节流装置、流量仪表、孔板、喷嘴-江阴暨阳仪表有限公司

Throttling device list for selection

Name	Model	Tappings	Diam	Pres.	Diam. ratioβ	Reynolds Re_D	Description	Standard/handbook	Supply form	Figure
standard orifice plate	LGBH	ring chamber tappings	50～400	≤32.0	0.2～0.75	≥5000(0.2≤β≤0.45) ≥10000(β≥0.45)	For all kinds of fluids, main suitable for power plant, textile, metallurgy, light industry,etc. use mainly 8 solt orifice plate under high temp. and pres.	ISO5167 GB/T2624-93 GD87-1101 HG/T21581-95	A,A1,A2 B,B1,B2,B3 C,D,E,T	Figure 1 Figure 2 Figure 3 Figure 4
	LGBZ	single drill tappings	400～3000	≤6.4		≥5000(0.2≤β≤0.45) ≥10000(β≥0.45)				Figure 5
	LGBF	flange tappings	50～3000	≤42.0		≥1260β²D	For all kinds of fluids, main suitable for petrochemical.			Figure 6 Figure 7
	LGBJ	D-D/2 tappings	50～3000	≤25.0		≥1260β²D	For all kinds of fluids, main suitable for metallurgy.			Figure 8
long radius nozzl	LGCJ	D-D/2 tappings	50～630	≤42.0	0.2～0.8	10⁴～10⁷	low pressure loss, long life, mainly used for main feedwater & main steam	ISO5167 GB/T2624-93 GD87-1101	F1,F2,W	Figure 9
ISA1932 nozzle	LGPH	ring chamber tappings	50～500	≤42.0	0.2～0.8	2×10³～10⁷	low pressure loss, long life, use mainly 8 solt nozzle under high temp. and pres..		A,A1,A2 C,D,E,T	Figure 10 Figure 11
ISA1932 nozzle	LGPZ	single drill tappings	50～500	≤42.0	0.2～0.8	2×10³～10⁷			A,A1,A2 C,D,E,T	Figure 10 Figure 11
rough molten venturi tube	LGXT	Special tappings	100～800	≤2.5	0.3～0.75	2× 10⁵～2×10⁶	lower pressure loss, mainly used for larger pipe, larger flow.	ISO5167 GB/T2624-93 HG/T21581-95	F1,F2,W
mechanical processed venturi tube	LGTT	Special tappings	50～250	≤42.0	0.4～0.75	2× 10⁵～2×10⁶	lower pressure loss, main suitable for high temp. and pres.		F1,F2,W	Figure 12
rough welding iron plate venturi tube	LGWT	Special tappings	200～5000	≤6.4	0.4～0.7	2× 10⁵～2×10⁶	lower pressure loss, mainly used for larger pipe, larger flow.		F1,F2,W	Figure 13
Venturi Nozzle	LGLT	Special tappings	65～500	≤6.4	0.316～0.775	1.5×10⁵ ～2×10⁶	lower pressure loss, mainly used for larger pipe, larger flow.		F1,F2,W	Figure 14
high pressure orifice plate with lens washer	LGGZ	single drill tappings	15～200	20～32	0.2～0.75	≥5000(0.2≤β≤0.45) ≥10000(β≥0.45)	main suitable for high pres., main suitable for petrochemical., refinery		A,A1,A2 C,D,E,T	Figure 15
Wide edge orifice plate	LGKZ	single drill tappings	50～400	≤25.0	0.2～0.75	≥5000(0.2≤β≤0.45) ≥10000(β≥0.45)	For all kinds of fluids, main suitable for petrochemical.		A,A1,A2 C,D,E,T	Figure 16
Ring orifice plate	LGHT	Special tappings	50～2500	≤42.0	0.2～0.8	4× 10³～1×10⁷	For dirty fluid such as coal gas, the fluid contained of sediment and suspension shall pass easily through orifice, not form accumulation in front of the orifice and affect measurment. Not suitable for vertical pipe.	Manufacturer standard	F1,F2,W	Figure 17
segmental orifice plate	LGQZ	single drill tappings	50～2000	≤25.0	0.1～0.8	10⁴～10⁶		BS1042 ISO/TR15377 HG/T21581-95	A,A1,A2 B,B1,B2,B3 C,D,E,T	Figure 18
	LGQJ	D-D/2 tapping
	LGQF	flange tappings
