ATF differential pressure throttling device-科技-流量测量-杭州研控科技有限公司

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ATF differential pressure throttling device

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ATF

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节流装置

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Amitec ATF balanced throttling device

◎Short straight pipe sections are required to provide excellent measurement performance.

◎Equipped with dual effects of rectification and measurement.

◎Low pressure loss, high measurement accuracy, and good measurement dynamic performance.

◎Can measure gases, vapors, and liquids, with a wide range of applications.

◎The structure is simple and firm, without movable components, stable and reliable.

◎Directly replaceable orifice plate

◎Can provide customized products

◎Based on international standards (ISO 5167) and national standards (GB/T 2624) for design and manufacturing

ATF差压式节流装置

ATF balance throttling device

The ATF balanced throttling device is based on the widely used differential pressure throttling devices of "balance" and "orifice plate". On the basis of effective integration, the R-angle design of the flow hole is added, which not only solves the durability problem of the right angle edge of the flow hole in the throttling plate, but also strengthens the self tuning function of the flow field, making the ATF series products have shorter straight pipe section requirements, Furthermore, the flowability and outflow coefficient have been effectively improved on the basis of standard orifice plates. Meanwhile, through simulation and extensive real flow testing, the ATF series has taken a solid step towards standardization.

The ATF balanced throttling device can be applied to various mixed gases (such as gas, biogas, coal gas, etc.), low-temperature gases such as LNG, liquid nitrogen, liquid oxygen, liquid oxygen, liquefied ethylene, etc.), gas-liquid two-phase media (such as wet gas), slurry, bidirectional flow, etc. It is almost suitable for all fluid measurements and has been widely used in industries such as petroleum, chemical industry, metallurgy, power, natural gas, water treatment, etc, It is an energy-saving instrument with broad application prospects.

Working principle

ATF is a differential pressure throttling device, whose measurement principle is: when the fluid filled with the pipeline passes through the throttling element in the pipeline, the flow beam will form local contraction at the throttling element, resulting in an increase in the flow rate of the fluid through the throttling hole and a decrease in the static pressure behind the throttling element. As a result, a pressure difference, also known as differential pressure, occurs before and after the throttling element. The greater the fluid flow rate, the greater the differential pressure generated, and this differential pressure is proportional to the square of the flow rate. This measurement method is based on the flow continuity equation (mass conservation law) and Bernoulli equation (energy conservation law), and is the theoretical basis for all differential pressure flow meters.

The ATF balanced flow sensor is a plate type throttling device installed on the cross-section of the pipeline. The flow holes designed based on the Reynolds number and flow field of the pipeline are distributed on the throttling element according to certain rules. When the fluid passes through the orifice, it will be regularly divided and balanced to minimize eddy currents, forming an approximate ideal flow field and obtaining a stable differential pressure signal. The volume flow rate and mass flow rate will be calculated based on the Bernoulli equation.

ATF差压式节流装置

Structural characteristics

The widely used standard orifice throttling devices nowadays only have one flow hole, and the plate surface throttling resistance consumes the kinetic energy of the fluid, resulting in significant permanent pressure loss, and requires a long straight pipe section to organize the flow field and restore pressure.

The testing related to the ATF balance flow sensor has proven that through a reasonable hole design, fluid balance rectification can be cleverly achieved, significantly reducing the formation of vortices, reducing dead zone effects, reducing the loss of fluid kinetic energy, and reducing the fluctuation of pressure point signals caused by vortices.


standard orifice plate	Balanced throttling device

TECHNICAL FEATURES

High linearity and good repeatability

The ATF balanced flow sensor has a symmetrical porous structure, which can balance the flow field, reduce eddy current, vibration, and signal noise, and greatly improve the stability of the flow field. From its comprehensive performance, the ATF balanced flow sensor belongs to the category of high-precision flow meters.

Low permanent pressure loss

The ATF balanced flow sensor reduces the formation of vortex in the throttling zone and the shear force of turbulence through optimized design, reducing the loss of kinetic energy. Under the same measurement conditions, the pressure recovery is twice that of the standard orifice plate, and the permanent pressure loss is half that of the standard orifice plate, thus saving considerable operating costs. It is an energy-saving flow instrument that meets the requirements of energy conservation and environmental protection and is worth promoting extensively.

