Technologies Used By Pliant Bellows For product Manufacturing

Pliant Bellows is the brand name of roars made by Kwality Products. Kwality Products has been doing business since 1975. The organization has developed to be one of the best assembling SME in India. It was begun as a vocation working unit to provide food the car business for its need in support movement. Over a timeframe it got included being developed of import substitute items in India. With its genuineness, responsibility and polished skill it was granted the keepsake and thankfulness from the Indian resistance research association. As time proceeded onward it got included in the assembling of aviation parts and maybe is the main little scale organization affirmed by Rolls Royce, USA for its helicopter motor segments in India. In year 2011 the organization spread to frame a joint endeavor organization with a Belgian accomplice to fabricate metal seals in India. 

Mean while the organization ran over different clients who needed metal Bellows of worldwide quality measures. With our rich involvement in fantastic items required in fluctuated scope of industry from atomic, Oil and gas, ultra high vacuum, material, safeguard et cetera, the organization came in the business sector with its item Metal Bellows under the brand name,  “Pliant Bellows”. The company decided to go for machines with world class standards (all the Bellow forming machine designs are prepared by US based designers and manufactured to international quality standards). The company is ISO 9001:2008 certified and is ready to serve all type of industry.

Pliant Bellows are manufactured using state of the art machines. The formed bellows are manufactured mainly by 2 types of processes.

1 ) HYDRO FORMING

·         The sheet (SS304L, SS16L, SS316Ti, SS321 and special alloys) is procured along with its test certificates from reputed suppliers.

·         The lot number is assigned for complete traceability of product from inward to dispatch.

·         The sheet is roll formed.

2 ) MECHANICAL EXPANDER

·         The sheet (SS304L, SS16L, SS316Ti, SS321 and special alloys) is procured along with its test certificates from reputed suppliers.

·         The lot number is assigned for complete traceability of product from inward to dispatch.

·         The sheet is roll formed.

Metal Bellows

BELLOWS DESIGN :

The bellows is the flexible element of the expansion joint. It must be strong enough circumferential to withstand the pressure and flexible enough longitudinally to accept the deflections for which it was designed, and as repetitively as necessary with a minimum resistance. This strength with flexibility is a unique design problem that is not often found in other components in industrial equipment.

Metal Bellows Design

Most engineered structures are designed to inhibit deflection when acted upon by outside forces. Since the bellows must accept deflections repetitively, and deflections result in stresses, these stresses must be kept as low as possible so that the repeated deflections will not result in premature fatigue failures. Reducing bending stress resulting from a given deflection is easily achieved by simply reducing the thickness of the bending member, which in the case of the bellows, is the convolution. However, in order to withstand the pressure, the convolution, which is also a pressure vessel, must have a thickness great enough that the pressure induced membrane stresses are equal to or less than the allowable stress levels of the materials at the design temperatures. This conflicting need for thickness for pressure and thinness for flexibility is the unique design problem faced by the expansion joint designer.

Howls are not springs, in that the vast majority of their redirection produce bowing anxieties in overabundance of the materials' yield quality. Seeing how different materials perform and their capacities in this "plastic" distortion locale requires years of experience and plan conditions based upon this exact comprehension. 

That howls routinely work "plastic-ally" ought not be a reason for worry, subsequent to the majority of the materials from which cries are made offer comparable exceptionally malleable qualities. Specifically, the perseverance furthest reaches of these materials, which can be approximately portrayed as the anxiety at which disappointment will happen at ten million cycles of rehashed focusing, is about the same as their yield stress, or the time when perpetual distortion will happen. A cries which is required to withstand 3000 cycles of a given redirection and weight, and which at last falls flat after 10,000 cycles, has unquestionably exhibited more than worthy execution. Nonetheless, it has encountered, amid every last cycle, twisting burdens far in overabundance of as far as possible and along these lines the yield stress, and once avoided, would not have returned all alone to their unique un-deflected length or shape, as a spring is required to do. At the end of the day, they would have "taken a set."

Products  :

1) Bellows Coupling.

2) Valve Bellows.

3) Pressure switches Bellows.

4) Axial Expansion Joints.

5) Lateral Expansion Joints.

6) Hinged Expansion Joints.

7) Gimbal Expansion Joints.

8) Inline Pressure Balanced Expansion Joints.

9) Elbow Pressure Balanced Expansion Joints.

VALVE BELLOWS

Bellow sealed valves are a new type of Industrial Process valves. These valves are popular due to the leakage free performance hence, called “Zero Leak Valves” or “Emission Free Valves”.

With the application of Bellow seals the gland packing is supplemented by a metallic Bellow cartridge. One end of the Bellow is connected to the valve bonnet and the other end to the stem. The bellow movement is in one plane as the stroke in the valve takes place. With no rotational movements involved the fluid gets sealed to a very high degree. The fluid flows through the bottom part of the valve as per the stem movement takes place. Due to the bellow covering the stem the seal does not contact the stem at all. As the stem is the moving part in the valve it is the source of leakage due to the wear and tear of gland packing. Due to this shielding of the stem by the bellow the valve operated in a leak free zone.

