Trusted Check Valve Manufacturer

NTVAL provides durable Check Valves designed to prevent backflow and maintain system integrity in industrial settings. Built for reliability and efficiency, our valves perform well in tough environments. Explore our range for dependable, high-performance solutions.

Reliable Check Valve

A check valve is a device that lets fluid flow in only one direction. It has two ports: one where the fluid enters and another where it exits. There are different types of check valves, like swing check valves, lift check valves, wafer dual plate check valves, tilting disc check valves, counter weight check valves, and angle check valves.
 
Check valves operate automatically, so they don’t need to be controlled by a person or external system. Most check valves don’t have a handle or stem.
Check Valve 1

Quality Control

Check Valve 2
The PMI test checks if the materials used in a check valve match the required specifications. It identifies the metal composition and confirms that the correct alloy is present for reliable operation.
PMI Test
Check Valve 3
The sealing test verifies that the check valve prevents any leakage under pressure. It tests how well the valve seals against fluids or gases, guaranteeing proper performance.
Sealing Test​
Check Valve 4
This test measures the emissions of the check valve. By checking the amount of leakage, it helps confirm the valve meets environmental and safety standards for emissions control.
Low Emission Test​
Check Valve 5
The impact test evaluates how well the check valve can handle sudden force. This test confirms that the valve can withstand strong impacts without breaking or cracking.
Impact Test​
Check Valve 6
During dimension inspection, technicians check the check valve’s measurements. The goal is to confirm it matches the specified design dimensions for proper fit and functionality in its application.
Dimension Inspection​
Check Valve 7
The painting thickness test examines how much coating is applied to the check valve. The paint protects the valve from corrosion, and this test checks even for adequate coverage.
Painting Thickness Test​
Check Valve 8
PT inspects the check valve for surface defects. It uses liquid dye to highlight tiny cracks or flaws that may not be visible to the eye, confirming the valve’s structural integrity.
PT
Check Valve 9
Material inspection confirms that the check valve’s materials meet the required standards. It assesses the quality of the materials to make sure they are durable and fit for long-term use.
Material Inspection​

Our Valve Applications in Key Industries

Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.
Check Valve 10
A check valve prevents backflow in the chemical processing industry, protecting equipment and maintaining a consistent flow of hazardous materials safely.
Chemical Processing
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In the petrochemical industry, check valves control the flow of liquids and gases. They stop contamination and maintain system efficiency, preventing costly damage.
Petrol Chemical
Check Valve 12
Check valves are vital in O.P.G. and nuclear industries to keep fluids moving in one direction, ensuring critical safety during operations.
O.P.G & Nuclear
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In the pulp industry, check valves help maintain steady flow and prevent blockages. They keep the production line running smoothly and efficiently.
Pulp
Check Valve 14
Check valves in the mining industry control water and slurry flow, preventing equipment damage and maintaining uninterrupted operations in harsh environments.
Mining
Check Valve 15
Check valves protect water and sewage systems by stopping backflow. They keep clean water separated from waste, maintaining system integrity and sanitation.
Water & Sewage
Check Valve 16
Check valves in steam systems control pressure and flow direction. They prevent steam from flowing backward, which helps maintain system stability and safety.
Steam System
Check Valve 17
Check valves help boiling systems by controlling water and steam flow. They prevent backflow, avoiding pressure buildup and ensuring system safety.
Boiling System

Get More Versatile Valve

Main Parameter

Main parameter of the Globe valve

ANSI Check valve

Class 150LB-2500LB SIZE 1/2″~48″

DIN Check valve

DN15-DN1000,PN16~PN250

JIS Check valve

DN15-DN100010K~40K

BS Check valve

DN15-DN1000,PN16~PN250

Design &Manufacture STD

BS1868, API6D, ASME B16.34, DIN3840/EN14341, ISO14313, API594, API602/ISO15761/BS5352, BS5160, JIS B2074, JIS B2084, JIS B2071

Face to Face STD

ASME B16.10, API594, EN558-1, DIN3202, BS2080, API6D, JIS B2002, GOST3706

End Connection STD

ASME B16.5, ASME B16.11, ASME B1.20.1, ASME B16.25, EN1092-1, DIN2501, DIN2543-2550, JISB2212-JISB2214, JIS2220 (Connection type: RF, FF, RTJ, BW, SW, NPT)

