2852

2852 BURKERT | Alldatasheet

Document overview

• Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
• PDF pages: 10

Technical content

Visit product website  DATA SHEET Type 6724  2/2 or 3/2-way Whisper Valve with media separa- tion Type 7011  Direct-acting 2/2-way plunger valve Type 6624  2/2 and 3/2 way Bürkert TwinPower rocker solenoid valve with separating diaphragm Standard | EU | en | 2024-02-19 | 00 2-way proportional valve with pressure relief

• Excellent setting range Very small design for easy use in electronic devices Flange and plug-in connection for integration into valve blocks Reduced power consumption Operating pressure up to 7 bar(ü) The new proportional valve 2852 is pressure-compensated and therefore offers a high pressure level with low power consumption at the same time. The total dimen- sions of this valve were kept low with regards to integration in devices where com- pactness and low heating are required for each individual valve, while it still offers comparatively high flow rates. The valve is designed for installation in analytical and medical devices, but can also be used in similar applications in other markets. It possesses two kinds of mechanical integration and three different electrical con- nection types (strands, plugs and soldered contacts) that support all good integra- tion options in mechatronic systems. Product variants described in the data sheet may differ from the product presentation and description. Type description Can be combined with Type 2852 © Christian Bürkert GmbH & Co. KG, Subject to alteration

2 | 10Visit product website  Table of contents 1. General technical data 3 Circuit functions Approvals and conformities 3.2. Conformity 3.3. Standards 3.4. Foods and beverages/Hygiene 3.5. Others Oxygen Fuel gases 4. Materials 4 5. Dimensions 5 5.2. Cartridge version 6. Performance specifications 7 Flow characteristics as a function of the coil current Maximum flow rate as a function of the operating pressure 7. Product operation 8 8. Ordering information 9 8.2. 8.3. Bürkert product filter 8.4. Bürkert Product Enquiry Form 8.5. Ordering chart Standard version 8.6. Ordering chart accessories Manifolds Further accessories

3 | 10Visit product website  1. General technical data Product properties Dimensions Further information can be found in chapter “5. Dimensions” on page 5 Material Seal FKM Wetted materials Stainless steel 1.4113 1.4310 1.4305, PPS GF40 Performance data Typical values of positioning behaviour 1.) Hysteresis < 15 % Repeat accuracy < % FS 2.) Response sensitivity < 0.1 % FS 2.) Setting range > 1:500 Actuating time < ms 3.) Pressure range 4.) 0…7 bar KVS value 0.2 m3/h (measured with air, without back pressure) Leakage External: < ml/min (air) Internal: < ml/min (air) Electrical data Operating voltage 12 V/DC, 24 V/DC Power consumption 2.8 W (max. 3.4 Maximum coil current 280 mA with 12 V coil 140 mA with 24 V coil Valve control PWM frequency 5.) > 2000 Hz or DC voltage with constant current control Medium data Operating medium Gases Further information about checking the chemical resistance of the wetted materials can be found in chapter “4.1. Bürkert resistApp” on page 4 Medium temperature + °C…+ Process/Port connection & communication Port connection Flange, cartridge Electrical connection 300 mm flying leads, JST plug Approvals and conformities Degree of protection IP50 (flying leads version), IP10 (JST plug) Foods and beverages/Hygiene Further information can be found in chapter “3.4. Foods and beverages/Hygiene” on page 4 Others Further information can be found in chapter “3.5. Others” on page 4 Environment and installation Installation position As required, preferably with actuator upright Ambient temperature + 5…+ 1.) Characteristic data of positioning behaviour depends on process conditions. 2.) For flow measurement 3.) Determined according to DIN ISO 12238 4.) Pressure data: overpressure to atmospheric pressure, tightness seal pressure or nominal pressure 5.) PWM: pulse width modulation 2. Circuit functions Symbol Description 2 (A) 1 (P) Circuit function A (CF A) 2/2-way solenoid proportional control valve Direct-acting Normally closed

4 | 10Visit product website  3. Approvals and conformities 3.1. General notes

• The approvals and conformities listed below must be stated when making enquiries. This is the only way to ensure that the pro duct complies with all required specifications. Not all available versions can be supplied with the below mentioned approvals or conformities. 3.2. Conformity In accordance with the Declaration of Conformity, the product is compliant with the EU Directives. 3.3. Standards The applied standards which are used to demonstrate compliance with the EU Directives are listed in the EU-Type Examination Certificate and/or the EU Declaration of Conformity. 3.4. Foods and beverages/Hygiene Conformity Description USP United States Pharmacopeial Convention (USP) (valid for the variable code PL04) All wetted materials are biocompatible according to the manufacturer‘s declaration. 3.5. Others Oxygen Conformity Description Optional: Suitability for oxygen (valid for the variable code NL02) The products are suitable for use with gaseous oxygen, according to the manufacturer‘s declaration. Fuel gases Conformity Description Optional: DIN EN 549:2023 - 07 certification The wetted valve seals, which seal against the environment, are compliant with DIN EN 549:2023 07 (Rubber materials for seals and diaphragms for gas appliances and gas equipment) for medium temperatures of °C…+ 125 °C. 4. Materials 4.1. Bürkert resistApp Bürkert resistApp – Chemical resistance chart You want to ensure the reliability and durability of the materials in your individual application case? Verify your combination of media and materials on our website or in our resistApp. Start chemical resistance check

5 | 10Visit product website  5. Dimensions 5.1. Flange version Note: Dimensions in mm 36.8 1.5 15.9 4.1 B C 1.2 300 (strand length) B 15.9 C 37.2 D 0.5 D JST plug 0.2 x 45° 1.5 -0.08 +0.1 3.8 min.4 R1.25 M2.5 x 7 min. 21.3 ±0.15 30° R4.8 16 add-on dimension Rmax 6.3

