Ongoing pump maintenance is based on a number of factors, including mechanical seal replacement and an ability to service the pump without disturbing the piping. One end-suction centrifugal pump has a function that means the motor does not have to be moved for maintenance.
While mechanical seal replacement in VIL pumps is a relatively easy procedure, there is more to total service. This comprises replacement of the throttle bushing, impeller and pump shaft. In most cases, the motor must be removed, requiring space and sometimes hoisting equipment, even with a relatively small pump. Depending on where the VIL pump is installed within the system, it may need to be removed and lowered from the piping at the ceiling to the ground for safe servicing. This can add more maintenance downtime.
To conserve space, VIL pumps tend to be spaced close together, which can pose accessibility issues. It can be challenging, time consuming and pose a safety hazard for technicians to work on a large VIL pump between two others that continue to operate at full speed. One pump may need to be shut down, forfeiting redundancy and risking adequate capacity. Service access in a base-mount installation is straightforward because the layout of the system enables easier access.
Pump Life Expectancy
Base-mounted pumps can have greater reliability, extending product life. The mechanical seals in VIL pumps need external flushing tubes that can be vulnerable to damage and can plug over time, leading to premature seal failures and lower life expectancy. Base-mounted pumps have internal flushing capability that can pass up to three times more flow over the seal faces, helping reduce seal temperature.
In addition, some base-mounted pumps have two sets of bearings—one set for the thrust and radial load, and one set for the motor, reducing wear and tear. VIL pumps have only a motor bearing, which may reduce total life. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Equipment Life Expectancy Chart shows the longevity of base-mounted pumps.
Vibration, Support Factors
The rotating elements within a pump cause vibration. Both base-mounted and VIL pumps have motors and impellers that rotate, and both pumps are designed and manufactured to the same vibration standard (ANSI/HI 9.6.4). ANSI/HI 1.1-1.5, Centrifugal Pumps, for Nomenclature, Definitions, Application & Operation cites seven possible sources of vibration in pumps:

• recirculation radial forces at low flows
• fluid separation at high flows
• cavitation due to net positive suction head (NPSH)
• air entrainment or aeration of the liquid
• hydraulic resonance in the piping
• solids contained in the liquid
• wear of rotating components

A closer review of the ANSI/HI standard shows that base-mounted pumps can handle more vibration (per ANSI 9.6.4-2000). Inline pumps send their vibration into the system piping and ultimately the building structure.
Base-mounted pumps, typically attached to the ground, send their vibration into the earth, which can extend its equipment life (per ASHRAE 2015 handbook and the U.S. Department of Energy).
Vibration challenges must be managed based on the location of installation and required horsepower.
Inertia bases are necessary for pumps that are not installed on the ground floor to help absorb vibration. Base-mounted pumps installed on the ground floor only require a housekeeping pad. VIL pumps can be installed without an inertia base where the mass of the pumps, piping and water is relatively small, and the building, ceiling and piping can accept the load—generally less than 7.5 hp. In larger horsepower applications—usually greater than 25 hp—a base-mounted pump is recommended with an inertia base (ASHRAE HVAC Applications Handbook, section 48.44-45).
According to the ASHRAE HVAC Applications Handbook, in addition to inertia bases being required for most large horsepower applications not at ground level (i.e., base-mounted pumps), “all inline pumps should be mounted on free-standing springs, regardless of location.” This point is worth noting, as there are mounting requirements for both types of pumps.

For more info contact chilled water pump supplier in uae or call us at +971 4 252 2966

Regardless of the CHW plant location, an overall campus thermal utility master plan can provide the design options for consideration and evaluation of pumping schemes for circulating CHW. There are two common configurations for CHW plant pumping schemes that will work with the selected CHW equipment to deliver the CHW to a building or group of buildings:

1. Primary-secondary (PS)
2. Variable-primary (VP).

In the PS scheme, the primary CHW loop is typically constant volume flow while the secondary loop is variable volume flow. There are still some older systems where the secondary loop is also constant volume. This loop will have three-way valves located at some or all of the building loads to allow for required minimum flow rates. However, these systems are commonly being replaced because the technology and efficiencies of the chillers have increased, as have the energy costs associated with operating the distribution system. The VP scheme, sometimes called direct-primary, can be either a constant or a variable volume flow system. Again, because energy costs are so important, this loop is usually variable flow with variable frequency drives (VFDs) on the primary pumps.
The designer should become aware of the various advantages and disadvantages for either scheme, which include: central plant operators’ familiarity with their different operational modes, different size pump motor requirements, different capital investment requirements for infrastructure, and “low delta T syndrome.
Along with the discussion of pumping schemes, it is important to understand the phenomenon known as low delta T syndrome, and its subsequent impact on chiller plant capacity and energy usage.