Good long-term stability

Due to the significant reduction of turbulent shear force and the absence of sharp angles in the measuring hole, the direct friction between the medium and the throttling element is greatly reduced. Its B-value remains unchanged for a long time, and the long-term stability of the discharge coefficient is very good. The entire instrument has no movable parts, so it can maintain stability for a long time, and its service life is extended by 5-10 times compared to traditional orifice plates.

Directly replaceable orifice plate

The balanced flow sensor and orifice plate have the same usage method, so they can be directly replaced without any changes in piping.

Low requirements for straight pipe sections

The ATF balanced flow sensor can adjust and balance the flow field, reduce eddy current, vibration, and signal noise, significantly improve the stability of the flow field, and greatly shorten the requirements for straight pipe sections. The front and rear straight pipe sections are generally 2D and 2D, with a minimum of 0D. The use of a balanced flow sensor can save a large number of straight pipe sections.

Resistant to dirt and not easily blocked

The forward-looking hole design reduces the formation of turbulent shear forces and eddies, enhances the flow velocity in the throttling zone, especially the boundary flow velocity, greatly reduces the formation of stagnant dead zones, reduces the possibility of dirty media accumulating before and after the throttling plate, and reduces the opportunity for fluid holes to be blocked.

Wide application range

The ATF balance throttling device can measure various gases, liquids, and vapors; The fluid conditions can range from ultra-low temperature to supercritical state, with a maximum process temperature of 850 ° C and a maximum working pressure of 42MPao

The ATFT scale throttling device can achieve a completely symmetrical design on the left and right, so bidirectional flow measurement can be achieved without any adjustments.

Technical Parameter

Measurement medium	Conventional media: liquid, gas, steam Special media: dirty, corrosive, high viscosity, high/low temperature, high pressure, liquefied gas
Applicable working conditions	-250°C~850°C.Max.42MPa
Instrument size	DN15-DN3000(l/2"-120n)
Uncertainty	±1.0% （± 0.5% of the geometric dimensions have been checked and calibrated in the laboratory）
repeatability	±0.1%
Range ratio	10：1
B value range	0.25-0.85
Permanent pressure loss	20%～40%DP
Reynolds number	The minimum can be less than 1000 (special matching), and the maximum can be greater than 107
Instrument material	Conventional materials: CS, 304, 304L, 316, 316L Special materials: DuplexSS, HastelloyC-276, Monel400
pipe connection	Pipeline type, flange wafer type, welding type, etc

structural style

Pipeline type ATFP

Caliber size:DN15-DN600 (1/2" ~24”)

Equipped with precision measurement pipelines, pressure measuring devices, and body flanges, the balanced flow sensor is located in the center, symmetrical to the left and right, and can measure bidirectional flow.

The scope of use is suitable for most media and working conditions such as gases, liquids, steam, and natural gas. Structural features: precision machining of the entire component, high measurement accuracy.

Flange clamp type ATFF

Caliber size:DN15 - DN3000(l/2" ~120M)

Equipped with a balanced flow sensor and pressure measuring device, the balanced flow sensor is located in the center, symmetrically left and right, and can measure bidirectional flow.

The scope of use is suitable for most media and working conditions such as gases, liquids, steam, and natural gas. Structural features: simple structure and convenient installation.

Welded ATFW

Caliber size:DN15- DN3000 (1/2” 220”)

Including precision measurement pipelines, balanced flow sensors, and pressure measuring devices, the balanced throttling element is located in the center, symmetrical to the left and right, and can measure bidirectional flow.

The scope of use is suitable for most media and working conditions such as gases, liquids, steam, and natural gas. Structural features: simple installation and maintenance free.


