Diaphragm Valve Manufacturer

NTGD Diaphragm Valve, Your Diaphragm valve Manufacturer of Proven Quality & Trustworthy Service

Diaphragm Valve Manufacturer Based in China


NTGD diaphragm valve is an ISO 9001 certified company located in NTGD industrial zone, Wenzhou city, China. It was established by a team of experienced engineer in 1999. Since then, NTGD dedicated to manufacture top quality diaphragm valve, including manual diaphragm valve, pneumatic diaphragm valve, lined diaphragm, sanitary diaphragm valve and so on.

Manual Diaphragm Valve

Wire Type Diaphragm valve | Straight Through Diaphragm valve

Actuated Diaphragm Valve

Pneumatic Diaphragm valve | Motorized Diaphragm valve

Lined Diaphragm Valve

Rubber Diaphragm Valve | PTFE Lined Diaphragm valve

Sanitary Diaphragm Valve

Pneumatic Sanitary Diaphragm valve | U Type diaphragm Valve

Ask Us About Our Diaphragm Valve

At NTGD Diaphragm Valve, we manufacture variety of diaphragm valve. Request a free quote from us today!

Industries That We Serve

Diaphragm valves are manufactured to be used in certain low-pressure applications where other valves are not very useful. They also offer smooth and streamlined fluid passage with very low-pressure drop. In addition, they show a good leak-proof characteristic even for fluids with suspended solids. These characteristics help the valve to be used in:

  • Food processing units, Pharmaceutical industry, Brewing.
  • Applications where a corrosive medium is present.
  • For clean and dirty water and air services.
  • For vacuum services, etc.

Never Compromised on Quality

NTGD diaphragm valve always put the quality in first. The diaphragm valve manufacturer focus on  details to ensure top quality valve. Our staffs are well-trained and we never compromise on quality.

NTGD equipped with many test machine and applied test for the material: PMI, hardness test, thickness test, Magnet test, Penetrate test, Ultrasonic test, Tensile test and so on.

Our Mission

NTGD diaphragm valve aim to be your diaphragm valve expert of proven quality and trustworthy diaphragm valve manufacturer, we continuously improve our technology and equipment to ensure us a main player in the diaphragm valve manufacturing. NTGD always try our best to manufacture reliable, affordable diaphragm valve  as well as satisfied customer service. We hope diaphragm valve connect the pipe as well as long term relationship between us.


As long as we estblish NTGD diaphragm valve, we applied for ISO 9001 certificate to establish our quality system. We have been certified for more than 20 year span. 

These years NTGD diaphragm valve get certified by ISO 45001 and ISO 14001. These management systme help us continuously improve quality. 

What is a diaphragm valve

Diaphragm valves are a little different in design from other types of industrial valves. There is no valve disc present in this type of valve. Instead, diaphragm valve manufacturers use a diaphragm to open and close the valve.

The diaphragm is attached to the compressor by a stud that is molded into the diaphragm. The valve stem pushes up and down the compressor, and thus if the compressor is lifted, the diaphragm will be raised as well. A diaphragm valve is a linear motion valve and can be used in both directions or is bi-directional in nature.

How does diaphragm valve works

The working principle of diaphragm valve is to use the valve stem to press the elastomer film tightly on the valve seat to block the gas path. Turning the hand wheel can drive the valve stem to move up and down to make the diaphragm leave the valve seat to open the valve or press the diaphragm tightly on the valve seat to close the valve. If diaphragm valve manufacturers use the NBR diaphragm in this valve, it is suitable for non corrosive gas on the front stage and pre pumping pipeline and at – 25 ~ 80 ℃. If fluororubber diaphragm is used, it is manufactured to be used in high vacuum system, and the temperature range is – 30 ~ 150 ℃.

Diaphragm valve manufactured with corrosion-resistant lining of the valve body and corrosion-resistant diaphragm instead of spool components, the use of diaphragm movement to play a regulatory role. The valve body of diaphragm valve is manufactured of cast iron, cast steel or cast stainless steel, and lined with various corrosion-resistant or wear-resistant materials. Diaphragm materials are rubber and polytetrafluoroethylene. The lining diaphragm has strong corrosion resistance and is suitable for the adjustment of strong corrosive media such as strong acid and strong alkali.

The most outstanding feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, disc and other parts above the diaphragm are free from medium corrosion, and the packing sealing structure is omitted, and the medium leakage will not occur.

  • The diaphragm manufactured of rubber or plastic has good sealing performance. As the diaphragm is a vulnerable part, it should be replaced regularly according to the characteristics of the medium.
  • Limited by diaphragm material, diaphragm valve is suitable for low pressure and relatively low temperature.
  • Diaphragm valve can be divided into three types according to its structure

Diaphragm valve manufacturer offer six types of diaphragm valves, including house diaphragm valve, direct current diaphragm valve, stop diaphragm valve, straight through diaphragm valve, gate diaphragm valve and right angle diaphragm valve.

Top 5 Diaphragm Valve Manufacturer

Company: Gemu
Busines type: Industrial Valve and Diaphragm Valve Manufacturer
Adress: Fritz-Müller-Straße 6-8 74653 Ingelfingen-Criesbach
Phone: +49-79 40 – 123 0
Products: Buttefly valve, Control valve, Fitting & tubes, Ball Valve, Solenoid Valve, Diaphragm valve, Check valve and etc.
Applications: Pharma, Food, Biotech, Industry, Industry, Medical

Busines type: Diaphragm Valve Manufacturer
Adress: 4526 Research Forest Drive, Suite 400 The Woodlands, Texas 77381 U.S.A
Phone: +1 936 271 6500
Products: Diaphragm Valve.
Applications: a leading global supplier of aseptic diaphragm valve flow solutions to the Life Science industries.

Company: Nippon Daiya Valve
Busines type: Diaphragm Valve Manufacturer
Adress: 1-3-22, Hiromachi, Shinagawa-ku, Tokyo, Japan Postal Code:140-0005
Products: Diaphragm Valve, Ball Valve, Butterfly Valve, Sanitary Valve.
Applications: medical, chemical, semiconductor, iron and steel manufacturing sectors and other industries, to nuclear and thermal power generation, water and sewer services, waste treatment and disposal, and other public sectors

Company: Alfa Laval Corporate AB
Busines type: Diaphragm Valve Manufacturer
Adress: Rudeboksvägen 1SE-226 55 LundSweden
Phone: +46 46 36 65 00
Products: Ball Valve, Butterfly Valve, Diaphragm Valve, Control Valve.
Applications: food, energy, the environment, engineering, pharmaceuticals, refineries or petrochemicals

Company: Georg Fischer
Busines type: Diaphragm Valve Manufacturer
Adress: June 3, 1802, Schaffhausen, Switzerland
Products: Butterfly Valves, Distribution Valve, Filters, Pressure Reducing Valves, Safety Valves.
Applications: Chemical Process, Energy, Food & Beverage, Marine, Water Treatment