Product Structure Features

The electro-hydraulic linkage quick shut-off valve is mainly installed in high safety systems such as the steam extraction pipeline of the steam turbine, the intake pipeline of the blast furnace top gas recovery turbine unit (TRT), and serves as an emergency shut-off valve. In the event of a crisis condition in the system, emergency valve closure is implemented within 0.3 to 0.8 seconds to achieve reliable shutoff of the pipeline, effectively preventing steam and condensate from flowing back into the tail of the steam turbine or cutting off the gas pipeline, and protecting the safety of the steam turbine unit.

The Main Structure Features Include

1. The electro-hydraulic linkage quick shut-off valve is composed of four major parts: the main valve, the gear rod cylinder transmission device, the hydraulic system, and the electrical control system.2. The rack and pinion transmission box has a compact structure and is directly connected to the oil cylinder; A buffer device is installed at the end of the oil cylinder to eliminate the inertial impact during quick closing and extend the service life of the valve.3. The normal opening and closing of the power source is generally provided by the oil pump unit in the hydraulic system, and can also come from the main auxiliary hydraulic pressure of the steam turbine.4. The electrical control system is divided into ordinary relay type and PLC intelligent control type according to the main logic component category.5. The system is equipped with conventional control actions such as normal valve opening, normal valve closing, stop, and quick valve closing.7. The system is equipped with a local control circuit and a remote linkage control circuit.       

Standards and Specifications

Manufacturing Standards		JB/T8527
Structure length		GB/T12221
Piping flange		GB/T9112-9124
Quality assurance		ISO9001:2000
Test and Inspection		JB/T9092 、 GB/T13927
Nominal diameter DN		150-4000mm
Nominal pressure PN		0.25-4.0MPa 、 150-300Lb
Test pressure	Seal	1.1 × PN
	Strength	1.5 × PN
Work pressure		＜ 1.0 × PN

Main outline and connection size(PN0.6MPa)

DN	L	D	D1	D2	b	n	d	B1	B2	B3	H1	H2	H0
200	152	320	280	254	22	8	18	279	166	630	225	371	698
250	165	375	335	309	24	12	18	279	166	630	262	420	784
300	178	440	395	363	24	12	22	279	166	630	297	446	845
350	190	490	445	413	24	12	22	279	166	630	329	515	946
400	216	540	495	463	24	16	22	279	166	630	359	547	1008
450	222	595	550	518	24	16	22	279	166	630	394	571	1067
500	229	645	600	568	26	20	22	413	278	710	438	670	1211
600	267	755	705	667	30	20	26	413	278	710	493	740	1336
700	292	860	810	772	30	24	26	413	278	710	533	785	1421
800	318	975	920	878	30	24	30	413	278	710	588	845	1536
900	330	1075	1020	978	30	24	30	570	359	1008	652	935	1712
1000	410	1175	1120	1078	30	28	30	570	359	1008	717	1000	1842
1200	470	1405	1340	1295	32	32	33	570	359	1008	827	1115	2067
1400	530	1630	1560	1510	34	36	36	739	467	1205	980	1345	2480
1600	600	1830	1760	1710	36	40	36	739	467	1205	1095	1445	2695

Main outline and connection size (N1.0MPa)

DN	L	D	D1	D2	b	n	d	B1	B2	B3	H1	H2	H0
200	152	340	295	266	26	8	22	279	166	630	225	371	698
250	165	395	350	319	26	12	22	279	166	630	262	420	784
300	178	445	400	370	26	12	22	279	166	630	297	446	845
350	190	505	460	429	26	12	22	279	166	630	329	515	946
400	216	565	515	480	26	16	26	279	166	630	359	547	1008
450	222	615	565	530	28	16	26	279	166	630	394	571	1067
500	229	670	620	582	28	20	26	413	278	710	438	670	1211
600	267	780	725	682	30	20	30	413	278	710	493	740	1336
700	292	895	840	794	30	24	30	413	278	710	533	785	1421
800	318	1015	950	901	32	24	33	413	278	710	588	845	1536
900	330	1115	1050	1001	34	24	33	570	359	1008	652	935	1712
1000	410	1230	1160	1112	34	28	36	570	359	1008	717	1000	1842
1200	470	1455	1380	1328	38	32	39	570	359	1008	827	1115	2067
1400	530	1675	1590	1530	42	36	42	739	467	1205	980	1345	2480
1600	600	1915	1820	1750	46	40	48	739	467	1205	1095	1445	2695

Main outline and connection size（N1.6MPa）

DN	L	D	D1	D2	b	n	d	B1	B2	B3	H1	H2	H0
200	152	340	295	266	24	12	22	279	166	630	225	371	698
250	165	405	335	319	26	12	26	279	166	630	262	420	784
300	178	460	410	370	28	12	26	279	166	630	297	446	845
350	190	520	470	429	30	16	26	279	166	630	329	515	946
400	216	580	525	480	32	16	30	279	166	630	359	547	1008
450	222	640	585	548	31	20	30	279	166	630	394	571	1067
500	229	715	650	609	36	20	33	413	278	710	438	670	1211
600	267	840	770	720	38	20	36	413	278	710	493	740	1336
700	292	910	840	794	40	24	36	413	278	710	533	785	1421
800	318	1025	950	901	42	24	39	413	278	710	588	845	1536
900	330	1125	1050	1001	44	28	39	570	359	1008	652	935	1712
1000	410	1255	1170	1112	46	28	42	570	359	1008	717	1000	1842
1200	470	1485	1390	1328	52	32	48	570	359	1008	827	1115	2067
1400	530	1685	1590	1530	58	36	48	739	467	1205	980	1345	2480
1600	600	1930	1820	1750	64	40	55	739	467	1205	1095	1445	2695

Main outline and connection size（N2.5MPa）

DN	L	D	D1	D2	b	n	d	B1	B2	B3	H1	H2	H0
200	152	360	310	274	30	12	26	279	166	630	225	371	698
250	165	425	370	330	32	12	30	279	166	630	262	420	784
300	178	485	430	389	34	16	30	279	166	630	297	446	845
350	190	555	490	448	38	16	66	279	166	630	329	515	946
400	216	620	550	503	40	16	36	279	166	630	359	547	1008
450	222	670	600	548	42	20	36	279	166	630	394	571	1067
500	229	730	660	609	44	20	36	413	278	710	438	670	1211
600	267	845	770	720	46	20	39	413	278	710	493	740	1336
700	292	960	875	820	50	24	42	413	278	710	533	785	1421
800	318	1085	990	928	54	24	48	413	278	710	588	845	1536
900	330	1185	1090	1028	58	28	48	570	359	1008	652	935	1712
1000	410	1320	1210	1140	62	28	55	570	359	1008	717	1000	1842
1200	470	1630	1420	1350	70	32	55	570	359	1008	827	1115	2067
1400	530	1577	1640	1560	76	36	60	739	467	1205	980	1345	2480
1600	600	1975	1860	1780	84	40	60	739	467	1205	1095	1445	2695