Cryogenic Globe Valve - Knowledge - GNEE Multinational Trade

A cryogenic globe valve is a single-seat valve built to BS 1873 and BS 6364 for service down to -196 °C. Use it when flow has to be set rather than only stopped: pump discharge, tank fill and drain, and let-down stations on LNG, LPG and air separation plants. Size and class do not move independently: Class 1500 ends at NPS 4, and NPS 18 is 300 at most.

Specifications

The range below is what the shop quotes from existing patterns; anything outside it is a new pattern, which moves tooling cost and lead time before it moves unit price.

Supply range and governing standards
Parameter	Range or value	Standard or note
Design standard	BS 1873, ASME B16.34	API 623 for flanged steel globe valves
Cryogenic standard	BS 6364, ISO 28921-1:2022	Extension length and test sequence
Pressure class	Class 150, 300, 600, 900, 1500	Class 2500 on request
Size range	NPS 1/2-24 (DN 15-600)	Forged to NPS 2, cast from NPS 2
Design temperature	-46 °C, -101 °C, -196 °C by body grade	Set by the impact-tested body material
Body material	A352 LCC, A352 LC3, A351 CF8M, A182 F316	LC1, LC2 and CF3M on request
Trim	316 stem, CoCr-faced plug and seat ring	Hard facing depth stated on the drawing
Body pattern	Straight, Y-pattern, angle	Y-pattern above NPS 4 where pressure drop matters
End connections	RF or RTJ flanged, butt weld	ASME B16.5 / B16.25, extended weld ends for cold boxes
Flow direction	Under the seat as standard	Arrow cast on the body; not reversible in the field
Seat leakage	ISO 5208 Rate D metal seat	Rate A only with a soft insert
Marking	MSS SP-25	Grade, class, size, heat number, minimum temperature

Temperature Bands and Body Material

Five impact test temperatures cover the range, and each belongs to a grade rather than a valve type. The trap is that a throttling valve does not see the pipeline temperature: the body metal follows the fluid after the seat, not the line design figure on the datasheet.

Body grades, impact test temperatures and where each one is used
Grade	UNS	Impact test	Service band	Typical duty
A352 LCB	J03303	-46 °C	-29 to -46 °C	LPG and ammonia transfer
A352 LCC	J02505	-46 °C	-29 to -46 °C	LPG spheres, propylene
A352 LC1	J12522	-59 °C	-46 to -59 °C	Cold separation, CO2 plants
A352 LC2	J22500	-73 °C	-59 to -73 °C	Ethylene and propylene refrigeration
A352 LC3	J31550	-101 °C	-73 to -101 °C	Ethylene let-down, LNG boil-off
A351 CF8M	J92900	-196 °C	-101 to -196 °C	LNG, liquid nitrogen, oxygen
A182 F316	S31600	-196 °C	-101 to -196 °C	Small-bore forged bodies

A let-down station makes the choice twice. LNG entering at 40 bar and leaving at 5 bar is colder after the seat than before it, so the grade is set by the lowest metal temperature downstream, not by the tank temperature upstream.

Below -29 °C the class table gives no higher rating as the metal gets colder: ASME B16.34 clause 2.3.2 caps a rating below -29 °C at the -29 °C value. What changes below that line is the impact test obligation, not the bar figure.

Design Standards

Basic Design	API 602/BS 1873/BS 6364 SPE 77 200
Face to Face/End to End	ASME B16.10
Flange End	ASME B16.5
Buttwelding End	ASME B16.25
Pressure-Temperature Rating	ASME B16.34
Inspection and Test	API 598

design features

1. Extended bonnet to minimize the heat conduction & transfer from the cold zone and keep the stem packing free of cold formation for providing a secure seal.
2. Drip plate fitting to minimize ice accumulation on the extension and prevent possible damage to insulation.
3. Fugitive Emission packing design.
4. Hard-faced seat/disc for preventing wear and improving durability.
5.Cavity pressure relief design to prevent excessive pressure rise in cavity.
6. Low torque design.
7. Optional non-metallic material for sealing face.
8. Tapered disc design.

