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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Butterfly Check Valve With Counterweight Mechanism, Slow Closing, DN50-DN600, Cast Steel Body

Butterfly Check Valve With Counterweight Mechanism, Slow Closing, DN50-DN600, Cast Steel Body

Butterfly Check Valve With Counterweight Mechanism, Slow Closing, DN50-DN600, Cast Steel Body thumbnail-3

Butterfly Check Valve With Counterweight Mechanism, Slow Closing, DN50-DN600, Cast Steel Body thumbnail-4

Butterfly Check Valve With Counterweight Mechanism, Slow Closing, DN50-DN600, Cast Steel Body thumbnail-5

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Butterfly Check Valve With Counterweight Mechanism, Slow Closing, DN50-DN600, Cast Steel Body photo-4

Butterfly Check Valve With Counterweight Mechanism, Slow Closing, DN50-DN600, Cast Steel Body photo-5

Product Spotlights

Features a counterweight mechanism for controlled slow closing to effectively prevent water hammer and protect piping systems. Constructed with a durable cast steel body for strength and longevity. Available in a wide DN50-DN600 size range for versatile applications in water supply, HVAC, and industrial settings. Offers a compact design, low pressure drop, and minimal maintenance for reliable, energy-efficient operation.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Water Supply

Body Material:

Cast Steel

Size Range:

DN50 to DN600

Contact Supplier Request Quote Chat Now

Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Application Other, Water Supply

Body Material Cast Steel

Size Range DN50 to DN600

Type Butterfly Check Valve with Counterweight

Closing Speed Slow Closing

Connection Type Wafer or Lug (Optional)

Seat Material EPDM, NBR, or FKM (Optional)

Disc Material Cast Steel with Coating (Optional)

Operation Automatic, Non-Slam

As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our precision-engineered Butterfly Check Valve with Counterweight Mechanism. Designed for reliability in demanding fluid control applications, this valve combines a robust cast steel construction with an intelligent slow-closing mechanism to prevent water hammer and protect your piping systems. With an annual export value reflecting our global reach across markets from North America to Southeast Asia, we deliver products that meet the exacting standards of international clients.

Our Butterfly Check Valve is engineered for superior performance and longevity. The key to its operation lies in the integrated counterweight mechanism, which ensures a controlled, slow closing action. This design is critical for eliminating the sudden pressure surges known as water hammer, which can damage pumps, pipes, and connected equipment. The valve opens freely with forward flow and closes gently when flow stops or reverses, making it an ideal choice for a wide range of applications.

Core Features & Technical Advantages:

Counterweight-Controlled Slow Close: The external counterweight system provides a reliable, mechanical method to regulate the disc's closing speed, independent of external power sources.
Robust Cast Steel Body: Manufactured from high-quality cast steel, the valve body offers exceptional strength and corrosion resistance, suitable for various media including water, air, and other non-aggressive fluids.
Non-Slam Operation: Significantly reduces hydraulic shock and associated noise, extending the service life of the entire pipeline system.
Compact & Lightweight Design: Compared to traditional swing check valves, the butterfly design offers a more compact footprint and lower weight, simplifying installation and saving space.
Bidirectional Sealing (Optional): Certain models can be configured for tight sealing in both flow directions, enhancing system safety and flexibility.
Low Pressure Drop: The streamlined disc design minimizes flow resistance when fully open, improving system efficiency and reducing energy consumption.

Detailed Technical Specifications:

Parameter	Specification
Size Range	DN50, DN65, DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600
Pressure Rating	PN10, PN16, PN25 (Customizable upon request)
Body Material	Cast Steel (WCB), Ductile Iron, Stainless Steel (Optional)
Disc Material	Cast Steel with Epoxy Coating, Stainless Steel (Optional)
Seat Material	EPDM (Standard for water), NBR, FKM/Viton (Optional for oils/fuels)
Connection	Wafer (Standard), Lugged (Optional), Flanged (Available)
Operating Temperature	-10°C to +120°C (Depends on seat material)
Standards	Design conforms to common international standards; ISO9001 certified manufacturing process.

Benefits for Your Project:

System Protection: The primary benefit is the effective prevention of water hammer, safeguarding pumps, meters, and delicate fittings from costly damage.
Reduced Maintenance: The gentle closing action and durable construction lead to less wear on the valve seat and disc, resulting in lower long-term maintenance costs and downtime.
Versatile Application: Ideal for water supply networks, HVAC systems, fire protection lines, industrial cooling circuits, and irrigation systems where flow reversal needs to be controlled smoothly.
Easy Installation & Adjustment: The counterweight mechanism is externally mounted and often adjustable, allowing field technicians to fine-tune the closing speed to match specific system requirements.
Reliable Performance: With no complex electronics or external power needed, the valve offers a simple, fail-safe solution that performs consistently even in remote or harsh environments.

Shanghai Zhibang's commitment to quality is underscored by our ISO9001 certification, ensuring every valve undergoes rigorous production and testing controls. With an annual export value of US$1-1.5 Million and a strong presence in key markets across five continents, our products are trusted by clients worldwide for critical infrastructure projects. Our strategic shipping ports in Shanghai, Guangzhou, Hong Kong, and Beijing facilitate efficient and reliable global logistics. Choose our Butterfly Check Valve with Counterweight for a dependable, maintenance-friendly solution that prioritizes the safety and longevity of your piping systems. Contact us today for a detailed quotation or to discuss your specific application requirements.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a slow-closing check valve?
A: The primary advantage is the prevention of water hammer. By closing slowly, it avoids creating a sudden pressure spike that can damage pipeline components, ensuring system safety and durability.
Q: Can the closing speed be adjusted on-site?
A: Yes, typically. The counterweight mechanism is designed for adjustment. By changing the position or mass of the counterweight, technicians can calibrate the closing speed to achieve optimal performance for the specific system conditions.
Q: Is this valve suitable for vertical pipe installation?
A: Installation orientation is crucial. This type of valve is generally designed for horizontal installation where the disc swings in a horizontal plane. For vertical lines, specific models or alternative check valve types should be considered; please consult our engineers.
Q: What media can this valve handle?
A: With standard EPDM seats, it is suitable for cold water, air, and other non-aggressive fluids. For hot water, oils, fuels, or mild chemicals, alternative seat materials like NBR or FKM are available upon request.
Q: How does this valve compare to a standard swing check valve?
A: It offers a more compact design, lighter weight, and, most importantly, a controlled slow-close function. Standard swing checks can slam shut, causing water hammer, whereas this valve's counterweight ensures a gentle, controlled closure.
Q: What maintenance does this valve require?
A: Maintenance requirements are minimal. Periodic inspection of the disc, seat, and hinge pin for wear is recommended. The external counterweight mechanism may require occasional lubrication of the pivot points.
Q: Do you offer customization for different pressure ratings or materials?
A> Yes, as a manufacturer, we offer customization. Pressure ratings higher than PN25, and alternative body/disc materials like stainless steel or special coatings can be provided based on your project specifications.
Q: What is your typical lead time and packaging?
A> Lead time depends on order quantity and specifications. Standard models are often available from stock. Valves are typically packaged in wooden cases suitable for export, ensuring they arrive in perfect condition.