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

26

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

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SPX Cooling Technologies TG MAG15-50, TG MAG185-125 Definition and working principle, Materials, Pressure, Heating
Page 25 Page 27

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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