For more info contact chilled water pump supplier in uae or call us at +971 4 252 2966

From the early years of HVAC design, the use of CHW to transfer heat from areas of higher loads (e.g., building loads at air handler coils, or industrial equipment loads at heat exchangers) to a condensing water loop or a refrigeration system for heat rejection has been successful. In a very broad sense, a CHW system consists of the following components:

• A heat absorption component such as a chiller (or evaporator)
• A compressor in a refrigerant cycle
• A heat rejection component such as a cooling tower (or radiator)
• CHW piping
• Either condenser water (CW) piping (for a water-cooled system) or refrigerant based piping (for an air-cooled or evaporative-cooled distribution system) to move the separate fluid systems between the respective components.

Each of the CHW and CW/refrigerant distribution systems will include various additional components and devices such as a pump, a compressor, an expansion tank, air separators/air eliminators, water or refrigerant treatment and filtration devices, isolation and control valves, and a controls system consisting of numerous temperature, pressure, and flow rate metering and control devices. For chillers using air cooling on the condenser side, there is no need for a condenser water loop including piping, cooling tower, and pump. For this article, the fluid systems discussed will be water only.
The CHW portion of the system circulates and flows between the chiller and the building loads through pumping by the CHW pump (although dependent upon the system, usually referred to as the primary pump), and can be operated as constant flow or variable flow. For water-cooled chillers, a condenser water loop is necessary, and always operates when the chiller is energized to operate. This loop also requires a condenser water pump to circulate the CW through the piping between the chiller and the cooling tower or heat rejection device (radiator or closed circuit cooler). The CW system has traditionally been a constant flow (CF) system, but recently designs have included variable flow (VF) in this system as well. Any variable flow application (CHW or CW) increases the intricacy of the design, construction, and operation of a system, but at times of low load and corresponding reduced flow rate requirement, may offer significant pump energy savings. Decisions regarding constant and variable system flows dictate designs typically referred to as primary/secondary (PS) and variable primary (VP) system designs.


Selecting a CF versus a VF system requires many considerations during the design effort. As with any design, the designers of a CHW system should consider various options and equipment through discussions with the owner, and recommend one or more of these options to meet the project goals and performance requirements. Among the many important items to consider regarding these system designs are any system constructability and budgetary constraints, system operability, operations and maintenance costs, and energy consumption costs.
Depending on the size of the building and the related cooling loads necessary to cool and dehumidify the building’s airstreams or other processes where some form of cooling is needed, the CHW system may have more than one of the larger components mentioned (chillers, cooling towers, pumps), and may be independent from nearby surrounding buildings. Or the building may have some combination of CHW distribution piping systems connected to a larger thermal utility network that serves several buildings simultaneously from a large, remote central plant arrangement.

For more info contact chilled water pump supplier in uae or call us at +971 4 2522966

Static pressure describes the resistance experienced by air as it travels through an HVAC system. In other words, it is the pressure a fan must overcome to move air through ducts, as needed for heating, ventilation and cooling. Static pressure and airflow are the two main aspects that determine the operating point of a fan, as well as power consumption.
Various types of HVAC equipment establish an airflow through ducts, and two common examples are air-handling units (AHU) and packaged rooftop units (RTU). These pieces of equipment are designed to deliver a specific performance in terms of airflow and velocity.
For an HVAC system to operate normally, equipment capabilities must match the needs of the air duct system. In particular, air handling systems must be capable of overcoming the static pressure. Other parameters considered by HVAC designers include the installed cost, operating expenses, maintenance, noise and vibration.

Friction Losses Calculated
For design purposes, losses are classified by their source: those caused by the ducts themselves, and those caused by fittings.

