Bellows Globe Valve

Product Overview

Bellows Seal Globe Valve with bellow seal acc.to is applicable to the cutting and connection of pipelines medium that are used in various industries such as petroleum, chemical industry, pharmacy, chemical fertilizer, electric power industry etc under nominal pressure of PN1.6~~16MPa and working temperature of -29~~350℃.

Product Features

This product has logical structure, reliable seal, excellent performance and nice design.
The seal surface is build-up welding with Co hard alloy, which is attrition-resistant, corrosion-resistant, has good friction resistant and long life.
The stem is quenched and tempered, and its surface is treated by nitriding treatment, thus it has good corrosion resistant and friction resistant.
It has double seal capability, thus is more reliable.
The stem may show the position of lift, thus it is clearer.
The part material, flange and but weld end dimension may be selected according to current operating condition and users' requirement, so that meet the requirements of various engineering.

Technical Specifications

Structural Formation	BB-BG-OS & Y
Driving Manner	Hand-operated / Electric-actuated
Design Standard	GB 12235
Face to Face	GB 12221
Flange Ends	GB 9113 / JB/T 79 / HG 20596
Test & Inspection	JB/T 9092 / GB/T 13927

Main Dimension and Weight

No.	Part Name	Material
1	Body	WCB, CF8, CF8M, CF3, CF3M
2	Disc	25, 1Cr13, 2Cr13, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 20Cr1Mo1V, 25Cr2MoV
3	Pin	25, 1Cr13, 2Cr13, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 20Cr1Mo1V, 25Cr2MoV
4	Stem	25, 1Cr13, 2Cr13, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 20Cr1Mo1V, 25Cr2MoV
5	Bellow Assembly	1Cr18Ni9Ti, 304, 316, 304L, 316L
6	Gasket	Flexible Graphite + Stainless Steel, PTFE
7	Bonnet	WCB, CF8, CF8M, CF3, CF3M
8	Bolt	0Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 35CrMoV, 25Cr2MoV
9	Nut	0Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 35CrMoV, 25Cr2MoV
10	Packing	Flexible Graphite, PTFE
11	Gland	WCB, CF8, CF8M, CF3, CF3M
12	Yoke Nut	Copper Alloy ZQA19-4
13	Handwheel	WCB, QT400-18

bellows Globe Valve

Main Dimension

WJ41H-16 Series

Type	DN	L	D	D1	D2	b	N-Φd	H	D0
WJ41H-16C / WJ41W-16P / WJ41Y-16I	15	130	95	95	45	14	4-Φ14	190	120
	20	150	105	75	55	14	4-Φ14	195	140
	25	160	115	85	65	14	4-Φ14	225	140
	32	180	135	100	78	16	4-Φ18	260	180
	40	200	145	110	85	16	4-Φ18	280	200
	50	230	160	125	100	16	4-Φ18	310	220
	65	290	180	145	120	18	4-Φ18	340	260
	80	310	195	160	135	20	8-Φ18	395	280
	100	350	215	180	155	20	8-Φ18	435	300
	125	400	245	210	185	22	8-Φ18	470	340
	150	480	280	240	210	24	8-Φ23	535	400
	200	600	335	295	265	26	12-Φ23	590	450
	250	730	405	355	320	30	12-Φ25	630	450
	300	850	460	410	375	30	12-Φ25	680	500
	350	980	520	470	435	34	16-Φ25	720	500
	400	950	580	525	485	36	16-Φ30	1235	800
	450	1200	640	585	545	40	20-Φ30	—	1000
	500	1250	705	650	608	44	20-Φ34	—	1000
	600	1450	840	770	718	48	20-Φ36/41	—	1000
	700	1650	910	840	788	50	20-Φ36/41	—	1000

WJ41H-25 Series

Type	DN	L	D	D1	D2	b	N-Φd	H	D0
WJ41H-25C / WJ41W-25P / WJ41Y-25I	15	130	95	65	45	16	4-Φ14	190	120
	20	150	105	75	55	16	4-Φ14	195	140
	25	160	115	85	65	16	4-Φ14	225	140
	32	180	135	100	78	18	4-Φ18	260	180
	40	200	145	110	85	18	4-Φ18	280	200
	50	230	160	125	100	20	4-Φ18	310	220
	65	290	180	145	120	22	8-Φ18	340	260
	80	310	195	160	135	22	8-Φ18	395	280
	100	350	230	190	160	24	8-Φ23	435	300
	125	400	270	220	188	28	8-Φ25	470	340
	150	480	300	250	218	30	8-Φ25	535	400
	200	600	360	310	278	34	12-Φ25	590	450
	250	730	425	370	332	36	12-Φ30	630	450
	300	850	485	430	390	40	16-Φ30	680	500
	350	980	550	490	448	44	16-Φ34	720	500
	400	950	610	550	505	48	16-Φ34	1235	800
	450	1200	660	600	555	50	20-Φ34	—	1000
	500	1250	730	660	610	52	20-Φ41	—	1000
	600	1450	840	770	718	56	20-Φ41	—	—

