Hydropower plant water intake hydraulic counterweight butterfly valve

Parameters

Nominal Diameter	300-6000mm
Nominal Pressure	0.6	1.0	1.6	2.5	MPa
Seal Test Pressure	0.66	1.1	1.76	2.75
Strength Test Pressure	0.9	1.5	2.4	3.75
Medium Temperature	+5℃~+60℃
Suitable Medium	Water
Valve Open Time	60-120s Adjustable
Valve Close Time	Close 65%-90% within 60s(Adjustable), Fully closed within 90-240s( Adjustable)
Hydraulic System Max Pressure	16.0MPa
Leakage	0
Flow Resistance Coefficient	≤0.09

Material

	Name	Material
Main Valve Body	Valve Body	Carbon Steel Q345
	Disc	Carbon Steel Q345
	Stem	45# Steel( surfacing anti-corrosion treatment) or Stainless Steel 2Cr13
	Dynamic Sealing Ring	Stainless Steel 1Cr18Ni9Ti
	Static Sealing Ring	Ductile Iron Surfacing CrCow
Bypass Valve	Valve Body，Valve Core	Cast Steel WCB
	Sealing Surface	Stainless Steel 1Cr18Ni9Ti
	Stem	Stainless Steel 2Cr13
Expansion Joint	Expansion Seat	Cast Steel WCB
Expansion Joint	Expansion Pipe	Carbon Steel Q345

Turbine set inlet hydraulic butterfly valve is generally used at the entrance of hydropower station or pumped storage power station turbine set with water head higher than 250M. the whole valve set includes upstream and downstream connecting pipe, valve body, expansion joints, bypass valve, exhaust valve, etc., Design in line with GB / T14478-1993 "large medium-sized turbine inlet valve basic technical conditions" requirement. Its role is:

1, When a main water supply pipe supplies water to several turbine sets, one of them need to be inspected and repaired, to cut off the flow without affecting the operation of other units.

2, When meeting with turbine set speed system accident, the turbine set speed increases to set value, the valve will be emergency shut down to prevent the accident from expanding.

3, When the turbine set stopped working for a long time, to cut off the upstream water, in order to reduce the guide vane leakage, to prevent the unit peristalsis.

1, The valve is suitable for a wide range of water head, the max water head is up to 1000 meters.

2, After the valve is fully open, the flow path is full diameter straight flow type, the hydraulic loss is small, no cavitation damage when working.

3, Valve closing is light, you can achieve zero leakage standards.

4, Valve is equipped with a working seal and inspection/ repairing seal, When inspection and repairing seal works, we could inspect and repair working seal and shaft end seal, without venting the water in pressure pipe before valve. When inspection and repairing seal works, the valve is equipped with hydraulic locking and manual locking, to ensure absolute safety during maintenance. The valve does not need to install a special repair valve, can save the project investment costs.

5, The hydraulic system uses energy storage tank technology, In the case of emergency power failure, the valve will be closed, to ensure the safety of whole turbine set system.

6, Uses self-regulating shaft seal; uses lead-free self-lubricating bearings. The seal box and shaft end supports are designed as components that are mounted outside the valve flow path, easy to disassemble and repair.

7, PLC programmable logic controller can be used as the electrical control part, to greatly simplify the electrical circuit and according to different working condition requirements, only need to change the program, do not need to change the line, with high versatility. At the same time, the use of PLC makes the valve has self-diagnostic function, and easy to connect to central control room computer.

8, Valve has automatic clean function to the weeds, mud, dirt and other dirt attached in the valve sealing surface. Sealing surface service life is long.

