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Low temperature gate valve

Product Overview

Low temperature gate valve is suitable for methane, liquid natural gas, ethylene, carbon dioxide, liquid ammonia, liquid oxygen, liquid nitrogen, liquid hydrogen and other low-temperature media.

Structural characteristics

1. In order to prevent abnormal pressure rise in the middle chamber, a pressure relief hole is set at the inlet side of the ram;
2. The top length of the valve cover is determined according to the working temperature of the valve to ensure the reliable sealing of the valve stem packing;
3. The materials of packing, gasket and other parts should be selected reasonably according to the working temperature;
4. The chemical composition and low temperature impact toughness of the material should be strictly controlled;
5. It adopts a variety of piping flange standards and sealing face type, which is suitable for various engineering needs.

Execution standard

Design specification: JB/T7749
Structure length: GB/T12221
Connection flange: JB/T79.1, HG/T20592, GB/T9113
Test and inspection: JB/T9092, GB/T13927
Pressure-temperature: GB/T12224

Performance parameter

Nominal diameter: DN20 ~ 400mm
Nominal pressure: pn1.6 ～ 10MPa
Applicable temperature: - 45 ℃ ~ 196 ℃
Main materials: C3, LCB, LCC, 1Cr18Ni9Ti
Applicable media: methane, liquid natural gas, ethylene, carbon dioxide, liquid ammonia, liquid oxygen, liquid fluorine, liquid hydrogen and other low-temperature media

Product Dimensions

DN(mm)	L	D	Di	D2	b	Z-Φd	H	Do	WT(kg)
DN(mm)		DZ40Y-16P/R/PL/RL		DZ640Y-16P/R/PL/RL		DZ940Y-16P/R/PURL
20	150	105	75	55	14	4-Φ14	320	140	6
25	160	115	85	65	14	4-Φ14	350	160	7
32	180	135	100	78	16	4-Φ18	385	180	9
40	200	145	110	85	16	4-Φ18	420	200	15
50	250	160	125	100	16	4-Φ18	540	240	30
65	265	180	145	120	18	4-Φ18	610	240	34
80	280	195	160	135	20	8-Φ18	690	280	45
100	300	215	180	155	20	8-Φ18	780	300	64
125	325	245	210	185	22	8-Φ18	930	320	110
150	350	280	240	210	24	8-Φ23	980	360	135
200	400	335	295	265	26	12-Φ23	1180	400	195
250	450	405	355	320	30	12-Φ25	1390	450	275
300	500	460	410	375	30	12-Φ25	1620	560	380
350	550	520	470	435	34	16-Φ25	1810	640	594
400	600	580	525	485	36	16-Φ30	1970	640	725
DZ40Y-25P/R/PL/RL DZ640Y-25P/R/PL/RL DZ940Y-25P/R/PL/RL
20	150	105	75	55	16	4-Φ14	320	140	6
25	160	115	85	65	16	4-Φ14	350	160	8
32	180	136	100	78	18	4-Φ18	385	180	10
40	200	145	110	85	18	4-Φ18	420	200	16
50	250	160	125	100	20	4-Φ18	540	240	30
65	265	180	145	120	22	4-Φ18	610	240	35
80	280	195	160	135	22	8-Φ18	690	280	47
100	300	230	190	160	24	8-Φ23	780	300	65
125	325	270	220	188	28	8-Φ25	930	320	110
150	350	300	250	218	30	8-Φ25	980	360	135
200	400	360	310	278	34	12-Φ25	1180	400	215
250	450	425	370	332	36	12-Φ30	1390	450	295
300	500	485	430	390	40	16-Φ30	1620	560	400
350	550	550	490	448	44	16-Φ34	1810	640	630
400	600	610	550	505	48	16-Φ34	1990	640	910

◆Main connection dimensions

DN(mm)	L	D	D1	D2	D6	b	Z-Φd	H	Do	WT(kg)
				DZ40Y-40P/R/PL/RL
20	150	105	75	55	51	16	4-Φ14	330	140	7
25	160	115	85	65	58	16	4-Φ14	360	160	9
32	180	135	100	78	66	18	4-Φ18	440	180	11
40	200	145	110	85	76	18	4-Φ18	455	200	19
50	250	160	125	100	88	20	4-Φ18	575	280	28
65	280	180	145	120	110	22	8-Φ18	635	280	35
80	310	195	160	135	121	22	8-Φ18	715	320	50
100	350	230	190	160	150	24	8-Φ23	815	360	74
125	400	270	220	188	176	28	8-Φ25	965	400	115
150	450	300	250	218	204	30	8-Φ25	1025	400	135
200	550	375	320	282	260	38	12-Φ30	1225	450	215
250	650	445	385	345	313	42	12-Φ34	1440	560	184
300	750	510	450	408	364	46	16-Φ34	1665	640	405
350	850	570	510	465	422	52	16-Φ34	1880	640	600
400	950	655	585	535	474	58	16-Φ41	2050	720	750
DZ40Y-64P/R/PL/RL
20	190	125	90	68	51	20	4-Φ18	330	100	8
25	210	135	100	78	58	22	4-Φ18	360	180	13
32	230	150	110	82	66	24	4-Φ23	410	180	24
40	240	165	125	95	76	24	4-Φ23	480	200	32
50	250	175	135	105	88	26	4-Φ23	585	200	39
65	280	200	160	160	110	28	8-Φ30	690	250	45
80	310	210	170	140	121	30	8-Φ23	745	300	60
100	350	250	200	168	150	32	8-Φ25	885	300	90
125	400	295	240	202	176	36	8-Φ30	985	350	140
150	450	340	280	240	204	38	8-Φ34	1050	350	205
200	550	405	345	300	260	44	12-Φ34	1240	400	330
250	650	470	400	352	313	48	12-Φ41	1460	560	468
300	750	530	460	412	364	54	16-Φ41	1690	640	600
DZ40Y-100P/R/PL/RL
25	210	135	100	78	58	24	4-Φ18	365	200	18
32	230	150	110	82	66	24	4-Φ23	420	240	27
50	250	195	145	112	88	28	4-Φ25	630	360	45
65	280	220	170	138	100	32	8-Φ25	700	400	60
80	310	230	180	148	121	34	8-Φ25	760	400	76
100	350	265	210	172	150	38	8-Φ23	900	400	128

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