VB14 and VB21 Vacuum Breakers Installation and …

VB14 and vb21 Vacuum BreakersInstallation and Maintenance InstructionsIM-P019-05ST Issue 20190150/2 Printed in the UK Copyright 2005 IFq 2 PFq 2 QFs RFg SFy TFw UF 2 VB14VB21IM-P019-05 ST Issue 22IF2q 2 2 Safe operation of the unit can only be guaranteed if it is properly installed,commissioned and maintained by a qualified person (see Section 11 of the attachedSupplementary Safety Information) in compliance with the operating instructions. Generalinstallation and safety instructions for pipeline and plant construction, as well as theproper use of tools and safety equipment must also be complied whether closing isolating valves will put any other part of the system or personnelat risk. Dangers might include; isolation of vents and protective devices or alarms. Ensureisolation valves are turned off in a gradual way to avoid system attempting any maintenance consider what is or may have been in the that any pressure is isolated and safely vented to atmospheric pressure beforeattempting to maintain the product, this is easily achieved by fitting Spirax Sarcodepressurisation valves type DV (see separate literature for details).

IM-P019-05 ST Issue 2 3 Air connection System connection Fig. 1 VB14 2.2 Sizes and pipe connections VB14 and VB21 ½" (system connection) screwed BSP or NPT 1/8" (air inlet connection) screwed BSP or NPT System connection Fig. 2 VB21 Air

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