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Stainless Bellows Globe Valve for Steam Boiler Systems

Design Standard: BS1873 / ASME B16.34,
End Flange: ASME B16.5 / JIS B2212 / DIN 2543
Face to Face: ASME B16.10 / JISB2002 / BS EN558-1
Inspection and testing: API598

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Bellows globe valve Leak-Proof Bellows Globe Valve

Product Overview

Product Description

Our Bellows Globe Valve is an advanced industrial flow control valve designed for precise medium cutoff and connection, with industry-leading bellows sealing technology at its core. Built to BS1873 and ASME B16.34 design standards, and tested to API 598 inspection specifications, this double seal bellows globe valve completely eliminates the common drawbacks of traditional valve stem packing seals, including rapid aging and persistent external leakage. Available in sizes from 1/2” to 12”, with pressure ratings of 150LB to 300LB and a maximum operating temperature of 425℃, it is compatible with water, oil, gas, and steam, as well as highly permeable and hazardous mediums. Constructed with robust carbon steel and stainless steel materials, it is the preferred flow control solution for chemical processing plants, pharmaceutical manufacturers, power generation facilities, and oil and gas operators requiring uncompromising safety and reliability.

Key Features & Industry-Leading Benefits

Dual-Seal Zero-External-Leakage Design

This industrial bellows globe valve features an innovative dual-seal structure combining a stainless steel bellows seal and a flexible graphite packing seal. Even in the unlikely event of bellows failure, the secondary packing seal provides reliable backup protection, guaranteeing zero stem leakage and full compliance with strict global industrial sealing standards. The closed, stretchable bellows assembly completely eliminates external leakage caused by packing wear, making it ideal for systems transporting highly permeable or hazardous mediums.

High-Temperature & High-Pressure Adaptability

Engineered for extreme working conditions, our high temperature bellows globe valve features a unique self-sealing design, where sealing reliability improves as system pressure increases. The bellows structure also absorbs pipeline thermal expansion and mechanical vibration, preventing seal damage from thermal stress and ensuring stable performance in high-temperature, high-pressure industrial environments.

Extended Service Life & Reduced Maintenance

The valve’s bellows seal is manufactured from corrosion-resistant stainless steel, delivering exceptional durability and resistance to chemical degradation, far outlasting traditional packing seals. Its streamlined, easy-to-disassemble structure simplifies routine maintenance, reducing maintenance frequency and associated labor costs, while minimizing unplanned production downtime for your facility.

Technical Parameters

Design Standard: BS1873 / ASME B16.34,
End Flange: ASME B16.5 / JIS B2212 / DIN 2543
Face to Face: ASME B16.10 / JISB2002 / BS EN558-1
Inspection and testing: API598

Size

Pressure

Temperature

Suitable Medium

Features

1/2”~12”

150LB~300LB

425℃

Water,Oil,Gas,Steam

Double Bellows

Bellows Sealed Stem

Position Indication

Convenient Maintance

Double Sealed

Non-rising Handwheel

Product Specifications

17	Nut cover	C.S	C.S	C.S	C.S	C.S
16	Handlewheel	WCB	WCB	WCB	WCB	WCB
15	Stem Nut	QAL9-4	QAL9-4	QAL9-4	QAL9-4	QAL9-4
14	Stem	182 F6a	182 F6a	182 F6a	182 F6a	182 F6a
13	Guide plate	C.S	C.S	C.S	316	C.S
12	Pin	304	316	304L	316	410
11	Packing Gland	CF8	CF8M	CF3	CF3M	410
10	Packing	Flexible graphite	Flexible graphite	Flexible graphite	Flexible graphite	Flexible graphite
9	Bonnet	CF8	CF8M	CF3	CF3M	WCB
8	Nut	8	8M	8	8M	2H
7	Bolt	B8	B8M	B8	B8M	B7
6	Bellows cover	304	316	304L	316	304
5	Gasket	Flexible graphite	Flexible graphite	Flexible graphite	Flexible graphite	Flexible graphite
4	corrugated tube	304	316	304L	316	304
3	Disc Cover	304	316	304L	316	A105
2	Disc	CF8	CF8M	CF3	CF3M	WCB
1	Body	CF8	CF8M	CF3	CF3M	WCB
NO.	Part Name	Material

