KD7T42、KD7T42P Spring type quick closing butterfly valve is widely used in gas waste heat power generation system and extraction steam heating steam turbine system. As the guarantee of system safety, this kind of valve has been widely used. It can replace the electric stop valve and check valve in the original system design because of its excellent performance such as quick closing, flow resistance and sealing.

This valve is mainly used in parallel units of thermal power plant and gas waste heat generator set, as an emergency shut-off valve to protect the safety of the system.

1. The fast closing time can reach 0.5 seconds, and the emergency cut-off is safe and reliable.
2. Three eccentric metal seal, seal structure, light and flexible opening and closing, sealing zero leakage.
3. Double eccentric soft sealing structure can be selected for normal temperature medium, with low cost and reliable sealing.
4. Close the valve end buffer, effectively avoid the valve inertia impact.
5. Spring can be used to realize quick closing, and accumulator can be used to realize quick closing of liquid. The two forms are the same, and they are also safe and reliable.

KD7T42、KD7T42P Connection dimensions of spring type quick closing butterfly valve(mm)

DN	P	L	L1	L2	H1	H2	Flange connection size
400	0.6	216	966	1449	320	780	GB/T17241 DB/T9113
	1.0	216	966	1449	330	785
	1.6	216	966	1449	345	800
450	0.6	222	966	1449	370	805
	1.0	222	966	1449	380	810
	1.6	222	966	1449	395	835
500	0.6	229	966	1449	400	898
	1.0	229	966	1449	410	898
	1.6	229	966	1449	425	898
6000	0.6	267	966	1449	440	898
	1.0	267	966	1449	460	920
	1.6	267	1150	1820	470	1020
700	0.6	292	966	1449	436	950
	1.0	292	1150	1820	550	1075
	1.6	292	1150	1820	570	1100
800	0.6	318	1150	1820	625	1142
	1.0	318	1150	1820	640	1158
	1.6	318	1150	1820	660	1183
900	0.6	330	1150	1820	700	1190
	1.0	330	1150	1820	710	1210
	1.6	330	1150	1820	725	1239
1000	0.6	410	1150	1820	760	1250
	1.0	410	1150	1820	770	1275
	1.6	410	1360	2180	790	1306
1200	0.6	470	1150	1820	875	1360
	1.0	470	1360	2180	890	1385
	1.6	470	1360	2180	915	1418
1400	0.6	530	1360	2180	1000	1478
	1.0	530	1360	2180	1020	1510
	1.6	530	1360	2180	1045	1546
1600	0.6	600	1360	2180	1120	1599
	1.0	600	1360	2180	1140	1639
	1.6	600	1610	2520	1170	1738

 

1. Before installation, check whether the specification, pressure, temperature and corrosion resistance of butterfly valve meet the use requirements. Check whether the parts are damaged or loose.
2. The butterfly valve can be installed on the pipeline at any angle and should be closed; when welding the pipe flange, the valve sealing port should be blocked with a plate to prevent particles and sundries from damaging the sealing surface. After welding, take down the valve, clean the valve sealing surface and pipe cavity, and then install the fixed valve.
3. Please pay attention to the pressure bearing direction when the valve is closed.
4. Before installation, the sealing surface (sealing surface at both ends, sealing surface of butterfly plate and sealing surface of valve seat) shall be thoroughly cleaned to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, and the opening and closing position should be flexible, and the opening and closing position should be consistent with the position indicated by the pointer.
6. Manual operation, clockwise is off, counter clockwise is on, pointer indication is in place, it is not allowed to open and close the valve with additional force.
7. During the pressure test of the valve, it is not allowed to use single flange for installation and pressure test, but double flange installation and pressure test must be adopted. The test pressure shall comply with GB / T13927-92.
8. The bolts shall be tightened symmetrically and alternately instead of separately.
9. The limit screw has been adjusted before delivery, so it is not allowed to adjust it easily. If the configuration of driving device is electric or pneumatic, please refer to the manual of supporting drive device.
10. When the electric butterfly valve leaves the factory, the opening and closing stroke of the control mechanism has been adjusted. In order to prevent the wrong direction when the power supply is connected, the user should first manually open it to the half open position before connecting the power for the first time, and then press the inching switch to check that the direction of the indicator wheel is consistent with the opening direction of the valve.
11. If the valve is found to be open and closed abnormally, the cause shall be found out for repair and elimination, so as to prevent the valve from being damaged due to opening and closing by means of applying force.