We are a technology and innovation-oriented professional valve manufacturer.

Our products adopt advanced domestic and international manufacturing technologies, and are strictly implemented in accordance with international advanced standards such as ANSI, API, DIN, BS, JIS and national GB standards. Our main products include butterfly valves, gate valves, globe valves, ball valves, check valves, strainers and other related products.

About Us

NAITELONG Valve Technology Co., Ltd. is a professional valve manufacturer integrating R&D, production, sales, and service. Its main products include butterfly, gate, globe, ball, check valves, and filters, widely used in water conservancy, power, petroleum, chemical, metallurgy, shipbuilding, and pharmaceutical industries. The company follows ANSI, API, DIN, BS, JIS, and GB standards, with products covering DN15–DN2000 and 1.0–10 MPa. It holds ISO9001, ISO14001, API, CE, TS certificates, 18 utility model patents, and has been recognized as a high-tech enterprise.

1997

Founded in
10000

Plant Area(㎡）
100+

Number of Existing Employees
30+

Invention Patents
50+

Honors&Certifications
500+

Served Clients

Product Information

Adhering to an international design philosophy, the company introduces advanced foreign design and manufacturing technologies. It has developed products such as ball valves, gate valves, globe valves, check valves, butterfly valves and control valves that comply with standards including ASME, ANSI, API, EN, GB, JIS, DIN and ISO.

Gate Valve Series

Low fluid resistance, small opening and closing torque, and easy operation. Since the movement direction of the gate plate during opening and closing is perpendicular to the medium flow direction, gate valves require less opening/closing force compared with globe valves. The medium flow direction is unrestricted. It will not disturb the flow nor reduce medium pressure drop, and the medium can flow freely from either side of the valve, achieving full opening and closing performance. It is more suitable for pipelines where the medium flow direction may reverse.

Globe Valve Series

1. Compared with gate valves, globe valves feature a simpler structure and are easier to manufacture and maintain. 2. The sealing surface is not easily worn or scratched. When closed, there is no relative sliding between the disc and valve body sealing surface, so wear and abrasion are minimal. It delivers excellent sealing performance and long service life. 3. When fully closed, the disc travel stroke is short. Therefore, the overall height of a globe valve is smaller than that of a gate valve, while its structural length is longer.

Check Valve Series

A check valve is an automatic valve that opens and closes automatically by relying on the flow of the medium itself to prevent medium backflow. It is also known as non-return valve, one-way valve, reflux valve and back pressure valve. As an automatic type of valve, its main functions are to prevent medium reverse flow, protect pumps and drive motors from reverse rotation, and avoid medium container discharge.

Ball Valve Series

Low fluid resistance; full-bore ball valves create almost no flow resistance. It features tight and reliable sealing with two sealing surfaces. The sealing seat materials use a wide range of engineering plastics for excellent sealing performance, achieving complete tight shut-off, and are also widely applied in vacuum systems. Simple operation with fast opening and closing: only a 90° rotation from fully open to fully closed, making it suitable for remote long-distance control.

Butterfly Valve Series

A butterfly valve uses a disc-shaped flap that rotates approximately 90° to open, close, or regulate medium flow. It features a simple structure, compact size, light weight, low material consumption, small installation dimension, low driving torque, easy and quick operation. Additionally, it delivers excellent flow regulation performance and reliable shut-off sealing capability.

Strainer Series

Efficient & Precise Filtration: Adopting special screen filtration technology, it delivers sensitive and accurate performance. Only particles smaller than the specified particle size are allowed into the system, making it a highly effective filtration solution. Available specifications include 5μm, 10μm, 20μm, 55μm, 100μm, 130μm, 200μm and more. Users can select filter screens of different precision grades according to actual working requirements, while the system flow rate can also be adjusted flexibly on demand.

American Standard Valve Series

American standard valves are mainly manufactured and inspected in accordance with API and ASME specifications and American national standards. As core control components in fluid transmission systems, they have functions such as shut-off, throttling, diversion, backflow prevention, pressure stabilization, pressure reduction and overflow pressure relief. These valves are suitable for various fluid media including air, water, steam, corrosive media, slurry, oil products, liquid metals and radioactive substances.

Control Valve Series

In the automatic control system of modern chemical plants, control valves play a vital role. The production operation of these plants relies on the precise distribution and regulation of flowing media. Whether it is energy exchange, pressure reduction, or simple vessel charging, these control processes must be completed by means of final control elements. The control valve functions as a variable resistance component within the pipeline system.

