Cast Steel Lift Type Check Valve

The Cast Steel Lift Type Check Valve (also known as a non-return valve, one-way valve, or back pressure valve) is an automatic valve essential for controlling the unidirectional flow of media within a pipeline. It is a robust component used to prevent media backflow and protect upstream equipment, such as pumps, from damage.

This valve is engineered and manufactured to stringent industry standards for high-pressure and high-temperature services.

⚙️ Key Technical Specifications

Parameter	Specification Range	Note/Standard
Nominal Size ( $\text{DN}$ )	$\text{DN}15 - \text{DN}500$	Wide range from small to large pipelines.
Working Pressure ( $\text{PN}$ )	$\text{PN}1.0 - \text{PN}42.0\,\text{MPa}$	Suitable for low to extremely high-pressure environments.
Working Temperature	$-196^\circ\text{C}$ to $540^\circ\text{C}$	Adaptable to cryogenic to high-temperature services.
Design/Manufacturing Standard	$\text{GB}/\text{T}12235$ , $\text{API}6\text{D}$	Strict adherence to international and national standards.
Flange Connection Standard	$\text{ASME B}16.5$ , $\text{JB}/\text{T}79$	Standard industrial flange connections.
Pressure-Temp Standard	$\text{ASME B}16.34$	Compliance with pressure-temperature ratings.
Testing Standard	$\text{GB}/\text{T}13927$	Guaranteed to pass rigorous testing, including air tightness.
Body Material Options	Cast Carbon Steel, Stainless Steel, etc.	Customizable to media and environment.

⭐ Core Design and Operational Feature

Lift Disc Mechanism:
- The valve disc utilizes a central alignment structure that lifts to open.
- It is opened automatically by the pressure of the forward-flowing medium and closes reliably based on gravity or back pressure when the flow stops or reverses.
Excellent Sealing and Wear Resistance:
- The sealing surface employs Hard Alloy Overlay Welding to significantly enhance its resistance to wear and corrosion, ensuring a long and reliable service life.
- The guide sleeve uses a special material with good wear resistance and a low friction coefficient, ensuring the disc operates flexibly and reliably.
High-Performance Capabilities:
- Wide Range: Designed to handle an extensive range of sizes, pressures, and extreme temperatures (from cryogenic to high heat).
- Low Flow Resistance: The valve has a compact structure and offers low fluid resistance when fully open.
Installation Versatility:
- Supports installation in both horizontal and vertical pipelines. Note: For vertical installation, the medium flow must be upward (from bottom to top).
Quality Assurance:
- Every valve undergoes strict air tightness testing ( $\text{XL}-500\text{A}-\text{V}$ instrument mentioned as a modern, efficient method, replacing traditional oil/water testing) before delivery, guaranteeing zero pollution and operational reliability.

🏭 Application Fields

The Lift Type Check Valve is a crucial component in process regulation systems, widely applied in:

Petroleum (Oil & Gas)
Chemical Industry
Pharmaceuticals
Electric Power Generation
Any pipeline system where preventing media backflow and protecting pump/compressor equipment is essential.

This Cast Steel Lift Type Check Valve offers robust performance across extreme conditions.