Trusted Nozzle Check Valve Manufacturer

NTVAL provides high-performance Nozzle Check Valves with minimal pressure loss and effective backflow prevention. Precision-crafted for durability and long-term reliability, our valves meet strict industry standards. Choose NTVAL for quality and dependability.

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Learn More About Nozzle Check Valve

Nozzle Check Valve 7
Nozzle check valves are designed for situations where fluid, gas, or slurry is pumped at low pressure or with intermittent flow. They are specifically made to close quickly and quietly during low pressure or no-flow periods, effectively preventing reverse flow.
 
In these valves, the shutoff mechanism is a disc held against the seat by an internal spring. When the pressure from the fluid, gas, or slurry at the inlet overcomes the spring’s closing force, the spring compresses, allowing the flow to pass through. When the flow slows or stops, the spring automatically closes the valve to prevent backflow.
 
Nozzle check valves are versatile and can be used in a wide range of settings. They are essential for reducing water hammer in residential plumbing and preventing backflow in heavy industrial applications, such as chemical processing, cooling towers, and mine dewatering.
 
These valves have proven particularly effective in chemical and petroleum processing plants, where they prevent backflow while ensuring a tight shut-off. In mixing processes that require precise component ratios, like ethanol-additive blending, backflow protection is crucial.

Features And Benefits of Nozzle Check Valve

Features of Nozzle Check Valve

Durability with Extensive Cycle Testing

  • Spring tested to over 25 million cycles.

Engineered for Optimal Performance

  • Engineered products that can be optimized to suit system flow conditions.

Class A Low-Emission Gasket for Environmental Compliance

  • Incorporates a Class A low-emission gasket to ensure minimal emissions and adherence to environmental standards.

High Flow Capacity for System Efficiency

  • Provides high flow capacity, minimizing flow velocity to enhance overall system efficiency.

Zero Leakage

  • Provides zero leakage performance compared to other check valve types.

Axial Flow

  • Disc and seating configuration provide a streamlined flow path with a venturi effect, resulting in minimal pressure drop.

Short Stroke Spring-Assisted Disc

  • Inlet flow velocity moves the disc axially with a short stroke. As flow velocity reduces, a compressed spring initiates valve closure, providing a quick response.

Customizable Spring Options

  • The choice of spring affects critical velocity and valve response. Selection is based on an engineering evaluation of specific applications. In the absence of this data, a standard spring will be provided.

Anti-Rotation Device

  • The anti-rotation device secures the disc assembly and eliminates the risk of disc rotation.

 

Benefits of Nozzle Check Valve

Minimizes Water Hammer Effects

  • Minimizes the damaging effects of water hammer in fluid systems.

Eliminates Valve Chatter

  • Removal of chatter associated with conventional valves in reciprocating compressor service.

Reduces Pressure Loss

  • Minimizes pressure loss in piping systems.

Protection Against Flow Reversal

  • Protects rotating equipment from damage due to flow reversal.

Enhanced Durability with Full Satellite Disc and Seat

  • Features a full satellite disc and seat for increased durability and reliable performance.

Optimized Low-Emission Valve Technology

  • Designed with low-emission valve technology optimized for extended service life and operational efficiency.

Low Pressure Cracking

  • Engineered for low pressure cracking, ensuring efficient and responsive valve operation.

Quicker Flow Changes

  • Quick and responsive to changes in flow pressure and velocity.

Minimized Pressure Loss

  • Minimizes pressure loss in the system for efficient operation.

Reduced Water Hammer

  • Reduces or eliminates water hammer and its damaging effects.

Prevents Valve Chatter in Low-Flow Conditions

  • Prevents valve chatter in low-flow conditions for smoother operation.

Protect Pumps

  • Protects pumps and rotating equipment from reversed flows.

Minimal Moving Parts for Longevity

  • Few moving parts, ensuring valve longevity and proven reliability.

 

 

Applications of Nozzle Check Valve

Nozzle check valves by NTVAL can be deployed in a wide variety of applications in the oil & gas and petrochemical industries when high-quality, reliable valves are required. A few example applications include:
Applications of Nozzle Check Valve

Gas Transmission

  • Compressor Suction/Discharge/Bypass

Power Generation

  • Feedwater
  • Cooling water
  • Blowdown
  • Steam

Petrochemical / Chemical Processing

  • PDH
  • Extreme Units
  • Propylene Units
  • Ethylene

Hydrocarbon Processing

  • Catalytic Cracking
  • Hydrotreating

Water Transmission

  • Pipeline
  • Pump Compressor Station
  • Desalination (SWRO)

Renewable Energy

  • Solar
  • Wave Energy
FPSO
LNG
High-temperature services
Solids handling (powders, fines, dust, and catalysts)
Solids handling (powders, fines, dust, and catalysts)
Polyethylene or polypropylene
Coal conversion and gasification
Thermal fluids
Separator, filter, and drying systems
Compressor stations
On/off isolation service
Oil & gas manifolds

 

Technical Details

Our nozzle check valves are available in forged or cast options and can be made from exotic materials, all with short delivery times.