Test Standard

API598, API6D, JISB2003, ISO5208, BS 6755, DIN3230, EN12266-1

Check ValveMaterial

Carbon Steel: A216 WCB, WCC, WC1, ASTM A105
Stainless Steel: A351 F8 (F304), CF8M (F316), CF3 (F304L), CF3M (F316L), CF8C (F347), F321, F321H, CK20
Duplex Stainless Steel: A351 CN7M (B473), CD4MCu (F50), CK3MCuN (F44), CG8M, A890-1A, 4A, 5A, 6A, A182 F44, F50, F51, F53, F310
Low Temperature Steel: A352 LCB, LCC, LCA, LC3, A350 LF2, LF3
High Temperature Steel: A217 WC6, WC9, WC5, WC11, C5, C12, C12A, A182 F22, F11, F5, F9
Bronze, Nickel Aluminum Bronze (NAB), Gunmetal: B148 C95500, C95800, C95400, C83600, C92200, ASTM B62, B61, B150 C63200
Alloy Steel: Monel 400, Monel K500, Alloy 20, 904L, CN7M, Inconel, Hastelloy B & C, Titanium alloy
DIN Material: GS-C25/1.0619, 1.4408, 1.4308, C22.8

Check valve catalogue

Check Valve Catalogue (2.0Mb)
DIN Check Valves Calalogue(1.2Mb)

Type of Check Valves

Swing Check Valves, Lift Check Valves, Wafer Dual Plate Check Valves, Tilting Disc Check Valves, Counter Weight Check Valves, Angle Check Valves, Piston Check Valves, Ball Check Valves, Lug Check Valves, etc.

Design Features

Check Seat Design
For carbon steel check valves, the seat material is typically made from forged steel. The sealing surface of the seat is spray welded with a hard alloy selected by the customer. For check valves that are NPS ≤ 8, a renewable threaded seat is used, with an option for a welded-on seat.
 
For carbon steel gate valves that are NPS ≥ 10, a welded-on seat is standard. For stainless steel check valves, an integral seat is usually used, with the option to weld a hard alloy directly onto it. Threaded-in or welded-on seats are also available for stainless steel check valves if required.
Bolts And Nuts Design
For normal service conditions, ASTM A194 Class 2H and ASTM A193 Grade B7 nuts and stud bolts are provided. For high-temperature service conditions, ASTM A194 Class 4 and ASTM A193 Grade B16 nuts and stud bolts are supplied upon request.
 
The standard bolting for our Stainless Steel Valves includes ASTM A194 Class 8 and ASTM A193 Grade B8 nuts and stud bolts. NTVAL can provide specific bolting requested by the customer, ensuring compatibility with a wide range of operational environments.
End Connections Design

Our standard production includes valves with flange ends that feature Raised Face (RF), Flat Face (FF), or Ring Type Joint (RTJ), all conforming to B16.5 standards. We also offer butt-welding ends (BW) that meet B16.25 standards. All face-to-face and end-to-end dimensions conform to B16.10.

We can also supply special end connections based on the customer’s requirements. Additionally, customization options are available for specific applications, ensuring the valves meet precise operational needs. NTVAL is committed to providing flexible solutions to suit diverse industry demands.

Accessories/Optional Designs
Counterweight features are available as an accessory. Piston, tilting disc, or API-6D designs can also be provided to meet the customer’s specific operational needs. Drains, bypasses, and venting options are available according to the customer’s specifications.
Body-Cover Connection Design
The body and bonnet of Class 150 to Class 900 check valves are typically secured with studs and nuts. For Class 1500 to Class 2500 check valves, the body and bonnet usually feature a pressure seal design.
Body Design
The body is full ported and spherical in shape. The design incorporates large radiuses to minimize stress, flow resistance, and turbulence. Bosses are included for optional drains. This robust design ensures enhanced durability and improved flow efficiency in demanding applications.
Hinge Design
The hinge arm pivots on the hinge pin, which is positioned near the disc’s center of gravity. The body penetration for the hinge pin is sealed with a soft steel gasket and a flanged plug. The hinge arm is built to handle the shock load of quick closing, ensuring a longer lifespan and reliable shut-off. It also features an integral disc stop that provides a positive stop in the open position.
Disc Design
Each disc’s seating surface is precision ground and matched to the seat ring to ensure a positive shut-off. The disc is secured to the hinge arm with a disc nut and is pinned to prevent disengagement during operation. We can provide either integral or overlaid seat facings based on the customer’s request.
Body-Cover Gasket Design
Stainless steel and flexible graphite wound gaskets are used for Class 150LB and Class 300LB check valves. For Class 600# check valves, a stainless steel flexible graphite wound gasket is used. A ring-type joint gasket is used for Class 900 check valves. For Class 1500# and Class 2500# check valves, a pressure seal design is applied.

