SPX Cooling Technologies TG MAG15-50 Definition and working principle, Materials, Pressure

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3.17.1 Definition and working principle

The safety relief valve built on top of TopGear pumps is designed to protect the pump against over- pressure. It limits the differential pressure (or working pressure) of the pump.

It is a spring-loaded pressure relief valve that opens rapidly by pop action when the working pressure increases to the set pressure on which the spring is set in advance.

The safety relief valve built on top of the TopGear pump may not be used permanently opened because the liquid will be heated up very fast by viscous friction losses. All power input will go to the pumped liquid that circulates in the pump when the safety relief valve is opened and no discharge flow is given.

The single safety relief valve protects the pump only in one direction of flow.

Heating

The spring casing of the safety relief valve can by provided by a welded jacket with thread connections to heat the area around the spring. The valve body is heated together with the pump because it is mounted directly on the pump casing.

3.17.2 Materials

The safety relief valve casing is made of grey cast iron (G) or stainless steel (R). The option heated spring casing is only available for cast iron pumps; in this case the spring casing is made of steel. The internals of the safety relief valve i.e. valve, spring, spring plates and adjusting bolt, and nut is made of stainless steel.

3.17.3 Pressure

Safety relief valves are divided into 4 working pressure classes i.e. 4, 6, 10 and 16 indicating the maximum working pressure for that valve. Each class has a standard set pressure at 1 bar above the indicated maximum working pressure. The set pressure can be set lower on request never higher.

Working pressure class

4

6

10

16

Standard set pressure (bar)

5

7

11

17

 

 

 

 

 

Working pressure range (bar)

1 – 4

3 – 6

5 – 10

9 – 16

Set pressure range (bar)

2 – 5

4 – 7

6 – 11

10 – 17

3.17.4 Heating

The weld on spring casing is provided with 2 thread connections. Flange connections are not available.

Maximum temperature:

200°C

Maximum pressure:

10 bar

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A.0500.551 – IM-TGMAG/02.00 EN (02/2008)

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Contents TopGear MAG EC-Declaration of conformity Contents Guidelines for assembly Rotor bearing assemblyInstallation Cleaning the pumpClearance adjustment Designation of threaded connections Instructions for re-using and disposal 20.1.1Maintenance instructions 20.1.2Pump cover and intermediate cover TT Hydraulic part Bearing bracket Jacket optionsPump cover and intermediate cover SS Pump cover and without jackets on intermediate cover TOCReception GeneralReception, handling and storage HandlingSafety GeneralPump unit handling InstallationPump units Name plate CE Declaration of Conformity Disassembly/assembly of the coupling guardBefore commissioning the pump unit Differential pressure = bar Quantity Symbol UnitTechnical conventions Maximum pressure at discharge flange design pressure = barPump family code TG = TopGear Pump range name Type designationExample Jacket options for pump cover 0 Pump cover without jacketsBushes on shaft materials Idler bush and idler materialsIdler pin materials Rotor and shaft materialsPump standard parts Operating principleGeneral performance Safety relief valve Working principleSound Self-priming operationSound level Main characteristicsPressure Sound level of a pump without driveSound level of the pump unit Internals Maximum and minimum allowable temperatureJacket options InfluencesMaximum torque of pump shaft and rotor material combination Maximum temperature of internalsOperation under hydrodynamic lubrication conditions Hyd = design constant for each pump sizeExtra clearances Mass moment of inertiaAxial and radial clearances Inner partsDiametral clearance on pin / idler bearing Play between gear teethMaximum size of solid particles Components of the magnetic drive Magnetic couplingSamarium Cobalt SmCo 280C Neodymium Iron Boron NdFeB 120 C Rotor bearing assemblyMaximum allowable temperature and nominal torque BelowSealing rings and gaskets Materials rotor bearing assemblyCirculation pump Material circulation pump partsMaterials Safety relief valveSafety relief valve heated spring casing Working pressure classPressure Definition and working principleMaterials HeatingSafety relief valve Relative adjustment Spring ratio Safety relief valveSingle safety relief valve Sectional drawings and part listsInstallation Heated spring casingIndoor installation AccessibilityOutdoor installation LocationStarting torque DrivesStability Radial load on shaft endSuction and discharge pipes Check after connecting whether the shaft can move freelyShaft rotation Forces and momentsSuction piping PipingIsolating valves Self-priming operationDrain lines Secondary pipingStrainer Heating jacketsFoundation pump unit Guidelines for assemblyTransport of pump unit Jacket on pump coverCombustion engines Shaft couplingAlignment tolerances Check temperature censor on canGuarding of moving parts Belt driveInstructions for start-up Cleaning the pumpCleaning suction line Venting and fillingChecklist Initial start-up Start-upShut-down Abnormal operationTrouble shooting Tion Preparation Maintenance instructionsInstructions for re-using and disposal Tools Motor safetyExternal cleaning Shut-downNuts and bolts Specific componentsFluid circuits Plastic or rubber componentsBack pull-out Clearance adjustmentFront pull-out 0600 8120 8110 8100 4000 0701 0040 0010 Threaded connection G example G 1/2 Designation of threaded connectionsThreaded connection Rp example Rp 1/2 Disassembly Disassembly of front-pull-out assemblyTake off top cover 0100 or safety relief valve Disassembly of top cover 0100 or safety relief valveDisassembly of bearing bracket Removal of bearing bracketRemoval of ball bearings Disassembly of pump shaft completeDisassembly of outer magnetic rotor Un-tighten cap head screws 8460 and remove them Disassembly of separation canDisassembly of back-pull-out assembly Take out O-rings 81308310 8520 8510 8500 8350-D 8400 0701 Assembly Assembly of bearing bracketTake care not to damage the outer rotor magnet Circulation pump Pre-assembly of the back-pull-outAdjustment of the axial clearance Mount axial bearing 8350-A into the insertAssembly of rotor shaft Axial clearance Assembly of the back-pull-out assembly to the pump casing Assembly of the separation canMount bearing bracket support 1700 to the bearing bracket Assembly of the bearing bracketAssembly of the front-pull-out assembly Measure the distances as indicated on the sketchTighten tap bolts 1010 crosswise with Specified torque Assembly of top cover 0100 or safety relief valveOn the pump cover 4000 with tap bolts TG MAG185-125 How to order sparesTG MAG15-50 to Hydraulic part Bearing bracketJackets on intermediate cover Jacket optionsJackets on pump cover 0220 0200 0310 0250 0240 0300 0320 0230 0210 Dimensional drawings TG MAG15-50 to 185-125 pumpsStainless steel Flange connectionsCast iron Jackets Single safety relief valve Safety relief valvesJackets dimensions Heated safety relief valve Dv dkWeights Mass Bracket supportCopyright 2008 SPX Corporate

