Dirt and Air Separators

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Norman Warren
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1 CX Dirt and Air Separators

CX Product Overview Dutypoint CX The Dutypoint CX range of separators are designed to automatically remove dirt and air from heating, cooling and process systems, ensuring optimum performance of your

2 CX Product Overview Dutypoint CX The Dutypoint CX range of separators are designed to automatically remove dirt and air from heating, cooling and process systems, ensuring optimum performance of your equipment at all times. These should be installed in all new buildings and can be retro-fitted into existing systems to provide economic and environmental benefits. Separators should be installed in any sizeable open or closed loop system, including chilled water systems, condenser water systems, and process water systems. We offer six different standard configurations in a multitude of sizes to ensure we can provide the best solution for your application: CXC Dirt and Air Separator Combined units used in pipelines to efficiently remove air, micro bubbles and particles. See pages 3 and 4. CXC-RE Dirt and Air Separator with removable element As the CXC but with a removable flange to facilitate easy cleaning and maintenance. See pages 3 and 4. CXA Air Separator Used in pipelines to remove air and micro bubbles. See pages 7 and 8. CXP Dirt Separator Used in pipelines to remove impurities and particles. See pages 5 and 6. CXP-RE Dirt Separator with removable element As the CXP but with a removable flange to facilitate easy cleaning and maintenance. See pages 5 and 6. CXX Balancing Tank with Dirt and Air Separator A combination of the above units, plus facilitating proper mixing to keep the flow in the boiler and distribution circuits the same, providing optimum hydraulic balance. See pages 9 and 10. Separator Specification Body Carbon Steel - ST 37 Connections PN16 Max. Working Temperature 110 C Max. Working Pressure 10 Bar Internal Element AISI 304 Stainless Steel Air Vent Specification Body Brass Connections Screwed Max. Working Temperature 110 C Max. Working Pressure 10 Bar Float Polypropylene All units are designed and manufactured in accordance with Pressure Equipment Directive 97/23/EC, Larger units up to DN600 are available to order. 2

3 Product Overview CX Sizing Guide Dirt and air separators should be used in both heating and cooling systems. For optimum results, the flow velocity should be less than 1.5m/s. If the flow velocity is above 1.5m/s, efficiency will be reduced. Size (DN) E 150 D Figure 1: Sizing Graph C A Flow (m3/h) 3 B Velocity V=1 m/s V = 1.5 m/s The following two installation examples may help in selecting the correct size unit (Figure 1): If the separator is installed in a low pressure, high temperature situation, the velocity should be 1.5m/s. On the Flow axis at point A (70m 3 /h), move vertically to point B on the 1.5m/s water velocity curve. Move left from point B to point D on the Dimensions axis. Choose the nearest dimension that is higher than point D. In this example you would select DN125. If the separator is installed in a high pressure, high temperature situation, the velocity should be 1m/s. On the Flow axis at point A (70m 3 /h), move vertically to point C on the 1m/s water velocity curve Move left from point C to point E on the Dimensions axis. Choose the nearest dimension that is higher than point E. In this example you would select DN150. Pressure Loss Use the chart below to determine the pressure loss across your chosen separator: Figure 2: Pressure Loss Graph 10 Separator Connection Size Pressure Loss (kpa) C 1 B Flow (m 3 /h) Pressure Loss Example: When the water flow is 70m 3 /h, the pressure loss for the DN150 dirt and air separator is 1kPa. 70 A On the Flow axis at point A (70m 3 /h), move vertically to point B on the DN150 line. Move left from point B to point C on the pressure loss axis. In this example the pressure loss would be 1 kpa. 3

CX Product Details CXC - Combined Dutypoint CXC combined dirt and air separators can be used instead of individual deaerators and dirt separators.

In heating systems, the units should be installed in the flow loop, situated immediately after the boiler and prior to the pump.

4 CX Product Details CXC - Combined Dutypoint CXC combined dirt and air separators can be used instead of individual deaerators and dirt separators. These combined units are very efficient and extremely cost effective, becoming the preferred standard option throughout the industry. In heating systems, the units should be installed in the flow loop, situated immediately after the boiler and prior to the pump. In a chilled water system the unit must be located in the return loop close to the chiller. Standard Technical Features Efficient removal of air and micro bubbles in pipework Effective removal of impurities and particles Stainless steel element Designed and manufactured in accordance with the Options Removable element Larger units up to DN600 available on request Non-standard connections Note Pressure Equipment Directive 97/23/EC The static head must not exceed 15m for a heating system and 5m for a cooling system. CX-C HiVENT Max 15m The efficiency of the unit will be reduced if the system static head exceeds 15m of system flow velocity exceeds 3m/s Boiler PUMP Heating System HiVENT Visit dutypoint.com for full product listings, specifications and more CX-C Chiller Max 5m Cooling System 4

5 Drawing and Dimensions CX Dutypoint CXC Variants Model No. Flow Rate (m 3 /h) Volume (L) Weight (kg) Dimensions DN (mm) OD (mm) A (mm) B (mm) C H (mm) CXC Combined CX50C " 632 CX65C " 632 CX80C " 791 CX100C " 791 CX125C " 1064 CX150C " 1064 CX200C " 1307 CX250C " 1568 CX300C " 1892 CXC-RE Combined with Removable Element CX50C-RE " 632 CX65C-RE " 632 CX80C-RE " 791 CX100C-RE " 791 CX125C-RE " 1064 CX150C-RE " 1064 CX200C-RE " 1307 CX250C-RE " 1568 CX300C-RE " 1892 R 2½" B R ½" O.D. DN A H (PN16 FLANGED) C 5

In heating systems this should be in the return loop close to the boiler. In a chilled water system the unit should be located in the return loop close to the chiller.

