Stattin Stainless stocks a comprehensive range of Grade 304 and 316 tube fittings. This collection includes 45°, 90° and 180° LR bends, 90° SR bends, equal tees, unequal tees, concentric reducers, eccentric reducers, crosses, hosetails, sealing flanges, caps and spray balls. Sizes are 9.53mm, 12.7mm, 15.88mm, 19.05mm, 25.4mm, 31.75mm, 38.1mm, 50.8mm, 63.5mm, 76.2mm, 101.6mm, 127mm and 152.4mm.

50mmBackflow Preventer

AS 1528.1 specifies standard nominal thicknesses of 1.6mm for all ODs except 2.0mm for 203.2mm OD; other non-standard thicknesses can be specified by purchasers. The standard tolerance is +nil, -0.10mm. The all-minus tolerance recognises the usual practice for tube, to all specifications, to be produced towards the lower limit of the tolerance range. A range of between 1.52 and 1.58mm is typical. Slightly wider tolerances apply to the complimentary tube fittings covered by the other parts of AS 1528.

Watts009RPZ

Watts LF009M2 1 inch lead free free copper silicon alloy reduced pressure zone backflow preventer assembly is designed to prevent the flow of polluted water from entering into the potable water supply. This assembly consists of a lead free body, 1 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements.

Watts LF009M2 1 inch lead free free copper silicon alloy reduced pressure zone backflow preventer assembly is designed to prevent the flow of polluted water from entering into the potable water supply. This assembly consists of a lead free body, 1 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements.

Stainless SteelBackflow Preventer

• Dairy, Food, Beverage and Pharmaceutical - Tanks, Process Lines, Equipment, Filtration, Heat Exchangers, CIP Systems, Key Stations, Manifolds, Brine Lines, Chillers, Hoppers and much more.

AS1528.1 is by far the safest option … and the most cost-effective. It is specifically directed at food industry applications, specifying the features necessary to ensure high integrity lines for hygienic applications without requiring high cost additional mechanical testing. Batch traceability marking – considered essential to validate many food and pharmaceutical plants - is mandatory. Another key benefit is the existence of matching specifications for associated tube.

WattsBackflow preventer

This tube specification give limits for OD and Wall Thickness – the Inside Diameter is not separately specified, even although from the hygiene point of view there may be some logic in doing so.

AS1528.1 requires removal of the weld bead (except in the small sizes where the procedure is not possible). There is also a requirement that the internal surface be smooth, with no lack of weld penetration and no crevices adjacent to welds. This requirement addresses the heart of the issue - freedom from sites for product or bacterial build-up.

AS 1528.1 allows ovality of up to double the OD tolerance for all sizes. All the above specifications that allow extra ovality for thin wall tube still require the mean OD to be within their respective OD tolerances.

The aim of AS 1528.3 has been to standardize a hygienic tube fittings for use in dairy and other food and beverage manufacturing, that is effective in maintaining the required food safety standards and that is also readily available at a relatively economical price. The standards has been successful in these aims. It is also the only dimensionally integrated set of tube and fitting standards in the world.