DJ41Y low temperature Globe Valve

The material of DJ41Y low temperature globe valve working at low temperature should ensure its low temperature performance, mainly to ensure its cold shock strength. The valve trim must be properly selected to have sufficient cold shock strength to prevent breakage. Alloy steels of C and Cr lose their impact strength quickly when they are lower than -20°C, so the use temperature is limited to -30°C and -50°C, respectively. Nickel steel with a Ni content of 3.5% can be used up to -100°C, and nickel steel with a Ni content of 9% can be used up to -196°C. Austenitic stainless steel, nickel, Monel, Hastelloy, titanium, aluminum alloys and bronze can be used to lower temperatures (-273°C).

Executive standard:

Design and Manufacturing	Structure length	Flange size	pressure-temperature	test-inspection
JB/T7749	GB12221	JB79	GB9131	JB/T9092

 

Pressure test:

Nominal pressure PN	1.6	2.5	4.0
Strength test	2.4	3.8	6.0
Water tightness test	1.8	2.8	4.4
Upper sealing test	1.8	2.8	4.4
Air tightness test	0.4-0.7

 

Part material and performance:

body cover plate	valve stem	Sealing surface	Gasket	packing	Working temperature ℃	Applicable media
LCB	1Cr17Ni12	DTL/DTL	1Cr13/flexible graphite low temperature asbestos	PTFE Dip tetrafluoroethylene Asbestos rope Flexible graphite	-46	Propane/Propylene methanol, ethane Gas/Ammonia
LC1					-60
LC2					-73
LC3	1Cr18Ni9Ti				-101
LC4					-115
LC8					-196

 

Main dimensions:

1.6MPa	DN	L	D	D1	D2	b	n-Φd	H			D0
								-46℃	4-101℃	-196℃
Raised Face Flange RF DJ41Y-16L DJ41Y-16L C1 DJ41Y-16L C2 DJ41Y-16L C3 DJ41Y-16L C4 DJ41Y-16P DJ41Y-16R	50	230	160	125	100	16	4-Φ18	460	480	520	240
	65	290	180	145	120	18	4-Φ18	475	505	525	280
	80	310	195	160	135	20	8-Φ18	520	550	590	280
	100	350	215	180	155	20	8-Φ18	545	575	615	320
	125	400	245	210	185	22	8-Φ18	590	620	660	360
	150	480	280	240	210	24	8-Φ23	650	680	730	400
	200	600	335	295	265	26	12-Φ23	850	880	930	400
	250	730	405	355	320	30	12-Φ25	956	986	1036	450
	300	850	460	410	375	30	12-Φ25	1095	1125	1175	500
2.5MPa	50	230	160	125	100	20	4-Φ18	460	460	520	240
Raised Face Flange RF DJ41Y-25L DJ41Y-25L C1 DJ41Y-25L C2 DJ41Y-25L C3 DJ41Y-25L C4 DJ41Y-25P DJ41Y-25R	65	290	180	145	120	22	8-Φ18	475	505	525	280
	80	310	195	160	135	22	8-Φ18	520	550	590	280
	100	350	230	190	160	24	8-Φ23	545	575	615	320
	125	400	270	220	188	28	8-Φ25	590	620	660	360
	150	480	300	250	218	30	8-Φ25	650	680	730	400
	200	600	360	310	278	34	12-Φ25	850	880	930	400
	250	730	425	370	332	36	12-Φ30	956	986	1036	450
	300	850	485	430	390	40	16-Φ30	1095	1125	1175	500
4.0MPa	50	230	160	125	100	20	4-Φ18	483	504	546	240
Raised Face Flange RF DJ41Y-40L DJ41Y-40L C1 DJ41Y-40L C2 DJ41Y-40L C3 DJ41Y-40L C4 DJ41Y-40P DJ41Y-40R	65	290	180	145	120	22	8-Φ18	499	530	551	280
	80	310	195	160	135	22	8-Φ18	546	578	620	280
	100	350	230	190	160	24	8-Φ23	572	604	646	320
	125	400	270	220	188	28	8-Φ25	620	651	693	360
	150	480	330	2850	218	30	8-Φ25	683	741	767	400
	200	600	375	320	282	38	12-Φ30	893	924	977	400
	250	730	445	385	345	42	12-Φ34	1004	1035	1088	450
	300	850	510	450	408	46	16-Φ34	1150	1181	1234	500