ISO 10524-3:2019 Pressure regulators for use with med ical gases一 Part 3: Pressure regulators integrated with cylinder valves (VIPRs).
6.6.1.3 The casings of PRESSURE GAUGES shall be designed such that the pressure is safely relieved to prevent a hazardous overpressure that could lead to a rupture in the event of a leak within the gauge.
6.6.1.4 The pressure or content indication shall be legible to an operator having a visual acuity of 1 (corrected if necessary) 1 m from the gauge with an illuminance of 215 lx.
6.6.1.5 The scale of the cylinder PRESSURE GAUGE shall extend to at least 133 % of the NOMINAL INLET PRESSURE
The scale of the cylinder CONTENT INDICATORS shall extend to at least 133 % of the nominal cylinder content.
Check compliance with the requirements of 6.6.1 by inspection of the technical file.
6.7 FLOW SELECTOR
If the VIPR is fitted with a FLOW OUTLET(S) in accordance with 6.4.2.1, it shall also be fitted with a FLOW SELECTOR.
Check compliance by inspection of the technicalfile.
6.8 Filtration
Means shall be provided to prevent particles greater than 100 urn from entering the high-pressure side of the PRESSURE REGULATOR.
If a filter is fitted, it shall only be used in a position where flow is in one direction only, excluding the FILLING PORT which can be bi-directional.
Check compliance by inspection of the technical file.
6.9 MAIN SHUT-OFF
Means shall be provided to shut off the flow of gas from the cylinder. The MAIN SHUT-OFF shall comply with ISO 10297.
Check compliance by inspection of the technicalfile.
NOTE The applicable version of ISO 10297 can be referenced in regional, national or international regulations
e.g. ADRLJ21, UN Model Regulationsifli.
6.10 RESIDUAL PRESSURE DEVICE
A RESIDUAL PRESSURE DEVICE shall be fitted and shall be designed to retain a positive gas pressure within the cylinder, after use.
The RESIDUAL PRESSURE DEVICE shall meet the requirements of the relevant clauses of ISO 15996. Means shall be provided so that it is possible to vent the retained residual gas by use of a proprietary tool and to allow the cylinder to be purged or evacuated before filling.
Compliance shall be tested in accordance with the relevant clauses of iSO 15996 and gas-specific type tests given in 9.4.3.
6.11 *PRESSURE…RELIEF DEVICE
A PRESSURE-RELIEF DEVICE shall be provided as a component part of the VIPR.
The PRESSURE-RELIEF DEVICE shall be either pre-set or not adjustable without the use of a proprietary tool.ISO 10524-3 pdf download.