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Bellow Sealed Gate Valves

Price 5000 INR/ Unit

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MOQ : 1 Number

Bellow Sealed Gate Valves Specification

Sealing
Metal / PTFE / Graphite

Size
DN15 to DN300

Voltage
N/A (Manual Operation)

Structure
Bellow Sealed

Connection
Flanged / Butt Weld / Socket Weld

Material
Stainless Steel / Cast Steel / Forged Steel

Type
Bellow Sealed Gate Valve

Power Source
Manual

Pressure
Class 150 to 600

Media
Water, Gas, Oil, Steam

Working Temperature
-29C to 425C

Port Size
1/2 Inch to 12 Inch

Surface
Polished

Shape
Straight

Leakage Category
Class VI

Fire Safe Design
Available on Request

Design Temperature Range
-29°C to 425°C

Bellow Material
SS 316L / Inconel 625

Coating
Epoxy Painted / Shot Blasted

Top Flange for Actuator
ISO 5211

Anti Blow-out Stem
Yes

End Connection Standard
ASME B16.5 / DIN / JIS

Body Test Pressure
1.5 times rated pressure

Face to Face Dimensions
ASME B16.10

Standard
API 600 / DIN 3356 / BS 1873

Bonnet Type
Bolted Bonnet / Welded Bonnet

Handwheel Material
Cast Iron / Ductile Iron

Packing
Graphite / PTFE

Shell Material Grade
A216 WCB / CF8 / CF8M / CF3M

About Bellow Sealed Gate Valves

FlowBiz Exports Pvt Ltd Valves is a High Quality Bellow Sealed Gate Valves Manufacturer in Mumbai, Maharashtra, India. We are a leading manufacturer of Bellow Sealed Gate Valves in Mumbai and nearby areas.

Bellow Sealed Gate Valves are widely used for all types of applications and are suitable for both above ground and underground installation. not least for underground installations it is paramount to choose the right type of Valves to avoid high replacement costs.

Bellow Sealed Gate Valves are designed for fully open or fully closed service. They are installed in pipelines as isolating valves, and should not be used as control or regulating valves. Operation of a Bellow Sealed Gate Valves is performed doing an either clockwise to close (CTC) or clockwise to open (CTO) rotating motion of the stem. When operating the Valves stem, the Gate moves up- or downwards on the threaded part of the stem.

Features:

Light weight for easier & quick installation.

Manufactured from high performance rigid optimum quality compound.

Precision in flow control.

Low frictional losses.

Great chemical & corrosion resistance.

Product Details:

Valve Size - 1/2 Inch 20 Inches

Application - Industrial

Media - Air, Water, Gas, Fuel, Powder/Solids

Temperature of Media - High Temperature, Low Temperature, Medium Temperature, Normal Temperature

Engineered for Demanding Applications

These bellow sealed gate valves are designed for high-integrity sealing, making them suitable for media such as water, gas, oil, and steam. With robust construction options and compliance with multiple international standards, they can withstand aggressive environments and temperatures ranging from -29C to 425C. The inclusion of anti blow-out stems and the option for fire-safe design ensures reliable operation and safety even in critical situations.

Precision Manufacturing and Versatile Connections

Manufactured with shell material grades such as A216 WCB, CF8, CF8M, and CF3M, these valves undergo stringent body testing at 1.5 times the rated pressure. They feature polished surfaces and are available with straight shapes, epoxy painted or shot-blasted coatings. Connection versatility includes flanged, butt weld, and socket weld ends, adhering to ASME B16.5, DIN, and JIS standards. Port sizes range from 1/2 inch up to 12 inches, accommodating a wide range of applications.

Easy Maintenance and Long-Term Reliability

Thanks to their bellow sealed structure, these gate valves drastically reduce fugitive emissions and require minimal maintenance. The bolted or welded bonnet, ISO 5211 actuator top flange, and manual handwheel operation provide flexibility in installation and operation. Sealing options include metal, PTFE, or graphite, while packing materials are selected for durability and chemical resistance, ensuring stable performance over prolonged use.

FAQ's of Bellow Sealed Gate Valves:

Q: How do bellow sealed gate valves prevent leakage better than conventional valves?

A: Bellow sealed gate valves utilize a flexible metal bellow (made from SS 316L or Inconel 625) that hermetically isolates the stem from the process media, eliminating stem leakage, which is a common issue in conventional packed gate valves. This design significantly reduces fugitive emissions and is ideal for applications demanding high integrity.

Q: What standards and approvals do these gate valves adhere to?

A: These gate valves comply with leading international standards, including API 600, DIN 3356, and BS 1873 for design, and ASME B16.10 for face-to-face dimensions. End connections meet ASME B16.5, DIN, and JIS standards, ensuring compatibility with global piping requirements.

Q: When is it recommended to use a bellow sealed gate valve over other types?

A: Bellow sealed gate valves are recommended when zero stem leakage is critical, such as in handling toxic, volatile, or hazardous fluids, or where environmental regulations require minimum emissions. They are also ideal for high-temperature or vacuum services due to their robust sealing capabilities.

Q: Where can these valves be installed, and for what types of media are they suitable?

A: These valves can be installed in industrial facilities, refineries, power plants, chemical plants, and water or steam distribution networks. They are suitable for water, gas, oil, and steam, performing reliably across a wide temperature range (-29C to 425C) and pressure classes up to 600.

Q: What are the benefits of the anti blow-out stem and fire-safe design?

A: The anti blow-out stem ensures the stem remains securely in place, even under pressure surges or unforeseen incidents, enhancing operator safety. The fire-safe design, available upon request, enables continued sealing and operation during fire exposure, protecting plant integrity and personnel.

Q: How are these valves operated and maintained?

A: Operation is manual using a robust cast iron or ductile iron handwheel, with an ISO 5211 actuator flange for automation if needed. The bellow sealed design reduces maintenance since there's no need to adjust packing to control leakage, resulting in lower long-term operating costs.

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