NPT taper thread or PSW socket welding Scope of application: Various temperatures and pressures, applicable to gases, liquids, and vapors NPT specifications：1/4"NPT、1/2"NPT PSW specifications:Ф19、Ф23	Double flange pressure measurement Scope of application: Liquid, dirt, and dust gases that require isolation and measurement, such as viscous, toxic, and strongly corrosive liquids. Pressure flange specifications：llnch、2lnch、3lnch
ATFP pipeline type Caliber range:DN50-DN600 Pressure Range：CL150-2500.PN2.5-PN160cm:CL150-CL2500,PN2.5-PN160 Structural characteristics：The entire component is precision machined with high measurement accuracy. Scope of application: Suitable for gases. Liquid. Steam, natural gas, and most other media and operating conditions.

Table of Structural Dimensions for Flat Welded Flanges

Nominal diameter		outside diameter（mm)		ANSIB165/ HGfT20615-2009	HG/T 20592-2009					pressure tap
				CL150/20	PN25	PN6	PN10	PN16	PN25
				RF/SO	RF/PL
DN	NPS	1	II	A	A	A	A	A	A	NPT(IN)
15	1/2"	21.3	18	231	231	231	231	231	231	1/4
20	3/4"	26.7	25	231	231	231	231	231	231	1/4
25	1"	33.4	32	231	231	231	231	231	231	1/4
32	11/4"	42.2	38	231	231	231	231	231	231	1/4
40	11/2"	48.3	45	231	231	231	231	231	231	1/4
50	2"	60.3	57	231	231	231	231	231	231	1/2
65	21/2"	73	76	295	295	295	295	295	295	1/2
80	3"	88.9	89	295	295	295	295	295	295	1/2
100	4"	114.3	108	295	295	295	295	295	295	1/2
125	5"	141.3	133	315	315	315	315	315	315	1/2
150	6"	168.3	159	315	315	315	315	315	315	1/2
200	8"	219.1	219	319	319	319	319	319	319	1/2
250	10”	273	273	359	359	359	359	359	359	1/2
300	12”	323.8	325	399	399	399	399	399	399	1/2
350	14"	355.6	377	399	399	399	399	399	399	1/2
400	16”	406.4	426	433	433	433	433	433	433	1/2
450	18”	457	480	463	463	463	463	463	463	1/2
500	20”	508	530	493	493	493	493	493	493	1/2
600	24"	610	630	563	563	563	563	563	563	1/2

Table of Structural Dimensions for Butt Welding Flanges

Nominal diameter		outside diameter（mm) \	ANSIB16.5 / HG/T20615-2009										pressure tap
			CL300	CL600	CL900	CL1500	CL2500	CL300	CL600	CL900	CL1500	CL2500
			RF7WN					RJ/WN
DN	NPS	1	A	A	A	A	A	A	A	A	A	A	NPT(IN)
15	1/2'*	21.3	331	343	359	359	385	338	340	358	358	384	1/4
20	3/4“	26.7	341	353	379	379	397	350	352	378	378	396	1/4
25	1"	33.4	349	363	385	385	417	358	362	384	384	416	1/4
32	11/4"	42.2	357	373	385	385	429	366	372	384	384	431	1/4
40	11/2"	48.3	363	379	405	405	461	372	378	404	404	463	1/4
50	2"	60.3	365	385	443	443	493	377	387	445	445	495	1/2
65	21/2"	73	439	457	509	509	585	451	459	511	511	590	1/2
80	3"	88.9	445	465	503	533	635	457	467	505	535	640	1/2
100	4"	114.3	460	506	530	550	682	469	505	529	549	687	1/2
125	5"	141.3	506	550	576	634	780	515	549	575	633	788	1/2
150	6"	168.3	506	556	602	664	868	515	555	601	663	876	1/2
200	8"	219.1	532	588	646	748	958	541	587	645	753	970	1/2
250	10”	273	584	666	730	870	1200	593	665	729	875	1218	1/2
300	12”	323.8	650	714	802	968	1330	659	713	801	980	1348	1/2
350	14"	355.6	674	732	828	998		683	731	833	1013		1/2
400	16"	406.4	710	788	864	1054		719	787	869	1072		1/2
450	18”	457	766	830	920	1116		775	829	928	1134		1/2
500	20”	508	802	872	988	1204		814	874	996	1222		1/2
600	24"	610	886	968	1146	1374		901	973	1161	1398		1/2

