Pressure Regulators for bottled gases DIN EN ISO 2503
Single-stage pressure regulators for bottled gas serve to regulate compressed, liquefied and under pressure dissolved gases out of bottles with a maximal pre-pressure of 200bar up to the desired working pressure, and in fact as independent of pre-pressure or issue quantity fluctuations as possible. Dependency upon pre-pressure is about 1,5% at single-stage pressure regulators, so while deflating the bottle it has to be readjusted from time to time.
Two-stage pressure regulators for bottled gas only have a dependency upon pre-pressure of 0,05%, so readjusting at pre-pressure fluctuations (deflating bottle at compressed gases) is not necessary.
Pressure regulators with volume meter Single- and two-stage have instead of the pressure gauge for outlet pressure either a so called litre-gauge or a rotameter. The litre-gauge shows, in connection with a capillary in the outlet, according to a certain dynamic pressure, the flow rate. The regulation is done by the normal pressure adjustment. The rotameter is calibrated to a fixed pressure (e.g. 3,5 up to 4 bar). Therefore regulation is done by a shut-off valve.
Extraction Point Pressure Regulators
Extraction point pressure regulators serve to regulate compressed, liquefied and under pressure dissolved gases from supply grids (ring conducting) with a certain pre-pressure to the desired working pressure, in fact as independent of prepressure or issue quantity fluctuations as possible. Their composition is analog to the singlestage pressure regulators, but because of the relatively low, known pre-pressure, they don't have a pre-pressure gauge and no safety valve. The high flow rates allow operation of all welding- and cutting torches for acetylene-oxygen, offered by company ewo.Single-stage pressure regulators for bottled gas
Bottle-connection on left side – Bottle pre-pressure 200 bar
Single-stage pressure regulators for bottled gas with volume meter
Bottle-connection on left side – Bottle pre-pressure 200 bar
Single-stage pressure regulators for bottled gas with 300 bar pre-pressure
Star-regulator
Bottle-connection on left side – Bottle pre-pressure 200 bar
Safety Installations EN730 ISO5175
Safety installations against flame penetration and gas backdraft for acetylene and oxygen are necessary, if the torches are not immune from sustained backfire or the consumer (torch) are not in the same room.
Connections / Detachable Hose Tails (autogenous) EN 560 (DIN 8542)
Quick-release couplings according
Quick-release couplings for acetylene and oxygen for connection of normal hoses to pressure regulator or torch, as well as to hose extension, are distinctive concerning the sort of gas, and ideal where torches have to be changed oftenly or hoses in various lengths are needed. They can be used with other fabricates.
Detachable Hose Tails consist of union nut with RH- or LH-threads according to DIN-ISO 228 and hose clips with ball nipple seal for metallic sealing to threaded
connector end with 45° cone like e.g. to pressure regulators for bottled gases or hand grips for torches. The union nut normally is detachable (Form A), at a few versions – small thread – not detachable (Form B).
Double nipples according to EN 560 for connection of devices of the compressed air conditioning and welding technique etc.
Hose breakage protection with DIN-DVGW-Reg.-No.
Hose breakage protections avoid that liquid gas escapes from damaged hoses, which can become a big risk of accident, as it accumulates in corners and deepenings and can develop into an explosive gas-air-mixture.
The hose breakage protection is to be installed in front of a hose leading and is operated with liquid gas in gasiform phase and regulated, variable resp. firmly adjusted pressure. It is downstream of the propane regulator or combined with it.
Please note the following points:
- For nominal rates of flow above 6kg/h the hose with 6mm light hose width has to be used. For nominal rates of flow under 6kg/h the hose with light width of 4mm can be used.
- No profile narrowing armatures, e.g. valves should be installed between the hose breakage protection and the working device.
- Press strongly while opening above the pressure point.
Pressure Gauges
Pressure gauges are safety pressure gauges according to EN 562 (DIN 8549). At a spring breakage a relief opening at the rearside is opened in order to avoid parts being thrown forward. Quality class 2,5.