Flange shut-off valve with bellows seal. Shut-off valves with bellows seal. What is special about v229 locking devices?

Application: for steam, hot and cold water in heat and water supply systems.

Connection: flanges according to DIN.

Main technical characteristics

Specification of materials

Overall dimensions, mm)

Cast iron, GG25

Installation: arbitrary, flow direction must coincide with the arrow on the body. On valves DN 200 and above, the flow is directed to the seat. Before installing the valve, the internal cavities of the system must be cleaned of dirt, scale, sand and other foreign particles that affect the performance of the valve.

Note: Zetkama V229 has an improved seal design - a stainless bellows, which eliminates leakage along the rod. This type of valve does not require service, because it does not use a gland seal. Available to order.

Order example: Zetkama V229-150 - (DN 150, PN16, gray cast iron body)

Shut-off valve with bellows seal Zetkama V229 (flange)

Valve v229 is a type of shut-off valve that is designed to regulate the movement of water and steam through the water supply system. The element is installed arbitrarily. The main thing is that the direction of flow of the working medium coincides with the direction of the product itself (indicated by an arrow on the product body). It has found wide application in the gas, energy, oil and marine sectors.

What is special about v229 locking devices?

Bellows devices are so called because they contain a bellows seal for moving elements. The main part of the device is a bellows or corrugated tube. It is made of metal, which is welded and soldered to the upper or lower rings. Thanks to this assembly, the structure can boast of tightness and immobility of the assembly. With this design, leakage of substance along the rod is impossible.

Inside the bellows, a rod moves progressively, which regulates the movement of the flow spool. The deformation of the corrugations allows the bellows to change its length.

Attention! Shut-off valves Zetkama v229 are used where leakage of working substances into the environment. Typically, this type of valve lasts much longer than its stuffing box counterpart. However, as the bellows structure wears out, it will have to be completely replaced. Replacement is much easier than repairing or replacing a part in the valve.

Flanged shut-off valves are made from cast iron and of stainless steel, and is compacted using graphite.

Shut-off valve with bellows seal- a type of shut-off and control valves.

Characteristics

A shut-off valve with a bellows seal is distinguished by the presence of a special bellows assembly.

The basic part is a bellows. The bellows is a corrugation that can stretch and contract. The bellows can change its shape and is highly flexible. The upper part of the corrugation is connected to the valve body, and the lower part is connected to the shut-off element.

This method of connecting parts ensures maximum tightness of the housing and eliminates leaks.

The bellows-type valve allows you to completely close the through passage.

Shut-off bellows valves are used for transporting gas, water, steam, aggressive substances, oil and petroleum products, and gaseous mixtures.

Parts of the body and locking element are made of carbon or stainless steel. They are distinguished by durability, corrosion resistance, durability. The housing can withstand operating pressure of up to 16 MPa.

They differ according to the type of climatic modification: U - for temperate climate zones. Operating temperatures: from -40C to +40C.

Shut-off bellows valves are characterized by a high degree of tightness, simple design, small overall dimensions, ease of maintenance and repair work.

Operating principle

The bellows shut-off valve consists of a body, a cover and a bellows. The flywheel activates the locking element using torque.

The rotational movement of the flywheel is converted into linear movement of the rod. The rod controls the movement of the locking element (spool). Spool movement: reciprocating (up and down).

Thanks to the flexibility and ability to stretch the corrugation (bellows), the rod moves linearly inside the bellows assembly, which completely prevents the working medium from leaving the working chamber.

Corrugated insulation eliminates contact of working parts with an aggressive environment, which increases the service life of the product.

They differ in the type of control: manual, automatic, gear.

Classification

Shut-off bellows valves differ in the type of connection to the pipeline:

Claw bellows valves. It is a reliable type of connection due to the presence of an additional collar at the end sections of the connecting pipes. Used for small diameter pipes. Refers to a detachable type of connection ( threaded connection). Characterized by ease of installation, ease of maintenance, high level tightness.

Connection type: thread + collar.

Marking: 14nzh17p, 14nzh917p, 14s17p, 14s17p30-1.

Type of raw materials: stainless steel, carbon steel.

Flanged bellows valves. Connection type: flanges, fastening bolts.

Marking: 14s17st, 14s17st3, 14s917st, 14nzh17st, 14nzh17st1, 14nzh17st10, 14nzh17st19, 14nzh917st, 15nzh66nzh, 15nzh66p, 15nzh66p4, 15s66nzh.

Type of raw materials6 stainless steel, carbon steel.

Refers to detachable connection types. Characterized by universal properties in maintenance and operation.

Union bellows valves. Used for small diameter pipes.

Marking: 15s66p, 14nzh19st, 14nzh19p.

Through hole diameter: from 6 mm to 50 mm. Designed for long service life.

Connection feature: availability external thread on the inlet and outlet pipes.

Bellows welding valves. Connection type: permanent. Guarantees complete tightness and strength of the weld. They are used on overpasses transporting particularly dangerous and aggressive substances, eliminating leaks. Used on long-distance overpasses.

Application

Shut-off valves with bellows seal are used in the petrochemical industry, gas production industry, food and processing industries, medical and pharmaceutical industries, fuel and energy industries, metallurgical and foundry industries.

The bellows shut-off valve is the next stage in the technological improvement of the shut-off valve. The bellows shut-off valve is also designed to shut off the working medium in the pipeline. The main difference is the bellows seal. The valve bellows seal is a 100% sealed steel welded casing made from special steel. The bellows is welded on one side to the stem, on the other side it is either attached through a graphite seal or welded to the valve body. The bellows design ensures 100% tightness of the rod seal.