Working procedure

1 Open Valve
Open bypass valve--Release hydraulic lock--Release working seal--Fully open main valve core--Close bypass valve

2 Close Valve
Fully close main valve core-- Working seal works-- Hydraulic lock works

Working Principle

1. Open valve: start oil pump motor set, oil pump transfers pressure oil into the storage tank to the rated pressure and then stop. Open the bypass valve, water flows into shell, the exhaust valve will automatically exhaust. When the main valve inlet and outlet pressure difference reaches the set value, the hydraulic lock solenoid valve will work, lock release, work seal oil pressure will also release. At this point the valve open solenoid valve will work, the pressure oil is transferred into the main oil cylinder rodless chamber, the piston rod drives the valve shaft to rotate, the main valve core will rotate 90 ° to fully open. Close the bypass valve.

2. Close Valve: Close valve solenoid valve will work, the pressure oil is transferred into the main oil cylinder rod chamber, the main oil cylinder rodless chamber will drain, valve core closed. And then working seal works, the hydraulic lock solenoid valve will work, hydraulic locking works.

3. In the process of closing valve, the operating procedures are controlled by linkage signal, valve open and close time can be adjusted by the adjusting and controlling valve in hydraulic circuit.

0.6MPa

DN (mm)	D	D1	b	L	L1	L2	L3	L4	L5	E	E1	E2	E3	E4	E5	E6	Z-φ	φ1	H	H1	H2	K	Motor Power (KW)	Anchor Bolts	Weight (kg)
1000	1175	1120	26	550	930	200	360	245	335	1442	1105	740	830	765	1375	2450	28-30	620	620	1087	430	550	5.5	4-M30	3500
1200	1405	1340	28	630	970	260	420	245	335	1450	1224	790	945	850	1505	2600	32-33	620	710	1060	385	425	5.5	4-M30	4200
1250	1455	1390	30	630	970	260	420	245	335	1442	1250	790	970	900	1520	2720	32-33	620	800	1087	415	350	7.5	4-M30	5000
1400	1630	1560	32	710	1010	260	500	245	335	1450	1318	840	960	960	1597	2800	36-36	620	820	1060	385	300	5.5	4-M30	5900
1600	1830	1760	34	790	1050	260	540	245	335	1450	1418	960	1080	1070	1698	3140	40-36	620	920	1060	385	200	5.5	4-M36	7500
1750	1995	1920	36	870	1070	270	450	245	335	1890	1575	1350	1500	1215	1845	3445	44-39	760	1070	1250	450	265	7.5	4-M46	8500
1800	2045	1970	36	870	1090	270	450	245	335	1890	1600	1370	1510	1220	1869	3500	44-39	642	1035	1060	395	100	7.5	4-M39	9000
2000	2265	2180	38	950	1160	360	590	245	335	1890	1855	1370	1650	1380	2140	3750	48-42	760	1150	1250	450	200	7.5	4-M36	11600
2200	2475	2390	42	800	1160	500	790	245	335	1890	1927	1600	1900	1556	2242	4120	52-42	760	1360	1250	450	410	7.5	4-M36	12000
2250	2620	2490	55	860	1190	600	840	300	390	1891	1939	1600	1880	1630	2283	4235	52-52	800	1380	1292	255	200	7.5	4-M24	14050
2400	2685	2600	44	980	1160	500	800	245	335	1890	2088	2040	2250	1710	2400	4500	56-42	760	1380	1250	450	397	7.5	4-M36	14050
2500	2800	2700	50	980	1260	360	800	245	335	2168	2080	2000	2280	1710	2367	4320	56-48	760	1450	1250	705	100	7.5	4-M36	15000
2800	3115	3020	48	880	970	620	870	300	390	2168	2064	2350	2670	2010	2640	4900	64-42	780	1700	1428	450	172	7.5	4-M42	19000
3200	3535	3430	60	980		600	960	300	390	1890	2469	2550	2800	2830	2813	5660	72-48	860	2020	100		705	11	4-M42	33500
4000	4425	4300	80	1200		750	1160	450	600	2200	3000	3300	3600	3420	3375	7000	84-62	1100	2000	400		915	15	4-M42	55000
4800	5280	5100	80	1400		1000	1360	450	600	2485	3380	3900	4300	3950	3910	7900	102-62	1100	2750	250		1290	15	4-M42	80000

