Forged DBB Trunnion-Mounted Cryogenic Ball Valve with Extended Stem and Turbine

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Forged DBB Trunnion-Mounted Cryogenic Ball Valve with Extended Stem and Turbine

Size: 2" to 36" (DN50–DN900)
Nominal Pressure: Class 900 (Optional Class 150/300/600/1500/2500)
Body Material: F304 Stainless Steel (Customizable materials available)
Seats: PEEK, PCTFE, PTFE (Customizable)
Ball Type: Trunnion-mounted, 2~3 Pieces
Operating Temperature: -46°C to +200°C (Material dependent)
Design Standards: GB/T14925, BS5351, ASME B16.34
Connection: Flanged
Drive Mode: Handle, Worm Gear, Electric, Pneumatic, Hydraulic
Brand: SLVCN

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SLVCN

Product Description

Product Description

SLVCN Forged DBB Trunnion-Mounted Cryogenic Ball Valve is engineered for extreme low-temperature and high-pressure environments. Featuring an extended stem and turbine design, it ensures smooth operation and reliable sealing in LNG, Liquid Nitrogen, and Liquid Oxygen transport. Rigorous in-house cryogenic testing guarantees top performance in the harshest conditions.

With over 30 years of expertise, SLVCN delivers high-performance valves trusted by industries worldwide. Our products are rigorously tested for ultra-low temperatures and high pressures, ensuring unmatched reliability.

Key Features

✓ Safety and Leak-Free Design

Double-Block-and-Bleed(DBB), Anti-Static, Fire-Safe (API 607), Anti-Blowout Stem, and Low Fugitive Emission Packing (ISO 15848) provide comprehensive protection for maximum safety and leak prevention.

✓ Cryogenic Performance & Sealing Reliability

PCTFE Cryogenic Seat + Lip-Seal Compensation ensures tight, leak-free sealing even in extreme cold conditions below -196°C.

✓ Proven Durability

Deep-Cryo Treatment for all pressure components and an extended cryogenic stem ensure reliable operation in temperatures as low as -46°C, while withstanding both extreme cold and high pressure.

✓ In-House Cryogenic Testing

Each valve is rigorously tested in our in-house cryogenic facility to guarantee dependable performance in the most demanding low-temperature environments.

✓ Versatile Applications

Ideal for cryogenic fluids like Liquid Helium (LHe), Liquid Hydrogen (LH₂), LNG, Liquid Nitrogen (LN₂), and Liquid Oxygen (LOX), as well as high-flow pipelines and large storage tanks.

✓ Customizable Options

Available in a wide range of sizes and materials (A350 LF2, A350 LF3, AISI 4130, 4140, A182 F304, F316, F316L, A182 F51, F53, Inconel 625, Incoloy 800, Hastelloy C, etc.) to meet various industrial needs.

Parts List

Class900

1	Right Body	9	Lip Seal	17	Key	25	Packing pad	33	Thrust Bearing
2	Nut	10	Seat Retainer	18	Bolt	26	Drip Tray	34	Stem Bearing
3	Pin	11	Lip Seal	19	Stud	27	Packing Box	35	Trunnion Support
4	Gasket	12	Bolt	20	Nut	28	Nut	36	Body
5	Spring	13	Seat Pressure Ring	21	Stud	29	Stud	37	Drain Valve
6	Stud	14	Seat	22	Gland	30	Stem
7	Thrust Washer	15	Ball	23	Packing Ring	31	Thrust Washer
8	Lip Seal	16	Worm-Gear	24	Packing	32	Stem Bearing

Technical Specifications

block and bleed valve Dimensions: Class 900 - Full Port

Size	Bore		Face to Face		D in/mm	D1 in/mm	Weight
NPS/DN	B1 in/mm	B2 in/mm	RF in/mm	RT J in/mm	D in/mm	D1 in/mm	Model FF lb/kg	Model FW lb/kg
2"	1.94	1.94	14.5	14.63	8.5	8.5	137	137
50	49	49	368	371	216	216	62	62
3"	2.94	2.94	15	15.13	9.5	9.5	205	205
80	74	74	381	384	241	241	93	93
4"	3.94	3.94	18	18.13	11.5	11.5	337	337
100	100	100	457	460	291	291	153	153
6"	5.94	5.94	24	24.13	15	15	750	750
150	150	150	610	613	381	381	340	340
8"	7.94	7.94	29	29.13	18.9	18.5	1482	1433
200	201	201	737	740	480	470	672	650
10"	9.94	9.94	33	33.13	21.5	21.5	2061	2017
250	252	252	838	841	546	546	935	915
12"	11.94	11.94	38	38.13	25	24	3098	2976
300	303	303	965	968	635	610	1405	1350
14"	12.69	12.69	40.5	40.88	26.5	25.2	3825	3638
350	322	322	1029	1038	673	640	1735	1650
16"	14.69	14.69	44.5	44.88	29.8	28.5	4985	4630
400	373	373	1130	1140	757	725	2261	2100
18"	16.69	16.69	48	48.5	33.9	31.5	6834	5842
450	423	423	1219	1232	862	800	3100	2650
20"	18.56	18.56	52	52.5	38	36.2	9462	8708
500	471	471	1321	1334	965	920	4292	3950
24"	22.44	22.44	61	61.75	45.9	43.3	16579	15432
600	570	570	1549	1568	1165	1100	7520	7000

Weight and dimensions for larger valve sizes up to 36" available on request

Dimensions: Class 900 - Reduced Port

Size	Bore		Face to Face		D in/mm	D1 in/mm	Weight
NPS/DN	B1 in/mm	B2 in/mm	RF in/mm	RTJ in/mm	D in/mm	D1 in/mm	Model GG lb/kg	Model GW lb/kg
2"×11/2"	1.93	1.5	14.5	14.63	8.5	8.5	108	108
50×40	49	38	368	371	216	216	49	49
3"×2"	2.94	1.94	15	15.13	9.5	9.5	150	150
80×50	74	49	381	384	241	241	68	68
4"X3"	3.94	2.94	18	18.13	11.5	11.5	254	254
100×80	100	74	457	460	291	291	115	115
6"×4"	5.94	3.94	24	24.13	15	15	481	481
150×100	150	100	610	613	381	381	218	218
8"×6"	7.94	5.94	29	29.13	18.5	18.5	948	948
200×150	201	150	737	740	471	471	430	430
10"X8"	9.94	7.94	33	33.13	21.5	21.5	1700	1654
250×200	252	201	838	841	546	546	771	750
12"×10"	11.94	9.94	38	38.13	24.1	24.1	2355	2293
300×250	303	252	965	968	611	611	1068	1040
14"×10"	12.69	9.94	40.5	40.88	25.2	25.2	2573	2513
350×250	322	252	1029	1038	641	641	1167	1140
14"×12"	12.69	11.94	40.5	40.88	25.2	25.2	3329	3219
350×300	322	303	1029	1038	641	641	1510	1460
16"×12"	14.69	11.94	44.5	44.88	27.8	27.8	3611	3472
400×300	373	303	1130	1140	706	706	1638	1575
20"X16"	18.56	14.69	52	52.5	33.7	33.7	6614	6283
500×400	471	373	1321	1334	855	855	3000	2850
24"×20"	22.44	18.56	61	61.75	41	41	11422	10472
600×500	570	471	1549	1568	1041	1041	5181	4750