6 CX Product Details CXP - Dirt Separators Dutypoint CXP Dirt Separators are designed to remove impurities and particles. These units should always be installed in systems before equipment that requires protection from dirt and sludge, such as boilers, chillers, control valves and pumps. In heating systems this should be in the return loop close to the boiler. In a chilled water system the unit should be located in the return loop close to the chiller. Periodic draining of the CXP will keep the system free of impurities, prolonging the life of other installed equipment. Standard Technical Features Efficient removal of air and micro bubbles in pipework Stainless steel element Designed and manufactured in accordance with the Pressure Equipment Directive 97/23/EC Options Removable element Larger units up to DN600 available on request Non-standard connections HiVENT CX-P Max 15m PUMP Boiler Heating System HiVENT CX-P Max 5m Chiller Cooling System 6

7 Drawing and Dimensions CX Dutypoint CXP Variants Model No. Flow Rate (m 3 /h) Volume (L) Weight (kg) Dimensions DN (mm) OD (mm) A (mm) B (mm) C H (mm) CXP Dirt/Particle Separators CX50P " 385 CX65P " 385 CX80P " 570 CX100P " 570 CX125P " 701 CX150P " 701 CX200P " 900 CX250P " 1130 CX300P " 1150 CXP-RE Dirt/Particle Separators with Removable Element CX50P-RE " 385 CX65P-RE " 385 CX80P-RE " 570 CX100P-RE " 570 CX125P-RE " 701 CX150P-RE " 701 CX200P-RE " 900 CX250P-RE " 1130 CX300P-RE " 1150 DN (PN16 FLANGED) A H O.D. B C 7

CX Product Details CXA - Air Separators Dutypoint CXA air separator units are installed to efficiently remove air and micro bubbles from the system.

Air separators should ideally be installed immediately after the boiler and prior to the pump suction port as this is where the formation of micro bubbles is greatest.

8 CX Product Details CXA - Air Separators Dutypoint CXA air separator units are installed to efficiently remove air and micro bubbles from the system. In heating systems, an air separator should be installed in the flow loop where the system experiences the highest temperature (next to the heat source) and lowest pressure. Air separators should ideally be installed immediately after the boiler and prior to the pump suction port as this is where the formation of micro bubbles is greatest. In a chilled water system the unit must be located in the return loop just prior to the chiller. Standard Technical Features Efficient removal of air and micro bubbles in pipework Stainless steel element Designed and manufactured in accordance with the Pressure Equipment Directive 97/23/EC Options Larger units up to DN600 available on request Non-standard connections HiVENT CX-A Max 15m PUMP Boiler Heating System HiVENT CX-A Max 5m Chiller Cooling System 8

9 Drawing and Dimensions CX Dutypoint CXA Variants Model No. Flow Rate (m 3 /h) Volume (L) Weight (kg) Dimensions DN (mm) OD (mm) A (mm) B (mm) C H (mm) CXA Air Separators CX50A ½" 482 CX65A ½" 482 CX80A ½" 607 CX100A ½" 607 CX125A ½" 797 CX150A ½" 797 CX200A " 996 CX250A " 1227 CX300A " 1247 B R 2½" R ½" H O.D. DN A (PN16 FLANGED) C 9

CX Product Details CXX - Combined Dirt/Air Separator and Balancing Tank The Dutypoint CXX combines the benefits of a deaerator, a dirt separator and a hydraulic balancing tank in one unit.

The importance of having a well-balanced system cannot be overemphasised, as this greatly reduces energy consumption and increases boiler or chiller efficiency.

10 CX Product Details CXX - Combined Dirt/Air Separator and Balancing Tank The Dutypoint CXX combines the benefits of a deaerator, a dirt separator and a hydraulic balancing tank in one unit. This can be used instead of an individual deaerator and dirt separator, with the added advantage of creating a perfect hydraulic balance between the primary and secondary circuits. The importance of having a well-balanced system cannot be overemphasised, as this greatly reduces energy consumption and increases boiler or chiller efficiency. It is vastly more cost effective to purchase this combined unit rather than individual items - saving both initial cost and installation time. Standard Technical Features Efficient removal of air and micro bubbles in pipework Effective removal of impurities and particles Stainless steel element Designed and manufactured in accordance with the Pressure Equipment Directive 97/23/EC Enables perfect hydraulic balance between primary and secondary circuits Options Non-standard connections Larger units up to DN600 available on request BOILERS HEATING ZONE DOMESTIC HOT WATER ZONE LOW TEMPERATURE HEATING ZONE CX-X Visit dutypoint.com for full product listings, specifications and more PRIMARY SECONDARY 10

11 Drawing and Dimensions CX Dutypoint CXX Variants Model No. Flow Rate (m 3 /h) Volume (L) Weight (kg) Dimensions DN (mm) OD (mm) A (mm) B (mm) C (mm) H (mm) CXX Combined Dirt/Air Separator and Balancing Tank CX50X CX65X CX80X CX100X CX125X CX150X CX200X CX250X CX300X B DN (PN16 FLANGED) H O.D. 11

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