It is important to note the innovative nature of the bellows assembly. ARI-Armaturen is one of the creators of the bellows seal. Thanks to the range of know-how that goes into the production of the bellows in a gate valve, the gate valve bellows assembly is a high-tech unit that embodies the latest advances in material strength and manufacturing process technology. The consequence of this approach is that there is practically no need Maintenance and a very long valve service life - more than 10,000 opening and closing cycles.

The bellows sealed shut-off valve is offered by many manufacturers today. The end customer - in case of choosing this particular type of valve, should pay attention to a brief study of the issue of producing a bellows in this shut-off valve. After all, a shut-off valve with a bellows seal with a low-quality bellows can disappoint the Customer for a long time in equipment of this type.

The functions of a bellows-sealed shut-off valve can be expanded through various valve plug options.

If you have a need for a bellows shut-off valve, we can offer you this equipment from one of the creators of the bellows valve - the German concern ARI-Armaturen:

• ARI-FABA ®-Plus - shut-off valve with bellows seal for standard operation;
• ARI-FABA®-Supra I - shut-off valve with bellows seal for industrial use;
• ARI-FABA®-Supra C - shut-off valve with bellows seal for use in the chemical industry;
• ARI-FABA® LA - shut-off valve with bellows seal and extended design;
• ARI-FABA®-Plus ANSI - shut-off valve with bellows seal for standard operation, manufactured according to ANSI standard;
• ARI-FABA®-Supra I ANSI - shut-off valve with bellows seal for industrial use, manufactured according to ANSI standard;
• ARI-FABA®-Supra C ANSI is a shut-off valve with bellows seal for use in the chemical industry, manufactured according to the ANSI standard.

Nominal diameters from DN15 to DN400, nominal pressure from PN25 to PN40, operating temperature - from -60C to +450C.

The applications of bellows valves are very wide. They are used in industry, the chemical industry, power plants, heating installations, industrial installations with aggressive environments, steam plants, enrichment plants, gas supply, vacuum plants, installations with coolant oils.

The main advantage of these valves over shut-off valves with gland seals is the elimination of leakage of the working medium. The downside is the higher cost of the valve compared to a valve with a packing seal. This requires an economic and technological calculation of the use of this equipment. According to our calculations, a shut-off valve with a bellows seal is a significantly more economical solution over its service life compared to a shut-off valve with a gland seal.

You can learn more about the projects where bellows valves were used in the Implemented Projects section. .

Stop valve– this is a pipeline fitting with a valve as a shut-off element, moving parallel to the direction of flow of the pipeline’s working medium. Shut-off valves are used to completely shut off the flow of the medium and, unlike the gates of control valves, the gates of shut-off valves can be in one of two positions: either open or closed. Shut-off valves are exceptionally tight, easy to operate and maintain, and can be used for a wide variety of media (special versions are available for some media, such as aggressive media). As for shut-off bellows valves (as we will henceforth call shut-off valves with a bellows seal), at the moment this is probably best way sealing of the valve, superior to both stuffing box and diaphragm seals. A bellows seal is a resilient, bellows seal usually made from durable stainless steel or forged steel. The bellows is able to maintain tightness even under very significant physical, thermal and chemical influences. That is, it is resistant to mechanical damage caused by water hammer, and to high and low temperatures, and to aggressive environments.

Shut-off valves with bellows seal ARI-FABA 6a2/6a1

Bellows shut-off valves ARI-FABA (models 6a2 and 6a1) are used when even the slightest leakage of medium from the pipeline system. Note that ARI-FABA 6a2/6a1 shut-off valves are characterized by exceptional durability and reliability of the bellows seal. The fact is that repairing bellows valves is quite complicated and expensive, so often when the bellows wear out, the valve is replaced entirely. Here again the bellows shut-off valves ARI-FABA 6a2/6a1 represent The best decision in terms of savings today. These valves are manufactured with a forged steel bellows. They do not require frequent maintenance and are used to shut off the flow of water, steam, thermal oil and other media. Shut-off bellows valves ARI-FABA 6a2/6a1 have a protective seal reverse flow with the valve fully open, as well as an additional gland seal.

In addition, we highlight the presence of a safety element designed to protect the bellows from twisting. The upper part of the ARI-FABA 6a2/6a1 valves is made of stainless steel. These valves can be easily and quickly serviced directly at the installation site (that is, without dismantling) and are characterized by enviable durability, which makes them the most economical in comparison with bellows shut-off valves of other models. As an option, the manufacturer of this valve, the German company ARI-Armaturen, offers to equip ARI-FABA 6a2/6a1 valves with a control valve, which allows these valves to be used as shut-off and control pipeline valves. Please note that all products from

ARI-Armaturen companies undergo mandatory tests for tightness, resistance to pressure and temperature.

How to buy shut-off valves with bellows seal ARI-FABA 6a2/6a1

Better conditions Nomitek offers you the purchase of ARI-FABA 6a2/6a1 shut-off valves and other pipeline fittings from the German company ARI-Armaturen. We are official representative ARI in Russia, and therefore we offer German pipeline fittings at manufacturer prices, and sometimes even with an additional discount from ARI-Armaturen, which makes our conditions the best for any customer. To purchase fittings, you just need to fill out the pre-order form on our website, and if you need to clarify any details, then consult with our specialist. We will answer all your questions and send you a questionnaire to clarify the equipment parameters. As for the quality of injection molding machines from ARI-Armaturen, we note that all ARI fittings are manufactured at the company’s own facility in Germany, which guarantees compliance with the highest international standards and is confirmed by relevant certificates.