WJ41H-40 Series

Type	DN	L	D	D1	D2	b	N-Φd	H	D0
WJ41H-40C / WJ41W-40P / WJ41Y-40I	15	130	95	65	45	16	4-Φ14	190	120
	20	150	105	75	55	16	4-Φ14	195	140
	25	160	115	85	65	16	4-Φ14	225	140
	32	180	135	100	78	18	4-Φ18	260	180
	40	200	145	110	85	18	4-Φ18	280	200
	50	230	160	125	100	20	4-Φ18	310	220
	65	290	180	145	120	22	8-Φ18	340	260
	80	310	195	160	135	22	8-Φ18	395	280
	100	350	230	190	160	24	8-Φ23	435	300
	125	400	270	220	188	28	8-Φ25	470	340
	150	480	300	250	218	30	8-Φ25	535	400
	200	600	375	320	282	38	12-Φ30	590	450
	250	730	445	385	345	42	12-Φ34	630	450
	300	850	510	450	408	46	16-Φ34	680	500
	350	980	570	510	465	52	16-Φ34	720	500
	400	1100	655	585	535	58	16-Φ41	1100	600
	500	1250	755	670	612	62	20-Φ48	1250	700
	600	1450	890	795	730	62	20-Φ54/48	1380	900

Manufacturing Process

Step 1: Order and Design

Based on the customer’s requirements for pressure rating, nominal diameter, material, connection type, and operating conditions, the structural design and technical specifications of the bellows globe valve are determined. Subsequently, drawing design, material confirmation, and production process review are completed to prepare for subsequent manufacturing.

Bellows Globe Valve

Step 2: Forging & Casting

Major pressure-bearing components such as the valve body and bonnet are typically formed using forging or casting processes. For bellows globe valves, the chemical composition, dimensional accuracy, and internal density of the blanks must be strictly controlled, and necessary heat treatment must be performed to ensure strength and sealing reliability.

Bellows Globe Valve

Step 3: Machining

Precision machining is performed on the valve body, bonnet, stem, sealing surfaces, and connection ends, including turning, boring, drilling, tapping, and sealing surface finishing. Key machining focuses for bellows globe valves include stem fit accuracy, dimensional tolerances at the bellows connection points, and the surface finish of the seat sealing surfaces.

Bellows Globe Valve

Step 4: Assembly

Assemble components such as the bellows assembly, valve stem, disc, bonnet, packing, and handwheel according to process requirements. During assembly, special attention must be paid to protecting the welded areas of the bellows, ensuring the concentricity of the valve stem, and verifying the smoothness of opening and closing operations to guarantee stable overall sealing performance.

Bellows Globe Valve

Step 5: Testing & Quality Assurance

After assembly, the bellows globe valve undergoes body strength testing, seal testing, air tightness testing, and operational performance checks. Concurrently, in accordance with quality control procedures, inspections are conducted on critical dimensions, appearance, and material traceability to ensure the product complies with relevant standards and customer requirements.

Bellows Globe Valve

Step 6: Painting and Finishing

After passing inspection, the valve surface is cleaned, treated with rust prevention, and spray-painted. Nameplates, markings, and packaging are then applied. Finally, the finished product is protected and stored in the warehouse to ensure the valve remains in good condition during transportation and delivery.

Bellows Globe Valve

Applications

It is primarily used in piping systems for steam, gas, and liquid media in industries such as petroleum, chemicals, pharmaceuticals, and power generation.

These valves are widely used in:

Oil and Gas

Chemical Processing

Power Plants

Water Treatment

Metallurgy and Mining

Agriculture and Irrigation

Factory Environment

Factory Production Line

Material Storage

Quality Control

Assembly Workshop

Quality Control

Assembly Workshop

Why Choose Us

Superior Quality

Our valves are manufactured using premium materials and undergo rigorous quality testing to ensure reliable performance in demanding industrial applications.

Advanced Technology

Equipped with state-of-the-art CNC machining centers and precision manufacturing equipment, we deliver valves with exceptional accuracy and consistency.

Competitive Pricing

Through optimized manufacturing processes and bulk material procurement, we offer high-quality valves at competitive prices without compromising on quality.

Expert Support

Our experienced technical team provides comprehensive support from product selection to after-sales service, ensuring optimal valve performance for your specific application.

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