Bellow Seal Gate Valve

Trusted Bellow Seal Gate Valve Manufacturer

NTVAL provides durable Bellow Seal Gate Valves with leak-proof design, ideal for high-temperature and high-pressure settings. Featuring advanced sealing technology, our valves ensure reliable performance, safety, and efficiency for large-scale projects.

Reliable Bellow Seal Gate Valve

Quality Control

Technicians check that the metals used in the bellow seal gate valve match the required specifications, avoiding problems from incorrect materials.

PMI Test

The sealing test verifies if the bellow seal gate valve tightly closes, blocking leaks and maintaining safe and effective system operation.

Sealing Test

Technicians conduct the low emission test to verify that the valve stops harmful gas leaks, protecting the environment and workers from risks.

Low Emission Test

The impact test evaluates whether the valve can handle sudden force or pressure changes, confirming its strength in extreme operating conditions.

Impact Test

During dimension inspection, the valve’s size and shape are measured to confirm it fits correctly within the system for effective function.

Dimension Inspection

Technicians conduct the painting thickness test to measure the coating on the valve, confirming it guards against rust and environmental damage.

Painting Thickness Test

The PT, or Penetrant Test, identifies tiny surface flaws or cracks in the valve, helping to avoid leaks or failures during operation.

PT

Material inspection assesses the quality of metals and other materials used in the valve to confirm that high-quality components are selected.

Material Inspection

Our Valve Applications in Key Industries

Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.

The bellow seal gate valve prevents leaks, making it perfect for safely handling dangerous chemicals in processing plants.

Chemical Processing

In the petrol chemical industry, the valve stops leaks of harmful substances, keeping both workers and the environment safe from danger.

Petrol Chemical

Bellow seal gate valves provide safety and stability in high-pressure systems, making them reliable choices for the O.P.G and nuclear industries.

O.P.G & Nuclear

The bellow seal gate valve withstands tough conditions in the pulp industry, preventing fluid leaks and supporting smooth production processes.

Pulp

Mining operations require durable valves, and the bellow seal gate valve resists wear and tear, delivering long-lasting performance in challenging environments.

Mining

In the water and sewage industry, the bellow seal gate valve blocks contamination, keeping systems secure and maintaining safe water supplies.

Water & Sewage

Steam systems use bellow seal gate valves to manage high temperatures and prevent steam leaks, promoting safe and efficient operations.

Steam System

The bellow seal gate valve effectively handles high heat and pressure in boiling systems, preventing leaks and supporting smooth operations.

Boiling System

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Cast Steel Gate Valve, Straight Through Design

The EN/DIN Bellow Gate Valve is made from durable cast steel, providing strength and longevity. Its straight-through design allows for smooth and unobstructed flow of fluids, minimizing pressure drops. This design is particularly effective for maintaining consistent flow in pipeline systems.

Outside Screw and Yoke with Rising Stem

This valve features an outside screw and yoke with a rising stem, which provides a visual indication of the valve’s open or closed position. The rising stem design helps operators easily monitor and control the valve. Additionally, the external screw and yoke design simplifies maintenance and keeps the moving parts visible.

Double Bellow Sealed for Enhanced Protection

The valve is equipped with a double bellow seal, which provides extra protection against leaks. This feature is crucial in preventing fluid leakage and contamination, especially in critical applications. The double bellow design also extends the valve’s service life by reducing wear on the sealing surfaces.

Compliance with Industry Standards

The EN/DIN Bellow Gate Valve is designed to meet DIN3352, ASME B16.10, and BS1973 standards, ensuring high quality and performance. Compliance with these standards means the valve is built to withstand rigorous operational demands. This makes the valve a reliable choice for various industrial applications

PN10/16 Dimensions

Class 150~600 Lb Bellow Gate Valve

Materials

Class 150~600 Lb Dimensions

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Additional General Insights Here

Specs of Bellow Seal Gate Valve

Body Material and Construction

This valve is constructed using high-quality stainless steel. This material provides durability and resistance to corrosion, making it suitable for various industrial applications. Stainless steel also provides excellent strength, allowing the valve to perform reliably under high-pressure conditions. For example, in the petrochemical industry, these valves are used to handle highly corrosive substances without compromising performance.

