BS EN 417:2009 pdf download
BS EN 417:2009 pdf download.Non-refillable metallic gascartridges for liquefiedpetroleum gases, with orwithout a valve, for use withportable appliances -Construction, inspection,testing and marking.
4.3.3 Other pierceable type cartridges
Other capacities, dimensions and shapes of peerceable cartridges are permitted, provided Ihat they cannot be fitted
into and be pierced by appliances designed for type 200 cartridges.
4.4 CartrIdges with valves
4.4.1 Valve design
4.4.1.1 General requirements for every type of valve
Cartridges with valves shall be either:
a) of such a design that it is not possd,le to operate the valve without the use of a special adaptor b: or
NOTE The connection on the appliance with wtacli the gas cartridge is designed to be used may be considered as a special adaptor.
b) provided with adequate protection against inadvertent discharge
The valves shall be of such a design that, under conditions of normal use, they close when me special adaptor is
removed or the valve released. Valves which close by means of internal gas pressure only are not permitted. After 50 opening and closing operations, the valve shall not show signs of leakage or other defects (see 66)
The valve cup, if any, shall be tree from burrs and sharp edges.
4.4.1.2 CartrIdges fitted with threaded centre boss valve cups
4.4.1.2.1 The valve cup shall be made from carbon or alloy steel of suitable uniform quality, which may be coated, (e.g. hot-dipped tinpiafe).
4.4.1.2.2 The valve or closure shall be one of the following types:
— type 1: Female valve (see 3.12) mounted in a double layer, threaded centre boss valve cup;
— type 2: Male valve (see 3.13) mounted in a double layer, threaded centre boss valve cup:
— type 3: Female valve (see 3.12) mounted in a single layer, threaded centre boss valve cup (see annex A):
— type 4: Male valve (see 3.13) mounted in a single layer. threaded centre boss valve cup (see annex A).
NOTE For wishing to avoid a sudden change in the rule of operation of EN 417. the CEN’BTTF 14 decided that specifications related to single layer valves I type 3 and 4) be moved I an informative anner (annex A) and remain In force ckJring a transitional period of rive years after the fxiblication of the revised standard
4.4.1.2.3 The valve shall not break when a torque of 15 Nm is applied as indicated in 6.8.
4.4.1.3 Filled carhidges lifted with type I valves
Filled cartridges fitted with type 1 valves shall comply with the tollowing:
a) the valve cup component shall be manufactured from a double layer of material;
b) the thickness of the valve cup shall be between 0.30 mm and 0,57 mm;
NOTE Special attention is drawn to the matenal thckness at the root of the thread.
e) the raised portion shall be pierced with a circular hole of (3.45 ± 0.2) mm diameter, concentric with the major diameter of the thread (tolerance 0.15mm maximum), (see Figure 3);
I) the fiat surface of the boss surrounding the raised area shall be square to the central axis of the thread Ct 20);
g) the flat surface of the boss surrounding the raised area shall be not less than 0,9 mm and not more than 1,4 mm above the plane of the top surface of the ce. flm (see Figure 3) and shall be parallel to that plane (±2):
h) the upper surface(s) of the centre boss shall form the sealing surface(s) for an appliance screwed onto the valve;
i) the inner diameter of the swaged cup shall not be less than 23 mm and the outer diameter of the swaged cup shall not exceed 34 mm (See Figure 3). The inner and outer diameters of the swaged cup shall be concentric with the major diameter of the thread (tolerance : 0.3 mm maximum):
j) the horizontal clearance between the centre boss and the inner wall of the valve cup shall not be less than 5,8 mm and shall be maintained over a vertical distance of at least 8 mm below the plane of the flat surface of the centre boss surrounding the raised area (see Figure 3);
NOTE 1 The clearance cmensions beiween the maor diameter of the valve cup boss thread and the inner diameter of the valve cup Is a minimum dwnensaon br the valve c and a reberence dimension tot the maximum size of Ihe corresponding part of the apphance.
NOTE 2 his essential that any pail oh the appliance etiidi makes contact with the cartridge or cartridge vaNe flm during assembly does not interhere with the sale sealing process of the cartridge to the appliance.