Nominal diameter		outside diameter(mm)		HG/T20592-2009							Fankou
				PN40	PN63	PN100	PN160	PN63	PN100	PN160
				RF/WN				RJ/WN
DN	NPS	1	II	A	A	A	A	A	A	A	NPT(IN)
15	1/2"	21.3	18	301	315	315	315	328	328	328	1/4
20	3/4"	26.7	25	305	321	321	329	334	334	342	1/4
25	1"	33.4	32	305	341	341	341	354	354	354	1/4
32	11/4"	42.2	38	309	345	345	345	358	358	358	1/4
40	11/2"	48.3	45	315	349	349	353	362	362	366	1/4
50	2"	60.3	57	321	349	361	375	365	377	391	1/2
65	21/2"	73	76	389	421	437	449	377	393	405	1/2
80	3"	88.9	89	401	429	441	457	445	457	473	1/2
100	4"	114.3	108	418	444	468	488	457	481	501	1/2
125	5"	141.3	133	444	484	518	538	477	511	531	1/2
150	6"	168.3	159	458	498	538	564	511	551	581	1/2
200	8"	219.1	219	484	528	568	588	541	581	607	1/2
250	10"	273	273	558	598	662	658	571	635	637	1/2
300	12"	323.8	325	618	668	728	738	641	701	723	1/2
350	14"	355.6	377	638	688	766		701	785		1/2
400	16"	406.4	426	688	738			721			1/2
450	18"	457	480	718							1/2
500	20"	508	530	758							1/2
600	24"	610	630	848							1/2

注：The data in the table is applicable to NPT or PSW pressure measurement. For double flange pressure measurement, there may be changes in structural dimensions. Please contact the manufacturer directly for specific lengths.

Flange clamp type ATFF

Caliber range：DN15-DN3000

Pressure Range：CL150-CL2500, PN2.5-PN160

Structural features: simple structure and convenient installation

Scope of application: Suitable for most media and working conditions such as gas, liquid, steam, natural gas, etc.

Outline Drawing：

ATF差压式节流装置

Structure size table：

Nominal diameter		outside diameter（mm)		HG/T20592-2009							Fankou
				PN10	PN16	PN25	PN40	PN63	PN100	PN160
				RF
DN	NPS	1	II	A	A	A	A	A	A	A	Inch
25	1"	33.4	32	132	132	132	132	156	156	156	1/2
32	11/4"	42.2	38	136	136	136	136	160	160	152	1/2
40	11/2"	48.3	45	142	142	142	142	160	160	160	1/2
50	2"	60.3	57	149	149	151	151	167	175	189	1/2
65	21/2"	73	76	142	153	159	159	183	190	185	1/2
80	3"	88.9	89	161	161	169	169	189	193	201	1/2
100	4"	114.3	108	152	152	170	170	184	196	212	1/2
125	5"	141.3	133	158	165	183	183	207	233	253	1/2
150	6"	168.3	159	158	158	186	186	210	246	272	1/2
200	8"	219.1	219	168	168	192	200	236	276	296	1/2
250	10"	273	273	180	180	204	226	266	330	326	1/2
300	12"	323.8	325	196	192	208	246	296	356	366	1/2
350	14"	355.6	377	204	196	216	266	316	394		1/2
400	16"	406.4	426	213	201	239	289	339			1/2
450	18"	457	480	213	193	239	289				1/2
500	20"	508	530	219	199	269	299				1/2
600	24"	610	630	229	209	269	319				1/2
700	28"	711	720	195	229						1/2
800	32"	813	820	211	239						1/2
900	36"	914	920	218	249						1/2
1000	40"	1016	1020	218	269						1/2
1200	48"	1219	1220	256	289						1/2
1400	56"	1422	1420	265	318						1/2
1600	64"	1626	1620	285	348						1/2
1800	72"	1829	1820	305	368						1/2
2000	80"	2032	2020	325	388						1/2