Pressure and Temperature Ratings

This valve is designed to withstand high pressures and temperatures, ensuring reliable performance in demanding environments. Typically, these valves can operate effectively at pressures up to 1500 PSI and temperatures ranging from -20°C to 400°C. Personally, this wide range makes them versatile for use in various industries, including oil and gas, chemical processing, and power generation. Their durability and adaptability reduce maintenance needs and ensure operational efficiency in critical applications.

Flow Characteristics

This valve is designed to provide excellent flow characteristics, ensuring smooth and reliable operation. It features a streamlined body, like those offered by NTVAL, that minimizes flow resistance, providing efficient fluid control. This design reduces pressure drops and improves the valve’s ability to handle high flow rates, making it suitable for demanding applications. Additionally, its optimized flow path enhances energy efficiency, contributing to cost savings in long-term operations.

Features of Bellow Seal Gate Valve

High-Temperature Resistance

Bellow Seal Gate Valves are designed to handle extremely high temperatures, making them suitable for demanding industrial applications. These valves operate efficiently in environments with significant heat without degrading. Their construction provides stability and functionality, even under the most intense conditions, amazing right?

Non-Rotating Stem

A key feature of the Bellow Seal Gate Valve is its non-rotating stem. For instance, this design prevents the bellows from twisting, which can cause damage over time. By keeping the bellows stable, the valve allows consistent performance and longevity, making it a valuable choice for critical applications.

Dual Stem Seals

These valves offer enhanced safety and durability with their two secondary stem seals: a backseat in the open position and graphite packing. The dual seals provide an extra layer of protection against leaks, keeping the valve secure even under high pressure. This feature is especially important in environments where preventing leaks is crucial for safety and efficiency.

Benefits of Bellow Seal Gate Valve

Long Cycle Life

Bellow Seal Gate Valves are known for their long cycle life, capable of handling up to 3,000 cycles. This means they can be used many times without breaking or wearing out, making them very reliable for industries that need valves to last a long time. The extended cycle life helps reduce maintenance costs and downtime, contributing to smooth operations.

Zero Leakage

A standout benefit of Bellow Seal Gate Valves is their leak-proof construction. The bellow mechanism creates a tight seal, preventing any fluid from escaping. This design is essential for industries where maintaining a clean and uncontaminated environment is crucial, promoting operational safety and reliability.

Corrosion Resistant

These valves are designed with materials that resist corrosion, extending their lifespan and maintaining performance. NTVAL crafts each valve to withstand harsh chemicals and corrosive environments. The corrosion-resistant properties of these valves mean they remain functional and safe over long periods, reducing the need for frequent replacements and maintenance.

Applications of Bellow Seal Gate Valve

Chemical Processing Plants

In chemical processing plants, these valves are essential for handling aggressive and corrosive substances. NTVAL’s valves are particularly effective due to their corrosion-resistant properties and tight sealing capabilities, preventing leaks and contamination. In my experience, this makes them ideal for processes where maintaining purity and preventing chemical exposure are critical.

Biotechnology

In the biotechnology sector, these valves are used for handling sensitive and sterile fluids. Their leak-proof design prevents contamination, which is essential for maintaining purity in biotechnological processes. The valves’ corrosion-resistant properties also make them suitable for handling various chemicals used in this field.

Pharmaceutical Industry

The pharmaceutical industry benefits from these valves due to their hygienic and leak-proof design. These valves are used in applications where cleanliness and contamination prevention are paramount. The superior sealing capability of these valves helps maintain sterile conditions, which is crucial in pharmaceutical manufacturing and processing.

Steam and Boiling Systems

Bellow Seal Gate Valves are perfect for steam and boiling systems, handling high temperatures and pressures with ease. They offer precise control of steam and hot liquids, helping keep boilers and steam-powered equipment running smoothly. Their durable construction minimizes the risk of leaks, making them a reliable choice in these environments.

4 Considerations When Buying Bellow Seal Gate Valve

01 Fluid Compatibility

When choosing a Bellow Seal Gate Valve, considering fluid compatibility is essential. The materials used in the valve must be suitable for the specific chemicals and temperatures of the fluid it will control. My tip is to select the right valve material to help prevent corrosion and damage, which can lead to a longer lifespan and better performance.

