QY347FAs the opening and closing device of oxygen pipeline in metallurgical industry, the worm gear oxygen flange ball valve has many strict requirements compared with other general valves. Because oxygen belongs to flammable and explosive dangerous goods, it is necessary to prevent leakage, static electricity and fire prevention to avoid accidents. In structure, the design is as follows: when the valve disc is opened and closed, the valve stem only rises and falls without rotation, which effectively reduces the wear of sealing pair, packing and upper seal; the side flange is equipped with grounding screw to avoid electrostatic spark; the exposed part of valve stem is sealed with plexiglass to prevent dust and oil.

QY347FMaterial and performance of main parts of worm gear oxygen flange ball valve

valve body	WCB	ZG1Cr18Ni9Ti	CF8	CF3	ZG1Cr18Ni12Mo2Ti	CF8M	CF3M
Ball stem	2Cr13	1Cr18Ni9Ti	304	304L	1Cr18Ni12Mo2Ti	316	316L
Valve seat	Polytetrafluoroethylene (PTFE) and Poe fiber reinforced polytetrafluoroethylene PTFE + glass p-phenylene ppl
shim	PTFE stainless steel / flexible graphite toothed gasket
Stem seat
filler	PTFE reinforced flexible graphite
Packing gland		1Cr18Ni9Ti	304	304L	1Cr18Ni12Mo2Ti	316	316L
temperature	-29～150(Polytetrafluoroethylene PTFE) - 29 ～ 200 (glass fiber reinforced polytetrafluoroethylene PTFE + glass) - 29 ～ 300 (PPL)
medium	Steam oil	Nitric acid		Strong oxidation medium	Nitric acid		ureas

QY347FAs the opening and closing device of oxygen pipeline in metallurgical industry, the worm gear oxygen flange ball valve has many strict requirements compared with other general valves. Because oxygen belongs to flammable and explosive dangerous goods, it is necessary to prevent leakage, static electricity and fire prevention to avoid accidents. In structure, the design is as follows: when the valve disc is opened and closed, the valve stem only rises and falls without rotation, which effectively reduces the wear of sealing pair, packing and upper seal; the side flange is equipped with grounding screw to avoid electrostatic spark; the exposed part of valve stem is sealed with plexiglass to prevent dust and oil.

QY347F-16PMain connection dimension and weight of worm gear oxygen flange ball valve PN16

Nominal diameterDN	15	20	25	32	40	50	65	80	100	125	150	200
L	130	140	150	165	180	200	220	250	280	320	360	400
H	59	63	75	85	95	107	140	152	178	252	272	342
W	130	130	160	180	230	230	400	400	650	1050	1050	1410
Wt（㎏）	2.5	3	5	6	7	10	15	19	33	58	93	160

 

QY347F-25PMain connection dimension and weight of worm gear oxygen flange ball valve PN25

Nominal diameterDN	15	20	25	32	40	50	65	80	100	125	150	200
L	130	140	150	165	180	200	220	250	320	400	400	550
H	59	63	75	97	107	142	152	178	252	272	342	345
W	130	130	160	230	230	400	400	700	1100	1100	1500	1500