Body Patterns: Straight, Y and Angle

Three patterns cover the same size range and differ only in the flow path, which is the one thing that changes pressure drop in a globe body. Straight pattern is the reference point.

Body pattern, flow path and where each one belongs
Pattern	Size range	Flow path	Pressure drop	Pigging	Where used
Straight (T-pattern)	NPS 1/2-24	S-shaped: in, up through the seat, out	Highest of the three	Not possible	General isolation and throttling, NPS 2 and below
Y-pattern	NPS 2-24	Stem set at about 45° to the run, bore nearly straight	Lower than straight pattern	Not possible	Pump discharge, cold boxes, lines where the drop is budgeted
Angle	NPS 2-16	Inlet and outlet at 90°, seat at the corner	Lower than straight pattern, one elbow saved	Not possible	Cold box corners, vessel nozzles, LNG send-out skids

Y-pattern is the usual answer above NPS 4, where a straight body would carry the whole drop. Which pattern fits a skid is a layout question; the drop is not.

Drawing & Material of Construction-Forged Steel

Part No.	Part Name	Materials
1	Body	ASTM A182 F316
2	Gasket	SS316+Graphite
3	Bolt	ASTM A320 B8M
4	Stem	ASTM A182 F316
5	Extended Bonnet	ASTM A182 F316
6	Bonnet	ASTM A182 F316
7	Packing	Graphite
8	Gland	ASTM A276 316
9	Yoke Nut	ASTM A276 410
10	Nameplate	Aluminium
11	Handwheel Nut	Stainless Steel
12	Handwheel	Carbon Steel
13	Gland Nut	ASTM A194 8
14	Gland Flange	ASTM A182 F316
15	Gland Eyebolt	ASTM A320 B8
16	Disc	ASTM A182 F316+HF*

Drawing & Material of Construction-Cast Steel

Part No.	Part Name	Materials
1	Body	ASTM A351 CF8M
2	Seat	ASTM A182 F316+HF*
3	Thrust Washer	ASTM A276 type 316
4	Disc	ASTM A182 F316+HF*
5	Nut	ASTM A276 type 316
6	Stem	ASTM A182 F316
7	Ring Joint Gasket	ASTM A182 F316
8	Backseat Bushing	ASTM A276 type 316
9	Bonnet Stud	ASTM A320 B8 (CL.2)
10	Bonnet Nut	ASTM A194 8
11	Packing Box Ring	ASTM A276 type 316
12	Packing	Graphite
13	Gland	ASTM A276 type 316
14	Gland Flange	ASTM A351 CF8M
15	Eye Bolt	ASTM A320 B8 (CL.2)
16	Stem Nut	ASTM A194 8
17	Screw	A439-D2
18	Bonnet	ASTM A351 CF8M
19	Lantern Ring	ASTM A276 type 304
20	Retainer Plate	Carbon Steel
21	Relation Plate	Carbon Steel
22	Handwheel Nut	ASTM A276 type 316
23	Handwheel	Cast Iron
24	Drip Plate	ASTM A240 type 316

