SD941-16The type-1 electric telescopic butterfly valve is applicable to the water supply and drainage and gas pipelines of food, medicine, chemical industry, petroleum, electric power, light textile, papermaking and other water supply and drainage and gas pipelines with the temperature ≤ 80 ℃ and the nominal pressure ≤ 1.6Mpa. It has the function of compensating the thermal expansion and cold contraction of the pipeline.

1. The design is novel, reasonable, unique in structure, light in weight, convenient in operation and quick in opening and closing;
2. The telescopic butterfly valve can not only adjust and cut off the flow, but also compensate for the expansion and cold contraction caused by the temperature difference of the pipeline, but also provide convenience for the installation, replacement and maintenance of the valve.
3. The sealing parts can be adjusted and replaced, and the sealing performance is reliable.

 

SD941-16Main parts and components materials of type-A electric telescopic butterfly valve

name	Material Science
valve body	WCB、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、HT250
Valve plate	WCB、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、HT250
Stem	1Cr18Ni9Ti、1Cr18Ni12Mo2Ti、2Cr13
seal ring	CR、NBR、EPDM、FPM
filler	NBR、Flexible graphite, V-type rubber

Design standards: GB / t12238-1989; JB / t8527-1997;
Flange connection size:
GB/T9113.1-2000；GB/T9113.2-2000；
GB/T9115.1-2000；GB/T9115.2-2000；
Structural length: GB / t12221-1989;
Pressure test: GB / t13927-1992; JB / t9092-1999；

1. Power supply: the motor is three-phase AC, 380V (special order 660V, 440V or 220 V), 50 Hz (special order 60 Hz); control line voltage is 220 V / 50 Hz (special order 60 Hz); remote control voltage is 24 VDC.
2. Ambient temperature: - 20 - + 60 ℃ (special order - 60 - + 80 ℃);
3. Relative temperature: ≤ 90% (at 25 ℃);
4. Ordinary type and outdoor type are used in places without inflammable / explosive and corrosive medium; explosion-proof products are D Ⅰ and D Ⅱ BT4, D Ⅰ is suitable for non excavation working face of coal mine; D Ⅱ BT4 is used in factory, which is suitable for explosive gas mixture of class Ⅱ A and Ⅱ B T1-T4;
5. Protection grade: IP55 for outdoor type and explosion-proof type (IP67 can be customized);
6. Working system: short time 10 minutes (30 minutes can be customized);

SD941-16Main technical parameters of type a electric telescopic butterfly valve

Nominal diameter	DN（mm）	50～2000
Nominal pressure	PN（MPa）	0.6	1.0	1.6
Test pressure	strength test	0.9	1.5	2.4
	Sealing test	0.66	1.1	1.76
	Airtight seal test	0.6	0.6	0.6
Applicable temperature	≤80℃
Applicable temperature	Air, water, steam, gas, oil, etc.
Driving form	Manual, worm gear drive, pneumatic drive, electric drive.

SD941-16Connection dimension of external structure of type-1 electric telescopic butterfly valve(mm)

Diameter(DN)	L	LMAX	LMIN	D1	D	Z-Φd	H	H0	A	B	D0	Wt/kg
50	150	163	138	125	165	4-18	82.5	445	125	125	80	61
65	170	188	152	145	185	4-18	92.5	465	125	125	80	74
80	180	192	162	160	200	8-18	100	480	125	125	80	88
100	190	225	180	180	220	8-18	110	505	125	125	80	100
125	200	235	190	210	250	8-18	125	700	325	245	150	120
150	210	240	195	240	285	8-22	142.5	735	325	245	150	125
200	230	265	215	295	340	8-22	170	805	325	245	150	180
250	250	285	235	350	395	12-22	197.5	890	363	313	200	205
300	270	302	252	400	445	12-22	222.5	950	363	313	200	260
350	290	321	271	460	505	16-22	252.5	1020	363	313	250	420
400	310	343	283	515	565	16-26	282.5	1105	363	313	250	520
450	330	360	300	565	615	20-26	307.5	1287	465	439	300	660
500	350	380	320	620	670	20-26	335	1185	546	431	360	700
600	390	425	365	725	780	20-30	390	1330	546	556	360	1020
700	430	465	395	840	895	24-30	447.5	1435	546	556	360	1140
800	470	510	430	950	1015	24-33	507.5	1545	546	556	360	1380
900	510	560	460	1050	1115	28-33	557.5	1800	617	617	360	2100
1000	550	600	500	1160	1230	28-36	615	2365	632	632	360	2520
1200	630	680	580	1380	1455	32-39	727.5	2585	632	632	360	3100

Note: 1. The sealing test pressure of the above butterfly valves is 1.0MPa for dn50-dn800, 0.6MPa for dn900-dn1000, and 0.25MPa for dn200-dn2000.
2. If the working pressure exceeds 1.0MPa, triple eccentric butterfly valve is recommended.
3. The connection dimensions of the above butterfly valves shall be manufactured according to the standard of 1.0MPa; in case of special needs, it shall be indicated when ordering.

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. Please refer to the manual for electric 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.