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Metal Bellows Valves

Zero leakage guarantee and environmentally friendly flow control. ORFA Industrial metal bellows valves provide the most reliable solution in the management of hazardous, hot, and valuable fluids, thanks to their stainless steel bellows structure that ensures stem sealing.

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What Are Metal Bellows Valves and Why Are They Important?

Metal bellows valves are devices that, in addition to the gland packing that provides stem sealing in standard valves, feature a flexible metal bellows mechanism surrounding the stem. Thanks to this structure, metal bellows valves completely prevent the fluid from leaking into the atmosphere, ensuring occupational safety and preventing energy loss. ORFA Industrial recommends using metal bellows valves as a long-lasting solution in hot oil installations and saturated steam lines where leakage is hazardous. Professional metal bellows valves, which especially prevent leaks caused by stem wear, are indispensable for environmentally friendly facility management. Metal bellows valves with high operational precision reduce total operating costs by extending the maintenance intervals of your installation.

Types and Technical Structure of Metal Bellows Valves

Different metal bellows valves models should be preferred depending on the temperature and chemical characteristics of the fluid. The main product groups available in ORFA stocks are as follows:

Material and Design Types

  • Cast Steel Metal Bellows Valves — High-pressure steam lines.
  • Ductile Cast Iron Models — Hot water and general installations.
  • Stainless Steel Designs — Corrosive and hygienic processes.
  • Flanged Metal Bellows Valves — Standard industrial connections.

Industrial Applications

  • Hot oil heating systems and thermal oil lines.
  • High-pressure steam distribution headers.
  • Hazardous gas and chemical transfer plants.
  • Vacuum technology and precision flow control processes.

Selecting the Right Metal Bellows Valves

The success of a system depends on selecting metal bellows valves that are fully compatible with the operating temperature and nominal pressure (PN16/PN25/PN40). Wrong body material selection can lead to early metal fatigue on metal bellows valves. With ORFA engineering expertise, we determine the most durable metal bellows valves configuration for your project and guarantee sealing with stainless multi-layer bellows technology. Modern designed metal bellows valves offer great ease of use in manual operation thanks to low torque requirements while maximizing sealing safety. Professional metal bellows valves with high strength maintain their sealing form even under dynamic loads. Investing in quality metal bellows valves is the most fundamental building block of plant safety.

Technical Parameters

  • Pressure Class: Options from PN16 to PN40.
  • Temperature Range: Resistance between -60°C and +450°C.
  • Bellows Material: AISI 316Ti or AISI 321 stainless steel.
  • Connection: Standard flanged connection structure.

Operational Advantages

  • Reduces leakage through the stem gland to zero.
  • Minimizes fire risk in hot oil lines.
  • Long, maintenance-free service life.
  • Fast delivery from large stock and technical service support.

Frequently Asked Questions

Why are metal bellows valves mandatory in hot oil lines?

Hot oil is a fluid that can ignite quickly and harm the environment when in contact with the atmosphere. Metal bellows valves make leakage impossible and prevent fire risk because they provide stem sealing with a metallic barrier (bellows).

What is the difference between a standard globe valve and metal bellows valves?

Standard valves only use soft gland packing for sealing and may leak over time. Metal bellows valves, on the other hand, provide permanent and safe sealing by using a metallic bellows in addition to the packing.

How are the prices of metal bellows valves determined?

Prices for metal bellows valves vary depending on the body material (steel/stainless steel), the DN size of the valve, the pressure class, and the number of bellows layers.