This appraisal is for BETTA standard spring hydrants and swab version spring hydrants, where the supports that house the helical compression spring and dome can be removed to allow for direct full-bore access to the pipeline for insertion/removal of swabs.
This Issue 5 is a replacement for the previous version of the appraisal which had reached its 5-year expiry date. Betta has declared there have been no design changes to the products.
The DN 80 Betta spring hydrant valves are flanged to AS 4087 Fig B5, DN 80 or DN 100.