This valve is designed for positive pressure applications. For vacuum service, specialized valves with enhanced sealing capabilities are recommended. Please consult with our sales team for vacuum-compatible solutions.

Need Custom Solutions?

Our engineering team can customize Universal Wafer Lever Butterfly Valves to meet your specific pressure, temperature, and media requirements. Contact us today for a personalized quote.

Contact Our Technical Team