The life cycle of the metal Bellow is largely dependent on the process of bellow manufacturing. At Pliant Bellows we manufacture them by hydro forming process. The properties achieved by the hydro forming process are far superior as compared to other process like, diaphragm welded bellows or mechanically drawn bellows. It is extremely important that the bellows have the mechanical and metallurgical properties for long cycle life of an bellow to avoid

Valve Bellows Manufacture in India | Pune, Valve Bellows  in India | Pune valve bellows  is a device, which arranges and controls the surge of fluid (slurries, fluidized solids, liquids, and gasses) by closing, opening or to some degree blocking various ways. Really, the Valves Bellows are known as a pipe fitting yet consistently discussed in discrete class.

The fundamental vision of Micro finish is to give wonderful administrations to the clients, give top quality valves, lastly meet the exceptional time point of confinement of the client.

Bellows Couplings – Flexibility and Accuracy for Motion Control Applications

Bellows Couplings – Flexibility and Accuracy                for Motion Control Applications

Reliable, flexible and permanently backlash-free shaft coupling

SO IN SHORT ONE SHOULD USE THESE BELLOWS IN FOLLOWING CIRCUMSTANCES:

• Excellent misalignment capability (compensation of shaft misalignment)
• Minimum mass moment of inertia
• High torsional rigidity
• High availability due to flexible modular construction
• Simple and fast attachment via one screw
• Nominal torque: 16 up to 700 Nm

The torque on the clamping connection, which is transmitted via frictional locking, is dependent on the hub bore (shaft diameter). For permitted values and detailed information on size selection, please see the Product Catalog. Metal bellows couplings guarantee a zero backlash torque transmission with extremely high torsional stiffness and a low moment of inertia. Different types of bellows, conical bushings and clamping hubs are available for different applications.

BELLOWS COUPLINGS

CHARACTERISTICS OF METAL BELLOWS COUPLINGS:

1. Torque range up to 700 Nm
2. high torsional stiffness
3. temperatures of up to 350°C
4. high speed
5. optional: stainless steel

OUR PRODUCTS

Elbow Pressure Balanced Expansion Joint

An Elbow Pressure Balanced Expansion Joint is designed to absorb externally imposed axial movement without imposing pressure loading on the system. This is accomplished by using two bellows both at line pressure tied together and acting in opposite directions. It is used where pressure loading on piping or equipment is not acceptable.

UNIVERSAL EXPANSION JOINT

Universal expansion joints is made up of 2 elements of bellows joined together by a common spool piece so it is also called as Double Bellows Expansion Joint or Universal Bellows. A Universal Expansion Joint is generally used where more lateral movement is to be absorbed which is beyond the capacity of a single Axial Expansion Joint and when there is a limitation on the amount of lateral forces allowed by the connecting pipe system Universal expansion joints can take deflection in lateral, axial or angular movements.

Universal expansion joints




The universal expansion joint consists of two bellows separated by a pipe section or spool. The primary purpose of this arrangement is to have a unit which will accept large amounts of lateral deflection.

The amount of lateral deflection they can accept is a function of the amount of angulation. These joints have no restrains to resist pressure thrust like the axial. For a given bellows element, the amount of lateral deflection capability be increased or decreased by simply changing the length of the center spool.

A universal expansion joint is composed of two bellows connected by a common pipe or center spool. This type of assembly allows any combination of the three basic movements: axial, lateral and angular. A universal expansion joint is generally used In cases with more lateral movement than can be absorbed by a single axial expansion joint, or when there is a limitation on the amount ot lateral forces allowed by the connecting pipe system. The lateral movement capability of e universal expansion joint depends on the centro spool length. When using a universal expansion joint, anchors must be sufficiently designed to withstand the full thrust forces .

How to Improve Control Valve Bellows in Your Plant

Bellow sealed valves are a new type of Industrial Process valves. These valves are popular due to the leakage free performance hence, called “Zero Leak Valves” or “Emission Free Valves”.

With the application of Bellow seals the gland packing is supplemented by a metallic Bellow cartridge. One end of the Bellow is connected to the valve bonnet and the other end to the stem. The bellow movement is in one plane as the stroke in the valve takes place. With no rotational movements involved the fluid gets sealed to a very high degree. The fluid flows through the bottom part of the valve as per the stem movement takes place. Due to the bellow covering the stem the seal does not contact the stem at all. As the stem is the moving part in the valve it is the source of leakage due to the wear and tear of gland packing. Due to this shielding of the stem by the bellow the valve operated in a leak free zone. 

The life cycle of the metal Bellow is largely dependent on the process of bellow manufacturing. At Pliant Bellows we manufacture them by hydro forming process. The properties achieved by the hydro forming process are far superior as compared to other process like, diaphragm welded bellows or mechanically drawn bellows. It is extremely important that the bellows have the mechanical and metallurgical properties for long cycle life of an bellow to avoid

valve-bellows

Replace Valves as Needed

Finally, valves need to be replaced regularly to ensure optimum operation and safety. So once the valves in your system start to emit signs of trouble, it’s best to replace them with a new part immediately. Failure to do so will result in ultimate system failure.

More Information About Coupling Products To Be Continue Next Blog......!!!!