•     Duct friction losses depend on duct size, length and material roughness, as well as air velocity. The path with the highest pressure loss is called the critical path - a major factor to consider during duct design.
•     Fitting losses account for the highest fraction of total losses. They occur as air moves through filters, offsets, elbows, dampers, coils, and other fittings and accessories. ASHRAE provides fitting loss coefficients to simplify their selection - using the right fittings in the right locations can lead to significant cost reductions and energy savings.

Once all the duct losses have been accounted for, HVAC designers can easily select a fan that will provide the required static pressure and airflow.

For more info contact Chilled water pump supplier in uae or call us at +971 4 252 2966

If the water supply pressure is insufficient to meet the required pressure and flow values for plumbing fixtures, a water pressure booster system must be installed. There are three main options:

• An elevated water tank
• A hydro-pneumatic pressure booster
• A water pressure booster pump, which is the topic of this article

Keep in mind that the need for a water booster pump is partly determined by building characteristics; since the minimum pressure and flow rate values are specified at fixture outlets, the likelihood of needing a booster pump increases for taller buildings.
The Plumbing Code requires that all booster pumps be equipped with a low-pressure cutoff switch, which prevents the creation of a vacuum when the pressure on the suction side reaches values of 10 psi or less. When negative pressure isn’t accounted for, a phenomenon called cavitation occurs, where small bubbles rapidly form and collapse in the flowing water. Cavitation can cause localized shockwaves, damaging the booster pump impeller and inducing mechanical vibrations, which affect the motor driving the pump as wellowner. An individual water consumer is not allowed to supply pressurized water for neighboring buildings.
​
For more info contact booster pump suppliers in uae or call us at +971 4 252 2966

Keep in mind that low pressure and flow rates at fixture outlets have many possible causes, and you should not immediately assume that low water supply pressure is to blame. Before you install a water booster pump, make sure your problem is not due to one of the following causes:

• Clogged water pipes can cause a drastic pressure drop between the service entrance and the point of consumption, which is a common issue in older installations.
• Undersized pipes, a common result of poor plumbing design, can have the same effect as clogged water pipes.
• You could also have a partially closed shut-off valve causing pressure drop, and the solution is as simple as opening it fully.

In any of these scenarios, installing a water booster pump represents a waste of money, and the excessive pressure may actually damage your installation. Even if there is no damage, you will be wasting electric power to run the booster pump, and the excessive pressure will raise flowrates, increasing your water bill as well. Before you proceed, make sure you don’t have a partially closed valve, and get a professional assessment of your installation to verify that you don’t have piping issues.

For more info contact booster pump suppliers in uae or call us at +971 4 252 2966

As with all pieces of equipment driven by an electric motor, it is possible to save energy if a booster pump is equipped with a variable frequency drive (VFD) for speed control. For fractional horsepower motors, such as those used in small residential applications, electronically commutated motors (ECMs) are more cost-effective option than VFDs.
There are several reasons why it makes sense to deploy speed control for a booster pump:

• The required pressure boost may vary depending on current building conditions. For example, it may not be necessary when demand for water is low.
• Pressure variations may also be caused by the utility company. For example, low pressure issues may only be present when the water distribution system is experiencing peak demand.
• Variable frequency drives can be used to soft-start a water booster pump, preventing the inrush current, which is typically five to eight times higher than rated current. In absence of a soft-starting device, this inrush causes a sudden drop in voltage, which can damage sensitive electronic devices.

When a water booster pump is equipped with speed control, its operation can be adjusted in real time in response to building and water supply conditions, maximizing energy efficiency. In fractional horsepower applications, electronically commutated motors offer the highest energy efficiency available while offering built-in speed control. For pumps of higher horsepower, which are typically used in commercial applications, the best possible combination is having a three-phase motor with NEMA Premium efficiency equipped with a variable frequency drive.

For more info contact booster pump suppliers in uae or call us at +971 4 252 2966

The most important thing to remember when installing a power booster pump is that every pump is made slightly differently. That said there are certain unanimous rules that apply in every case, but there will be slight alterations and modifications required depending on the brand and make of pump you intend to install. For this reason, it is essential to have the relevant instructions for your pump to hand in the event that specific adjustments are required. By using this blog in tandem with your pump instructions, the install process for your bathroom should be effortless.

