First, The Electric Cut-off Valve Overview
The opening and closing of the electric cut-off valve is a plug-shaped disc, sealing surface was flat or cone, the valve flap along the centerline of the fluid for linear motion. The movement of the stem, there are lifting rod (stem lift, hand wheel does not lift), there are lifting and rotating rod (hand wheel and stem together with the lift, the nut is located on the valve body). The electric shut-off valve is only suitable for full and full clearance, and is not allowed for adjustment and throttling. 

Second, The Electric Cut-off Valve Structural Characteristics
1, Selection of sophisticated, in line with domestic and foreign standards, reasonable structure, handsome in appearance. 
2, The valve, the valve seat sealing surface with iron-based alloy surfacing or Stellite (Stellite) cobalt-based hard alloy surfacing, wear, high temperature, corrosion resistance, scratch resistance, long service life.
3, Stem quenched and tempered and surface nitriding treatment, a good corrosion resistance and scratch resistance. 
4, Can be used with a variety of piping flange and flange sealing surface type to meet the needs of various projects and user requirements. 
5, The full range of valve material, packing, gasket can be based on actual conditions or user requirements reasonable matching, can be applied to a variety of pressure, temperature and media conditions. 
6, Inverted seal with a threaded connection seal or body welded austenitic stainless steel, sealed and reliable, replace the filler can be carried out in the case of non-stop, convenient and quick, does not affect the system operation. 
7, Equipped with DZW series of multi-rotary electric device, with a small shell, light weight, full function, and can be used with remote computer support, but also according to user requirements optional electric device. 

Third, The Application of Electric Cut-off Valve Specifications

Design and Manufacture		GB / T12235
Connection Size	Structure length	GB / T12221
	Flange size	JB / T79
Inspection and Testing		JB / T9092
Material	Carbon steel	GB / T12229
	Stainless Steel	GB / T12230
	Alloy Steel	Q / ZB66
Logo		GB / T12220
Supply		JB / T7928

Fourth, The Main Parts of The Electric Valve and The Main Use

Body	Cap	Discs	Sealing Ring	Stem	filler	Applicable Media	Applicable Temperature (≤ ℃)
WCB		WCB + D507MO	D577	2Crl3	Flexible Graphite	Water, Oil, Steam	425
ZGlCrl8Ni9Ti		0Crl8Ni9Ti +  Stellite12	Stellite6	lCrl8Ni9Ti	PTFE	Nitric Acid	200
ZGlCrl8Ni2Mo2Ti		CF8M +  Stellite12	lCrl8Ni2Mo2Ti	lCrl8Ni2Mo2Ti	PTFE	Phosphoric Acid,  Alkali, Mixed Acid	200
ZG00Crl7Nil4M02		CF3M +  Stellite12	Stel1ite6	316L	PTFE	Phosphoric Acid,  Urea, Methyl Ammonium Liquid	200
ZGlCr5MO		ZGlCr5MO +  Stellite12	Stel1ite6	25Cr2Mo1VA	Flexible Graphite	Water, Oil, Steam	550

Condition on the pipeline, cut off or turn on the pipe medium. Driving methods are manual, gear drive, electric, pneumatic and so on.  

 Fifth, J941H Electric Cut-off Valve Main Shape and Connection Size

Nominal Pressure  PN (MPa)	Nominal Diameter  DN (mm)	Standard Value									Reference
		L	D	D1	n2	D6	b	f	f1	Z-φd	L1	H	Quality (kg)
1.6	50	230	160	125	100		16	3		4-φ18	590	645	48
	65	290	180	145	120		18	3		4-φ18	590	690	60
	80	310	195	160	135		20	3		8-φ18	590	715	65
	100	350	215	180	155		20	3		8-φ18	590	770	71
	125	400	254	210	185		22	3		8-φ18	590	780	119
	150	480	280	240	210		24	3		8-φ23	590	810	210
	200	600	335	295	265		26	3		12-φ23	810	967	320
	250	622	405	355	320		30	3		12-φ25	810	1143	550
	300	698	460	410	375		30	4		12-φ25	830	1292	785
2.5	50	230	160	125	100		20	3		4-φ18	590	645	50
	65	290	180	145	120		22	3		8-φ18	590	690	65
	80	310	195	160	135		22	3		8-φ18	590	715	67
	100	350	230	190	160		24	3		8-φ23	590	770	73
	125	400	270	220	188		28	3		8-φ25	590	780	127
	150	480	300	250	218		30	3		8-φ25	810	810	215
	200	600	360	310	278		34	3		12-φ25	810	967	322
	250	622	425	370	332		36	3		12-φ30	830	1143	585
	300	698	485	430	390		40	4		16-φ30	830	1292	795
4.0	50	230	160	125	100	88	20	3	4	4-φ18	590	645	61
	65	290	180	145	120	110	22	3	4	8-φ18	590	690	75
	80	310	195	160	135	121	22	3	4	8-φ18	590	715	84
	100	350	230	190	160	150	24	3	4.5	8-φ23	590	770	101
	125	400	270	220	188	176	28	3	4.5	8-φ25	810	782	207
	150	480	300	250	218	204	30	3	4.5	8-φ25	810	875	226
	200	600	375	320	282	260	38	3	4.5	12-φ30	810	1160	399
6.4	50	300	175	135	105	88	26	3	4	4-φ23	590	710	64
	65	340	200	160	130	110	28	3	4	8-φ23	590	750	77
	80	380	210	170	140	121	30	3	4	8-φ23	590	785	86
	100	430	250	200	168	150	32	3	4.5	8-φ25	810	837	171
	125	500	295	240	202	176	36	3	4.5	8-φ30	810	1031	243
	150	550	340	280	240	204	38	3	4.5	8-φ34	830	1066	296
	200	650	405	345	300	260	44	3	4.5	12-φ34	830	1213	420
10.0	50	300	195	145	112	88	28	3	4	4-φ25	590	714	81
	65	340	220	170	138	110	32	3	4	8-φ25	590	734	102
	80	380	230	180	148	121	34	3	4	8-φ30	810	847	175
	100	430	265	210	172	150	38	3	4.5	8-φ30	810	950	194
	125	500	310	250	210	176	42	3	4.5	8-φ34	830	1141	285
	150	550	350	290	250	204	46	3	4.5	12-φ34	830	1240	450
	200	650	430	360	312	260	54	3	4.5	12-φ4l	830
16.0	50	300	215	165	132	88	36	3	4	8-φ25	590	562	92
	65	340	245	190	152	110	44	3	4	8-φ30	810	743	165
	80	380	260	205	168	121	46	3	4	8-φ30	830	820	216
	100	430	300	240	200	150	48	3	4.5	8-φ34	830	935	238