VB17
3Pages

Catalog excerpts

ADCA VACUUM BREAKERS VB17 DESCRIPTION The VB17 is a series of vacuum breakers designed to automatically relieve or “break” an unwanted vacuum condition. Applications include venting and vacuum limiting in pipelines, vessels, heat exchangers, autoclaves, steam boilers and other machines. These valves should not be used as vacuum control valves. The device is kept close by means of a spring-loaded valve and the pressure which acts on the underside of the plug. When pressure drops below the adjusted set pressure, unbalancing of forces causes the valve to open, allowing atmospheric air to enter the system. With raise in differential pressure results an increase in valve stroke and air flow. The units are available with an optional lift indicator to signal in case of opening, for monitoring or contamination detection purposes. MAIN FEATURES Metallic wetted parts machined from 316L stainless steel bar stock. Regulating ranges from -0,05 to -0,95 bar. Compact design with easy access for cleaning and inspection. Lift indicator. Different soft sealings for vapours and gases. Degreasing. Other construction materials. Steam and other vapours and gases compatible with the construction. AVAILABLE MODELS: Male threaded ISO 228 G or NPT. Flanged EN 1092-1 PN 16 (threaded flange). Flanged ASME B16.5 Class 150 (threaded flange). CAPACITY CHART Vertical installation. See IMI – Installation instructions. * Values shown refer to the differential pressure between atmospheric pressure and the actual pressure inside the system. CE MARKING – GROUP 2 (PED – European Directive) PN 16 LIMITING CONDITIONS * Maximum operating pressure Max. operating pressure (steam) Maximum operating temperature ** Minimum operating temperature -60 ºC * Other limits on request. ** See “Ordering Codes” table for restrictions. VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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Optional lift indicator Spring guide * Plug seal Plug disc Spring cover * Proximity sensor * Available spare parts. VALSTEAM ADCA We reserve the right to change the design and material of this product without notice.

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ADCA ORDERING CODES VB17 Valve model VB17 – Vacuum breakers Material AISI 316L / 1.4404 Regulating range 0,05 to 0,25 bar (available in sizes 1/2" and 3/4") EPDM – Tmin -40 ºC / Tmax 150 ºC PTFE – Tmin -60 ºC / Tmax 180 ºC FPM / Viton – Tmin -10 ºC / Tmax 200 ºC Special features None None Lift indicator a) Male threaded NPT ASME B1.20.1 Flanged EN 1092-1 PN40 (threaded flange) Flanged ASME B16.5 Class 150 (threaded flange) Size 1/2" or DN 15 50 Special construction / Additional options E Full description or additional codes have to be added in case of non-standard combination a) 3 wire PNP...

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VB17 3Pages

Catalog excerpts

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VB17
3Pages