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Additional General Insights Here

Specs of Check Valve

Temperature Range

Check Valves are designed to operate within specific temperature ranges. They can typically handle temperatures from -20°F to 400°F. Some special materials can extend this range, making them suitable for extreme temperature conditions.

Connection Types

Check Valves are available with different connection types for easy integration into systems. Common connections include flanged, threaded, and welded ends. These connection types provide compatibility with various pipeline setups. Matter of fact, NTVAL offers a wide range of connection options to achieve seamless integration into your system.

Body Design

The body design of Check Valves varies to meet different system requirements. Common designs include wafer, full-body, and Y-pattern. Each design offers specific benefits, such as compact size for wafer designs or high flow efficiency for Y-pattern valves.

Features of Check Valve

One-Way Flow

Check Valves allow fluid to flow in only one direction. This feature prevents backflow, which can cause damage to pumps and other equipment. By maintaining a unidirectional flow, these valves protect the integrity of the entire system.

Compact Design

Many Check Valves feature a compact design, making them suitable for installations where space is limited. Their small footprint allows them to be used in a variety of settings without requiring significant modifications to existing pipelines.

Low Pressure Drop

Check Valves are designed for minimal pressure drop, ensuring efficient fluid flow and reduced energy consumption. This is vital for maintaining optimal performance in high-flow systems. NTVAL's Check Valves provide this efficiency, ensuring smooth system operation.

Benefits of Check Valve

System Protection

The one-way flow feature of Check Valves protects systems from backflow, which can cause equipment damage and system failures. This protection is vital for maintaining operational efficiency and reducing maintenance costs.

Space Efficiency

The compact design of Check Valves saves space in crowded or complex installations. This space efficiency is particularly beneficial in large projects where every inch of space counts, making installation easier and more flexible.

Energy Savings

Check Valves' low pressure drop ensures high flow efficiency and reduced energy consumption. This leads to significant cost savings over time. NTVAL's Check Valves are designed to optimize energy use in large-scale operations.

Applications of Check Valve

Petrochemical Industry

Check Valves are essential in the petrochemical industry for controlling the flow of various chemicals and by-products. They prevent backflow, which can cause contamination and equipment damage. These valves are designed to handle the high pressures and corrosive substances typically found in petrochemical processes.

Steam and Boiling Systems

In steam and boiling systems, backflow of steam and hot water can cause significant equipment damage and safety hazards. Fortunately, there’s a simple solution. Check Valves are designed to control the flow and prevent backflow. They operate efficiently under high temperatures and pressures, making them ideal for industrial boiling applications.

O.P.G. & Nuclear

In O.P.G. (Oil, Power, and Gas) and nuclear industries, Check Valves play a crucial role in maintaining safety and efficiency. They are used to prevent backflow in critical systems, maintaining the proper flow of fluids and gases. NTVAL’s Check Valves are built to withstand extreme conditions and high radiation environments.

Pulp and Paper Industry

In the pulp and paper industry, Check Valves are essential for handling liquids and slurries used in processing. They prevent backflow, which can lead to clogs and disrupt the production line. Their durability allows them to withstand the abrasive materials common in pulp processing, maintaining consistent flow with minimal maintenance.
Check Valve 24
Check Valve 25

4 Considerations When Buying Check Valve

01

Lifecycle Cost

When selecting a Check Valve, consider the total lifecycle cost, not just the initial purchase price. This includes maintenance, operational costs, and potential downtime. A higher initial investment in a durable, low-maintenance valve can result in long-term savings.

02

Response Time

Consider the response time of the Check Valve, especially in systems where rapid flow changes occur. An ideal response time is typically less than one second. Valves with quick response times can prevent pressure surges and protect sensitive equipment from damage.

03

Noise Levels

Check the noise levels produced by the valve during operation. Valves that operate quietly, ideally producing less than 85 decibels, are essential in applications where noise pollution must be minimized, such as in hospitals.

04

Valve Testing

When considering a Check Valve, it’s crucial to verify that it has undergone thorough testing for performance and safety. Here’s how it works, look for valves that come with test certificates, confirming they have passed pressure, leakage, and operational tests. Certification from bodies like API or ISO can indicate reliable testing standards. At NTVAL, we prioritize rigorous testing to deliver reliable and safe Check Valves for your systems.

Types of Check Valve

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