AS 4032.4 pdf download – Water supply—Valves for the control of heated water supply temperatures Part 4: Thermostatically controlled taps for the control of heated water supply temperatures
For the purpose of this Standard, the definitions in AS/NZS 3500.0 and those below apply.1.4.1Cyclic actuator
A device capable of activating the product under test through the cycles of movementsspecified in this Standard, to simulate normal usage over a relatively short period of time.1.4.2Dynamic pressure ratio
The ratio at the hot and cold inlets of the higher to the lower dynamic pressures under flowconditions.
An essential feature and an integral part of a thermostatic mixing tap，which permits theuser to adjust the temperature of the mixed water to suit personal needs.
1.4.4 Thermal shut-off (sudden failure of the cold or heated water supply)
An operating safety feature wherein, if a thermostatic mixing tap is subjected to the shut-offof the cold or heated water supply to it, the risk of scalding or cold shock to the user orperson(s) exposed to the mixed water is minimized.
1.4.5 Thermostatic mixing tap
A tap into which hot and cold water entering through separate ports are mixed in a chamberand then delivered through a single common outlet，the temperature of the mixed waterbeing automatically controlled at a user-adjustable temperature that is suitable for directcontact with the skin and which gives the user the ability to shut-off the outlet flow.
l A product with multiple outlets selected by an integral diverter valve is considered to have asingle outlet.
2 The product may also deliver cold water without mixing.1.4.6Water volume control
A device that may be used to control the rate of discharge of the mixed water. It is anintegral part of an end-of-line valve or connected to the outlet for an in-line valve,andwhich may incorporate a temperature control valve.
1.5 PRODUCT DATA
The product data shall be supplied with the tap and be readily available from themanufacturer or agent and shall comprise the following:
(a)General information that includes—
(i)minimum and maximum specified dynamic pressures at the inlets,in kPa;(ii) minimum and maximum permitted operating temperatures of the inlet hot and
cold water, in C;
(iii) minimum and maximum temperature settings of the mixed water, in °C;
(iv) maximum dynamic pressure ratio;
(v) whether provided with integral isolating taps; and
(vi) details of any other relevant data.
(b) Specified values, with equal dynamic pressures (dynamic pressure ratio equal to or less than 1.1:1), for the minimum and maximum—
(i) dynamic pressures at the inlets, in kPa; and
(ii) flow rates at the outlet, in L/min, together with the pressure requirements for each when producing mixed water at the required temperature, as specified in
Clause 4.12.1 or Clause 4.12.2, as applicable.
(c) The overall block dimensions and the type (e.g. surface mounted or concealed).
(d) Details of the end connectors.
(e) The factory pre-set maximum temperature.
Products complying with this Standard shall be marked with the following information:
(a) Manufacturer’s name, trademark or symbol.
(b) Name or model number of the product.
(c) Identification for traceability in the form of either—
(i) batch identification; or
(ii) individual serial number.
(d) Certification mark.
2.1 sCOPE OF SECTION
This Section specifies requirements for the materials for taps and component parts ofthermostatic taps.
2.2CORROSION-RESISTANT METALLIC MATERIALS
The parts of the thermostatic taps in contact with water shall be made from corrosion-resistant materials. For the purpose of this Standard, the following materials are deemed tobe corrosion-resistant:
(a)Copper, as specified in Clause 2.3.
(b)Copper alloy, as specified in Clauses 2.4 and 2.5.(c)Stainless steel, as specified in Clause 2.6.
(d)Material for springs, as specified in Clause 2.8(c).(e)Other materials, as specified in Clause 2.8.
Copper shall comply with the following:(a) Wrought products—AS 2738.
(b)Tubular components—Copper pipe shall comply with AS 1432 or NZS 3501.2.4 COPPER ALLOY
Copper alloy shall comply with the following:
(a)Castings—AS 1565 and have a lead content of not greater than 4.5%.(b)Hot pressing——AS/NZS 1568.
(c)Rod for machined parts——AS/NZS 1567.
(d)Tubular components—Copper alloy pipe shall comply with AS 1572 alloy,
designation C 26130. Where bent or stamped in the fabrication process, the pipe shallbe sufficiently stress-relieved，so that it is capable of passing the mercurous nitratetest specified in AS 2136 after all fabrication processes are completed.
NOTE:AS 2136 requires that the entire pipe component be tested before any coating orplating operation.