The lift check valve ensures reliable backflow prevention in high-pressure pipelines, offering corrosion resistance and compact design for water, oil, and gas systems up to pn40 and 425°c.
The lift check valve ensures reliable backflow prevention in high-pressure pipelines, offering corrosion resistance and compact design for water, oil, and gas systems up to pn40 and 425°c.
Lift check valves are designed for high-pressure service where reliable backflow prevention and precise guidance of the disc are critical.
The valve seat is similar to a globe valve. The disc is designed as a piston or a ball to ensure effective sealing.
Suitable for high-pressure applications with high flow velocity, where precise disc guidance prevents vibration and wear.
Can be installed in horizontal pipelines or vertical pipelines with upward flow. Flow must always enter from below the seat.
Flow pressure lifts the piston or ball from the seat. When flow stops or reverses, the disc returns to the seat by gravity and backflow pressure.
The Lift Check Valve is a robust non-return valve designed for reliable backflow prevention in high-pressure industrial pipelines, ensuring unidirectional flow for water, oil, gas, and chemical systems. Featuring a piston or disc that lifts vertically to allow forward flow and closes automatically against reverse pressure, this valve protects pumps, compressors, and piping systems from damage. Constructed from high-strength materials like ASTM A105 carbon steel, ASTM A182 F316 stainless steel, or forged alloys, with optional coatings such as epoxy or PTFE, it offers superior corrosion resistance, making it ideal for backflow prevention valve applications in oil and gas, petrochemical, and power generation industries.
Compliant with API 602 for forged steel valves and ASME B16.34 for manufacturing, the lift check valve is available in sizes from 1/4" to 4" (DN8 to DN100) with threaded (NPT), socket weld, or flanged end connections per ASME B16.11 and B16.5. It supports pressure ratings up to PN40 (ANSI Class 150-600) and temperatures from -29°C to 425°C, with seat options including metal-to-metal for high temperatures or resilient EPDM for bubble-tight sealing in low-pressure systems. The guided disc ensures precise alignment, minimizing wear and ensuring zero-leakage performance, validated through hydrostatic and air testing per API 598. Certifications like NACE MR0175 for sour service and fire-safe API 607 enhance its suitability for critical industrial flow control applications.
The valve’s forged construction eliminates casting defects, providing exceptional mechanical integrity with tensile strengths above 485 MPa and yield strengths of 250 MPa, ideal for high-pressure and high-vibration environments. Its corrosion resistant check valve properties are enhanced by surface treatments like electroless nickel plating or 3LPE coatings, protecting against pitting, chlorides, and abrasive media like slurries, ensuring a service life up to three times longer than cast valves in harsh conditions. The compact design, often 50% lighter than swing check valves, reduces installation costs, while the low cracking pressure (0.1-0.5 bar) ensures quick response in dynamic flow conditions, optimizing efficiency in non-return valve setups.
Compared to swing or dual-plate check valves, the lift check valve excels in vertical installations and high-pressure systems, offering a self-cleaning wiping action that prevents debris buildup in dirty fluids. Its spring-loaded or gravity-assisted disc ensures reliable closure without external actuation, making it suitable for space-constrained applications like modular plants or offshore platforms. Optional features, such as Y-pattern bodies for reduced flow resistance or cryogenic extensions for LNG service, enhance versatility. Rigorous nondestructive testing (RT, UT, MT, PT) per ASME Section V confirms defect-free construction, ensuring compliance with global standards like BS 5351 and MSS SP-126.
Addressing challenges like backflow contamination, pipeline erosion, and equipment failure, the lift check valve incorporates durable seals and a guided disc mechanism for long-term performance. Its compatibility with ANSI, DIN, and JIS flange standards, along with coatings like FBE or PTFE, ensures global applicability in corrosion resistant check valve applications. Whether preventing reverse flow in boiler feed lines or protecting pumps in refinery systems, the Lift Check Valve delivers cost-effective, low-maintenance industrial flow control for diverse global operations.
Engineered for high-pressure backflow prevention with compact design and corrosion resistance.
When the fluid flows in the intended direction, the pressure on the inlet side pushes the disc upwards, away from the seat. This allows the fluid to pass through the valve body and over or around the disc to the outlet.
If the flow pressure decreases or reverses, the disc moves downward, aided by gravity and/or a spring. The disc then seats firmly against the valve seat, creating a tight seal that prevents backflow.
Check valves are essential components that ensure safe and efficient operation of fluid systems by controlling flow direction and preventing backflow.
Permits fluid flow in one direction and automatically closes to prevent backflow in the opposite direction.
Uses hinged or spring-loaded flaps, discs, or pistons that open with forward flow and close with backflow.
Includes swing, lift, ball, and diaphragm check valves, each suited for different applications and conditions.
Widely used in water, wastewater, oil & gas, HVAC, and many other industrial applications.
Helps avoid sudden pressure surges caused when fluid flow is abruptly stopped.
Simple and reliable design ensures long-term efficiency with minimal upkeep.
Check valves are one-way valves that allow fluid to flow in a single direction and automatically prevent backflow. They are widely used in pipelines to protect pumps, piping, and other equipment. Backflow preventers apply additional pressure to ensure water flows only one way, providing extra protection for drinking water systems.
Allows fluid to flow in one direction and automatically prevents backflow.
Protects pumps, piping, and other equipment.
Check Valve: Simple, hinged or spring-loaded disc.
Backflow Preventer: Uses pressure and fail-safes to protect drinking
water.
Hinged disc swings open to allow forward flow and closes to prevent backflow.
Low turbulence and low pressure drop.
Piston or ball lifts from the seat to allow flow.
Suitable for high-pressure and high-velocity systems; can be installed horizontally or
vertically.
Ball Check, Butterfly Check, and Tilting-Disk Check valves.
Each design is optimized for specific applications and conditions.
- Unidirectional flow control
- Low maintenance
- Prevents water hammer
- Wide range of sizes & materials
- Versatile in water, oil, gas, and HVAC systems
| Feature | Check Valve | Backflow Preventer |
|---|---|---|
| Primary Function | Allows flow in one direction; prevents reverse flow automatically | Prevents contamination of drinking water; ensures flow only in one direction using pressure & fail-safes |
| Mechanical Design | Hinged disc, flap, piston, or ball opens with flow and closes with backflow | Multiple valves, check mechanisms, or air gaps to enforce one-way flow |
| Application | Pipelines, pumps, HVAC, water & wastewater, oil & gas | Potable water supply, irrigation, hospitals, schools, commercial buildings |
| Pressure Handling | Medium to high pressure; depends on valve type | High reliability; designed for pressurized systems to prevent contamination |
| Maintenance | Low; simple design, few moving parts | Moderate; more components, periodic inspection recommended |
| Reliability | Good for general use; may fail under extreme conditions | Highly reliable; multiple fail-safes for drinking water protection |
| Organization | Standard | Description |
|---|---|---|
| ANSI | American National Standards Institute | General industrial standards |
| API | American Petroleum Institute | Standards for oil and gas industry |
| ASME | American Society of Mechanical Engineers | Boiler and pressure vessel codes |
| BS | British Standards | UK national standards |
| GB, JB, HG | China Valve Standards | Chinese national and industry standards |
Upstream, midstream, and downstream operations, including drilling, refining, and transportation.
Handling corrosive and hazardous chemicals in various chemical plants.
Steam, water, and fuel systems in thermal, nuclear, and hydroelectric plants.
Municipal water supply, wastewater treatment, and industrial water management.
Heating, ventilation, and air conditioning systems in commercial and industrial buildings.
Sterile and hygienic applications, precise flow control in sensitive industries.
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