6 | 10Visit product website  5.2. Cartridge version Note: Dimensions in mm 36.8 1.5 15.9 7.25 4.1 6.7 15.4 B C 1.2 300 (strand length) B 15.9 C 1.5 -0.08 0.2x45° 20° 20° 6.8 ±0.04 min.4 15.5 ±0.04 +0.1 3.7 R1 0.9 0.9 Rmax 6.3 R1.5 M2.5 x 7min. 16 add-on dimnsion R5.5 +0.2 30° 21.3 ±0.15 37.2 D 0.5 D JST plug

7 | 10Visit product website  6. Performance specifications 6.1. Flow characteristic Note: The design of the nominal size of proportional valves is very important for the correct functioning within the application. The nominal size must be selected so that, on the one hand, the desired flow range is achieved and that, on the other hand, a sufficient part of the total pressure drop occurs via the valve when the valve is fully open. This means that the flow range in the controlled system is completely determined by the proportional valve. The flow characteristics shown below have been recorded without back pressure and are purely exemplary. The flow characteristics may vary due to specific installation situations and operating conditions. The valve Type 2852 is suitable for applications with back pressure. With a high inlet pressure in conjunction with a high back pressure, it should be noted that the flow characteristic curve has an increasingly high gradient in some areas and that discontinuities may occur. High thermal load combined with high inlet pressure may have an impact on the flow characteristic in the lower flow range. This can have a negative effect on the control behaviour. For further information and support with the design, please contact your local Bürkert partner. Flow characteristics as a function of the coil current 100 150 200 250 300 350 40 60 80 100 120 14 0 Q [lN/min] I [mA] 1 bar 2.5 bar 5 bar 7 bar Maximum flow rate as a function of the operating pressure 100 150 200 250 300 350 0 1 2 3 4 5 6 7 Q [lN/min] P [barg]

8 | 10Visit product website  Determination of the KV value Pressure drop KV value for liquids KV value for gases [m3/h] [m3/h] Sub-critical p2 > 2 = Q ρ Δp1000 = Q 514 QN ρNT1 Δ pp2 Supercritical p2 < 2 = Q ρ Δp1000 = Q QN ρNT1 257 p1 KV Flow coefficient [m3/h] 1.) QN Standard flow rate [mN 3/h] 2.) p1 Inlet pressure [bar] 3.) p2 Outlet pressure [bar] 3.) ∆p Differential pressure p 1…p2 [bar] ρ Density [kg/m3] ρN Standard density [kg/m3] T1 Medium temperature [(273+t)K] 1.) Measured for water, ∆p = bar, over the value 2.) At reference conditions 1.013 bar and 0 °C (273 K) 3.) Absolute pressure 7. Product operation 7.1. Control unit Valve control takes place through a PWM signal (pulse-width modulation) or constant current control. The duty cycle of the PWM signal determines the coil current and hence the position of the plunger. The control signal has an influence on the hysteresis of the flow curve. Higher PWM frequencies lead to hysteresis reduction. Observe the PWM frequency and the operating voltage which are specified in chapter “1. General technical data” on page 3 The valve is suitable for 100 % continuous duty cycle, as long as a medium is flowing. However, the specified nominal voltage must not be exceeded. With a constantly high duty cycle and high ambient temperature at the same time, the achievable valve current is reduced since the valve heats up. Please note the design comments for such a control valve in chapter “6.1. Flow characteristic” on page 7

9 | 10Visit product website  8. Ordering information 8.1. Bürkert eShop Bürkert eShop – Easy ordering and quick delivery You want to find your desired Bürkert product or spare part quickly and order directly? Our online shop is available for you 24/7. Sign up and enjoy all the benefits. Order online now 8.2. Recommendation regarding product selection Note: Use the Product Enquiry Form (see “8.4. Bürkert Product Enquiry Form” on page 9 ) for information about the device layout and send it to us after completion. Please note the chapter “6.1. Flow characteristic” on page 7 on product selection. 8.3. Bürkert product filter Bürkert product filter – Get quickly to the right product You want to select products comfortably based on your technical requirements? Use the Bürkert product filter and find suitable articles for your application quickly and easily. Try out our product filter 8.4. Bürkert Product Enquiry Form Bürkert Product Enquiry Form – Your enquiry quickly and compactly Would you like to make a specific product enquiry based on your technical requirements? Use our Product Enquiry Form for this purpose. There you will find all the relevant informa- tion for your Bürkert contact. This will enable us to provide you with the best possible advice. Fill out the form now

10 | 10Visit product website  8.5. Ordering chart Standard version Circuit function Port connection K VS value water 1.) Nominal pressure Electrical connection Article no. Article no. [m³/h] [bar] 012/DC 024/DC CF A 2/2-way solenoid proportional control valve Direct-acting Normally closed 2 (A) 1 (P) Flange (FK16) 0.2 7 300 mm flying leads 20072813  20072815  JST connector 20076851  20076852 Cartridge (FC18) 0.2 7 300 mm flying leads 20059148  20059147 JST connector 20076847  20076850 1.) Measured with air, without back pressure Further versions on request Material Seal material EPDM Analytical Oxygen version, oil-, fat- and silicone-free parts Coil Version with plug contacts Approval USP Class VI 8.6. Ordering chart accessories Manifolds Note: Special custom-built manifolds are available on request. Further accessories Description Article no. Cable plug with 300 mm flying leads AWG 24 20081791 Terminal block G ⅛ for cartridge version (FC18) 20081629 Terminal block G ⅛ for flange version (FK16) 20081790 Flat headed screw M 2.5 x 6, TORX T8 - A2 for valve mounting on terminal block, 10 pieces 20057873