Dimension & Weight

info-657-348

CLASS 150

Size		L-RF		L-BW		D		H		W		Approx Weight (RF)
NPS	DN	mm	in	mm	in	mm	in	mm	in	mm	in	kg	lb
1/2	15	102	4.25	102	4.25	13	0.51	507	19.96	160	6.30	7	15
3/4	20	118	4.63	118	4.63	19	0.75	518	20.39	160	6.30	11	24
1	25	127	5.00	127	5.00	26	1.00	553	21.77	160	6.30	20	44
1 1/4	32	140	5.50	140	5.50	32	1.25	631	24.84	225	8.86	23	51
1 1/2	40	165	6.50	165	6.50	38	1.50	648	25.51	225	8.86	27	60
2	50	203	8.00	203	8.00	51	2.00	739	29.09	225	8.86	49	108
3	80	241	9.50	241	9.50	76	2.99	841	33.11	275	10.83	61	136
4	100	292	11.50	292	11.50	102	4.02	902	35.51	325	12.80	73	161
6	150	406	16.00	406	16.00	152	5.98	1150	45.28	350	13.78	160	353
8	200	495	19.50	495	19.50	203	7.99	1202	47.32	400	15.75	190	419
10	250	622	24.50	622	24.50	254	10.00	1320	51.97	450	17.72	326	720
12	300	670	26.38	670	26.38	305	12.01	1388	54.65	500	19.69	420	926
14	350	787	31.00	787	31.00	337	13.25	1610	63.38	600	23.62	561	1237
16	400	914	36.00	914	36.00	387	15.24	1905	74.98	700	27.56	1172	2583
18	450	1041	41.00	1041	41.00	432	17.01	1927	75.87	750	29.53	1716	3784
20	500	1168	46.00	1168	46.00	489	19.25	2022	79.61	#610	24.02	2402	5295
24	600	1270	50.00	1270	50.00	591	23.25	2323	91.46	#810	31.89	4630	10207

CLASS 300

Size		L-RF		L-BW		D		H		W		Approx Weight (RF)
NPS	DN	mm	in	mm	in	mm	in	mm	in	mm	in	kg	lb
1/2	15	152	6.00	152	6.00	13	0.51	550	21.65	160	6.30	11	24
3/4	20	178	7.00	178	7.00	19	0.75	575	22.64	160	6.30	14	31
1	25	203	8.00	203	8.00	25	0.98	587	23.11	160	6.30	24	42
1 1/4	32	229	9.00	229	9.00	32	1.25	631	24.84	225	8.86	27	58
1 1/2	40	254	10.00	254	10.00	38	1.50	659	25.94	225	8.86	40	88
2	50	305	12.00	305	12.00	51	2.00	739	29.09	225	8.86	44	97
3	80	381	15.00	381	15.00	76	2.99	841	33.11	325	12.80	88	143
4	100	445	17.50	445	17.50	102	4.02	888	34.96	350	13.78	110	174
6	150	559	22.00	559	22.00	152	5.98	1088	42.83	425	16.73	236	384
8	200	641	25.28	641	25.28	203	7.99	1178	46.38	500	19.69	286	431
10	250	711	28.00	711	28.00	254	10.00	1440	56.69	550	21.65	855	1357
12	300	813	32.00	813	32.00	305	12.01	1440	56.69	700	27.56	1387	2255
14	350	978	38.50	978	38.50	337	13.25	1653	65.08	700	27.56	2256	3686
16	400	1106	43.50	1106	43.50	387	15.24	1772	69.76	750	29.53	2256	3686
18	450	914	36.00	914	36.00	432	17.01	1714	67.48	850	33.46	2025	4458
20	500	978	38.50	978	38.50	483	19.02	1772	69.76	#610	24.02	2234	4921
24	600	1067	42.00	1067	42.00	483	19.02	1889	74.37	#810	31.89	3669	8089

CLASS 600

Size		L-RF		L-BW		D		H		W		Approx Weight (RF)
NPS	DN	mm	in	mm	in	mm	in	mm	in	mm	in	kg	lb
1/2	15	165	6.50	165	6.50	13	0.51	521	20.51	160	6.30	14	31
3/4	20	191	7.50	191	7.50	19	0.75	566	22.28	160	6.30	19	42
1	25	216	8.50	216	8.50	25	0.98	585	22.28	200	7.87	22	49
1 1/4	32	241	9.50	241	9.50	32	1.25	631	24.84	225	8.86	27	60
1 1/2	40	267	10.50	267	10.50	38	1.50	648	25.51	225	8.86	50	110
2	50	356	14.00	356	14.00	51	2.00	739	29.09	325	12.80	74	174
3	80	432	17.00	432	17.00	76	2.99	842	33.15	350	13.78	117	260
4	100	521	20.50	521	20.50	102	4.02	902	35.51	430	16.93	191	419
6	150	622	24.50	622	24.50	152	5.98	1137	44.76	500	19.69	277	611
8	200	660	26.00	660	26.00	203	7.99	1202	47.32	500	19.69	472	1160
10	250	787	31.00	787	31.00	248	9.76	1470	57.87	600	23.62	862	1905
12	300	838	33.00	838	33.00	298	11.73	1725	67.91	800	31.50	1995	3905

