Butt Welded Check Valves

The Hanno Valve butt welded check valve features an internal rocker arm rotary opening structure, with all opening and closing components installed inside the valve body, preventing external leakage except for the sealing gasket and sealing ring at the middle flange. The rocker tube and valve release connection use a spherical connection structure, providing the valve with 360-degree freedom and micro-position compensation. This valve is ideal for clean media, such as water, steam, oil, nitric acid, acetic acid, and urea, but not suitable for media containing solid particles or high viscosity. It is commonly used in pipelines for industries such as petroleum, chemicals, pharmaceuticals, fertilizers, and electricity.

Product Key Features

Our Butt Welded Check Valves have been selected by industries such as power, chemical, petroleum, and water conservancy. Through many years experience, they are proven to meet the needs of diverse industrial applications.

Consistently improving to maintain top quality product quality.

Trusted by both domestic and international customers.

About Hengnuo Valve

Zhejiang Hengnuo Valve Manufacturing Co., Ltd. has 25 years valves manufacturing experience, located in Chinese industrial valves manufacturing base - Zhejiang Lishui Bihu valves industry area, the production area is 18000 square meters. Hengnuo Valve has 150 staff members, senior technicians more than 32 people. The companys main products are gate valves, check valves, globe valves and power station valves. Hengnuo Valve also has their own foundry, foundry using the most advanced precoated sand technology, provide for the factory high quality and high precision castings, highly improved the quality and production time for Hengnuo Valve.

Core Advantages of Hanno Valve Butt Welded Check Valves

The Hanno Valve butt welded check valve offers several distinct advantages over conventional check valve designs. The internal rocker arm rotary structure ensures that all moving parts remain inside the pressure boundary, minimizing potential leak paths. Only the middle flange sealing gasket and sealing ring are external contact points, which simplifies maintenance and inspection routines.

The spherical connection between the rocker tube and valve release provides 360-degree freedom and micro-position compensation. This feature allows the Hanno Valve butt welded check valve to accommodate minor pipe misalignment and thermal expansion without binding. As a result, users report longer service intervals and reduced wear on sealing surfaces.

For procurement professionals seeking a dependable butt welded check valve, the Hanno Valve product line delivers consistent performance across demanding applications including upstream oil and gas, chemical processing, and high purity pharmaceutical systems.

Technical Specifications

Parameter	Specification
Size Range	1/2 inch to 20 inch (DN15 to DN500)
Pressure Class	ASME Class 150 to 2500, PN16 to PN420
Body Materials	WCB, WC6, WC9, CF8, CF8M, CF3M, Duplex Stainless Steel
Seat and Disc Materials	SS304, SS316, Stellite hardfacing (optional)
End Connection	Butt weld ends ASME B16.25
Temperature Range	-29 deg C to +425 deg C (higher on request)
Applicable Media	Water, steam, oil, nitric acid, acetic acid, urea (clean media only)
Design Standards	API 6D, ASME B16.34, ISO 15761

Material Comparison and Operating Limits

Material Grade	Max Working Pressure at 100 deg F	Typical Service
WCB Carbon Steel	285 psi (Class 150) / 740 psi (Class 300)	Water, steam, oil, gas
CF8M 316 Stainless Steel	275 psi (Class 150) / 720 psi (Class 300)	Corrosive and acidic media, pharmaceutical lines
CF3M Low Carbon 316L	275 psi (Class 150)	Urea, nitric acid, high purity water
WC9 Alloy Steel	740 psi (Class 300) up to 540 deg C	High temperature steam, power station applications

Why Choose Hanno Valve Butt Welded Check Valves for Your Project

When you source a Hanno Valve butt welded check valve, you benefit from 25 years of manufacturing expertise and a vertically integrated production process. The in-house foundry uses precoated sand technology to produce high precision castings, ensuring consistent wall thickness and defect-free components. This directly translates to reliable performance in the field.

The Hanno Valve butt welded check valve is trusted by domestic and international customers in power generation, oil and gas, chemical processing, and water treatment. Repeat orders from major engineering firms confirm the product's durability and value proposition.

For buyers seeking a butt welded check valve that balances performance, reliability, and cost effectiveness, Hanno Valve provides a proven solution backed by documented field history and comprehensive quality control.

Frequently Asked Questions

Q: Can Hanno Valve butt welded check valves be installed in vertical lines?
A: Yes, but only with upward flow direction (bottom to top). The disc relies on gravity to close, so vertical downward flow is not recommended. Contact Hanno Valve engineering for specific installation guidance.

Q: What media are not suitable for these valves?
A: The Hanno Valve butt welded check valve is designed for clean media. It should not be used with fluids containing solid particles, slurries, or high viscosity liquids that could prevent proper disc seating.

Q: What documentation is provided with each valve?
A: Standard documentation includes material test certificate (EN 10204 3.1), hydrostatic pressure test report, visual inspection record, and valve identification tag. Third party inspection can be arranged upon request.

Q: What is the typical lead time for Hanno Valve butt welded check valves?
A: Standard lead time is 15 to 30 working days depending on material grade and quantity. The in-house foundry allows shorter lead times for common materials like WCB and CF8M.

Q: How does the spherical connection improve service life?
A: The spherical joint provides up to plus or minus 2 degrees of angular misalignment compensation. This reduces stress on the rocker arm and hinge components, preventing premature wear caused by pipe thermal expansion or installation tolerances.

Q: Are replacement parts available for Hanno Valve butt welded check valves?
A: Yes, Hanno Valve stocks replacement sealing gaskets, sealing rings, and complete trim assemblies for all standard sizes. Contact the parts department with your valve serial number for correct identification.