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Recently, Viking Pump has introduced its next generation of pumps, which includes sizes H-QS in both steel and stainless steel. These new pumps come with a range of advantages that surpass those of their previous alloy counterparts, particularly in terms of sealing versatility. With this new series, users can enjoy a wider variety of sealing options within a single pump model, all while reducing costs and shortening lead times.
One of the standout components of these new pumps is the bracket, which is the large structure located behind the casing. This bracket features a rigid cast-in foot for secure mounting and houses essential parts such as the inboard shaft support bushing, the seal gland, and the outboard thrust control antifriction bearing housing. By integrating elements from the existing 123A, 127A, and 724 Series™ pumps, Viking Pump has managed to introduce patented features that were previously unavailable. For instance, users can now select either stuffing box seals or behind-the-rotor seals for the same pump model—a true game-changer!
Take, for example, the new 123C and 127C Seriesâ„¢ models. Unlike their predecessors, these models do not feature jackets, making them ideal for certain applications. However, Viking Pump also offers the 223C and 227C Seriesâ„¢ models with jacketed U-Plusâ„¢ brackets. These brackets allow the circulation of steam or heat transfer fluids, which is especially useful for melting ambient-temperature solids like resins, pitch, or even chocolate within the pump. Additionally, these models offer the option to add jacketed heads without relief valves or to incorporate jacketed relief valves on non-jacketed heads.
When it comes to sealing options, there are several choices available. Stuffing box seals can include packed glands, O-Pro® Guard seals, component mechanical seals, cartridge mechanical seals, or cartridge multiple-lip seals. Each type serves different purposes and brings unique advantages to the table.
For those who prefer a cost-effective solution, component mechanical seals are the way to go. They are the most affordable type of seal and are widely available. However, proper installation is crucial to avoid damaging the seal faces. To aid in this process, flush lines from the discharge port to the seal area of the bracket are standard with these seals. This ensures that any solids are flushed away and the seal faces remain cool.
On the other hand, cartridge type mechanical seals offer ease of installation. These seals are preassembled as a single unit, allowing for straightforward insertion into the pump stuffing box. Since the seal faces of the cartridge seal are not individually installed or handled, the risk of seal failure due to improper installation is significantly reduced. Single or double cartridge seals can be easily adapted to an API seal plan with barrier fluid, helping to minimize fugitive emissions escaping from the seal. Cartridge-type lip seals are also available, enabling the replacement of individual lips to reduce the lifecycle cost of the seal. These seals have proven to be highly effective in challenging applications like pumping adhesives.
Previously, mechanical seals mounted directly behind the rotor were only available on the stainless steel 4724 Seriesâ„¢ and the cast iron 4124B Seriesâ„¢ pumps. These seals prevented any liquid from entering the bracket and were commonly used for liquids that tended to solidify between the bracket bushing and the stuffing box seal. Now, these seals are available on all Next Generation models with U-Plusâ„¢ brackets, covering sizes H-QS. Additionally, Type 9 PTFE wedge seals are available for corrosive liquids up to 25,000 SSU (5,500 cSt).
The bearing housings have remained unchanged from the original 123A/127A models. They are threaded to allow adjustments in rotor end clearance within the pump. This makes it easier for users to rotate the bearing housing to accommodate varying viscosities—whether very low or very high—without sacrificing efficiency. Furthermore, adjustments can be made over time to account for rotor end wear, ensuring continued pump efficiency without the need to replace the rotor or shaft.
One of the key benefits of the U-Plus™ Bracket is its flexibility. If one type of seal doesn’t meet the user’s expectations regarding seal life or leakage prevention, it’s simple to switch to another type of stuffing box or behind-the-rotor seal. Moreover, these brackets are retrofittable onto existing Viking 123A/127A/223A/227A pumps and share common mounting dimensions.
In conclusion, Viking Pump’s new generation of pumps offers numerous advantages over previous models. From enhanced sealing options to improved adjustability and retrofit capabilities, these pumps deliver exceptional value and performance across a wide range of applications. Whether you’re dealing with high-viscosity materials or require precise sealing solutions, Viking Pump’s innovations ensure that users get the most out of their equipment.
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Hot Melt Adhesive For Carton And Box
Hot melt adhesive is a kind of plastic adhesive, in a certain temperature range, its physical state changes with the temperature, and the chemical characteristics remain unchanged, its non-toxic and tasteless, is an environmentally friendly chemical product.
Hot melt adhesive is the use of hot melt machine through the heat to melt the hot melt adhesive, the glue after melting into a liquid, through the hot melt machine throat and spray gun, sent to the surface of the bonded material, hot melt adhesive cooling is completed the bonding, it can meet the requirements of the carton sealing, and overcome the previous carton sealing form defects.
Advantages of hot melt adhesive bonding:
1, fast, the whole bonding process only takes 1-3 seconds to complete (even faster).
2, occupy less space, hot melt adhesive body shape is small, only a small space.
3, the lowest production cost per unit of product.
4, the bonding effect is good, the bonding strength is high, and the overall strength of the carton after bonding is strengthened, so that the carton is not easy to deform and crack.
5, no waste disposal problem. Meet the requirements of environmental protection, meet the requirements of export packaging.
6, with anti-theft effect, can cite whether the packaging object has been opened without authorization.
7, can adjust different spraying methods to play a role in identification and anti-counterfeiting.
Hot Melt Adhesive For Carton And Box,Carton Sealing Hot Melt Adhesive,Carton Sealing Hot Melt Glue,Hot Melt Adhesives Machine
Shenzhen Tongde New Materials Technology Co., Ltd. , https://www.tdhotmeltglue.com