Flourind Lined Valve Series

Forged Steel Valve Series

Compared with other valve products, forged steel valves feature excellent resistance to high temperature and high pressure, with a unique self-sealing design. The higher the pressure, the more reliable the sealing performance. Thanks to their technical characteristics and applicable working conditions, forged steel valves possess irreplaceable advantages over other types of valves. Our product range includes forged steel check valves, forged steel gate valves, forged steel ball valves, forged steel globe valves, self-sealing gate valves, self-sealing globe valves, self-sealing check valves, forged steel needle valves, forged steel thermal insulation valves, high-pressure thin gate valves, etc.

Wafer Threaded Valve Series

It features simple structure, compact size and light weight. With reliable and tight sealing performance, the sealing materials of ball valves widely adopt engineering plastics, delivering excellent sealing property, and are also extensively applied in vacuum systems. This valve is easy to operate with quick opening and closing. It is also convenient for maintenance, disassembly and replacement.

Other Valves

6 Reasons to Choose China Naitelong Valves Among Numerous Valve Manufacturers

Advanced Equipment

Stable Quality

Excellent Reputation

Fast Delivery

Competitive Pricing

Premium Service

Maintenance & Repair Service

For imported valve inspection and maintenance, our work is undertaken by engineers and technicians with over 20 years of professional experience in imported valve repair and commissioning.

Valve Repair
Valve Fault Diagnosis
Valve Maintenance Technical Consultation
Valve Maintenance & Repair Training

We are not only a professional valve manufacturer, but also a professional technical service provider for valve maintenance. We offer repair services for all types of control valves (regulating valves), ball valves, gate valves, globe valves, high-pressure valves, cryogenic valves, etc., covering over 40 well-known international valve brands from more than 11 countries. With years of professional maintenance experience, we have accumulated massive imported valve technical data, built a complete spare parts procurement and processing capacity for all kinds of imported valves. We provide professional on-site emergency repair, sealing refurbishment and spare parts replacement services for customers. Our maintenance business covers industries including petrochemical, natural gas, water treatment, paper making, metallurgy, coal chemical and electric power. We provide professional on-site repair for regulating valves, gate valves, globe valves and butterfly valves, as well as customized special valve maintenance solutions for all sectors.

NEWS

2020 China Valve Industry Export Status & Analysis

Addressing Industry Pain Points: Sci-Tech Innovation Drives Leapfrog Development in Valve Sector

In recent years, with the rapid development of industries such as food processing and pharmaceuticals, market demand for valve products has surged, driving the rapid growth of the valve industry. At present, China’s food-grade valve portfolio is rich and diverse. Butterfly valves, diverter valves, control valves and other types are widely used for precise regulation of liquid, gas and other media, keeping process parameters such as pressure, flow rate and liquid level at set values. These valves are extensively applied in the food and beverage, pharmaceutical, chemical and other sectors.

40 Years: How China Became a Global Steel Pipe Powerhouse

Over the 40 years of reform and opening-up, China’s steel pipe industry has grown from scratch and expanded from small scale to large scale, achieving rapid development and remarkable accomplishments. Since 2012, China’s steel pipe output has accounted for more than half of global total production. In 2017, the output increased 64 times compared with 1978, making China a veritable major steel pipe manufacturing country. Meanwhile, China’s steel pipe manufacturing equipment level, product specifications range and technical content are all approaching world-class advanced standards.

Global Valve Market to See Steady 7.0% CAGR

Transparency Market Research (TMR) has recently released a comprehensive market research report analyzing the full dynamics of the global industrial valve market. The report states that the global valve market size reached approximately USD 60.9061 billion in 2016. Analysts forecast that the market will register a steady Compound Annual Growth Rate (CAGR) of 7.0% over the 2018–2026 forecast period.

Product Center

Gate Valve Series Globe Valve Series Check Valve Series Ball Valve Series Butterfly Valve Series Strainer Series American Standard Valve Series Control Valve Series Flourind Lined Valve Series Forged Steel Valve Series Wafer Threaded Valve Series Other Valves

Address：No.8, Zijing Road, Shacheng Street, Longwan District,Wenzhou City, Zhejiang Province, China

E-mail：nls@cnnlsv.com

Website：/

QQ：1072435832

Phone：13091988333

Contact：Mr.Yang

Helpline

0577-85820999

Fax:0577-85800558

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