02 Operating Conditions

Determine the type of actuation needed for your 3 Way Plug Valve, whether manual, pneumatic, or electric. Electric actuators might cost more upfront but offer precise control, which is essential for complex systems. The wrong actuation method can lead to inefficiencies in your process.

03 Flow Rate

The flow rate is another important factor when purchasing this valve. It is necessary to choose a valve that can handle the desired flow rate to maintain proper operation and avoid bottlenecks. A valve that matches the system’s flow requirements will contribute to overall efficiency and performance.

04 End Connections

Consider the end connections of the valve to verify compatibility with the existing piping system. Valves can have various types of end connections, such as flanged, threaded, or welded. Choosing the right connection type is important for a secure and leak-free installation. NTVAL offers a range of end connections to suit different installation needs, making it easier to integrate their valves into any system.

FAQs of Bellow Seal Gate Valve

1. What after-sales support does NTVAL offer for valves with quality issues?

NTVAL provides comprehensive after-sales support, including technical assistance and troubleshooting for any issues. Clients can benefit from repairs or replacements, providing reliable service and satisfaction.

2. What certifications do Bellow Seal Gate Valves hold?

Bellow Seal Gate Valves are certified with ISO9001, ISO14001, ISO45001, API6D, and API607. These certifications demonstrate a commitment to quality, environmental responsibility, and safety standards.

3. Are Bellow Seal Gate Valves environmentally friendly?

Yes, our Bellow Seal Gate Valves are designed with sustainability in mind. They help reduce emissions and leakage, contributing to a cleaner and safer environment.

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SIZE (DN)	40	50	65	80	100	125	150	200	250	300	350	400	500	600 Unit mm
L	140	150	170	180	190	200	210	230	250	270	–	–	–	–
H(closed)	400	458	530	615	748	887	1014	1294	1595	1880	–	–	–	–
Stroke	50	60	75	90	110	138	162	212	265	318	368	424	525	628
W.T(kg)	17.2	21	24.5	32.5	39	54.5	70.5	105	147.5	201	–	–	–	–
KV	59	90	149	236	360	567	815	1400	2300	3249	4420	5770	9015	12980

Face to Face	EN 558-1/DIN 3202 F4/F5
End Flange	EN 1092
Butt Weld	EN 12627
Class	PN10,PN16

SIZE (DN)	40	50	65	80	100	125	150	200	250	300	350	400	500	600 Unit mm
L	240	250	270	280	300	325	350	400	450	500	550	600	600	800
H(closed)	430	478	575	647	733	897	974	1214	1455	1650	1930	2187	2695	3110
Stroke	50	60	75	90	110	138	162	212	265	318	368	424	525	628
W.T(kg)	23	25.5	35	33.5	59	76.5	93.5	164.5	223	304.5	382	522	775	1250
KV	59	90	149	236	360	567	815	1400	2300	3249	4420	5770	9015	12980

SIZE (DN)	40	50	65	80	100	125	150	200	250	300	350	400	500	600 Unit mm
L	240	250	270	280	300	325	350	400	450	500	550	600	600	800
H(closed)	430	478	575	647	733	897	974	1214	1455	1650	1930	2187	2695	3110
Stroke	50	60	75	90	110	138	162	212	265	318	368	424	525	628
W.T(kg)	23	25.5	35	33.5	59	76.5	93.5	164.5	223	304.5	–	–	–	–
KV	59	90	149	236	360	567	815	1400	2300	3249	4420	5770	9015	12980

NO.	Part name	Materials
NO.	Part name	A216 WCB	A352 LCB	A217 WC9	A217 C5	A351 CF8M	A351 CF3M
15	Yoke	A216 WCB	A352 LCB	A216 WCB	A216 WCB	A351 CF8
14	Gland flange	A216 WCB				A351 CF8
13	Eye nut	A193 B7	A193 L7	A193 B16		A193 B8M
12	Eye bolt	A1942H	A1944	A1947		A1948M
11	Gland	A276410	A276410	A276304		A276316
10	Gland packing	Flexible graphite+304				PTFE
9	Bonnet	A216 WCB	A352 LCB	A217 WC9	A217 C5	A351 CF8M	A351 CF3M
8	Bonnet bolt	A193 B7	A193 L7	A193 B16	A193 B16	A193 B8M
7	Bonnet nut	A1942H	A1944	A1947	A1947	A1948M
6	Gasket	SS304+graphite				SS316+PTFE
5	Bellows	SS304	SS304	SS304		SS316	SS316L
4	Stem	A182 F6	A182 F304	A182 F304		A182 F316	A182 F316L
3	Wedge	A216 WCB	A352 LCB	A217 WC9	A217 C5	A351 CF8M	A351 CF3M
2	Seat ring	A105		A182 F304		A182 F316	A182 F316L
1	Body	A216 WCB	A352 LCB	A217 WC9	A217 C5	A351 CF8M	A351 CF3M