excenric orifice plate	LGOZ	single drill tappings	10～1000	≤25.0	0.46～0.84	2.5×10⁵β²～10⁶β (d≥50)	For dirty fluid such as coal gas, the fluid contained of sediment and suspension shall pass easily through orifice, not form accumulation in front of the orifice and affect measurment. Not suitable for vertical pipe.	BS1042 ISO/TR15377 HG/T21581-95	A,A1,A2 B,B1,B2,B3 C,D,E,T	Figure 19
	LGOJ	D-D/2 tapping
	LGOF	flange tappings
orifice(nozzle) without upstream or downstream pipe	LGDH	ring chamber tappings	50～400	≤6.4	0.2～0.75	≥5.5×10³	suitable for pipe inlet or outlet	ISO/TR15377 HG/T21581-95 flow handbook	A,A1,A2 C,D,E,T
orifice(nozzle) without upstream or downstream pipe	LGDZ	single drill tappings	400～3000	≤6.4	0.2～0.75	≥5.5×10³	suitable for pipe inlet or outlet	ISO/TR15377 HG/T21581-95 flow handbook	A,A1,A2 C,D,E,T
1/4 circle orifice plate (Nozzle)	LGEH	ring chamber tappings	50～500	≤25.0	0.245～0.6	≤10⁵β (d≥15)	For low Reynolds number, high viscosity fluid, suitable for fuel oil in plant.	BS1042 ISO/TR15377 HG/T21581-95	A,A1,A2 B,B1,B2,B3 C,D,E,T	Figure 20
	LGEZ	single drill tappings	25～500
	LGEF	flange tappings	40～500
Fastigiate entry orifice plate	LGRH	ring chamber tappings	50～500	≤25.0	0.1～0.316	80～2×10⁵β (d＞6)	For lower Reynolds number, suitable for fuel oil in plant	BS1042 ISO/TR15377	A,A1,A2 C,D,E,T	Figure 21
Fastigiate entry orifice plate	LGRZ	single drill tappings	25～500	≤25.0	0.1～0.316	80～2×10⁵β (d＞6)	For lower Reynolds number, suitable for fuel oil in plant	BS1042 ISO/TR15377	A,A1,A2 C,D,E,T	Figure 21
double-tier orifice plate	LGYH	ring chamber tappings	50～400	≤25.0	0.2～0.75	3×10³～3×10⁵	For lower Reynolds number	flow handbook HG/T21581-95	A,A1,A2 C,D,E,T
double-tier orifice plate	LGYZ	single drill tappings	25～400	≤25.0	0.2～0.75	3×10³～3×10⁵	For lower Reynolds number	flow handbook HG/T21581-95	A,A1,A2 C,D,E,T
small orifice plate	LGMH	ring chamber tappings	15～50	≤42.0	0.2～0.75	≥1000	For small pipe.	GB2624-81 ISO/TR15377 flow handbook	A,A1,A2 B,B1,B2,B3 C,D,E,T	Figure 22
	LGMZ	single drill tappings
	LGMF	flange tappings
Inner small orifice plate	LGNF	flange tappings	6～50	≤42.0	0.1～0.75	≥1000	For small pipe. main suitable for petrochemical.	flow handbook	A,A1,A2	Figure 23
ANB flowmeter	LGZT	Special tappings	25～5000	≤6.4	——	10³～10⁷	lower pressure loss, mainly used for larger pipe, short straight pipe requirement	manufacturer standard	E,F1,F2,W	Figure 24
low pressure loss flowmeter	LGFT	Special tappings	200～5000	≤6.4	——	10⁴～10⁷	lower pressure loss, mainly used for larger pipe, short straight pipe requirement	manufacturer standard	F1,F2,W
double-tier venturi tube	LGST	Special tappings	150～5000	≤6.4	——	10⁴～10⁷	lower pressure loss, mainly used for larger pipe, short straight pipe requirement	manufacturer standard	E,F1,F2,W	Figure 27
airfoil type volume measuring device	LGJT	Special tappings	50～5000	≤6.4	0.3～0.65	2.5×10⁵～10⁷	mainly used for wind rate measurement , short straight pipe requirement.	manufacturer standard	F1,F2,W	Figure 25 Figure,26
Restriction orifice	LGA	≤400	≤400	≤42.0	——	———	not for flow measurement, to restrict the fluid pressure.	flow handbook	D,E	Figure 28