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Valves, Demand

Definition : Valves used in medical gas systems to control the flow of medical gases (such as oxygen or analgesics) according to the patient's demand, or need, for the medical gases. The medical gas flow is controlled by the patient's respiratory effort; the deeper the inhalation, the greater the demand for the medicinal gases and the greater the flow. During inspiration, a negative pressure is applied that opens the demand valve, thereby increasing flow of the medicinal gas. During exhalation, a positive pressure is applied that closes the demand valve and shuts off the gas supply. Demand valves are used in hospitals and most other healthcare facilities with patients who need assisted breathing. They can be hand-held, used with portable medical gas cylinders, or with a central gas supply line. Dedicated demand valves used with the supply of oxygen and for analgesic gases are also available.

Entry Terms : "Demand Valves" , "Medical Gas System Demand Valves"

UMDC code : 17169

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Allied Healthcare Products Inc

Company Type: Parent

Throughout our company's history we've challenged ourselves to develop products which affect the quality of human life in positive and lasting ways. We're proud to say that during the past 50+ years we've introduced a great variety of products contributing to the health or standard of living of our customers.

Cryofab Inc

Company Type: Parent

Cryofab, Inc. is a manufacturer and servicer of cryogenic equipment and accessories. Custom as well as standard fabrications depict the product mix. Customizing ability allows Cryofab to offer ASME, DOT, ANSI, IATA, TPED and PED products.

Event Medical Services Inc

Company Type: Parent

Flotec Inc

Company Type: Parent

Flotec, Inc. began business in June of 1983 for the purpose of manufacturing specialized fluid power connectors, diesel fuel fittings and valves, liquid oxygen valves, relief valves, fill-to- vent valves and quick-disconnect fittings.

GF Health Products Inc

Company Type: Parent

GF Health Products, Inc. is one of the world's leading manufacturers and distributors of medical products, with 300 US-based employees, marketing our internationally recognized brands within 84 countries.

Marquest Scientific Inc

Company Type: Parent

OriGen Biomedical Inc

Company Type: Parent

OriGen Biomedical, Inc. is a small, privately-held medical device manufacturer headquartered in Austin, Texas, USA. Our engineers have more than 25 years of experience with dozens of different specialty medical devices for cardiac care and cell culture.

Roscoe Medical Inc

Company Type: Parent

Specialty Gases of America

Company Type: Parent

American Gas Group is one of the largest independent specialty gas producers in North America and packages a variety of specialty gases including EPA Protocols, hydrocarbons, VOC mixtures, reactive mixtures, high-purity chemicals and research-grade gases in addition to industrial and medical gas products.

United States Plastic Corp

Company Type: Parent

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