Class	Dimensions
150LB	Size		inch	2	2-1/2	3	4	6	8	10	12	14	16	18	20	24	26	28	30	32	34	36
	L-RF		mm	178	191	203	229	267	292	330	356	381	406	432	457	508	559	610	610	710	762	71
	L1-BW		mm	216	241	283	305	403	419	457	502	572	610	660	711	813	864	914	914	965	1016	1016
	L2-RTJ		mm	191	203	216	241	279	305	343	368	394	419	445	470	521	559	610	610	710	762	711
	H		mm	520	620	670	785	1095	1415	1730	2065	2466	2900	3110	3510	4200	4500	4800	5300	5600	6100	7200
	K		mm	200	200	250	600	350	350	400	450	500	500	600	750	750	915	915	915	1000	1000	1000
	Wt	RF	kg	215	34	36	60	102	154	264	372	540	660	840	972	1356	2015	2675	3330	3430	3660	4400
		BW	kg	18	26	31	48	92	148	240	348	520	610	680	1056	1330	2100	2640	3180	3540	3900	4220
		RTJ	kg	24	35	45	67	100	165	252	370	540	678	880	1120	1350	2040	2600	3360	3480	3680	4500
300LB	Size		inch	2	2-1/2	3	4	6	8	10	12	14	16	18	20	24	26	28	30	32	34	36
	L-BF		mm	216	241	283	305	403	419	457	502	762	838	914	991	1143	1245	1346	1397	1524	1626	1727
	L1-BW		mm	216	241	283	305	403	419	457	502	762	838	914	991	1143	1245	1346	1397	1524	1626	1727
	L2-RTJ		mm	232	257	298	321	419	435	473	518	778	854	930	1010	1165	1270	1372	1422	1553	1654	1756
	H		mm	624	745	804	942	1314	1698	2076	2478	2960	3480	3732	4210	5040	5400	5700	6360	6720	7320	8600
	K		mm	200	200	250	300	350	350	400	450	500	500	600	750	750	915	915	915	1000	1000	1000
	Wt	RF	kg	29	53	57	87	174	271	420	695	860	1260	1480	1980	2780	3430	3920	5080	5480	5820	6300
		RTJ	kg	29	53	57	87	174	271	420	695	860	1260	1480	1980	2780	3430	3920	5080	5480	5820	6300
		BW	kg	24	42	45	65	132	210	342	600	738	1128	1300	1800	2520	3090	3960	4800	5220	5410	5825
600LB	Size		inch	2	2-1/2	3	4	6	8~nt	10	12	14	16	18	20	24	26	28	30	32	34	36
	L-RF		mm	292	330	356	432	559	660	787	838	889	991	1092	1194	1397	1448	1549	1651	1778	1930	2083
	L1-BW		mm	292	330	356	432	559	660	787	838	889	991	1092	1194	1397	1448	1549	1651	1778	1930	2083
	L2-RTJ		mm	295	333	359	435	562	664	791	841	892	994	1095	1200	1407	1461	1562	1664	1794	1946	2099
	H		mm	748	890	965	1130	1575	2040	2491	2800	3552	4176	4460	5051	6050	6480	6840	7600	8060	8780	10320
	K		mm	200	250	300	350	450	500	600	750	850	850	960	960	1000	1000	1000	1250	500	1650	1800
	Wt	RF	kg	42	66	86	152	438	533	840	1130	1570	1932	2485	2890	4580	5260	5890	6300	8200	8900	10560
		RTJ	kg	42	66	86	152	438	533	840	1130	1570	1932	2485	2890	4580	5260	5890	6300	8200	8900	10560
		BW	kg	38	56	77	124	261	445	685	990	1214	1510	2130	2410	3840	4700	5140	5850	6740	7400	940