Read on to find out how to install a shower pump. Typically, pumps are used to provide both hot and cold water to your shower head. There are varying styles and types but twin impeller pumps are what most showers make use of. Make sure you have purchased the pump suited to your specifications and shower type. Here are our tips and suggestions to ensure that the process goes without a hitch:

How to Install a Shower Pump:
To Begin
1.The majority of showers require 50 gallons or 225 litres of water to operate effectively. It’s important to ensure that you have enough cold water stored so that your shower can run efficiently.

 2. Think about where you want your pump to be positioned. The best placement is at the bottom of the hot water cylinder or as close as you can get to it, but you might choose an alternate placement.

Connect Your Water
3. You’ll need to connect your water supply to your new pump. You can use a 22mm (please note that different pumps require different connections – at this point, consult your specified instruction manual) outlet connection that links the cold water tank to the pump. This can then be drilled into the opposite side of the tank to that which the float valve is located on. As it is advisable to create an isolated water source, it’s best to fit a 22mm full bore isolating valve into the new cold water supply pipe. 

4. When connecting to a hot water source, we advise installing a separate connection so that little air can permeate into the pump. The reason for this is that if too much air can get inside, it can damage the properties of the pump. 
​
5. You can use a flange to connect to your hot water cylinder.
For more info get in touch with booster pump suppliers in uae or call us at +971 4 252 2966

Anybody with a home that depends on a booster pump knows from experience the trouble of shortage of water during power outages for a long period. Seasonal storms, adverse weather, and blackouts may all affect water supply. The water pumps can restore access to water during these periods.

People utilize water on a regular basis for sanitation and health. A proper source of water is required for washing clothes and dishes, personal hygiene, and obviously, drinking. A water pump is an incredible solution for people with well and the electric water pumps can restore water supply during power outage. The water pumps for sale utilize laws of physics to bring the water to the surface. A pump can be installed with a current electrical pump without trouble.

It is vital to gather some measurements before selecting a booster pump,which will assist with the installation in the long run. First, proper depth should be determined. The depth of the static or ground water should be measured first. This is the distance from the top of the water in the tank to the top of the tank. The equipment pumps from the static level but should be set in a distance of almost 25 to 30 feet below the static level to maintain water supply, when the ground water level drops.
​
All the electric pumps should be made of durable and lead-free materials so that the water is safe for drinking purpose just like stainless steel. Proper water supply will keep the family hydrated; flushing in toilet and households will be able to have a convenient regular life. Some of these water pumps are also available in frost-proof designs. Maintaining proper supply of clean water will certainly keep families healthier.

For more info contact booster pump set uae or call us at +971 4 252 2966

As long as gravity exists, people will need pumps. If your application requires the pumping of groundwater, making sure you have the right pump for the job is essential. Using a pump that is incorrectly sized for an application can lead to damages in equipment and your wallet.

The first thing to keep in mind is the type of fluid you intend on pumping. Is it clear water or water, such as grey water, that is mixed with solids such as dirt and silt? The material you’re pumping can drastically change the model of pump you need. If you do expect solids, make sure your pump is suited for solids handling.
Next you’ll need to figure out how far exactly and where the water is going to be pumped. Knowing this will help you determine the required total dynamic head (TDH) and flow rate of your application, which are key factors when picking a pump.

Total dynamic head refers to the total resistance in a pumping application. To calculate the required total dynamic head, you will need to figure out two factors: vertical rise and friction loss. Vertical rise is how high your water will need to travel before gravity takes over. Friction loss is the loss of flow in a system due to friction created by factors like pipe type or fittings. You can follow this guide for more information on calculating TDH.

Once you know the TDH, you will need to figure out the total distance the water needs to be pumped, or how far from the source of the liquid to its ultimate destination. This will help determine your flow rate, or the velocity of the liquid traveling within a certain amount of time (usually measured in gallons per minute).

Once you know your specifications, you can refer to a pump curve chart to see if that model of pump will work for your application. Pump curve charts are a helpful tool in figuring out what a pump is capable of and in mapping out their efficiencies over various specifications. You can find these with technical experts on booster pump set uae , which are usually located in a pump’s brochure under the manuals tab on our product pages.

If you need additional help in sizing out a pump for your groundwater application, give our application engineers a call. They’re standing by to answer your questions and make sure you get the right pump for your application. They’ll basically do the work for you!
Pump Products applications engineers are standing by to help you find the right pump, as well as to provide price quotes, availability and shipping information. Call us at +971 4 252 2966.