Nominal diameter		outside diameter（mm)	ANSI B16.5 / HG/T20615-2009						Fankou
			CL150	CL300	CL600	CL900	CL1500	CL2500
			RF
DN	NPS	1	A	A	A	A	A	A	Inch
25	1"	33.4	172	178	188	192	192	210	1/2
40	11/2"	4S.3	178	186	196	204	204	248	1/2
50	2"	60.3	185	193	203	237	243	287	1/2
65	21/2”	73	190	218	200	233	233	317	1/2
80	3"	88.9	197	205	215	243	273	375	1/2
100	4"	114.3	194	196	230	254	274	406	1/2
125	5"	141.3	228	226	251	277	335	481	1/2
150	6"	168.3	220	218	264	310	372	576	1/2
200	8"	219.1	240	240	296	354	456	666	1/2
250	10"	273	240	252	334	398	538	868	1/2
300	12"	323.8	258	278	342	430	596	958	1/2
350	14"	355.6	276	302	360	456	626		1/2
400	16"	406.4	279	311	389	465	655		1/2
450	18"	457	299	337	401	491	687		1/2
500	20"	508	309	343	413	529	745		1/2
600	24"	610	325	357	439	617	845		1/2
650	26"	662	200	312	398	554			1/2
700	28"	711	214	322	416	588			1/2
750	30"	764	222	338	446	614			1/2
800	32"	813	238	360	468	642			1/2
850	34"	866	244	368	502	674			1/2
900	36"	914	258	384	528	692			1/2
950	38"	968	270	408					1/2
1000	40"	1016	280	419					1/2
1050	42"	1070	296	438					1/2
1100	44"	1121	302	458					1/2
1150	46"	1173	318	474					1/2
1200	48"	1219	328	476					1/2
1250	50"	1273	336	498					1/2
1300	52"	1324	344	514					1/2
1350	54"	1375	352	508					1/2
1400	56"	1422	362	566					1/2
1450	58"	1476	378	578					1/2
1500	60"	1524	388	572					1/2

Note: 1. The orifice flange complies with the HG/T20592-2009x ANSI B16.5/HG/T20615-2009 standard, and the connection size meets the on-site pipeline connection requirements;

2、Please contact the manufacturer for confirmation if it exceeds the above range.

Welded ATFW

Caliber range：DN15-DN3000

Pressure Range：CL150-CL2500, PN2.5-PN160

Structural features: simple installation and maintenance free.

Scope of application: Suitable for most media and working conditions such as gas, liquid, steam, natural gas, etc

Nominal diameter		outside diameter (mm)		Structure length (mm)	Fankou	Nominal diameter		outside diameter (mm)		Structure length (mm)	Fankou
DN	NPS	1	II	A	Inch	DN	NPS	1	II	A	Inch
15	1/2"	21.3	18	220	1/2	800	32"	819.2	-	600	1/2
20	3/4"	26.7	25	220	1/2	850	34"	870	-	600	1/2
25	1"	33.4	32	220	1/2	900	36"	920.8	-	600	1/2
32	11/4"	42.2	38	220	1/2	950	38"	971.6	-	600	1/2
40	11/2"	48.3	45	220	1/2	1000	40"	1022.4	-	600	1/2
50	2"	60.3	57	220	1/2	1050	42"	1074.7	-	600	1/2
65	21/2"	73	76	280	1/2	1100	44"	1125.5	-	600	1/2
80	3"	88.9	89	280	1/2	1150	46"	1176.3	-	600	1/2
100	4"	114.3	108	280	1/2	1200	48"	1227.1	-	600	1/2
125	5"	141.3	133	300	1/2	1250	50"	1277.9	-	600	1/2
150	6"	168.3	159	300	1/2	1300	52"	1328.7	-	600	1/2
200	8"	219.1	219	300	1/2	1350	54"	1379.5	-	600	1/2
250	10"	273	273	340	1/2	1400	56"	1430.3	-	600	1/2
300	12"	323.8	325	380	1/2	1450	58"	1481.1	-	600	1/2
350	14"	355.6	377	380	1/2	1500	60"	1557.3	-	1500	1/2
400	16"	406.4	426	410	1/2	1600	64"	1626	1620	1500	1/2
450	18"	457	480	440	1/2	1800	72"	1829	1820	1500	1/2
500	20"	508	530	470	1/2	2000	80"	2032	2020	1500	1/2
550	22"	559	-	500	1/2	2200	88"	-	-	1500	1/2
600	24"	610	630	540	1/2	2400	96"	-	-	1500	1/2
650	26"	665.2	-	600	1/2	2600	104"	-	-	1500	1/2
700	28"	716	-	600	1/2	2800	112"	-	-	1500	1/2
750	30"	768.4	-	600	1/2	3000	120"	-	-	1500	1/2