1.0MPa

DN (mm)	D	D1	b	L	L1	L2	L3	L4	L5	E	E1	E2	E3	E4	E5	E6	Z-0	01	H	H1	H2	K	Motor Power (KW )	Anchor Bolts	Weight (kg)
1000	1230	1160	34	550	920	200	360	245	335	1450	1106	740	830	740	1354	2400	28-36	620	620	1060	460	500	5.5	4-M30	3850
1200	1455	1380	38	630	970	260	440	245	335	1450	1224	790	940	850	1464	2600	32-39	620	740	1060	370	410	5.5	4-M36	4800
1250	1510	1430	42	630	970	260	420	245	335	1442	1250	790	970	900	1520	2720	32-39	620	800	1087	415	350	5.5	4-M36	5000
1400	1675	1590	42	710	1010	260	400	245	335	1885	1214	840	960	1135	1493	2800	36-42	642	850	1060	385	270	5.5	4-M36	6700
1600	1915	1820	46	790	1080	270	500	245	335	1890	1570	960	1100	1140	1857	3200	40-48	760	970	1250	450	350	5.5	4-M36	8400
1750	2100	1950	50	870	1070	270	450	245	335	1890	1690	1350	1560	1270	2005	3340	48-45	760	1070	1250	450	250	7.5	4-M36	9100
1800	2115	2020	50	870	1120	440	860	245	335	1890	1710	1370	1600	1320	1995	3500	44-48	760	1100	1250	450	220	7.5	4-M36	9800
2000	2325	2230	54	950	1160	460	640	245	335	1890	1790	1400	1700	1460	1420	2150	48 - 48	760	1200	1250	537	220	7.5	4-M36	12800
2200	2550	2440	58	800	1160	500	780	300	390	1891	1929	1560	1750	1600	2273	4195	52-52	800	1450	1292	370	200	7.5	4-M36	13000
2250	2620	2490	60	980	1170	400	600	300	390	1890	1979	1600	1880	1496	2290	4100	52-56	1000	1380	1250	600	80	7.5	4-M36	13400
2400	2760	2650	60	980	1160	450	650	300	390	1891	2024	1800	2100	1650	2368	4410	56-56	800	1600	1436	475	100	7.5	4-M36	15900
2500	2865	2750	60	980	1160	700	970	300	390	2155	1969	2000	2280	1750	2313	4455	56-56	860	1550	1428	250	150	7.5	4-M36	16000
2600	2960	2850	60	980	1160	800	990	300	390	2168	2159	2150	2470	1855	2505	4660	60-52	780	1555	1436	220	140	7.5	4-M36	20000
3000	3405	3220	60	980	1160	620	980	300	390	2155	2384	2550	2800	2010	2728	4838	68 - 56	860	1900	250	580	100	7.5	6-M42	24000
3500	3950	3810	70	980		600	980	300	390	1860	2784	3000	3300	3082	3128	6397	60-62	860	2180	250		1020	11	6-M42	36500
3600	4005	3890	80	1200		800	1170	300	390	1860	2724	2800	3200	3030	3068	6200	72-62	860	2250	250		1090	11	6-M42	37000
3800	4250	4120	80	1200		750	1160	300	390	1860	2824	3300	3600	3122	3168	6300	72-62	860	2150	250		980	11	6—M42	38000
4200	4615	4500	80	1300		900	1260	450	600	2485	3130	3200	3600	3515	3660	7410	88-62	1100	2560	250		1060	15	6-M42	65000
4400	4880	4700	80	1400		1000	1380	450	600	2485	3180	3700	4000	3730	3710	7460	88-56	1100	2400	250		885	15	6-M42	67000
5300	5730	5600	80	1400		950	1410	500	620	2518	3415	4030	4330		3415		120-65						22		120000

1.6MPa

DN

(mm)

D

D1

b

L

L1

L2

L3

Hydropower plant water intake hydraulic counterweight butterfly valve

Hydropower plant water intake hydraulic counterweight butterfly valve

Item specifics

Product review

Description