Insulation gate valve Overview
Insulation gate valve is mainly used in petroleum, chemical, metallurgy, pharmaceutical and other systems, the valve jacket welded to the valve between the two flanges, the valve side, the bottom of the jacket with the connection , The jacket can flow freely through the steam or other hot insulation media to ensure that the viscous medium can flow smoothly through the valve.

Insulation gate valve main parts materials

Parts material	material
	BZ41Y-16I-25I-40I	BZ41Y-16I-25I-40I	BZ41Y-16I-25I-40I
Valve body, valve made	Chrome-molybdenum steel
Valve plate	Alloy steel + cemented carbide	Chromium nickel titanium steel	Chromium nickel molybdenum titanium steel
Stem	alloy steel
Stem nut	Aluminum and iron bronze
Hand wheel	Gray cast iron, malleable cast iron

 

Standard Specification for Performance of Insulation gate valve

model	Nominal pressure				Operating temperature ℃	Applicable media
		Strength (water) (MPa)	Seal (water) (MPa)	Low pressure seal (air) (MPa)
BZ41H-16C         BZ41W-16P (R)	1.6	2.4	1.8	0.6	≤ 200	Acid and alkali
BZ41W-25P (R)	2.5	3.8	2.8	0.6	≤ 200	Acid and alkali
BZ41W-40P (R)	4.0	6.0	4.4	0.6	≤ 200	Acid and alkali
BZ41W-64P (R)	6.4	9.6	7.0	0.6	≤ 200	Acid and alkali

Dimensions and connection dimensions

Model	Nominal diameter DN	size
		L	D	D1	D2	bf	Z-Φd	H	Do
BA41W-16P (R)	15	130	95	65	45	16-2	4-14	170	120
	20	150	105	75	55	16-2	4-14	190	140
	25	160	115	85	65	16-2	4-14	205	160
	32	180	135	100	78	18-2	4-18	270	180
	40	200	145	110	85	18-3	4-18	310	200
	50	250	160	125	100	18-3	4-18	358	240
	65	265	180	145	120	18-3	4-18	373	240
	80	280	195	160	135	20-3	8-18	435	280
	100	300	215	180	155	20-3	8-18	500	300
	125	325	245	210	185	22-3	8-18	614	320
	150	350	280	240	210	24-3	8-23	674	360
	200	400	335	295	265	26-3	12-23	818	400
	250	450	405	355	320	30-3	12-25	969	450
	300	500	460	410	375	30-4	12-25	1145	560

Model	Nominal diameter DN	size
		L	D	D1	D2	D6	bf	Z-Φd	H
BA41W-40P (R)	15	130	95	65	45	40	16-2	4-14	135
	20	150	105	75	55	51	16-2	4-14	190
	25	160	115	85	65	58	16-2	4-14	205
	32	180	135	100	78	66	18-2	4-18	270
	40	200	145	110	85	76	18-3	4-18	310
	50	250	160	125	100	88	20-3	4-18	371
	65	280	180	145	120	110	22-3	8-18	39
	80	310	195	160	135	121	22-3	8-18	455
	100	350	230	190	160	150	24-3	8-23	551
	125	400	270	220	188	176	28-3	8-25	628
	150	450	300	250	218	204	30-3	8-25	708
	200	550	375	320	282	260	38-3	12-30	885
	250	650	445	385	345	313	42-3	12-24	960

Model	Nominal diameter DN	size
		L	D	D1	D2	D6	bf	Z-Φd	H
BA41W-64P (R)	15	130	105	75	55	41	18-2	4-14	140
	20	150	125	90	68	51	20-2	4-18	195
	25	160	135	100	78	58	22-2	4-18	210
	32	180	150	110	82	66	24-2	4-23	280
	40	200	165	125	95	76	24-3	4-23	328
	50	250	175	135	105	88	26-3	4-23	390
	65	280	200	160	130	110	28-3	8-23	410
	80	310	210	170	140	121	30-3	8-23	485
	100	350	250	200	168	150	32-3	8-25	590
	125	400	295	240	202	176	36-3	8-30	688
	150	450	340	280	240	204	38-3	8-34	768
	200	550	405	345	300	260	44-3	12-34	972
	250	650	470	400	350	313	48-3	12-41	1059