Check valves are extremely simple devices yet they serve an important purpose in many pneumatic circuits.  Generally used in systems where back flow is not permitted, check valves are two-port valves that allow free flow in one direction and block flow in the opposite direction.  They can also be used as a bypass valve, allowing media around components such as needle valves which restrict flow in both directions.

Pneumatic check valves rely on air flow to function and are designed with a specified cracking pressure, which is the minimum pressure required for the valve to operate. Because they are self-automated, pneumatic check valves do not require assistance to open or close and will continue to function without a manual operator, electricity or other external controls. Pneumatic check valves are commonly used in vacuum breakers, steam lines, cooling towers, HVAC system, sump pumps, pressure pumps, boilers and more.

Common uses for check valves include:
Industrial processes including fluid system in chemical and power plants
Aerospace applications including aircraft hydraulic systems
Applications where multiple gases are mixed into a single stream
Irrigation sprinklers and drip irrigation systems
Home heating systems
Rainwater harvesting systems connected to a main water supply
Pneumatic Check Valves for Flow and Bypass Applications

To meet the needs of your application, Pneumadyne manufactures a variety of Check Valves with threaded, barbed and push-to-connect ports.  Our durable valves feature cracking pressures of 0.1 and 0.5 psi to quickly allow flow through the output port.

Features:
Variety of porting options
Low cracking pressure
Electroless nickel plated for corrosion resistance
Durable brass construction
Compact inline or port mounting styles

Professional manufacturing and professional services, KUNAG creates more value for you
Continuously improving the quality of services and keeping improving, "sincere service" is the eternal theme of KUNAG. Kunag strictly complies with the requirements of ISO9001-2000 quality system certification, strictly controls the quality and responsibilities to the people to ensure the healthy operation of production, sales and service. To strengthen communication with customers and to provide our customers with quality products and perfect service, we hereby make the following commitments:
Product Standards
Products are designed, manufactured, and inspected strictly in accordance with China\'s GB, HG standards, and US API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
pre-sale service
Product introduction, technical communication, non-standard product design, troubleshooting.
Sale service
Trustworthy contracts, guarantee timely delivery, and keep in touch with customers at any time.
For special or complex products, our factory arranges technicians to train and guide users on product use, troubleshooting, tuning and maintenance.
After sales service
The warranty period of Weitong products is 12 months from the factory, and the "three guarantees" service (return, replacement, repair) is implemented.
During the use of our products, our factory regularly organizes technical and inspection personnel to visit and solicit user feedback on product quality, use conditions, and improvement opinions in order to further improve product quality.
Quickly respond to customer complaints about product quality problems, and after-sales service personnel rushed to the scene within 24-36 hours (48 hours outside the province).
For after-sales service, users are required to fill in the quality feedback form after the service and make appraisal opinions, while improving Guardian\'s service quality.

Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)

QQ: 2030185432

Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.

Contact: Peng gong
Q Q: 2030185432
Mobile: 18918462396(WeChat same number - 24 hours service)
Landline: 021-59718851
E-mail :kunage@126.com