TG MAG86-100, TG MAG23-65, TG MAG58-80, TG MAG15-50, TG MAG185-125 specifications

SPX Cooling Technologies has established itself as a leader in the design and manufacturing of cooling systems, offering a wide range of products tailored to meet specific industrial and commercial needs. Among its impressive lineup, the TG MAG series stands out, featuring models such as TG MAG185-125, TG MAG23-65, TG MAG86-100, TG MAG58-80, and TG MAG15-50. Each of these models combines innovative technology with robust performance characteristics, making them ideal choices for various applications.

The TG MAG185-125 model is designed for high-capacity cooling requirements, offering exceptional thermal performance while maintaining energy efficiency. Its advanced fan design minimizes noise levels, making it suitable for installations in noise-sensitive areas. Furthermore, the unit benefits from a corrosion-resistant construction, ensuring longevity and reliable operation in diverse environments.

For smaller applications, the TG MAG23-65 provides a compact solution without compromising on performance. This unit features a space-efficient design and utilizes high-efficiency fans that optimize airflow, thereby enhancing overall cooling efficiency. The integrated digital controls allow for precise temperature management, making it easy for operators to monitor and adjust settings as needed.

The TG MAG86-100 model serves as an ideal middle-ground solution, balancing capacity and efficiency. It incorporates state-of-the-art technology, such as variable speed drives, which adjust the fan speed based on cooling demand, resulting in significant energy savings. The design also promotes easy maintenance, with accessible components that facilitate regular servicing and inspections.

For medium-scale needs, the TG MAG58-80 combines durability with performance, featuring a robust frame that can withstand harsh operational conditions. Its efficient heat exchange technology maximizes cooling output while minimizing energy consumption. Moreover, the enhanced airflow system ensures uniform cooling across the entire unit.

Lastly, the TG MAG15-50 is perfect for smaller spaces where cooling requirements are less demanding. Despite its size, this model is equipped with cutting-edge features such as a compact structure and highly efficient cooling mechanisms to ensure effective performance. The easy installation process and low maintenance needs further enhance its appeal.

Overall, the TG MAG series provides a range of innovative cooling solutions tailored to meet diverse industrial requirements, characterized by efficiency, durability, and advanced technology, ensuring optimal performance across all operating conditions.
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