Note: 1. The structural dimensions of material K are as follows:

The structural size of DN50-DN300 is 150mm, and the structural size of DN350-DN600 is 210mm. If it exceeds the range, please contact the manufacturer to confirm;

2. For unconventional materials, there may be changes in structural dimensions. Please contact the manufacturer for confirmation;

3. The data in the table is applicable to NPT or PS pressure. For double flange pressure measurement, there may be changes in structural dimensions. Please contact the manufacturer directly for specific lengths.

ATF差压式节流装置

Special material loose sleeve double flange structure

ATF差压式节流装置

Insulation jacket double flange structure

In addition to the conventional structure mentioned above, Amitec can also provide customized products based on purchasing needs.

Amitec Balanced Flowmeter Selection Code

Basic model	ATF
structure type	P	Pipeline type
	D	Clamping type
	W	welded type
	F	Flange clamping
Primary component type
A	Porous balanced orifice plate
B	4-hole adjustable orifice plate
4-hole adjustable orifice plate		Material of throttling components
A	CS	A	CS
B	3048	B	3048
C	304L	C	304L
D	316	D	316
E	316L	E	316L
F	321	F	321
G	15CrMo	G	15CrMo
H	1CrMo	H	1CrMo
I	121CrMoV	I	121CrMoV
J	MONEL625	J	MONEL625
K	MONEL400	K	MONEL400
L	P91	L	P91
M	HC	M	HC
#	Customization of other materials	#	Customization of other materials
Fluid Type
L	liquid
G	gas
V	steam
Pressure tap form
N	NPT
S	PSW
1	1"flange
2	2"flange
#	other
Measuring tube diameter The most commonly used options for standard products, and for extended products, please contact sales to discuss.
050	50mm
065	65mm
080	80mm
0100	100mm
0125	125mm
0150	150mm
0175	175mm
0200	200mm
0300	300mm
0350	350mm
0400	400mm
0450	450mm
0500	500mm
0600	600mm

pressure rating
P1	CL150
P3	CL300
P6	CL600
P9	CL900
P15	CL1500
P25	CL2500
P21	PN2.5
P22	PN6
P23	PN10
P24	PN16
P25	PN25
P26	PN40
P27	PN63
P28	PN100
P29	PN160
P30	PN250
P31	PN320
Process connection surface
F	FF
R	RF
M	MFM
J	RJ
#	Other connecting surfaces

attachment options

Install accessory companion flanges and fasteners
AB	Installation flange (including fasteners)
C	three-valve manifold
D	isolation valve
F4	PTFE Gasket
JS	Metal graphite spiral wound gasket
calibration
WE	Factory Flow Calibration Report
WA	Third party flow calibration report
Pressure measurement
2R	Two pairs of pressure measurement
3R	Three pairs of pressure measurement
C1	Oil prohibition and cleaning under special working conditions
D1	flaw detection
E1	Third party inspection report

Material Code Extension Table：

The materials in the selection table are typical. If they exceed the scope of the selection table, please refer to this extended table for selection.

code	Extended Material
A	10#/ Q235/ A3 /20#/20G / A105/ A106-B WCB/ LE45/ API 5L-B/ ST45.8/III
B	SS400(22)
F	Containing 10-18Ni9Ti
G	Containing WB36 / 15NiOu MbNb5 / 15NiOu MbNb564 / 350rMb
H	12Cr5Mb
L	16MnD / QB45/L415/A333-Gr3 / A333-Gr6 / A694-F60 / A350-LF2 / API5L-X60
0	0Cr9MblVNbN(A335-P90) / 12Cr2Mb / (A335-P22) / 10MbWVNb / 10CrMb910)

Note: In material selection, the code can represent the specific meaning of the expanded material in the table. The actual order shall prevail.

ATF差压式节流装置

Integrated balanced flow meter

无