  • 2″– 84″ / DN15-450
  • Class 150 – 4500
  • API 6A Class 2000 – 15,000
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Specs of Nozzle Check Valve

Material Composition
Nozzle check valves are primarily constructed using high-quality materials such as stainless steel, carbon steel, and specialized alloys. Stainless steel, such as SS316, is widely used for its corrosion resistance, particularly in harsh environments like chemical processing or marine applications. These material choices make the valve ideal for use in applications involving extreme temperatures, corrosive fluids, or high-pressure systems.
Size and Dimensions
Nozzle check valves are available in a variety of sizes to accommodate different system requirements, with standard diameters typically ranging from 2 inches to 24 inches. What’s even better is that the dimensions are designed to comply with international standards such as ANSI B16.10 for face-to-face measurements, making them compatible with most pipeline systems.
Pressure and Temperature Ratings
Pressure ratings can range from 150 PSI for lower-pressure applications up to 1500 PSI for more demanding high-pressure systems. The valves are also capable of operating in temperature extremes, typically from -50°F to 800°F, allowing for effective performance in both cryogenic and high-temperature environments. This versatility makes them suitable for industries such as oil and gas, petrochemicals, and steam systems.
Flow Capacity (Cv Value)
The flow capacity of a nozzle check valve is measured by its Cv value, which indicates the volume of fluid that can pass through the valve at a specified pressure drop. Larger nozzle check valves naturally have higher Cv values, offering greater flow rates. NTVAL suggests that selecting a valve with an appropriate Cv value helps maintain efficient flow throughout the system while minimizing pressure loss.

Features of Nozzle Check Valves

Advanced Backflow Prevention

Nozzle check valves are specifically designed to prevent backflow in piping systems. The unique nozzle shape and spring-loaded disc guarantee that the valve closes quickly when the flow stops, effectively preventing any reverse flow. This feature is crucial for maintaining the integrity of the system and preventing contamination or damage. The advanced backflow prevention capability makes these valves ideal for critical applications.

Low Pressure Loss

One of the standout features of nozzle check valves is their ability to minimize pressure loss. The streamlined design allows for smooth and efficient fluid flow, reducing turbulence and maintaining high flow rates. This design feature makes sure that the system operates efficiently without significant drops in pressure. By minimizing pressure loss, these valves help maintain optimal system performance and energy efficiency.

High Durability and Corrosion Resistance

Nozzle check valves are constructed from materials such as stainless steel and carbon steel, known for their strength and resistance to corrosion. At NTVAL, this makes the valves highly durable and suitable for use in harsh environments where they may be exposed to chemicals, extreme temperatures, or high pressures.

Benefits of Nozzle Check Valves

Long-Term Reliability

The high-quality materials and strong construction of nozzle check valves contribute to their long-term reliability. They can withstand demanding conditions and continue to perform effectively over time. This durability reduces the need for frequent replacements, saving on maintenance costs. The reliable performance of these valves ensures that systems operate smoothly and without interruption.

Cost Efficiency

The efficient design of nozzle check valves helps maintain a steady flow rate, which can lead to energy savings in the system. By reducing pressure loss and preventing backflow, these valves enhance the overall efficiency of the system. This efficiency translates to cost savings, as the system requires less energy to operate. Additionally, the long service life of these valves means fewer replacements and lower maintenance expenses.

Enhanced Safety

Nozzle check valves provide an important safety feature by preventing backflow, which can cause significant damage to a system. For instance, the quick-closing mechanism helps protect the equipment and maintain the integrity of the system. This added safety feature is crucial for applications where maintaining consistent flow and preventing reverse flow is essential.

Applications of Nozzle Check Valves

Steam and Boiling Systems

In steam and boiling systems, nozzle check valves are crucial for preventing backflow that could damage boilers and other equipment. These valves are used in steam pipelines to maintain a one-way flow, thus protecting the system from potential pressure surges. NTVAL recommends that their high-temperature tolerance and reliability are key benefits in these demanding applications.

Petrochemical Industry

In the petrochemical industry, nozzle check valves play a critical role in maintaining safe and efficient operations. These valves are used to prevent backflow in pipelines transporting various chemicals and hydrocarbons. What’s even better is by automatically closing when the flow stops, they protect sensitive equipment from damage and contamination.

Water and Sewage Systems

Nozzle check valves are essential components in water and sewage systems, where they help manage the flow of liquids and prevent contamination. They are commonly installed in pipelines to stop the reverse flow of sewage or treated water, which can cause significant system disruptions. These valves operate automatically, closing when the flow direction changes, thus maintaining system integrity.
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3 Considerations When Buying a Nozzle Check Valve

01

Quick Response and Short Stroke Length

When evaluating nozzle check valves, consider their response time and stroke length. For instance, valves with shorter stroke lengths and rapid closing mechanisms are better suited to preventing issues like water hammer, which can occur when fluid flow is suddenly stopped. This fast action protects pumps, compressors, and other equipment from wear and tear.

02

Efficient Design and Sealing Mechanism

It’s also important to assess the aerodynamic design and sealing mechanism when choosing a nozzle check valve. Valves that minimize pressure loss help maintain efficient fluid flow, reducing energy costs and preserving system performance. Additionally, a metal-to-metal seat provides a durable and reliable seal, ensuring the valve can handle demanding conditions over time.

03

Correct Size and End Connections

The size of the nozzle check valve and its end connections must match the piping system it will be installed in. Valves come in various sizes, typically ranging from 2 inches to 24 inches in diameter. NTVAL suggests that correct sizing and valve end connections are vital for seamless integration and optimal performance of the valve within the system.

Frequently Asked Questions

There is no minimum order quantity for nozzle check valves; even a single valve order is acceptable.
Typically, a quotation for nozzle check valves is provided within 2 days of receiving an inquiry.
Yes. At NTVAL, datasheets are provided along with quotations for nozzle check valves to give detailed specifications and performance data.
The lead time for nozzle check valve orders depends on the valve size and quantity, with production typically taking around 5-8 weeks.

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