CLASS 900

Size		L-RF		L-BW		D		H		W		Approx Weight (RF)
NPS	DN	mm	in	mm	in	mm	in	mm	in	mm	in	kg	lb
2	50	368	14.50	368	14.50	48	1.89	877	34.53	325	12.80	85	187
3	80	381	15.00	381	15.00	73	2.87	869	34.25	350	13.78	157	346
4	100	457	18.00	457	18.00	98	3.86	992	39.06	425	16.73	272	601
6	150	610	24.00	610	24.00	146	5.75	1068	42.05	500	19.69	813	1804
8	200	737	29.00	737	29.00	190	7.48	1188	46.77	625	24.61	1045	2301
10	250	914	36.00	914	36.00	234	9.21	1410	55.51	750	29.53	3045	6712
12	300	991	39.00	991	39.00	282	11.14	--	--	--	--	--	--
12	300	965	38.00	965	38.00	283	11.14	1724	67.85	--	--	3971	4389

CLASS 1500

Size		L-RF		L-BW		D		H		W		Approx Weight (RF)
NPS	DN	mm	in	mm	in	mm	in	mm	in	mm	in	kg	lb
2	50	368	14.50	368	14.50	48	1.89	877	34.53	325	12.80	85	187
3	80	470	18.50	470	18.50	70	2.75	948	37.32	380	14.96	205	451
4	100	546	21.50	546	21.50	92	3.62	1120	44.09	500	19.69	309	680
6	150	705	27.75	705	27.75	137	5.39	1130	44.49	700	27.56	641	1413
8	200	832	32.75	832	32.75	178	7.01	1512	59.53	#610	24.02	1261	2780

CLASS 2500

Size		L-RF		L-BW		D		H		W		Approx Weight (RF)
NPS	DN	mm	in	mm	in	mm	in	mm	in	mm	in	kg	lb
2	50	451	17.76	451	17.76	38	1.50	866	34.09	350	13.78	172	3228
3	80	578	22.76	578	22.76	57	2.25	1135	44.69	450	17.72	228	5893
4	100	673	26.50	673	26.50	73	2.87	1411	55.51	500	19.69	505	8103
6	150	914	36.00	914	36.00	111	4.37	1712	67.40	610	24.02	2102	4634
8	200	1022	40.24	1022	40.24	146	5.75	2715	106.89	610	24.02	2482	10743

Test and inspection

valve-testing-workshop

Send the size, the class, the design minimum temperature and whether the valve throttles or only isolates. The first three pick the body grade; the fourth decides the plug profile and the seat facing. Email the four figures to sale@gneetube.com or call +86 158 2468 7445.

FAQ

What is a cryogenic globe valve used for?

Flow control on cold lines rather than isolation alone: pump discharge, tank fill and drain, let-down and bypass on LNG, LPG, air separation and liquid nitrogen systems. The single seat and short stroke let it hold a position, which a gate valve cannot do without wearing its wedge.

Can it be used to throttle at -196 °C?

Yes, with a hard-faced seat ring and a plug profile chosen for the drop, and with the body grade set by the temperature after the seat. Throttling cools the fluid downstream, so a valve on a -160 °C line can still see a lower metal temperature.

Which way should the flow go?

Under the seat as standard, with the arrow pointing away from the tank on a fill or drain line so liquid stays trapped below the seat when closed. The packing then sits on the downstream side.

Is a globe valve tighter than a gate valve at low temperature?

Both are metal-seated and both are quoted to ISO 5208 Rate D unless a soft insert is used. The difference is the seating mechanism: the globe plug is held by stem load on one seat, the gate wedge is driven between two.

What do you need to quote a cryogenic globe valve?

Four figures: size and class, design minimum temperature, fluid, and whether the valve throttles or only isolates. Pattern, plug profile, extension length, leakage and torque come back with the drawing.