ASME 150LB
NPS	L	D	D1	D2	b	f	n-∅Z
1/2"	108	90	61	35	8	2	4-16
3/4"	117	100	70	43	9	2	4-16
1"	127	110	80	51	10	2	4-16
1-1/4"	140	115	89	64	11	2	4-16
1-1/2"	165	125	99	73	13	2	4-16
2"	203	150	121	92	14	2	4-19
2-1/2"	216	180	140	105	16	2	4-19
3"	241	190	153	127	18	2	4-19
4"	292	230	191	157	22	2	8-19
5"	356	255	216	186	22	2	8-22
6"	406	280	242	216	24	2	8-22
8"	495	345	299	270	27	2	8-22
10"	622	405	362	324	29	2	12-25
12"	698	485	432	381	30	2	12-25

DIN PN16
DN	L	D	D1	D2	b	f	n-∅Z
15	130	95	65	45	14	2	4-14
20	150	105	75	55	14	2	4-14
25	160	115	85	65	14	2	4-14
32	180	135	100	78	16	2	4-18
40	200	145	110	85	16	3	4-18
50	230	160	125	100	16	3	4-18
65	290	180	145	120	18	3	4-18
80	310	195	160	135	20	3	8-18
100	350	215	180	155	20	3	8-18
125	400	250	210	185	22	3	8-18
150	480	285	240	210	22	3	8-22
200	600	340	295	265	24	3	12-22
250	730	405	355	320	26	3	12-26
300	850	460	460	375	28	3	12-26

ASME 300LB
NPS	L	D	D1	D2	b	f	n-∅Z
1/2"	152	95	67	35	13	2	4-16
3/4"	178	115	83	43	14	2	4-19
1"	203	125	89	51	16	2	4-19
1-1/4"	216	135	98	64	18	2	4-19
1-1/2"	229	155	114	73	19	2	4-22
2"	267	165	127	92	21	2	8-19
2-1/2"	292	190	149	105	24	2	8-22
3"	318	210	168	127	27	2	8-22
4"	356	255	200	157	30	2	8-22
5"	400	280	235	185	33	2	8-22
6"	444	320	270	216	35	2	12-22
8"	559	380	330	270	40	2	12-25
10"	622	445	387	324	46	2	16-29
12"	711	520	451	381	49	2	16-32

JIS10K
JIS	L	D	D1	D2	b	f	n-∅Z
15A	108	95	70	51	12	1	4-15
20A	117	100	75	56	14	1	4-15
25A	127	125	90	67	14	1	4-19
32A	140	135	100	76	16	2	4-19
40A	165	140	105	81	16	2	4-19
50A	203	155	120	96	16	2	4-19
65A	216	175	140	116	18	2	4-19
80A	241	185	150	126	18	2	8-19
100A	292	210	175	151	18	2	8-19
125A	356	250	210	182	20	2	8-23
150A	406	280	240	212	22	2	8-23
200A	495	330	290	262	22	2	12-23
250A	622	400	355	324	24	2	12-25
300A	698	445	400	368	24	3	16-25

Product Uses

Industrial Applications

Our API 598 tested bellows globe valve is widely used across industries with strict leakage control and safety requirements. In the petrochemical and chemical processing sectors, it is used to control the flow of corrosive, flammable, and explosive mediums, preventing hazardous leaks that threaten personnel safety and environmental compliance. It is a critical component in pharmaceutical and fertilizer production facilities, where it maintains sterile, contamination-free processing environments. It also plays a vital role in power generation, food and beverage manufacturing, and industrial steam systems, delivering reliable cutoff and flow control for critical process pipelines.

Product Operate Guide

Bellows globe valve

1) Design Standard: BS1873,ASME B16.34,API 602,DIN3356,GB9113

2) End Flange: ASME B16.5.JIS B2212.DIN 2543,GB9113

3) Size: 1/2"-12"

4) Pressure: 150lb~300lb

5) Temperature: 425℃

6) Materials: Carbon steel,Stainless steel

7) Suitable Medium: Water,Oil,Gas,Steam

FAQ

FAQ About Bellows Globe Valve

How reliable is the sealing performance of this bellows globe valve?

This valve uses a heavy-duty stainless steel bellows as the primary sealing component, paired with a secondary packing seal for dual protection. This design delivers exceptional sealing reliability, eliminating external stem leakage and ensuring safe, stable pipeline operation even in harsh working conditions.

What is the expected service life of this industrial bellows globe valve?

The valve’s bellows seal is made from corrosion-resistant, high-strength stainless steel, with excellent resistance to thermal fatigue and chemical wear. Its simple, maintainable structure further extends service life, with many installations delivering reliable performance for years with minimal routine maintenance.

What design and testing standards does this bellows globe valve meet?

Our valve is manufactured in full compliance with BS1873, ASME B16.34, and DIN 3356 design standards, with all units inspected and tested per API 598 protocols to ensure consistent quality and performance.