Cryogenic Gate Valve

Material:Stainless Steel (SS304, SS316 for corrosion resistance)

Size Range: DN20~DN400

Connection Options: Flanged

Working Pressure: PN16~PN100

Working Temperature: –196°C

Sealing Options:Metal-to-Metal, Resilient Seat, Graphite, PTFE

Manufacturing Method: Forged

Applicable Medium: Water, Oil, Gas, Steam, Chemical Fluids

Product Overview

The cryogenic gate valve is specifically engineered for low-temperature applications, ensuring safe and reliable flow control in cryogenic systems handling liquefied gases such as LNG, liquid oxygen, nitrogen, and hydrogen. Made from stainless steel, it features an extended bonnet design to protect the stem from freezing media, minimizing heat transfer and preventing frost damage. With a rising stem and wedge-type gate, it provides tight shut-off and minimal flow resistance. Ideal for use in petrochemical, air separation, and LNG storage facilities, the valve offers robust performance under extreme cold conditions down to –196°C.

Product Features

Extended Bonnet Design: Protects stem seals by isolating them from cryogenic media, preventing frost and heat loss.
Low-Temperature Resilience: Operates reliably in environments as cold as –196°C, ideal for LNG, LOX, LIN, and LAr systems.
Tight Shut-Off: Wedge-type gate ensures secure sealing with minimal leakage under both low and high pressures.
Stainless Steel Construction: Corrosion-resistant body material ensures durability and compatibility with cryogenic fluids.
Rising Stem Configuration: Allows clear visual indication of valve position for enhanced operational safety.
Blowout-Proof Stem: Ensures safety under pressure and prevents stem ejection.
Compliance: Meets international standards for cryogenic valve performance and safety.

Specification Parameters

◇ Main External and Connection Dimension

DN	L	D	D1	D2	b	Z–φd	H	Do	Weight (kg)
DZ40Y-16P
20	150	105	75	55	14	4–φ14	320	140	6
25	160	115	85	65	16	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	550	380
350	550	520	470	435	34	16–φ25	1810	640	594
400	600	580	525	485	36	16–φ30	1970	640	725

DN	L	D	D1	D2	b	Z–φd	H	Do	Weight (kg)
DZ40Y-25P
20	150	105	75	55	16	4–φ14	320	140	6
25	160	115	85	65	16	4–φ14	350	160	8
32	180	135	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	8–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	350	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	450	400
350	550	550	490	448	44	16–φ34	1810	550	630
400	600	610	550	505	48	16–φ34	1990	640	910

DN	L	D	D1	D2	D6	b	Z–φd	H	Do	WT (kg)
DZ40Y-40P
20	150	105	75	55	51	16	4–φ14	140	330	7
25	160	115	85	65	58	16	4–φ14	160	360	9
32	180	135	100	78	66	18	4–φ18	180	440	11
40	200	145	110	85	76	18	4–φ18	200	455	19
50	250	160	125	100	88	20	4–φ18	280	575	28
65	280	180	145	120	110	22	8–φ18	280	635	35
80	310	195	160	135	121	22	8–φ18	320	715	50
100	350	230	190	160	150	24	8–φ23	360	815	74
125	400	270	220	188	176	28	8–φ25	400	965	115
150	450	300	250	218	204	30	8–φ25	400	1025	135
200	550	375	320	282	260	38	12–φ30	450	1225	215
250	650	445	385	345	313	42	12–φ34	560	1440	184
300	750	510	450	408	346	46	16–φ34	640	1665	405
350	850	570	510	465	422	52	16–φ34	640	1880	600
400	950	655	585	535	474	58	16–φ41	720	2050	750

DN	L	D	D1	D2	D6	b	Z–φd	H	Do	WT (kg)
DZ40Y-64P
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–φ23	690	250	45
80	310	210	170	140	121	30	8–φ23	745	320	60
100	350	250	200	168	150	32	8–φ25	885	350	90
125	400	295	240	202	176	36	8–φ30	985	380	140
150	450	340	280	240	204	38	8–φ34	1050	400	205
200	550	405	345	300	260	44	12–φ34	1240	500	330
250	650	470	400	352	313	48	12–φ41	1460	550	468
300	750	530	460	412	364	54	16–φ41	1690	600	600

DN	L	D	D1	D2	D6	b	Z–φd	H	Do	WT (kg)
DZ40Y-100P
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	110	32	8–φ25	700	400	60
80	310	230	180	148	211	34	8–φ25	760	400	76
100	350	265	210	172	150	38	8–φ30	900	400	128

Notes

DN = Nominal Diameter (mm)
L = Face-to-face length (mm)
D = Flange outer diameter (mm)
D1, D2 = Bolt circle and flange bore diameters (mm)
D6 = Raised face or sealing surface diameter (mm)
b = Flange thickness (mm)
Z–φd = Number and diameter of bolt holes
H = Overall valve height (mm)
Do = Handwheel diameter (mm)
WT = Weight (kg)

Specification Applications

Cryogenic gate valves are widely used in industries that handle liquefied gases at extremely low temperatures. Typical applications include:

LNG Plants and Terminals: For isolating pipelines and ensuring safe handling of liquefied natural gas.
Air Separation Units: Used in the production and storage of liquid oxygen, nitrogen, and argon.
Petrochemical and Refinery Plants: For controlling cryogenic media in processing systems.
Liquid Hydrogen Systems: Ensures safe operation in aerospace, research, and energy applications.
Cryogenic Storage and Transportation: Installed in tanks, pipelines, and trailers to maintain secure flow control.

These valves are essential for maintaining system integrity, preventing leakage, and ensuring operational safety in cryogenic environments down to –196°C.

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