Ductile Iron Wafer Butterfly Valve | Lever Operated

Product Overview

Tianjin Worlds Valve Co., Ltd. offers a simple, reliable wafer butterfly valve designed for general on/off service in water, HVAC, and low-pressure industrial applications. This classic model features a ductile iron body, a hard back-up seat (non-replaceable), a lever handle for manual operation, and a disc secured with pins to the stem.

The valve body is cast from GGG40/500-7 ductile iron and coated with a durable epoxy finish for corrosion resistance. The seat is of hard back-up construction-the elastomer (typically EPDM) is fully supported by a rigid backing molded into the body. This design prevents the seat from extruding or deforming under pressure, delivering consistent bubble-tight shut-off.

The disc is attached to the stem using stainless steel pins. This pinned connection provides positive torque transmission without relying on friction or splines, ensuring that the disc does not slip on the stem even under repeated cycling.

A manual lever allows the operator to open, close, or partially throttle the flow. The lever also serves as a clear visual position indicator-parallel to the pipe indicates open, perpendicular indicates closed.

Available in sizes from DN50 to DN3000  with pressure ratings up to PN10,PN16 or Class 150, this valve is a cost-effective workhorse for water lines, pump isolation, irrigation, and building services.

As a trusted China-based OEM manufacturer, we produce this valve strictly to customer specifications-size, pressure rating, flange drilling, epoxy color, and optional actuator mounting (ISO 5211 top flange) are all customizable.

Introduce:

Wafer Butterfly Valve | Ductile Iron Body | Hard Back-Up Seat (Non-Replaceable) | Lever Operated | Pin-Secured Disc

Tianjin Worlds Valve Co., Ltd. – Your Reliable Source for Durable, Cost-Effective Flow Control

CBF01-TA01 - Product Catalog

Key Features & Advantages:

1. Hard Back-Up Seat for Reliable Sealing

• The EPDM seat is molded with a rigid metal or plastic backing, which prevents extrusion under pressure.

• Delivers consistent, bubble-tight shut-off even after thousands of operating cycles.

• Note: The seat is non-replaceable, designed for long service life with no field maintenance required.

 

2. Pin-Secured Disc for Positive Torque Transmission

• The disc is fastened to the stem using one or two stainless steel pins, depending on valve size.

• Eliminates the risk of disc loosening or slipping on the stem – a common issue with spline or friction connections.

• Simplifies assembly and ensures reliable torque transfer throughout the valve's lifetime.

 

3. Ductile Iron Body with Epoxy Coating

• GGG40 ductile iron provides high strength, impact resistance, and long-term durability.

• Epoxy coating (standard 250µm thickness, any RAL color available) offers excellent corrosion protection.

• Compact wafer design saves installation space and reduces overall weight.

 

4. Lever Operation with Throttling Capability

• Intuitive Visual Indication: The hand lever clearly shows the valve position at a glance – parallel to the pipe means open, perpendicular means closed. No external indicators are required.

• Simple On/Off Control: The lever allows quick 90-degree rotation for fast opening and closing, requiring minimal hand force under normal pressure conditions.

• Basic Flow Regulation: The locking plate on the lever enables the disc to be fixed at intermediate angles, providing simple throttling capability for flow adjustment.

Standard:

 

Why Choose Tianjin Worlds Valve?

1. We manufacture valves strictly according to customer specifications, while also providing professional recommendations on material selection and installation to ensure optimal performance.

2. Our experience with pinned disc construction and hard back-up seats ensures long-term reliability in water and general service applications.

3. Full documentation, including material certificates and test reports, is provided with every order.

4. Our ISO 9001-certified facility supports global export, with certifications such as CE, UKCA, WRAS, and ACS available upon request.

Conclusion:

We invite you to contact us for a competitive quotation or to arrange a visit to our factory. Our team is ready to discuss your project requirements, offer technical support, and demonstrate our manufacturing capabilities firsthand.
Meeting your specific need:

dekai@worldsvalve.com